import json
import logging
import re
from collections import defaultdict
from collections.abc import Iterator, Sequence
from json import JSONDecodeError
from typing import Optional

from pydantic import BaseModel, ConfigDict, Field
from sqlalchemy import func, select
from sqlalchemy.orm import Session

from constants import HIDDEN_VALUE
from core.entities.model_entities import ModelStatus, ModelWithProviderEntity, SimpleModelProviderEntity
from core.entities.provider_entities import (
    CustomConfiguration,
    ModelSettings,
    SystemConfiguration,
    SystemConfigurationStatus,
)
from core.helper import encrypter
from core.helper.model_provider_cache import ProviderCredentialsCache, ProviderCredentialsCacheType
from core.model_runtime.entities.model_entities import AIModelEntity, FetchFrom, ModelType
from core.model_runtime.entities.provider_entities import (
    ConfigurateMethod,
    CredentialFormSchema,
    FormType,
    ProviderEntity,
)
from core.model_runtime.model_providers.__base.ai_model import AIModel
from core.model_runtime.model_providers.model_provider_factory import ModelProviderFactory
from extensions.ext_database import db
from libs.datetime_utils import naive_utc_now
from models.provider import (
    LoadBalancingModelConfig,
    Provider,
    ProviderCredential,
    ProviderModel,
    ProviderModelCredential,
    ProviderModelSetting,
    ProviderType,
    TenantPreferredModelProvider,
)
from models.provider_ids import ModelProviderID

logger = logging.getLogger(__name__)

original_provider_configurate_methods: dict[str, list[ConfigurateMethod]] = {}


class ProviderConfiguration(BaseModel):
    """
    Provider configuration entity for managing model provider settings.

    This class handles:
    - Provider credentials CRUD and switch
    - Custom Model credentials CRUD and switch
    - System vs custom provider switching
    - Load balancing configurations
    - Model enablement/disablement

    TODO: lots of logic in a BaseModel entity should be separated, the exceptions should be classified
    """

    tenant_id: str
    provider: ProviderEntity
    preferred_provider_type: ProviderType
    using_provider_type: ProviderType
    system_configuration: SystemConfiguration
    custom_configuration: CustomConfiguration
    model_settings: list[ModelSettings]

    # pydantic configs
    model_config = ConfigDict(protected_namespaces=())

    def __init__(self, **data):
        super().__init__(**data)

        if self.provider.provider not in original_provider_configurate_methods:
            original_provider_configurate_methods[self.provider.provider] = []
            for configurate_method in self.provider.configurate_methods:
                original_provider_configurate_methods[self.provider.provider].append(configurate_method)

        if original_provider_configurate_methods[self.provider.provider] == [ConfigurateMethod.CUSTOMIZABLE_MODEL]:
            if (
                any(
                    len(quota_configuration.restrict_models) > 0
                    for quota_configuration in self.system_configuration.quota_configurations
                )
                and ConfigurateMethod.PREDEFINED_MODEL not in self.provider.configurate_methods
            ):
                self.provider.configurate_methods.append(ConfigurateMethod.PREDEFINED_MODEL)

    def get_current_credentials(self, model_type: ModelType, model: str) -> Optional[dict]:
        """
        Get current credentials.

        :param model_type: model type
        :param model: model name
        :return:
        """
        if self.model_settings:
            # check if model is disabled by admin
            for model_setting in self.model_settings:
                if model_setting.model_type == model_type and model_setting.model == model:
                    if not model_setting.enabled:
                        raise ValueError(f"Model {model} is disabled.")

        if self.using_provider_type == ProviderType.SYSTEM:
            restrict_models = []
            for quota_configuration in self.system_configuration.quota_configurations:
                if self.system_configuration.current_quota_type != quota_configuration.quota_type:
                    continue

                restrict_models = quota_configuration.restrict_models

            copy_credentials = (
                self.system_configuration.credentials.copy() if self.system_configuration.credentials else {}
            )
            if restrict_models:
                for restrict_model in restrict_models:
                    if (
                        restrict_model.model_type == model_type
                        and restrict_model.model == model
                        and restrict_model.base_model_name
                    ):
                        copy_credentials["base_model_name"] = restrict_model.base_model_name

            return copy_credentials
        else:
            credentials = None
            if self.custom_configuration.models:
                for model_configuration in self.custom_configuration.models:
                    if model_configuration.model_type == model_type and model_configuration.model == model:
                        credentials = model_configuration.credentials
                        break

            if not credentials and self.custom_configuration.provider:
                credentials = self.custom_configuration.provider.credentials

            return credentials

    def get_system_configuration_status(self) -> Optional[SystemConfigurationStatus]:
        """
        Get system configuration status.
        :return:
        """
        if self.system_configuration.enabled is False:
            return SystemConfigurationStatus.UNSUPPORTED

        current_quota_type = self.system_configuration.current_quota_type
        current_quota_configuration = next(
            (q for q in self.system_configuration.quota_configurations if q.quota_type == current_quota_type), None
        )
        if current_quota_configuration is None:
            return None

        if not current_quota_configuration:
            return SystemConfigurationStatus.UNSUPPORTED

        return (
            SystemConfigurationStatus.ACTIVE
            if current_quota_configuration.is_valid
            else SystemConfigurationStatus.QUOTA_EXCEEDED
        )

    def is_custom_configuration_available(self) -> bool:
        """
        Check custom configuration available.
        :return:
        """
        has_provider_credentials = (
            self.custom_configuration.provider is not None
            and len(self.custom_configuration.provider.available_credentials) > 0
        )

        has_model_configurations = len(self.custom_configuration.models) > 0
        return has_provider_credentials or has_model_configurations

    def _get_provider_record(self, session: Session) -> Provider | None:
        """
        Get custom provider record.
        """
        # get provider
        model_provider_id = ModelProviderID(self.provider.provider)
        provider_names = [self.provider.provider]
        if model_provider_id.is_langgenius():
            provider_names.append(model_provider_id.provider_name)

        stmt = select(Provider).where(
            Provider.tenant_id == self.tenant_id,
            Provider.provider_type == ProviderType.CUSTOM.value,
            Provider.provider_name.in_(provider_names),
        )

        return session.execute(stmt).scalar_one_or_none()

    def _get_specific_provider_credential(self, credential_id: str) -> dict | None:
        """
        Get a specific provider credential by ID.
        :param credential_id: Credential ID
        :return:
        """
        # Extract secret variables from provider credential schema
        credential_secret_variables = self.extract_secret_variables(
            self.provider.provider_credential_schema.credential_form_schemas
            if self.provider.provider_credential_schema
            else []
        )

        with Session(db.engine) as session:
            # Prefer the actual provider record name if exists (to handle aliased provider names)
            provider_record = self._get_provider_record(session)
            provider_name = provider_record.provider_name if provider_record else self.provider.provider

            stmt = select(ProviderCredential).where(
                ProviderCredential.id == credential_id,
                ProviderCredential.tenant_id == self.tenant_id,
                ProviderCredential.provider_name == provider_name,
            )

            credential = session.execute(stmt).scalar_one_or_none()

        if not credential or not credential.encrypted_config:
            raise ValueError(f"Credential with id {credential_id} not found.")

        try:
            credentials = json.loads(credential.encrypted_config)
        except JSONDecodeError:
            credentials = {}

        # Decrypt secret variables
        for key in credential_secret_variables:
            if key in credentials and credentials[key] is not None:
                try:
                    credentials[key] = encrypter.decrypt_token(tenant_id=self.tenant_id, token=credentials[key])
                except Exception:
                    pass

        return self.obfuscated_credentials(
            credentials=credentials,
            credential_form_schemas=self.provider.provider_credential_schema.credential_form_schemas
            if self.provider.provider_credential_schema
            else [],
        )

    def _check_provider_credential_name_exists(
        self, credential_name: str, session: Session, exclude_id: str | None = None
    ) -> bool:
        """
        not allowed same name when create or update a credential
        """
        stmt = select(ProviderCredential.id).where(
            ProviderCredential.tenant_id == self.tenant_id,
            ProviderCredential.provider_name == self.provider.provider,
            ProviderCredential.credential_name == credential_name,
        )
        if exclude_id:
            stmt = stmt.where(ProviderCredential.id != exclude_id)
        return session.execute(stmt).scalar_one_or_none() is not None

    def get_provider_credential(self, credential_id: str | None = None) -> dict | None:
        """
        Get provider credentials.

        :param credential_id: if provided, return the specified credential
        :return:
        """

        if credential_id:
            return self._get_specific_provider_credential(credential_id)

        # Default behavior: return current active provider credentials
        credentials = self.custom_configuration.provider.credentials if self.custom_configuration.provider else {}

        return self.obfuscated_credentials(
            credentials=credentials,
            credential_form_schemas=self.provider.provider_credential_schema.credential_form_schemas
            if self.provider.provider_credential_schema
            else [],
        )

    def validate_provider_credentials(
        self, credentials: dict, credential_id: str = "", session: Session | None = None
    ) -> dict:
        """
        Validate custom credentials.
        :param credentials: provider credentials
        :param credential_id: (Optional)If provided, can use existing credential's hidden api key to validate
        :param session: optional database session
        :return:
        """

        def _validate(s: Session) -> dict:
            # Get provider credential secret variables
            provider_credential_secret_variables = self.extract_secret_variables(
                self.provider.provider_credential_schema.credential_form_schemas
                if self.provider.provider_credential_schema
                else []
            )

            if credential_id:
                try:
                    stmt = select(ProviderCredential).where(
                        ProviderCredential.tenant_id == self.tenant_id,
                        ProviderCredential.provider_name == self.provider.provider,
                        ProviderCredential.id == credential_id,
                    )
                    credential_record = s.execute(stmt).scalar_one_or_none()
                    # fix origin data
                    if credential_record and credential_record.encrypted_config:
                        if not credential_record.encrypted_config.startswith("{"):
                            original_credentials = {"openai_api_key": credential_record.encrypted_config}
                        else:
                            original_credentials = json.loads(credential_record.encrypted_config)
                    else:
                        original_credentials = {}
                except JSONDecodeError:
                    original_credentials = {}

                # encrypt credentials
                for key, value in credentials.items():
                    if key in provider_credential_secret_variables:
                        # if send [__HIDDEN__] in secret input, it will be same as original value
                        if value == HIDDEN_VALUE and key in original_credentials:
                            credentials[key] = encrypter.decrypt_token(
                                tenant_id=self.tenant_id, token=original_credentials[key]
                            )

            model_provider_factory = ModelProviderFactory(self.tenant_id)
            validated_credentials = model_provider_factory.provider_credentials_validate(
                provider=self.provider.provider, credentials=credentials
            )

            for key, value in validated_credentials.items():
                if key in provider_credential_secret_variables:
                    validated_credentials[key] = encrypter.encrypt_token(self.tenant_id, value)

            return validated_credentials

        if session:
            return _validate(session)
        else:
            with Session(db.engine) as new_session:
                return _validate(new_session)

    def _generate_provider_credential_name(self, session) -> str:
        """
        Generate a unique credential name for provider.
        :return: credential name
        """
        return self._generate_next_api_key_name(
            session=session,
            query_factory=lambda: select(ProviderCredential).where(
                ProviderCredential.tenant_id == self.tenant_id,
                ProviderCredential.provider_name == self.provider.provider,
            ),
        )

    def _generate_custom_model_credential_name(self, model: str, model_type: ModelType, session) -> str:
        """
        Generate a unique credential name for custom model.
        :return: credential name
        """
        return self._generate_next_api_key_name(
            session=session,
            query_factory=lambda: select(ProviderModelCredential).where(
                ProviderModelCredential.tenant_id == self.tenant_id,
                ProviderModelCredential.provider_name == self.provider.provider,
                ProviderModelCredential.model_name == model,
                ProviderModelCredential.model_type == model_type.to_origin_model_type(),
            ),
        )

    def _generate_next_api_key_name(self, session, query_factory) -> str:
        """
        Generate next available API KEY name by finding the highest numbered suffix.
        :param session: database session
        :param query_factory: function that returns the SQLAlchemy query
        :return: next available API KEY name
        """
        try:
            stmt = query_factory()
            credential_records = session.execute(stmt).scalars().all()

            if not credential_records:
                return "API KEY 1"

            # Extract numbers from API KEY pattern using list comprehension
            pattern = re.compile(r"^API KEY\s+(\d+)$")
            numbers = [
                int(match.group(1))
                for cr in credential_records
                if cr.credential_name and (match := pattern.match(cr.credential_name.strip()))
            ]

            # Return next sequential number
            next_number = max(numbers, default=0) + 1
            return f"API KEY {next_number}"

        except Exception as e:
            logger.warning("Error generating next credential name: %s", str(e))
            return "API KEY 1"

    def create_provider_credential(self, credentials: dict, credential_name: str | None) -> None:
        """
        Add custom provider credentials.
        :param credentials: provider credentials
        :param credential_name: credential name
        :return:
        """
        with Session(db.engine) as session:
            if credential_name:
                if self._check_provider_credential_name_exists(credential_name=credential_name, session=session):
                    raise ValueError(f"Credential with name '{credential_name}' already exists.")
            else:
                credential_name = self._generate_provider_credential_name(session)

            credentials = self.validate_provider_credentials(credentials=credentials, session=session)
            provider_record = self._get_provider_record(session)
            try:
                new_record = ProviderCredential(
                    tenant_id=self.tenant_id,
                    provider_name=self.provider.provider,
                    encrypted_config=json.dumps(credentials),
                    credential_name=credential_name,
                )
                session.add(new_record)
                session.flush()

                if not provider_record:
                    # If provider record does not exist, create it
                    provider_record = Provider(
                        tenant_id=self.tenant_id,
                        provider_name=self.provider.provider,
                        provider_type=ProviderType.CUSTOM.value,
                        is_valid=True,
                        credential_id=new_record.id,
                    )
                    session.add(provider_record)

                    provider_model_credentials_cache = ProviderCredentialsCache(
                        tenant_id=self.tenant_id,
                        identity_id=provider_record.id,
                        cache_type=ProviderCredentialsCacheType.PROVIDER,
                    )
                    provider_model_credentials_cache.delete()

                    self.switch_preferred_provider_type(provider_type=ProviderType.CUSTOM, session=session)

                session.commit()
            except Exception:
                session.rollback()
                raise

    def update_provider_credential(
        self,
        credentials: dict,
        credential_id: str,
        credential_name: str | None,
    ) -> None:
        """
        update a saved provider credential (by credential_id).

        :param credentials: provider credentials
        :param credential_id: credential id
        :param credential_name: credential name
        :return:
        """
        with Session(db.engine) as session:
            if credential_name and self._check_provider_credential_name_exists(
                credential_name=credential_name, session=session, exclude_id=credential_id
            ):
                raise ValueError(f"Credential with name '{credential_name}' already exists.")

            credentials = self.validate_provider_credentials(
                credentials=credentials, credential_id=credential_id, session=session
            )
            provider_record = self._get_provider_record(session)
            stmt = select(ProviderCredential).where(
                ProviderCredential.id == credential_id,
                ProviderCredential.tenant_id == self.tenant_id,
                ProviderCredential.provider_name == self.provider.provider,
            )

            # Get the credential record to update
            credential_record = session.execute(stmt).scalar_one_or_none()
            if not credential_record:
                raise ValueError("Credential record not found.")
            try:
                # Update credential
                credential_record.encrypted_config = json.dumps(credentials)
                credential_record.updated_at = naive_utc_now()
                if credential_name:
                    credential_record.credential_name = credential_name
                session.commit()

                if provider_record and provider_record.credential_id == credential_id:
                    provider_model_credentials_cache = ProviderCredentialsCache(
                        tenant_id=self.tenant_id,
                        identity_id=provider_record.id,
                        cache_type=ProviderCredentialsCacheType.PROVIDER,
                    )
                    provider_model_credentials_cache.delete()

                self._update_load_balancing_configs_with_credential(
                    credential_id=credential_id,
                    credential_record=credential_record,
                    credential_source="provider",
                    session=session,
                )
            except Exception:
                session.rollback()
                raise

    def _update_load_balancing_configs_with_credential(
        self,
        credential_id: str,
        credential_record: ProviderCredential | ProviderModelCredential,
        credential_source: str,
        session: Session,
    ) -> None:
        """
        Update load balancing configurations that reference the given credential_id.

        :param credential_id: credential id
        :param credential_record: the encrypted_config and credential_name
        :param credential_source: the credential comes from the provider_credential(`provider`)
            or the provider_model_credential(`custom_model`)
        :param session: the database session
        :return:
        """
        # Find all load balancing configs that use this credential_id
        stmt = select(LoadBalancingModelConfig).where(
            LoadBalancingModelConfig.tenant_id == self.tenant_id,
            LoadBalancingModelConfig.provider_name == self.provider.provider,
            LoadBalancingModelConfig.credential_id == credential_id,
            LoadBalancingModelConfig.credential_source_type == credential_source,
        )
        load_balancing_configs = session.execute(stmt).scalars().all()

        if not load_balancing_configs:
            return

        # Update each load balancing config with the new credentials
        for lb_config in load_balancing_configs:
            # Update the encrypted_config with the new credentials
            lb_config.encrypted_config = credential_record.encrypted_config
            lb_config.name = credential_record.credential_name
            lb_config.updated_at = naive_utc_now()

            # Clear cache for this load balancing config
            lb_credentials_cache = ProviderCredentialsCache(
                tenant_id=self.tenant_id,
                identity_id=lb_config.id,
                cache_type=ProviderCredentialsCacheType.LOAD_BALANCING_MODEL,
            )
            lb_credentials_cache.delete()

        session.commit()

    def delete_provider_credential(self, credential_id: str) -> None:
        """
        Delete a saved provider credential (by credential_id).

        :param credential_id: credential id
        :return:
        """
        with Session(db.engine) as session:
            stmt = select(ProviderCredential).where(
                ProviderCredential.id == credential_id,
                ProviderCredential.tenant_id == self.tenant_id,
                ProviderCredential.provider_name == self.provider.provider,
            )

            # Get the credential record to update
            credential_record = session.execute(stmt).scalar_one_or_none()
            if not credential_record:
                raise ValueError("Credential record not found.")

            # Check if this credential is used in load balancing configs
            lb_stmt = select(LoadBalancingModelConfig).where(
                LoadBalancingModelConfig.tenant_id == self.tenant_id,
                LoadBalancingModelConfig.provider_name == self.provider.provider,
                LoadBalancingModelConfig.credential_id == credential_id,
                LoadBalancingModelConfig.credential_source_type == "provider",
            )
            lb_configs_using_credential = session.execute(lb_stmt).scalars().all()
            try:
                for lb_config in lb_configs_using_credential:
                    lb_credentials_cache = ProviderCredentialsCache(
                        tenant_id=self.tenant_id,
                        identity_id=lb_config.id,
                        cache_type=ProviderCredentialsCacheType.LOAD_BALANCING_MODEL,
                    )
                    lb_credentials_cache.delete()
                    session.delete(lb_config)

                # Check if this is the currently active credential
                provider_record = self._get_provider_record(session)

                # Check available credentials count BEFORE deleting
                # if this is the last credential, we need to delete the provider record
                count_stmt = select(func.count(ProviderCredential.id)).where(
                    ProviderCredential.tenant_id == self.tenant_id,
                    ProviderCredential.provider_name == self.provider.provider,
                )
                available_credentials_count = session.execute(count_stmt).scalar() or 0
                session.delete(credential_record)

                if provider_record and available_credentials_count <= 1:
                    # If all credentials are deleted, delete the provider record
                    session.delete(provider_record)

                    provider_model_credentials_cache = ProviderCredentialsCache(
                        tenant_id=self.tenant_id,
                        identity_id=provider_record.id,
                        cache_type=ProviderCredentialsCacheType.PROVIDER,
                    )
                    provider_model_credentials_cache.delete()
                    self.switch_preferred_provider_type(provider_type=ProviderType.SYSTEM, session=session)
                elif provider_record and provider_record.credential_id == credential_id:
                    provider_record.credential_id = None
                    provider_record.updated_at = naive_utc_now()

                    provider_model_credentials_cache = ProviderCredentialsCache(
                        tenant_id=self.tenant_id,
                        identity_id=provider_record.id,
                        cache_type=ProviderCredentialsCacheType.PROVIDER,
                    )
                    provider_model_credentials_cache.delete()
                    self.switch_preferred_provider_type(provider_type=ProviderType.SYSTEM, session=session)

                session.commit()
            except Exception:
                session.rollback()
                raise

    def switch_active_provider_credential(self, credential_id: str) -> None:
        """
        Switch active provider credential (copy the selected one into current active snapshot).

        :param credential_id: credential id
        :return:
        """
        with Session(db.engine) as session:
            stmt = select(ProviderCredential).where(
                ProviderCredential.id == credential_id,
                ProviderCredential.tenant_id == self.tenant_id,
                ProviderCredential.provider_name == self.provider.provider,
            )
            credential_record = session.execute(stmt).scalar_one_or_none()
            if not credential_record:
                raise ValueError("Credential record not found.")

            provider_record = self._get_provider_record(session)
            if not provider_record:
                raise ValueError("Provider record not found.")

            try:
                provider_record.credential_id = credential_record.id
                provider_record.updated_at = naive_utc_now()
                session.commit()

                provider_model_credentials_cache = ProviderCredentialsCache(
                    tenant_id=self.tenant_id,
                    identity_id=provider_record.id,
                    cache_type=ProviderCredentialsCacheType.PROVIDER,
                )
                provider_model_credentials_cache.delete()
                self.switch_preferred_provider_type(ProviderType.CUSTOM, session=session)
            except Exception:
                session.rollback()
                raise

    def _get_custom_model_record(
        self,
        model_type: ModelType,
        model: str,
        session: Session,
    ) -> ProviderModel | None:
        """
        Get custom model credentials.
        """
        # get provider model

        model_provider_id = ModelProviderID(self.provider.provider)
        provider_names = [self.provider.provider]
        if model_provider_id.is_langgenius():
            provider_names.append(model_provider_id.provider_name)

        stmt = select(ProviderModel).where(
            ProviderModel.tenant_id == self.tenant_id,
            ProviderModel.provider_name.in_(provider_names),
            ProviderModel.model_name == model,
            ProviderModel.model_type == model_type.to_origin_model_type(),
        )

        return session.execute(stmt).scalar_one_or_none()

    def _get_specific_custom_model_credential(
        self, model_type: ModelType, model: str, credential_id: str
    ) -> dict | None:
        """
        Get a specific provider credential by ID.
        :param credential_id: Credential ID
        :return:
        """
        model_credential_secret_variables = self.extract_secret_variables(
            self.provider.model_credential_schema.credential_form_schemas
            if self.provider.model_credential_schema
            else []
        )

        with Session(db.engine) as session:
            stmt = select(ProviderModelCredential).where(
                ProviderModelCredential.id == credential_id,
                ProviderModelCredential.tenant_id == self.tenant_id,
                ProviderModelCredential.provider_name == self.provider.provider,
                ProviderModelCredential.model_name == model,
                ProviderModelCredential.model_type == model_type.to_origin_model_type(),
            )

            credential_record = session.execute(stmt).scalar_one_or_none()

        if not credential_record or not credential_record.encrypted_config:
            raise ValueError(f"Credential with id {credential_id} not found.")

        try:
            credentials = json.loads(credential_record.encrypted_config)
        except JSONDecodeError:
            credentials = {}

        # Decrypt secret variables
        for key in model_credential_secret_variables:
            if key in credentials and credentials[key] is not None:
                try:
                    credentials[key] = encrypter.decrypt_token(tenant_id=self.tenant_id, token=credentials[key])
                except Exception:
                    pass

        current_credential_id = credential_record.id
        current_credential_name = credential_record.credential_name
        credentials = self.obfuscated_credentials(
            credentials=credentials,
            credential_form_schemas=self.provider.model_credential_schema.credential_form_schemas
            if self.provider.model_credential_schema
            else [],
        )

        return {
            "current_credential_id": current_credential_id,
            "current_credential_name": current_credential_name,
            "credentials": credentials,
        }

    def _check_custom_model_credential_name_exists(
        self, model_type: ModelType, model: str, credential_name: str, session: Session, exclude_id: str | None = None
    ) -> bool:
        """
        not allowed same name when create or update a credential
        """
        stmt = select(ProviderModelCredential).where(
            ProviderModelCredential.tenant_id == self.tenant_id,
            ProviderModelCredential.provider_name == self.provider.provider,
            ProviderModelCredential.model_name == model,
            ProviderModelCredential.model_type == model_type.to_origin_model_type(),
            ProviderModelCredential.credential_name == credential_name,
        )
        if exclude_id:
            stmt = stmt.where(ProviderModelCredential.id != exclude_id)
        return session.execute(stmt).scalar_one_or_none() is not None

    def get_custom_model_credential(
        self, model_type: ModelType, model: str, credential_id: str | None
    ) -> Optional[dict]:
        """
        Get custom model credentials.

        :param model_type: model type
        :param model: model name
        :return:
        """
        # If credential_id is provided, return the specific credential
        if credential_id:
            return self._get_specific_custom_model_credential(
                model_type=model_type, model=model, credential_id=credential_id
            )

        for model_configuration in self.custom_configuration.models:
            if (
                model_configuration.model_type == model_type
                and model_configuration.model == model
                and model_configuration.credentials
            ):
                current_credential_id = model_configuration.current_credential_id
                current_credential_name = model_configuration.current_credential_name
                credentials = self.obfuscated_credentials(
                    credentials=model_configuration.credentials,
                    credential_form_schemas=self.provider.model_credential_schema.credential_form_schemas
                    if self.provider.model_credential_schema
                    else [],
                )
                return {
                    "current_credential_id": current_credential_id,
                    "current_credential_name": current_credential_name,
                    "credentials": credentials,
                }
        return None

    def validate_custom_model_credentials(
        self,
        model_type: ModelType,
        model: str,
        credentials: dict,
        credential_id: str = "",
        session: Session | None = None,
    ) -> dict:
        """
        Validate custom model credentials.

        :param model_type: model type
        :param model: model name
        :param credentials: model credentials dict
        :param credential_id: (Optional)If provided, can use existing credential's hidden api key to validate
        :return:
        """

        def _validate(s: Session) -> dict:
            # Get provider credential secret variables
            provider_credential_secret_variables = self.extract_secret_variables(
                self.provider.model_credential_schema.credential_form_schemas
                if self.provider.model_credential_schema
                else []
            )

            if credential_id:
                try:
                    stmt = select(ProviderModelCredential).where(
                        ProviderModelCredential.id == credential_id,
                        ProviderModelCredential.tenant_id == self.tenant_id,
                        ProviderModelCredential.provider_name == self.provider.provider,
                        ProviderModelCredential.model_name == model,
                        ProviderModelCredential.model_type == model_type.to_origin_model_type(),
                    )
                    credential_record = s.execute(stmt).scalar_one_or_none()
                    original_credentials = (
                        json.loads(credential_record.encrypted_config)
                        if credential_record and credential_record.encrypted_config
                        else {}
                    )
                except JSONDecodeError:
                    original_credentials = {}

                # decrypt credentials
                for key, value in credentials.items():
                    if key in provider_credential_secret_variables:
                        # if send [__HIDDEN__] in secret input, it will be same as original value
                        if value == HIDDEN_VALUE and key in original_credentials:
                            credentials[key] = encrypter.decrypt_token(
                                tenant_id=self.tenant_id, token=original_credentials[key]
                            )

            model_provider_factory = ModelProviderFactory(self.tenant_id)
            validated_credentials = model_provider_factory.model_credentials_validate(
                provider=self.provider.provider, model_type=model_type, model=model, credentials=credentials
            )

            for key, value in validated_credentials.items():
                if key in provider_credential_secret_variables:
                    validated_credentials[key] = encrypter.encrypt_token(self.tenant_id, value)

            return validated_credentials

        if session:
            return _validate(session)
        else:
            with Session(db.engine) as new_session:
                return _validate(new_session)

    def create_custom_model_credential(
        self, model_type: ModelType, model: str, credentials: dict, credential_name: str | None
    ) -> None:
        """
        Create a custom model credential.

        :param model_type: model type
        :param model: model name
        :param credentials: model credentials dict
        :return:
        """
        with Session(db.engine) as session:
            if credential_name:
                if self._check_custom_model_credential_name_exists(
                    model=model, model_type=model_type, credential_name=credential_name, session=session
                ):
                    raise ValueError(f"Model credential with name '{credential_name}' already exists for {model}.")
            else:
                credential_name = self._generate_custom_model_credential_name(
                    model=model, model_type=model_type, session=session
                )
            # validate custom model config
            credentials = self.validate_custom_model_credentials(
                model_type=model_type, model=model, credentials=credentials, session=session
            )
            provider_model_record = self._get_custom_model_record(model_type=model_type, model=model, session=session)

            try:
                credential = ProviderModelCredential(
                    tenant_id=self.tenant_id,
                    provider_name=self.provider.provider,
                    model_name=model,
                    model_type=model_type.to_origin_model_type(),
                    encrypted_config=json.dumps(credentials),
                    credential_name=credential_name,
                )
                session.add(credential)
                session.flush()

                # save provider model
                if not provider_model_record:
                    provider_model_record = ProviderModel(
                        tenant_id=self.tenant_id,
                        provider_name=self.provider.provider,
                        model_name=model,
                        model_type=model_type.to_origin_model_type(),
                        credential_id=credential.id,
                        is_valid=True,
                    )
                    session.add(provider_model_record)

                session.commit()

                provider_model_credentials_cache = ProviderCredentialsCache(
                    tenant_id=self.tenant_id,
                    identity_id=provider_model_record.id,
                    cache_type=ProviderCredentialsCacheType.MODEL,
                )
                provider_model_credentials_cache.delete()
            except Exception:
                session.rollback()
                raise

    def update_custom_model_credential(
        self, model_type: ModelType, model: str, credentials: dict, credential_name: str | None, credential_id: str
    ) -> None:
        """
        Update a custom model credential.

        :param model_type: model type
        :param model: model name
        :param credentials: model credentials dict
        :param credential_name: credential name
        :param credential_id: credential id
        :return:
        """
        with Session(db.engine) as session:
            if credential_name and self._check_custom_model_credential_name_exists(
                model=model,
                model_type=model_type,
                credential_name=credential_name,
                session=session,
                exclude_id=credential_id,
            ):
                raise ValueError(f"Model credential with name '{credential_name}' already exists for {model}.")
            # validate custom model config
            credentials = self.validate_custom_model_credentials(
                model_type=model_type,
                model=model,
                credentials=credentials,
                credential_id=credential_id,
                session=session,
            )
            provider_model_record = self._get_custom_model_record(model_type=model_type, model=model, session=session)

            stmt = select(ProviderModelCredential).where(
                ProviderModelCredential.id == credential_id,
                ProviderModelCredential.tenant_id == self.tenant_id,
                ProviderModelCredential.provider_name == self.provider.provider,
                ProviderModelCredential.model_name == model,
                ProviderModelCredential.model_type == model_type.to_origin_model_type(),
            )
            credential_record = session.execute(stmt).scalar_one_or_none()
            if not credential_record:
                raise ValueError("Credential record not found.")

            try:
                # Update credential
                credential_record.encrypted_config = json.dumps(credentials)
                credential_record.updated_at = naive_utc_now()
                if credential_name:
                    credential_record.credential_name = credential_name
                session.commit()

                if provider_model_record and provider_model_record.credential_id == credential_id:
                    provider_model_credentials_cache = ProviderCredentialsCache(
                        tenant_id=self.tenant_id,
                        identity_id=provider_model_record.id,
                        cache_type=ProviderCredentialsCacheType.MODEL,
                    )
                    provider_model_credentials_cache.delete()

                self._update_load_balancing_configs_with_credential(
                    credential_id=credential_id,
                    credential_record=credential_record,
                    credential_source="custom_model",
                    session=session,
                )
            except Exception:
                session.rollback()
                raise

    def delete_custom_model_credential(self, model_type: ModelType, model: str, credential_id: str) -> None:
        """
        Delete a saved provider credential (by credential_id).

        :param credential_id: credential id
        :return:
        """
        with Session(db.engine) as session:
            stmt = select(ProviderModelCredential).where(
                ProviderModelCredential.id == credential_id,
                ProviderModelCredential.tenant_id == self.tenant_id,
                ProviderModelCredential.provider_name == self.provider.provider,
                ProviderModelCredential.model_name == model,
                ProviderModelCredential.model_type == model_type.to_origin_model_type(),
            )
            credential_record = session.execute(stmt).scalar_one_or_none()
            if not credential_record:
                raise ValueError("Credential record not found.")

            lb_stmt = select(LoadBalancingModelConfig).where(
                LoadBalancingModelConfig.tenant_id == self.tenant_id,
                LoadBalancingModelConfig.provider_name == self.provider.provider,
                LoadBalancingModelConfig.credential_id == credential_id,
                LoadBalancingModelConfig.credential_source_type == "custom_model",
            )
            lb_configs_using_credential = session.execute(lb_stmt).scalars().all()

            try:
                for lb_config in lb_configs_using_credential:
                    lb_credentials_cache = ProviderCredentialsCache(
                        tenant_id=self.tenant_id,
                        identity_id=lb_config.id,
                        cache_type=ProviderCredentialsCacheType.LOAD_BALANCING_MODEL,
                    )
                    lb_credentials_cache.delete()
                    session.delete(lb_config)

                # Check if this is the currently active credential
                provider_model_record = self._get_custom_model_record(model_type, model, session=session)

                # Check available credentials count BEFORE deleting
                # if this is the last credential, we need to delete the custom model record
                count_stmt = select(func.count(ProviderModelCredential.id)).where(
                    ProviderModelCredential.tenant_id == self.tenant_id,
                    ProviderModelCredential.provider_name == self.provider.provider,
                    ProviderModelCredential.model_name == model,
                    ProviderModelCredential.model_type == model_type.to_origin_model_type(),
                )
                available_credentials_count = session.execute(count_stmt).scalar() or 0
                session.delete(credential_record)

                if provider_model_record and available_credentials_count <= 1:
                    # If all credentials are deleted, delete the custom model record
                    session.delete(provider_model_record)
                elif provider_model_record and provider_model_record.credential_id == credential_id:
                    provider_model_record.credential_id = None
                    provider_model_record.updated_at = naive_utc_now()
                    provider_model_credentials_cache = ProviderCredentialsCache(
                        tenant_id=self.tenant_id,
                        identity_id=provider_model_record.id,
                        cache_type=ProviderCredentialsCacheType.PROVIDER,
                    )
                    provider_model_credentials_cache.delete()

                session.commit()

            except Exception:
                session.rollback()
                raise

    def add_model_credential_to_model(self, model_type: ModelType, model: str, credential_id: str) -> None:
        """
        if model list exist this custom model, switch the custom model credential.
        if model list not exist this custom model, use the credential to add a new custom model record.

        :param model_type: model type
        :param model: model name
        :param credential_id: credential id
        :return:
        """
        with Session(db.engine) as session:
            stmt = select(ProviderModelCredential).where(
                ProviderModelCredential.id == credential_id,
                ProviderModelCredential.tenant_id == self.tenant_id,
                ProviderModelCredential.provider_name == self.provider.provider,
                ProviderModelCredential.model_name == model,
                ProviderModelCredential.model_type == model_type.to_origin_model_type(),
            )
            credential_record = session.execute(stmt).scalar_one_or_none()
            if not credential_record:
                raise ValueError("Credential record not found.")

            # validate custom model config
            provider_model_record = self._get_custom_model_record(model_type=model_type, model=model, session=session)

            if not provider_model_record:
                # create provider model record
                provider_model_record = ProviderModel(
                    tenant_id=self.tenant_id,
                    provider_name=self.provider.provider,
                    model_name=model,
                    model_type=model_type.to_origin_model_type(),
                    is_valid=True,
                    credential_id=credential_id,
                )
            else:
                if provider_model_record.credential_id == credential_record.id:
                    raise ValueError("Can't add same credential")
                provider_model_record.credential_id = credential_record.id
                provider_model_record.updated_at = naive_utc_now()
            session.add(provider_model_record)
            session.commit()

    def switch_custom_model_credential(self, model_type: ModelType, model: str, credential_id: str) -> None:
        """
        switch the custom model credential.

        :param model_type: model type
        :param model: model name
        :param credential_id: credential id
        :return:
        """
        with Session(db.engine) as session:
            stmt = select(ProviderModelCredential).where(
                ProviderModelCredential.id == credential_id,
                ProviderModelCredential.tenant_id == self.tenant_id,
                ProviderModelCredential.provider_name == self.provider.provider,
                ProviderModelCredential.model_name == model,
                ProviderModelCredential.model_type == model_type.to_origin_model_type(),
            )
            credential_record = session.execute(stmt).scalar_one_or_none()
            if not credential_record:
                raise ValueError("Credential record not found.")

            provider_model_record = self._get_custom_model_record(model_type=model_type, model=model, session=session)
            if not provider_model_record:
                raise ValueError("The custom model record not found.")

            provider_model_record.credential_id = credential_record.id
            provider_model_record.updated_at = naive_utc_now()
            session.add(provider_model_record)
            session.commit()

    def delete_custom_model(self, model_type: ModelType, model: str) -> None:
        """
        Delete custom model.
        :param model_type: model type
        :param model: model name
        :return:
        """
        with Session(db.engine) as session:
            # get provider model
            provider_model_record = self._get_custom_model_record(model_type=model_type, model=model, session=session)

            # delete provider model
            if provider_model_record:
                session.delete(provider_model_record)
                session.commit()

                provider_model_credentials_cache = ProviderCredentialsCache(
                    tenant_id=self.tenant_id,
                    identity_id=provider_model_record.id,
                    cache_type=ProviderCredentialsCacheType.MODEL,
                )

                provider_model_credentials_cache.delete()

    def _get_provider_model_setting(
        self, model_type: ModelType, model: str, session: Session
    ) -> ProviderModelSetting | None:
        """
        Get provider model setting.
        """

        model_provider_id = ModelProviderID(self.provider.provider)
        provider_names = [self.provider.provider]
        if model_provider_id.is_langgenius():
            provider_names.append(model_provider_id.provider_name)

        stmt = select(ProviderModelSetting).where(
            ProviderModelSetting.tenant_id == self.tenant_id,
            ProviderModelSetting.provider_name.in_(provider_names),
            ProviderModelSetting.model_type == model_type.to_origin_model_type(),
            ProviderModelSetting.model_name == model,
        )
        return session.execute(stmt).scalars().first()

    def enable_model(self, model_type: ModelType, model: str) -> ProviderModelSetting:
        """
        Enable model.
        :param model_type: model type
        :param model: model name
        :return:
        """
        with Session(db.engine) as session:
            model_setting = self._get_provider_model_setting(model_type=model_type, model=model, session=session)

            if model_setting:
                model_setting.enabled = True
                model_setting.updated_at = naive_utc_now()

            else:
                model_setting = ProviderModelSetting(
                    tenant_id=self.tenant_id,
                    provider_name=self.provider.provider,
                    model_type=model_type.to_origin_model_type(),
                    model_name=model,
                    enabled=True,
                )
                session.add(model_setting)
            session.commit()

        return model_setting

    def disable_model(self, model_type: ModelType, model: str) -> ProviderModelSetting:
        """
        Disable model.
        :param model_type: model type
        :param model: model name
        :return:
        """
        with Session(db.engine) as session:
            model_setting = self._get_provider_model_setting(model_type=model_type, model=model, session=session)

            if model_setting:
                model_setting.enabled = False
                model_setting.updated_at = naive_utc_now()
            else:
                model_setting = ProviderModelSetting(
                    tenant_id=self.tenant_id,
                    provider_name=self.provider.provider,
                    model_type=model_type.to_origin_model_type(),
                    model_name=model,
                    enabled=False,
                )
                session.add(model_setting)
            session.commit()

        return model_setting

    def get_provider_model_setting(self, model_type: ModelType, model: str) -> Optional[ProviderModelSetting]:
        """
        Get provider model setting.
        :param model_type: model type
        :param model: model name
        :return:
        """
        with Session(db.engine) as session:
            return self._get_provider_model_setting(model_type=model_type, model=model, session=session)

    def enable_model_load_balancing(self, model_type: ModelType, model: str) -> ProviderModelSetting:
        """
        Enable model load balancing.
        :param model_type: model type
        :param model: model name
        :return:
        """

        model_provider_id = ModelProviderID(self.provider.provider)
        provider_names = [self.provider.provider]
        if model_provider_id.is_langgenius():
            provider_names.append(model_provider_id.provider_name)

        with Session(db.engine) as session:
            stmt = select(func.count(LoadBalancingModelConfig.id)).where(
                LoadBalancingModelConfig.tenant_id == self.tenant_id,
                LoadBalancingModelConfig.provider_name.in_(provider_names),
                LoadBalancingModelConfig.model_type == model_type.to_origin_model_type(),
                LoadBalancingModelConfig.model_name == model,
            )
            load_balancing_config_count = session.execute(stmt).scalar() or 0
            if load_balancing_config_count <= 1:
                raise ValueError("Model load balancing configuration must be more than 1.")

            model_setting = self._get_provider_model_setting(model_type=model_type, model=model, session=session)

            if model_setting:
                model_setting.load_balancing_enabled = True
                model_setting.updated_at = naive_utc_now()
            else:
                model_setting = ProviderModelSetting(
                    tenant_id=self.tenant_id,
                    provider_name=self.provider.provider,
                    model_type=model_type.to_origin_model_type(),
                    model_name=model,
                    load_balancing_enabled=True,
                )
                session.add(model_setting)
            session.commit()

        return model_setting

    def disable_model_load_balancing(self, model_type: ModelType, model: str) -> ProviderModelSetting:
        """
        Disable model load balancing.
        :param model_type: model type
        :param model: model name
        :return:
        """

        with Session(db.engine) as session:
            model_setting = self._get_provider_model_setting(model_type=model_type, model=model, session=session)

            if model_setting:
                model_setting.load_balancing_enabled = False
                model_setting.updated_at = naive_utc_now()
            else:
                model_setting = ProviderModelSetting(
                    tenant_id=self.tenant_id,
                    provider_name=self.provider.provider,
                    model_type=model_type.to_origin_model_type(),
                    model_name=model,
                    load_balancing_enabled=False,
                )
                session.add(model_setting)
            session.commit()

        return model_setting

    def get_model_type_instance(self, model_type: ModelType) -> AIModel:
        """
        Get current model type instance.

        :param model_type: model type
        :return:
        """
        model_provider_factory = ModelProviderFactory(self.tenant_id)

        # Get model instance of LLM
        return model_provider_factory.get_model_type_instance(provider=self.provider.provider, model_type=model_type)

    def get_model_schema(self, model_type: ModelType, model: str, credentials: dict | None) -> AIModelEntity | None:
        """
        Get model schema
        """
        model_provider_factory = ModelProviderFactory(self.tenant_id)
        return model_provider_factory.get_model_schema(
            provider=self.provider.provider, model_type=model_type, model=model, credentials=credentials
        )

    def switch_preferred_provider_type(self, provider_type: ProviderType, session: Session | None = None) -> None:
        """
        Switch preferred provider type.
        :param provider_type:
        :return:
        """
        if provider_type == self.preferred_provider_type:
            return

        if provider_type == ProviderType.SYSTEM and not self.system_configuration.enabled:
            return

        def _switch(s: Session) -> None:
            # get preferred provider
            model_provider_id = ModelProviderID(self.provider.provider)
            provider_names = [self.provider.provider]
            if model_provider_id.is_langgenius():
                provider_names.append(model_provider_id.provider_name)

            stmt = select(TenantPreferredModelProvider).where(
                TenantPreferredModelProvider.tenant_id == self.tenant_id,
                TenantPreferredModelProvider.provider_name.in_(provider_names),
            )
            preferred_model_provider = s.execute(stmt).scalars().first()

            if preferred_model_provider:
                preferred_model_provider.preferred_provider_type = provider_type.value
            else:
                preferred_model_provider = TenantPreferredModelProvider(
                    tenant_id=self.tenant_id,
                    provider_name=self.provider.provider,
                    preferred_provider_type=provider_type.value,
                )
                s.add(preferred_model_provider)
            s.commit()

        if session:
            return _switch(session)
        else:
            with Session(db.engine) as session:
                return _switch(session)

    def extract_secret_variables(self, credential_form_schemas: list[CredentialFormSchema]) -> list[str]:
        """
        Extract secret input form variables.

        :param credential_form_schemas:
        :return:
        """
        secret_input_form_variables = []
        for credential_form_schema in credential_form_schemas:
            if credential_form_schema.type == FormType.SECRET_INPUT:
                secret_input_form_variables.append(credential_form_schema.variable)

        return secret_input_form_variables

    def obfuscated_credentials(self, credentials: dict, credential_form_schemas: list[CredentialFormSchema]) -> dict:
        """
        Obfuscated credentials.

        :param credentials: credentials
        :param credential_form_schemas: credential form schemas
        :return:
        """
        # Get provider credential secret variables
        credential_secret_variables = self.extract_secret_variables(credential_form_schemas)

        # Obfuscate provider credentials
        copy_credentials = credentials.copy()
        for key, value in copy_credentials.items():
            if key in credential_secret_variables:
                copy_credentials[key] = encrypter.obfuscated_token(value)

        return copy_credentials

    def get_provider_model(
        self, model_type: ModelType, model: str, only_active: bool = False
    ) -> Optional[ModelWithProviderEntity]:
        """
        Get provider model.
        :param model_type: model type
        :param model: model name
        :param only_active: return active model only
        :return:
        """
        provider_models = self.get_provider_models(model_type, only_active, model)

        for provider_model in provider_models:
            if provider_model.model == model:
                return provider_model

        return None

    def get_provider_models(
        self, model_type: Optional[ModelType] = None, only_active: bool = False, model: Optional[str] = None
    ) -> list[ModelWithProviderEntity]:
        """
        Get provider models.
        :param model_type: model type
        :param only_active: only active models
        :param model: model name
        :return:
        """
        model_provider_factory = ModelProviderFactory(self.tenant_id)
        provider_schema = model_provider_factory.get_provider_schema(self.provider.provider)

        model_types: list[ModelType] = []
        if model_type:
            model_types.append(model_type)
        else:
            model_types = list(provider_schema.supported_model_types)

        # Group model settings by model type and model
        model_setting_map: defaultdict[ModelType, dict[str, ModelSettings]] = defaultdict(dict)
        for model_setting in self.model_settings:
            model_setting_map[model_setting.model_type][model_setting.model] = model_setting

        if self.using_provider_type == ProviderType.SYSTEM:
            provider_models = self._get_system_provider_models(
                model_types=model_types, provider_schema=provider_schema, model_setting_map=model_setting_map
            )
        else:
            provider_models = self._get_custom_provider_models(
                model_types=model_types,
                provider_schema=provider_schema,
                model_setting_map=model_setting_map,
                model=model,
            )

        if only_active:
            provider_models = [m for m in provider_models if m.status == ModelStatus.ACTIVE]

        # resort provider_models
        # Optimize sorting logic: first sort by provider.position order, then by model_type.value
        # Get the position list for model types (retrieve only once for better performance)
        model_type_positions = {}
        if hasattr(self.provider, "position") and self.provider.position:
            model_type_positions = self.provider.position

        def get_sort_key(model: ModelWithProviderEntity):
            # Get the position list for the current model type
            positions = model_type_positions.get(model.model_type.value, [])

            # If the model name is in the position list, use its index for sorting
            # Otherwise use a large value (list length) to place undefined models at the end
            position_index = positions.index(model.model) if model.model in positions else len(positions)

            # Return composite sort key: (model_type value, model position index)
            return (model.model_type.value, position_index)

        # Sort using the composite sort key
        return sorted(provider_models, key=get_sort_key)

    def _get_system_provider_models(
        self,
        model_types: Sequence[ModelType],
        provider_schema: ProviderEntity,
        model_setting_map: dict[ModelType, dict[str, ModelSettings]],
    ) -> list[ModelWithProviderEntity]:
        """
        Get system provider models.

        :param model_types: model types
        :param provider_schema: provider schema
        :param model_setting_map: model setting map
        :return:
        """
        provider_models = []
        for model_type in model_types:
            for m in provider_schema.models:
                if m.model_type != model_type:
                    continue

                status = ModelStatus.ACTIVE
                if m.model_type in model_setting_map and m.model in model_setting_map[m.model_type]:
                    model_setting = model_setting_map[m.model_type][m.model]
                    if model_setting.enabled is False:
                        status = ModelStatus.DISABLED

                provider_models.append(
                    ModelWithProviderEntity(
                        model=m.model,
                        label=m.label,
                        model_type=m.model_type,
                        features=m.features,
                        fetch_from=m.fetch_from,
                        model_properties=m.model_properties,
                        deprecated=m.deprecated,
                        provider=SimpleModelProviderEntity(self.provider),
                        status=status,
                    )
                )

        if self.provider.provider not in original_provider_configurate_methods:
            original_provider_configurate_methods[self.provider.provider] = []
            for configurate_method in provider_schema.configurate_methods:
                original_provider_configurate_methods[self.provider.provider].append(configurate_method)

        should_use_custom_model = False
        if original_provider_configurate_methods[self.provider.provider] == [ConfigurateMethod.CUSTOMIZABLE_MODEL]:
            should_use_custom_model = True

        for quota_configuration in self.system_configuration.quota_configurations:
            if self.system_configuration.current_quota_type != quota_configuration.quota_type:
                continue

            restrict_models = quota_configuration.restrict_models
            if len(restrict_models) == 0:
                break

            if should_use_custom_model:
                if original_provider_configurate_methods[self.provider.provider] == [
                    ConfigurateMethod.CUSTOMIZABLE_MODEL
                ]:
                    # only customizable model
                    for restrict_model in restrict_models:
                        copy_credentials = (
                            self.system_configuration.credentials.copy()
                            if self.system_configuration.credentials
                            else {}
                        )
                        if restrict_model.base_model_name:
                            copy_credentials["base_model_name"] = restrict_model.base_model_name

                        try:
                            custom_model_schema = self.get_model_schema(
                                model_type=restrict_model.model_type,
                                model=restrict_model.model,
                                credentials=copy_credentials,
                            )
                        except Exception as ex:
                            logger.warning("get custom model schema failed, %s", ex)
                            continue

                        if not custom_model_schema:
                            continue

                        if custom_model_schema.model_type not in model_types:
                            continue

                        status = ModelStatus.ACTIVE
                        if (
                            custom_model_schema.model_type in model_setting_map
                            and custom_model_schema.model in model_setting_map[custom_model_schema.model_type]
                        ):
                            model_setting = model_setting_map[custom_model_schema.model_type][custom_model_schema.model]
                            if model_setting.enabled is False:
                                status = ModelStatus.DISABLED

                        provider_models.append(
                            ModelWithProviderEntity(
                                model=custom_model_schema.model,
                                label=custom_model_schema.label,
                                model_type=custom_model_schema.model_type,
                                features=custom_model_schema.features,
                                fetch_from=FetchFrom.PREDEFINED_MODEL,
                                model_properties=custom_model_schema.model_properties,
                                deprecated=custom_model_schema.deprecated,
                                provider=SimpleModelProviderEntity(self.provider),
                                status=status,
                            )
                        )

            # if llm name not in restricted llm list, remove it
            restrict_model_names = [rm.model for rm in restrict_models]
            for model in provider_models:
                if model.model_type == ModelType.LLM and model.model not in restrict_model_names:
                    model.status = ModelStatus.NO_PERMISSION
                elif not quota_configuration.is_valid:
                    model.status = ModelStatus.QUOTA_EXCEEDED

        return provider_models

    def _get_custom_provider_models(
        self,
        model_types: Sequence[ModelType],
        provider_schema: ProviderEntity,
        model_setting_map: dict[ModelType, dict[str, ModelSettings]],
        model: Optional[str] = None,
    ) -> list[ModelWithProviderEntity]:
        """
        Get custom provider models.

        :param model_types: model types
        :param provider_schema: provider schema
        :param model_setting_map: model setting map
        :return:
        """
        provider_models = []

        credentials = None
        if self.custom_configuration.provider:
            credentials = self.custom_configuration.provider.credentials

        for model_type in model_types:
            if model_type not in self.provider.supported_model_types:
                continue

            for m in provider_schema.models:
                if m.model_type != model_type:
                    continue

                status = ModelStatus.ACTIVE if credentials else ModelStatus.NO_CONFIGURE
                load_balancing_enabled = False
                has_invalid_load_balancing_configs = False
                if m.model_type in model_setting_map and m.model in model_setting_map[m.model_type]:
                    model_setting = model_setting_map[m.model_type][m.model]
                    if model_setting.enabled is False:
                        status = ModelStatus.DISABLED

                    provider_model_lb_configs = [
                        config
                        for config in model_setting.load_balancing_configs
                        if config.credential_source_type != "custom_model"
                    ]

                    load_balancing_enabled = model_setting.load_balancing_enabled
                    # when the user enable load_balancing but available configs are less than 2 display warning
                    has_invalid_load_balancing_configs = load_balancing_enabled and len(provider_model_lb_configs) < 2

                provider_models.append(
                    ModelWithProviderEntity(
                        model=m.model,
                        label=m.label,
                        model_type=m.model_type,
                        features=m.features,
                        fetch_from=m.fetch_from,
                        model_properties=m.model_properties,
                        deprecated=m.deprecated,
                        provider=SimpleModelProviderEntity(self.provider),
                        status=status,
                        load_balancing_enabled=load_balancing_enabled,
                        has_invalid_load_balancing_configs=has_invalid_load_balancing_configs,
                    )
                )

        # custom models
        for model_configuration in self.custom_configuration.models:
            if model_configuration.model_type not in model_types:
                continue
            if model_configuration.unadded_to_model_list:
                continue
            if model and model != model_configuration.model:
                continue
            try:
                custom_model_schema = self.get_model_schema(
                    model_type=model_configuration.model_type,
                    model=model_configuration.model,
                    credentials=model_configuration.credentials,
                )
            except Exception as ex:
                logger.warning("get custom model schema failed, %s", ex)
                continue

            if not custom_model_schema:
                continue

            status = ModelStatus.ACTIVE
            load_balancing_enabled = False
            has_invalid_load_balancing_configs = False
            if (
                custom_model_schema.model_type in model_setting_map
                and custom_model_schema.model in model_setting_map[custom_model_schema.model_type]
            ):
                model_setting = model_setting_map[custom_model_schema.model_type][custom_model_schema.model]
                if model_setting.enabled is False:
                    status = ModelStatus.DISABLED

                custom_model_lb_configs = [
                    config
                    for config in model_setting.load_balancing_configs
                    if config.credential_source_type != "provider"
                ]

                load_balancing_enabled = model_setting.load_balancing_enabled
                # when the user enable load_balancing but available configs are less than 2 display warning
                has_invalid_load_balancing_configs = load_balancing_enabled and len(custom_model_lb_configs) < 2

            if len(model_configuration.available_model_credentials) > 0 and not model_configuration.credentials:
                status = ModelStatus.CREDENTIAL_REMOVED

            provider_models.append(
                ModelWithProviderEntity(
                    model=custom_model_schema.model,
                    label=custom_model_schema.label,
                    model_type=custom_model_schema.model_type,
                    features=custom_model_schema.features,
                    fetch_from=FetchFrom.CUSTOMIZABLE_MODEL,
                    model_properties=custom_model_schema.model_properties,
                    deprecated=custom_model_schema.deprecated,
                    provider=SimpleModelProviderEntity(self.provider),
                    status=status,
                    load_balancing_enabled=load_balancing_enabled,
                    has_invalid_load_balancing_configs=has_invalid_load_balancing_configs,
                )
            )

        return provider_models


class ProviderConfigurations(BaseModel):
    """
    Model class for provider configuration dict.
    """

    tenant_id: str
    configurations: dict[str, ProviderConfiguration] = Field(default_factory=dict)

    def __init__(self, tenant_id: str):
        super().__init__(tenant_id=tenant_id)

    def get_models(
        self, provider: Optional[str] = None, model_type: Optional[ModelType] = None, only_active: bool = False
    ) -> list[ModelWithProviderEntity]:
        """
        Get available models.

        If preferred provider type is `system`:
          Get the current **system mode** if provider supported,
          if all system modes are not available (no quota), it is considered to be the **custom credential mode**.
          If there is no model configured in custom mode, it is treated as no_configure.
        system > custom > no_configure

        If preferred provider type is `custom`:
          If custom credentials are configured, it is treated as custom mode.
          Otherwise, get the current **system mode** if supported,
          If all system modes are not available (no quota), it is treated as no_configure.
        custom > system > no_configure

        If real mode is `system`, use system credentials to get models,
          paid quotas > provider free quotas > system free quotas
          include pre-defined models (exclude GPT-4, status marked as `no_permission`).
        If real mode is `custom`, use workspace custom credentials to get models,
          include pre-defined models, custom models(manual append).
        If real mode is `no_configure`, only return pre-defined models from `model runtime`.
          (model status marked as `no_configure` if preferred provider type is `custom` otherwise `quota_exceeded`)
        model status marked as `active` is available.

        :param provider: provider name
        :param model_type: model type
        :param only_active: only active models
        :return:
        """
        all_models = []
        for provider_configuration in self.values():
            if provider and provider_configuration.provider.provider != provider:
                continue

            all_models.extend(provider_configuration.get_provider_models(model_type, only_active))

        return all_models

    def to_list(self) -> list[ProviderConfiguration]:
        """
        Convert to list.

        :return:
        """
        return list(self.values())

    def __getitem__(self, key):
        if "/" not in key:
            key = str(ModelProviderID(key))

        return self.configurations[key]

    def __setitem__(self, key, value):
        self.configurations[key] = value

    def __iter__(self):
        return iter(self.configurations)

    def values(self) -> Iterator[ProviderConfiguration]:
        return iter(self.configurations.values())

    def get(self, key, default=None) -> ProviderConfiguration | None:
        if "/" not in key:
            key = str(ModelProviderID(key))

        return self.configurations.get(key, default)  # type: ignore


class ProviderModelBundle(BaseModel):
    """
    Provider model bundle.
    """

    configuration: ProviderConfiguration
    model_type_instance: AIModel

    # pydantic configs
    model_config = ConfigDict(arbitrary_types_allowed=True, protected_namespaces=())
