"""
Domain entities for workflow node execution.

This module contains the domain model for workflow node execution, which is used
by the core workflow module. These models are independent of the storage mechanism
and don't contain implementation details like tenant_id, app_id, etc.
"""

from collections.abc import Mapping
from datetime import datetime
from typing import Any

from pydantic import BaseModel, Field, PrivateAttr

from dify_graph.enums import NodeType, WorkflowNodeExecutionMetadataKey, WorkflowNodeExecutionStatus


class WorkflowNodeExecution(BaseModel):
    """
    Domain model for workflow node execution.

    This model represents the core business entity of a node execution,
    without implementation details like tenant_id, app_id, etc.

    Note: User/context-specific fields (triggered_from, created_by, created_by_role)
    have been moved to the repository implementation to keep the domain model clean.
    These fields are still accepted in the constructor for backward compatibility,
    but they are not stored in the model.
    """

    # --------- Core identification fields ---------

    # Unique identifier for this execution record, used when persisting to storage.
    # Value is a UUID string (e.g., '09b3e04c-f9ae-404c-ad82-290b8d7bd382').
    id: str

    # Optional secondary ID for cross-referencing purposes.
    #
    # NOTE: For referencing the persisted record, use `id` rather than `node_execution_id`.
    # While `node_execution_id` may sometimes be a UUID string, this is not guaranteed.
    # In most scenarios, `id` should be used as the primary identifier.
    node_execution_id: str | None = None
    workflow_id: str  # ID of the workflow this node belongs to
    workflow_execution_id: str | None = None  # ID of the specific workflow run (null for single-step debugging)
    # --------- Core identification fields ends ---------

    # Execution positioning and flow
    index: int  # Sequence number for ordering in trace visualization
    predecessor_node_id: str | None = None  # ID of the node that executed before this one
    node_id: str  # ID of the node being executed
    node_type: NodeType  # Type of node (e.g., start, llm, knowledge)
    title: str  # Display title of the node

    # Execution data
    # The `inputs` and `outputs` fields hold the full content
    inputs: Mapping[str, Any] | None = None  # Input variables used by this node
    process_data: Mapping[str, Any] | None = None  # Intermediate processing data
    outputs: Mapping[str, Any] | None = None  # Output variables produced by this node

    # Execution state
    status: WorkflowNodeExecutionStatus = WorkflowNodeExecutionStatus.RUNNING  # Current execution status
    error: str | None = None  # Error message if execution failed
    elapsed_time: float = Field(default=0.0)  # Time taken for execution in seconds

    # Additional metadata
    metadata: Mapping[WorkflowNodeExecutionMetadataKey, Any] | None = None  # Execution metadata (tokens, cost, etc.)

    # Timing information
    created_at: datetime  # When execution started
    finished_at: datetime | None = None  # When execution completed

    _truncated_inputs: Mapping[str, Any] | None = PrivateAttr(None)
    _truncated_outputs: Mapping[str, Any] | None = PrivateAttr(None)
    _truncated_process_data: Mapping[str, Any] | None = PrivateAttr(None)

    def get_truncated_inputs(self) -> Mapping[str, Any] | None:
        return self._truncated_inputs

    def get_truncated_outputs(self) -> Mapping[str, Any] | None:
        return self._truncated_outputs

    def get_truncated_process_data(self) -> Mapping[str, Any] | None:
        return self._truncated_process_data

    def set_truncated_inputs(self, truncated_inputs: Mapping[str, Any] | None):
        self._truncated_inputs = truncated_inputs

    def set_truncated_outputs(self, truncated_outputs: Mapping[str, Any] | None):
        self._truncated_outputs = truncated_outputs

    def set_truncated_process_data(self, truncated_process_data: Mapping[str, Any] | None):
        self._truncated_process_data = truncated_process_data

    def get_response_inputs(self) -> Mapping[str, Any] | None:
        inputs = self.get_truncated_inputs()
        if inputs:
            return inputs
        return self.inputs

    @property
    def inputs_truncated(self):
        return self._truncated_inputs is not None

    @property
    def outputs_truncated(self):
        return self._truncated_outputs is not None

    @property
    def process_data_truncated(self):
        return self._truncated_process_data is not None

    def get_response_outputs(self) -> Mapping[str, Any] | None:
        outputs = self.get_truncated_outputs()
        if outputs is not None:
            return outputs
        return self.outputs

    def get_response_process_data(self) -> Mapping[str, Any] | None:
        process_data = self.get_truncated_process_data()
        if process_data is not None:
            return process_data
        return self.process_data

    def update_from_mapping(
        self,
        inputs: Mapping[str, Any] | None = None,
        process_data: Mapping[str, Any] | None = None,
        outputs: Mapping[str, Any] | None = None,
        metadata: Mapping[WorkflowNodeExecutionMetadataKey, Any] | None = None,
    ):
        """
        Update the model from mappings.

        Args:
            inputs: The inputs to update
            process_data: The process data to update
            outputs: The outputs to update
            metadata: The metadata to update
        """
        if inputs is not None:
            self.inputs = dict(inputs)
        if process_data is not None:
            self.process_data = dict(process_data)
        if outputs is not None:
            self.outputs = dict(outputs)
        if metadata is not None:
            self.metadata = dict(metadata)