#
#  Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License
#
import logging
from datetime import datetime
import json

from api.apps import login_required

from api.db.services.knowledgebase_service import KnowledgebaseService
from api.utils.api_utils import (
    get_json_result,
)

from timeit import default_timer as timer

from rag.utils.redis_conn import REDIS_CONN
from api.utils.health_utils import get_oceanbase_status
from common import settings

@manager.route("/status", methods=["GET"])  # noqa: F821
@login_required
def status():
    """
    Get the system status.
    ---
    tags:
      - System
    security:
      - ApiKeyAuth: []
    responses:
      200:
        description: System is operational.
        schema:
          type: object
          properties:
            es:
              type: object
              description: Elasticsearch status.
            storage:
              type: object
              description: Storage status.
            database:
              type: object
              description: Database status.
      503:
        description: Service unavailable.
        schema:
          type: object
          properties:
            error:
              type: string
              description: Error message.
    """
    res = {}
    st = timer()
    try:
        res["doc_engine"] = settings.docStoreConn.health()
        res["doc_engine"]["elapsed"] = "{:.1f}".format((timer() - st) * 1000.0)
    except Exception as e:
        res["doc_engine"] = {
            "type": "unknown",
            "status": "red",
            "elapsed": "{:.1f}".format((timer() - st) * 1000.0),
            "error": str(e),
        }

    st = timer()
    try:
        settings.STORAGE_IMPL.health()
        res["storage"] = {
            "storage": settings.STORAGE_IMPL_TYPE.lower(),
            "status": "green",
            "elapsed": "{:.1f}".format((timer() - st) * 1000.0),
        }
    except Exception as e:
        res["storage"] = {
            "storage": settings.STORAGE_IMPL_TYPE.lower(),
            "status": "red",
            "elapsed": "{:.1f}".format((timer() - st) * 1000.0),
            "error": str(e),
        }

    st = timer()
    try:
        KnowledgebaseService.get_by_id("x")
        res["database"] = {
            "database": settings.DATABASE_TYPE.lower(),
            "status": "green",
            "elapsed": "{:.1f}".format((timer() - st) * 1000.0),
        }
    except Exception as e:
        res["database"] = {
            "database": settings.DATABASE_TYPE.lower(),
            "status": "red",
            "elapsed": "{:.1f}".format((timer() - st) * 1000.0),
            "error": str(e),
        }

    st = timer()
    try:
        if not REDIS_CONN.health():
            raise Exception("Lost connection!")
        res["redis"] = {
            "status": "green",
            "elapsed": "{:.1f}".format((timer() - st) * 1000.0),
        }
    except Exception as e:
        res["redis"] = {
            "status": "red",
            "elapsed": "{:.1f}".format((timer() - st) * 1000.0),
            "error": str(e),
        }

    task_executor_heartbeats = {}
    try:
        task_executors = REDIS_CONN.smembers("TASKEXE")
        now = datetime.now().timestamp()
        for task_executor_id in task_executors:
            heartbeats = REDIS_CONN.zrangebyscore(task_executor_id, now - 60 * 30, now)
            heartbeats = [json.loads(heartbeat) for heartbeat in heartbeats]
            task_executor_heartbeats[task_executor_id] = heartbeats
    except Exception:
        logging.exception("get task executor heartbeats failed!")
    res["task_executor_heartbeats"] = task_executor_heartbeats

    return get_json_result(data=res)

@manager.route("/oceanbase/status", methods=["GET"])  # noqa: F821
@login_required
def oceanbase_status():
    """
    Get OceanBase health status and performance metrics.
    ---
    tags:
      - System
    security:
      - ApiKeyAuth: []
    responses:
      200:
        description: OceanBase status retrieved successfully.
        schema:
          type: object
          properties:
            status:
              type: string
              description: Status (alive/timeout).
            message:
              type: object
              description: Detailed status information including health and performance metrics.
    """
    try:
        status_info = get_oceanbase_status()
        return get_json_result(data=status_info)
    except Exception as e:
        return get_json_result(
            data={
                "status": "error",
                "message": f"Failed to get OceanBase status: {str(e)}"
            },
            code=500
        )


@manager.route("/config", methods=["GET"])  # noqa: F821
def get_config():
    """
    Get system configuration.
    ---
    tags:
        - System
    responses:
        200:
            description: Return system configuration
            schema:
                type: object
                properties:
                    registerEnable:
                        type: integer 0 means disabled, 1 means enabled
                        description: Whether user registration is enabled
    """
    return get_json_result(data={
        "registerEnabled": settings.REGISTER_ENABLED,
        "disablePasswordLogin": settings.DISABLE_PASSWORD_LOGIN,
    })