from fastapi import APIRouter, Depends, HTTPException, Query
from datetime import datetime
from psycopg import AsyncConnection

from app.infra.db.timescaledb.composite_queries import CompositeQueries
from .dependencies import get_timescale_connection, get_postgres_connection

router = APIRouter()


@router.get("/composite/scada-simulation")
async def get_scada_associated_simulation_data(
    start_time: datetime,
    end_time: datetime,
    device_ids: str,
    scheme_type: str = Query(None, description="指定方案名称，若为空则查询实时数据"),
    scheme_name: str = Query(None, description="指定方案名称，若为空则查询实时数据"),
    timescale_conn: AsyncConnection = Depends(get_timescale_connection),
    postgres_conn: AsyncConnection = Depends(get_postgres_connection),
):
    """
    获取 SCADA 关联的 link/node 模拟值

    根据传入的 SCADA device_ids，找到关联的 link/node，
    并根据对应的 type，查询对应的模拟数据
    """
    try:
        device_ids_list = (
            [id.strip() for id in device_ids.split(",") if id.strip()]
            if device_ids
            else []
        )

        if scheme_type and scheme_name:
            result = await CompositeQueries.get_scada_associated_scheme_simulation_data(
                timescale_conn,
                postgres_conn,
                device_ids_list,
                start_time,
                end_time,
                scheme_type,
                scheme_name,
            )
        else:
            result = (
                await CompositeQueries.get_scada_associated_realtime_simulation_data(
                    timescale_conn,
                    postgres_conn,
                    device_ids_list,
                    start_time,
                    end_time,
                )
            )
        if result is None:
            raise HTTPException(status_code=404, detail="No simulation data found")
        return result
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))


@router.get("/composite/element-simulation")
async def get_feature_simulation_data(
    start_time: datetime,
    end_time: datetime,
    feature_infos: str = Query(
        ..., description="特征信息，格式: id1:type1,id2:type2，type为pipe或junction"
    ),
    scheme_type: str = Query(None, description="指定方案类型，若为空则查询实时数据"),
    scheme_name: str = Query(None, description="指定方案名称，若为空则查询实时数据"),
    timescale_conn: AsyncConnection = Depends(get_timescale_connection),
):
    """
    获取 link/node 模拟值

    根据传入的 featureInfos，找到关联的 link/node，
    并根据对应的 type，查询对应的模拟数据

    Args:
        feature_infos: 格式为 "element_id1:type1,element_id2:type2"
                      例如: "P1:pipe,J1:junction"
    """
    try:
        feature_infos_list = []
        if feature_infos:
            for item in feature_infos.split(","):
                item = item.strip()
                if ":" in item:
                    element_id, element_type = item.split(":", 1)
                    feature_infos_list.append(
                        (element_id.strip(), element_type.strip())
                    )

        if not feature_infos_list:
            raise HTTPException(status_code=400, detail="feature_infos cannot be empty")

        if scheme_type and scheme_name:
            result = await CompositeQueries.get_scheme_simulation_data(
                timescale_conn,
                feature_infos_list,
                start_time,
                end_time,
                scheme_type,
                scheme_name,
            )
        else:
            result = await CompositeQueries.get_realtime_simulation_data(
                timescale_conn,
                feature_infos_list,
                start_time,
                end_time,
            )

        if result is None:
            raise HTTPException(status_code=404, detail="No simulation data found")
        return result
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))


@router.get("/composite/element-scada")
async def get_element_associated_scada_data(
    element_id: str,
    start_time: datetime,
    end_time: datetime,
    use_cleaned: bool = Query(False, description="是否使用清洗后的数据"),
    timescale_conn: AsyncConnection = Depends(get_timescale_connection),
    postgres_conn: AsyncConnection = Depends(get_postgres_connection),
):
    """
    获取 link/node 关联的 SCADA 监测值

    根据传入的 link/node id，匹配 SCADA 信息，
    如果存在关联的 SCADA device_id，获取实际的监测数据
    """
    try:
        result = await CompositeQueries.get_element_associated_scada_data(
            timescale_conn, postgres_conn, element_id, start_time, end_time, use_cleaned
        )
        if result is None:
            raise HTTPException(
                status_code=404, detail="No associated SCADA data found"
            )
        return result
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))


@router.post("/composite/clean-scada")
async def clean_scada_data(
    device_ids: str,
    start_time: datetime = Query(...),
    end_time: datetime = Query(...),
    timescale_conn: AsyncConnection = Depends(get_timescale_connection),
    postgres_conn: AsyncConnection = Depends(get_postgres_connection),
):
    """
    清洗 SCADA 数据

    根据 device_ids 查询 monitored_value，清洗后更新 cleaned_value
    """
    try:
        if device_ids == "all":
            device_ids_list = []
        else:
            device_ids_list = (
                [id.strip() for id in device_ids.split(",") if id.strip()]
                if device_ids
                else []
            )
        return await CompositeQueries.clean_scada_data(
            timescale_conn, postgres_conn, device_ids_list, start_time, end_time
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))


@router.get("/composite/pipeline-health-prediction")
async def predict_pipeline_health(
    query_time: datetime = Query(..., description="查询时间"),
    network_name: str = Query(..., description="管网数据库名称"),
    timescale_conn: AsyncConnection = Depends(get_timescale_connection),
):
    """
    预测管道健康状况

    根据管网名称和当前时间，查询管道信息和实时数据，
    使用随机生存森林模型预测管道的生存概率

    Args:
        query_time: 查询时间
        db_name: 管网数据库名称

    Returns:
        预测结果列表，每个元素包含 link_id 和对应的生存函数
    """
    try:
        return await CompositeQueries.predict_pipeline_health(
            timescale_conn, network_name, query_time
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e))
    except FileNotFoundError as e:
        raise HTTPException(status_code=404, detail=str(e))
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"内部服务器错误: {str(e)}")