import json
import logging

from fastapi import APIRouter, Depends, Request, status
from fastapi.responses import PlainTextResponse, Response
from pydantic import ValidationError
from sqlalchemy.orm import Session

from app.config import Settings
from app.dependencies import get_app_settings, get_homeassistant_client, get_poo_db
from app.integrations.homeassistant import HomeAssistantClient
from app.schemas.poo import PooRecordRequest
from app.services.poo import publish_latest_poo_status, record_poo

router = APIRouter(tags=["poo"])
logger = logging.getLogger(__name__)
BAD_REQUEST_MESSAGE = "bad request"
INTERNAL_SERVER_ERROR_MESSAGE = "internal server error"


@router.post("/poo/record")
async def create_poo_record(
    request: Request,
    db: Session = Depends(get_poo_db),
    settings: Settings = Depends(get_app_settings),
    homeassistant_client: HomeAssistantClient = Depends(get_homeassistant_client),
) -> Response:
    try:
        raw_payload = await request.body()
        data = json.loads(raw_payload)
        payload = PooRecordRequest.model_validate(data)
        record_poo(
            db,
            payload,
            settings=settings,
            homeassistant_client=homeassistant_client,
        )
    except json.JSONDecodeError as exc:
        logger.warning("Rejected poo record request due to invalid JSON: %s", exc)
        return PlainTextResponse(BAD_REQUEST_MESSAGE, status_code=status.HTTP_400_BAD_REQUEST)
    except ValidationError as exc:
        logger.warning("Rejected poo record request due to validation failure: %s", exc)
        return PlainTextResponse(BAD_REQUEST_MESSAGE, status_code=status.HTTP_400_BAD_REQUEST)
    except ValueError as exc:
        logger.warning("Rejected poo record request due to invalid numeric input: %s", exc)
        return PlainTextResponse(BAD_REQUEST_MESSAGE, status_code=status.HTTP_400_BAD_REQUEST)
    except Exception as exc:
        logger.warning("Failed to store poo record: %s", exc)
        return PlainTextResponse(
            INTERNAL_SERVER_ERROR_MESSAGE,
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
        )

    return Response(status_code=status.HTTP_200_OK)


@router.get("/poo/latest")
def notify_latest_poo(
    db: Session = Depends(get_poo_db),
    settings: Settings = Depends(get_app_settings),
    homeassistant_client: HomeAssistantClient = Depends(get_homeassistant_client),
) -> Response:
    try:
        publish_latest_poo_status(
            session=db,
            settings=settings,
            homeassistant_client=homeassistant_client,
        )
    except Exception as exc:
        logger.warning("Failed to publish latest poo status: %s", exc)
        return PlainTextResponse(
            INTERNAL_SERVER_ERROR_MESSAGE,
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
        )

    return Response(status_code=status.HTTP_200_OK)