#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import json
import logging
from typing import Optional
from ipaddress import IPv4Address

import uvicorn
from starlette.websockets import WebSocketDisconnect
from fastapi import Body, FastAPI, WebSocket

from nonebot.log import logger
from nonebot.config import Config
from nonebot.drivers import BaseDriver
from nonebot.adapters.coolq import Bot as CoolQBot


class Driver(BaseDriver):

    def __init__(self, config: Config):
        self._server_app = FastAPI(
            debug=config.debug,
            openapi_url=None,
            docs_url=None,
            redoc_url=None,
        )

        self.config = config

        self._server_app.post("/{adapter}/")(self._handle_http)
        self._server_app.post("/{adapter}/http")(self._handle_http)
        self._server_app.websocket("/{adapter}/ws")(self._handle_ws_reverse)
        self._server_app.websocket("/{adapter}/ws/")(self._handle_ws_reverse)

    @property
    def server_app(self):
        return self._server_app

    @property
    def asgi(self):
        return self._server_app

    @property
    def logger(self):
        return logging.getLogger("fastapi")

    def run(self,
            host: Optional[IPv4Address] = None,
            port: Optional[int] = None,
            *,
            app: Optional[str] = None,
            **kwargs):
        LOGGING_CONFIG = {
            "version": 1,
            "disable_existing_loggers": False,
            "formatters": {
                "default": {
                    "()": "logging.Formatter",
                    "fmt": "[%(asctime)s %(name)s] %(levelname)s: %(message)s",
                },
            },
            "handlers": {
                "default": {
                    "formatter": "default",
                    "class": "logging.StreamHandler",
                    "stream": "ext://sys.stdout",
                },
            },
            "loggers": {
                "uvicorn.error": {
                    "handlers": ["default"],
                    "level": "INFO"
                },
                "uvicorn.access": {
                    "handlers": ["default"],
                    "level": "INFO",
                },
            },
        }
        uvicorn.run(app or self.server_app,
                    host=host or str(self.config.host),
                    port=port or self.config.port,
                    reload=app and self.config.debug,
                    debug=self.config.debug,
                    log_config=LOGGING_CONFIG,
                    **kwargs)

    async def _handle_http(self, adapter: str, data: dict = Body(...)):
        # TODO: Check authorization
        logger.debug(f"Received message: {data}")
        if adapter == "coolq":
            bot = CoolQBot("http", self.config)
            await bot.handle_message(data)
        return {"status": 200, "message": "success"}

    async def _handle_ws_reverse(self, adapter: str, websocket: WebSocket):
        # TODO: Check authorization
        await websocket.accept()
        while True:
            try:
                data = await websocket.receive_json()
            except json.decoder.JSONDecodeError as e:
                logger.exception(e)
                continue
            except WebSocketDisconnect:
                logger.error("WebSocket Disconnect")
                return

            logger.debug(f"Received message: {data}")
            if adapter == "coolq":
                bot = CoolQBot("websocket", self.config, websocket=websocket)
                await bot.handle_message(data)