import json
from typing import Dict, List

from fastapi import WebSocket, Depends, WebSocketDisconnect
from pydantic import parse_obj_as

from app.users.chat.dao import ChatDAO
from app.users.auth import validate_user_access_to_chat
from app.users.chat.shemas import SMessageSchema, SMessage
from app.users.models import Users
from app.users.chat.router import router


class ConnectionManager(WebSocket):
    def __init__(self):
        self.active_connections: dict[int, list[WebSocket]] = {}

    async def connect(self, chat_id: int, websocket: WebSocket):
        await websocket.accept()
        if chat_id not in self.active_connections:
            self.active_connections[chat_id] = []
        self.active_connections[chat_id].append(websocket)

    def disconnect(self, chat_id: int, websocket: WebSocket):
        self.active_connections[chat_id].remove(websocket)

    async def broadcast(self, user_id: int, chat_id: int, message: str):
        new_message = await self.add_message_to_database(user_id=user_id, chat_id=chat_id, message=message)
        new_message = dict(new_message)
        new_message['created_at'] = new_message['created_at'].isoformat()
        for websocket in self.active_connections[chat_id]:
            await websocket.send_json(new_message)

    @staticmethod
    async def add_message_to_database(user_id: int, chat_id: int, message: str):
        result = await ChatDAO.send_message(user_id=user_id, chat_id=chat_id, message=message)
        new_message = await ChatDAO.get_message_by_id(message_id=result)
        return new_message


manager = ConnectionManager()


@router.websocket("/ws/{chat_id}")
async def websocket_endpoint(chat_id: int, user_id: int, websocket: WebSocket):
    await validate_user_access_to_chat(user_id=user_id, chat_id=chat_id)
    await manager.connect(chat_id, websocket)
    try:
        while True:
            data = await websocket.receive_text()

            await manager.broadcast(user_id=user_id, chat_id=chat_id, message=data)
    except WebSocketDisconnect:
        manager.disconnect(chat_id, websocket)