import json
import logging
from typing import List

from fastapi import WebSocket

logger = logging.getLogger(__name__)


class ConnectionManager:
    def __init__(self):
        self.active_connections: List[WebSocket] = []

    async def connect(self, ws: WebSocket):
        await ws.accept()
        self.active_connections.append(ws)
        logger.info("WebSocket connected. Total connections: %d", len(self.active_connections))

    async def disconnect(self, ws: WebSocket):
        if ws in self.active_connections:
            self.active_connections.remove(ws)
        logger.info("WebSocket disconnected. Total connections: %d", len(self.active_connections))

    async def broadcast(self, message: dict):
        if not self.active_connections:
            return
        payload = json.dumps(message)
        dead: List[WebSocket] = []
        for connection in self.active_connections:
            try:
                await connection.send_text(payload)
            except Exception as exc:
                logger.warning("Failed to send to WebSocket: %s", exc)
                dead.append(connection)
        for ws in dead:
            await self.disconnect(ws)


manager = ConnectionManager()