'use client';
import { useState, useEffect, useRef, useCallback } from 'react';
import { createClient } from '@/utils/supabase';
import type { RealtimeChannel } from '@supabase/supabase-js';

export type ConnectionStatus =
  | 'connecting'
  | 'connected'
  | 'disconnected'
  | 'updating';

type UseStatusSubscriptionOptions = {
  enabled?: boolean;
  onStatusUpdate?: () => void;
  maxReconnectAttempts?: number;
  reconnectDelay?: number;
}

export const useStatusSubscription = ({
  enabled = true,
  onStatusUpdate,
  maxReconnectAttempts = 5,
  reconnectDelay = 2000,
}: UseStatusSubscriptionOptions = {}) => {
  const [connectionStatus, setConnectionStatus] =
    useState<ConnectionStatus>('disconnected');
  const channelRef = useRef<RealtimeChannel | null>(null);
  const supabaseRef = useRef(createClient());
  const reconnectAttemptsRef = useRef(0);
  const reconnectTimeoutRef = useRef<NodeJS.Timeout | undefined>(undefined);
  const isComponentMountedRef = useRef(true);
  const visibilityTimeoutRef = useRef<NodeJS.Timeout | undefined>(undefined);

  const cleanup = useCallback(() => {
    if (reconnectTimeoutRef.current) {
      clearTimeout(reconnectTimeoutRef.current);
      reconnectTimeoutRef.current = undefined;
    }
    if (visibilityTimeoutRef.current) {
      clearTimeout(visibilityTimeoutRef.current);
      visibilityTimeoutRef.current = undefined;
    }
    if (channelRef.current) {
      supabaseRef.current.removeChannel(channelRef.current).catch((error) => {
        console.error('❌ cleanup: Error removing channel:', error);
      });
      channelRef.current = null;
    }
  }, []);

  const connect = useCallback(() => {
    if (!enabled || !isComponentMountedRef.current) return;

    cleanup();
    setConnectionStatus('connecting');

    const channel = supabaseRef.current
      .channel('status_updates', {
        config: { broadcast: {self: true }}
      });
    channel
      .on('broadcast', { event: 'status_updated' }, (payload) => {
        onStatusUpdate?.();
      })
      .subscribe((status) => {
        if (!isComponentMountedRef.current) return;

        // eslint-disable-next-line @typescript-eslint/no-unsafe-enum-comparison
        if (status === 'SUBSCRIBED') {
          setConnectionStatus('connected');
          reconnectAttemptsRef.current = 0;
        // eslint-disable-next-line @typescript-eslint/no-unsafe-enum-comparison
        } else if (status === 'CHANNEL_ERROR' || status === 'CLOSED') {
          setConnectionStatus('disconnected');
          if (reconnectAttemptsRef.current < maxReconnectAttempts) {
            reconnectAttemptsRef.current++;
            const delay = reconnectDelay * reconnectAttemptsRef.current;

            reconnectTimeoutRef.current = setTimeout(() => {
              if (isComponentMountedRef.current) connect();
            }, delay);
          } else {
            console.warn('⚠️ connect: Max reconnection attempts reached');
            setConnectionStatus('disconnected');
          }
        }
      });

    channelRef.current = channel;
  }, [enabled, onStatusUpdate, maxReconnectAttempts, reconnectDelay, cleanup]);

  const disconnect = useCallback(() => {
    cleanup();
    setConnectionStatus('disconnected');
  }, [cleanup]);

  const reconnect = useCallback(() => {
    reconnectAttemptsRef.current = 0;
    connect();
  }, [connect]);

  // Handle visibility change for better reconnection
  useEffect(() => {
    const handleVisibilityChange = () => {
      if (!enabled) return;
      if (document.visibilityState === 'visible') {
        visibilityTimeoutRef.current = setTimeout(() => {
          if (connectionStatus === 'disconnected' && isComponentMountedRef.current) {
            reconnect();
          }
        }, 1000);
      }
    };
    document.addEventListener('visibilitychange', handleVisibilityChange);
    return () => {
      document.removeEventListener('visibilitychange', handleVisibilityChange);
    };
  }, [enabled, connectionStatus, reconnect]);

  // Initial connection - SIMPLIFIED to avoid dependency issues
  useEffect(() => {
    if (!enabled) {
      disconnect();
      return;
    }
    const initialTimeout = setTimeout(() => {
      if (isComponentMountedRef.current) connect();
    }, 1000);

    return () => {
      clearTimeout(initialTimeout);
    };
  }, [enabled]);

  // Cleanup on unmount
  useEffect(() => {
    return () => {
      cleanup();
    };
  }, [cleanup]);

  return {
    connectionStatus,
    connect: reconnect,
    disconnect,
  };
};