'use client';

import { useEffect, useState, useCallback, useRef } from 'react';
import { SignalRConnectionManager } from '@/lib/signalr/ConnectionManager';
import { SIGNALR_CONFIG } from '@/lib/signalr/config';
import { useAuthStore } from '@/stores/authStore';
import type { ProjectHubEventCallbacks } from '@/lib/signalr/types';

// Re-export for backward compatibility
interface UseProjectHubOptions extends ProjectHubEventCallbacks {}

export function useProjectHub(projectId?: string, options?: UseProjectHubOptions) {
  const isAuthenticated = useAuthStore((state) => state.isAuthenticated);
  const [connectionState, setConnectionState] = useState<
    'disconnected' | 'connecting' | 'connected' | 'reconnecting'
  >('disconnected');
  const managerRef = useRef<SignalRConnectionManager | null>(null);

  useEffect(() => {
    if (!isAuthenticated) return;

    const manager = new SignalRConnectionManager(
      SIGNALR_CONFIG.HUB_URLS.PROJECT
    );
    managerRef.current = manager;

    const unsubscribe = manager.onStateChange(setConnectionState);

    // ============================================
    // PROJECT EVENTS (3)
    // ============================================
    manager.on('ProjectCreated', (data: any) => {
      console.log('[ProjectHub] Project created:', data);
      options?.onProjectCreated?.(data);
    });

    manager.on('ProjectUpdated', (data: any) => {
      console.log('[ProjectHub] Project updated:', data);
      options?.onProjectUpdated?.(data);
    });

    manager.on('ProjectArchived', (data: any) => {
      console.log('[ProjectHub] Project archived:', data);
      options?.onProjectArchived?.(data);
    });

    // ============================================
    // EPIC EVENTS (3)
    // ============================================
    manager.on('EpicCreated', (data: any) => {
      console.log('[ProjectHub] Epic created:', data);
      options?.onEpicCreated?.(data);
    });

    manager.on('EpicUpdated', (data: any) => {
      console.log('[ProjectHub] Epic updated:', data);
      options?.onEpicUpdated?.(data);
    });

    manager.on('EpicDeleted', (data: any) => {
      console.log('[ProjectHub] Epic deleted:', data);
      options?.onEpicDeleted?.(data);
    });

    // ============================================
    // STORY EVENTS (3)
    // ============================================
    manager.on('StoryCreated', (data: any) => {
      console.log('[ProjectHub] Story created:', data);
      options?.onStoryCreated?.(data);
    });

    manager.on('StoryUpdated', (data: any) => {
      console.log('[ProjectHub] Story updated:', data);
      options?.onStoryUpdated?.(data);
    });

    manager.on('StoryDeleted', (data: any) => {
      console.log('[ProjectHub] Story deleted:', data);
      options?.onStoryDeleted?.(data);
    });

    // ============================================
    // TASK EVENTS (4)
    // ============================================
    manager.on('TaskCreated', (data: any) => {
      console.log('[ProjectHub] Task created:', data);
      options?.onTaskCreated?.(data);
    });

    manager.on('TaskUpdated', (data: any) => {
      console.log('[ProjectHub] Task updated:', data);
      options?.onTaskUpdated?.(data);
    });

    manager.on('TaskDeleted', (data: any) => {
      console.log('[ProjectHub] Task deleted:', data);
      options?.onTaskDeleted?.(data);
    });

    manager.on('TaskAssigned', (data: any) => {
      console.log('[ProjectHub] Task assigned:', data);
      options?.onTaskAssigned?.(data);
    });

    // ============================================
    // LEGACY ISSUE EVENTS (Backward Compatibility)
    // ============================================
    manager.on('IssueCreated', (data: any) => {
      console.log('[ProjectHub] Issue created:', data);
      options?.onIssueCreated?.(data);
    });

    manager.on('IssueUpdated', (data: any) => {
      console.log('[ProjectHub] Issue updated:', data);
      options?.onIssueUpdated?.(data);
    });

    manager.on('IssueDeleted', (data: any) => {
      console.log('[ProjectHub] Issue deleted:', data);
      options?.onIssueDeleted?.(data);
    });

    manager.on('IssueStatusChanged', (data: any) => {
      console.log('[ProjectHub] Issue status changed:', data);
      options?.onIssueStatusChanged?.(data);
    });

    // ============================================
    // USER COLLABORATION EVENTS
    // ============================================
    manager.on('UserJoinedProject', (data: any) => {
      console.log('[ProjectHub] User joined:', data);
      options?.onUserJoinedProject?.(data);
    });

    manager.on('UserLeftProject', (data: any) => {
      console.log('[ProjectHub] User left:', data);
      options?.onUserLeftProject?.(data);
    });

    manager.on('TypingIndicator', (data: any) => {
      console.log('[ProjectHub] Typing indicator:', data);
      options?.onTypingIndicator?.(data);
    });

    manager.start();

    return () => {
      unsubscribe();
      manager.stop();
    };
  }, [isAuthenticated, options]);

  // 加入项目房间
  const joinProject = useCallback(async (projectId: string) => {
    if (!managerRef.current) return;

    try {
      await managerRef.current.invoke('JoinProject', projectId);
      console.log(`[ProjectHub] Joined project ${projectId}`);
    } catch (error) {
      console.error('[ProjectHub] Error joining project:', error);
    }
  }, []);

  // 离开项目房间
  const leaveProject = useCallback(async (projectId: string) => {
    if (!managerRef.current) return;

    try {
      await managerRef.current.invoke('LeaveProject', projectId);
      console.log(`[ProjectHub] Left project ${projectId}`);
    } catch (error) {
      console.error('[ProjectHub] Error leaving project:', error);
    }
  }, []);

  // 发送正在输入指示器
  const sendTypingIndicator = useCallback(
    async (projectId: string, issueId: string, isTyping: boolean) => {
      if (!managerRef.current) return;

      try {
        await managerRef.current.invoke(
          'SendTypingIndicator',
          projectId,
          issueId,
          isTyping
        );
      } catch (error) {
        console.error('[ProjectHub] Error sending typing indicator:', error);
      }
    },
    []
  );

  // 当 projectId 变化时自动加入/离开
  useEffect(() => {
    if (connectionState === 'connected' && projectId) {
      joinProject(projectId);

      return () => {
        leaveProject(projectId);
      };
    }
  }, [connectionState, projectId, joinProject, leaveProject]);

  return {
    connectionState,
    joinProject,
    leaveProject,
    sendTypingIndicator,
    isConnected: connectionState === 'connected',
  };
}