import React, { useState, useEffect } from 'react';
import { useNavigate, useLocation } from 'react-router';
import { HomeAPI } from './api/index.ts';
import { MessageAPI } from './api/index.ts';
import {
  HomeIcon,
  UserIcon,
  NewspaperIcon,
  BellIcon
} from '@heroicons/react/24/outline';
import { useAuth } from './hooks.tsx';
import { formatRelativeTime } from './utils.ts';
import { KnowInfo, UserMessage, MessageType, MessageStatus } from '../share/types.ts';

// 首页组件
const HomePage: React.FC = () => {
  const { user } = useAuth();
  const navigate = useNavigate();
  const location = useLocation();
  const [loading, setLoading] = useState(true);
  const [banners, setBanners] = useState<KnowInfo[]>([]);
  const [news, setNews] = useState<KnowInfo[]>([]);
  const [notices, setNotices] = useState<UserMessage[]>([]);
  const [activeTab, setActiveTab] = useState('news');
  
  // 模拟加载数据
  useEffect(() => {
    const fetchData = async () => {
      try {
        // 获取数据
        const [bannersRes, newsRes, messagesRes] = await Promise.all([
          HomeAPI.getBanners(),
          HomeAPI.getNews(),
          MessageAPI.getMessages({ type: MessageType.ANNOUNCE })
        ]);
        
        setBanners(bannersRes.data.map((item: KnowInfo) => ({
          id: item.id,
          title: item.title,
          cover_url: item.cover_url,
          content: item.content,
          category: 'banner',
          created_at: new Date().toISOString(),
          updated_at: new Date().toISOString(),
          sort_order: item.sort_order || 0
        } as KnowInfo)));
        setNews(newsRes.data);
        setNotices(messagesRes.data);
        
        setLoading(false);
      } catch (error) {
        console.error('获取首页数据失败:', error);
        setLoading(false);
      }
    };
    
    fetchData();
  }, []);
  
  // 处理轮播图点击
  const handleBannerClick = (link: string) => {
    navigate(link);
  };
  
  // 处理新闻点击
  const handleNewsClick = (id: number) => {
    navigate(`/news/${id}`);
  };
  
  // 处理通知点击
  const handleNoticeClick = (id: number) => {
    navigate(`/notices/${id}`);
  };
  
  return (
    <div className="pb-16">
      {/* 顶部用户信息 */}
      <div className="bg-blue-600 text-white p-4">
        <div className="flex items-center justify-between">
          <div className="flex items-center space-x-3">
            <div className="w-12 h-12 rounded-full bg-white/20 flex items-center justify-center">
              {user?.avatar ? (
                <img 
                  src={user.avatar} 
                  alt={user?.nickname || user?.username || '用户'}
                  className="w-10 h-10 rounded-full object-cover"
                />
              ) : (
                <UserIcon className="w-6 h-6" />
              )}
            </div>
            <div>
              <h2 className="text-lg font-medium">
                {user ? `您好，${user.nickname || user.username}` : '您好，游客'}
              </h2>
              <p className="text-sm text-white/80">
                {user ? '欢迎回来' : '请登录体验更多功能'}
              </p>
            </div>
          </div>
          
          <div className="relative">
            <BellIcon className="w-6 h-6" />
            {notices.some(notice => notice.user_status === MessageStatus.UNREAD) && (
              <span className="absolute top-0 right-0 w-2 h-2 bg-red-500 rounded-full"></span>
            )}
          </div>
        </div>
      </div>
      
      {/* 轮播图 */}
      {!loading && banners.length > 0 && (
        <div className="relative w-full h-40 overflow-hidden mt-2">
          <div className="flex transition-transform duration-300" 
               style={{ transform: `translateX(-${0 * 100}%)` }}>
            {banners.map((banner) => (
              <div 
                key={banner.id}
                className="w-full h-40 flex-shrink-0 relative"
                onClick={() => handleBannerClick(banner.content || '')}
              >
                <img
                  src={banner.cover_url || ''}
                  alt={banner.title}
                  className="w-full h-full object-cover"
                />
                <div className="absolute bottom-0 left-0 right-0 bg-gradient-to-t from-black/70 to-transparent p-3">
                  <h3 className="text-white font-medium">{banner.title}</h3>
                </div>
              </div>
            ))}
          </div>
          
          {/* 指示器 */}
          <div className="absolute bottom-2 left-0 right-0 flex justify-center space-x-1">
            {banners.map((_, index) => (
              <span 
                key={index}
                className={`w-2 h-2 rounded-full ${index === 0 ? 'bg-white' : 'bg-white/50'}`}
              ></span>
            ))}
          </div>
        </div>
      )}
      
      {/* 快捷入口 */}
      <div className="grid grid-cols-4 gap-2 p-4 bg-white rounded-lg shadow mt-4 mx-2">
        {[
          { icon: <HomeIcon className="w-6 h-6" />, name: '首页', path: '/' },
          { icon: <NewspaperIcon className="w-6 h-6" />, name: '资讯', path: '/news' },
          { icon: <BellIcon className="w-6 h-6" />, name: '通知', path: '/notices' },
          { icon: <UserIcon className="w-6 h-6" />, name: '我的', path: '/profile' }
        ].map((item, index) => (
          <div 
            key={index}
            className="flex flex-col items-center justify-center p-2"
            onClick={() => navigate(item.path)}
          >
            <div className="w-12 h-12 rounded-full bg-blue-100 flex items-center justify-center text-blue-600 mb-1">
              {item.icon}
            </div>
            <span className="text-sm">{item.name}</span>
          </div>
        ))}
      </div>
      
      {/* 内容标签页 */}
      <div className="mt-4 mx-2">
        <div className="flex border-b border-gray-200">
          <button
            className={`flex-1 py-2 text-center ${activeTab === 'news' ? 'text-blue-600 border-b-2 border-blue-600 font-medium' : 'text-gray-500'}`}
            onClick={() => setActiveTab('news')}
          >
            最新资讯
          </button>
          <button
            className={`flex-1 py-2 text-center ${activeTab === 'notices' ? 'text-blue-600 border-b-2 border-blue-600 font-medium' : 'text-gray-500'}`}
            onClick={() => setActiveTab('notices')}
          >
            通知公告
          </button>
        </div>
        
        <div className="mt-2">
          {activeTab === 'news' ? (
            loading ? (
              <div className="flex justify-center p-4">
                <div className="w-6 h-6 border-2 border-gray-200 border-t-blue-600 rounded-full animate-spin"></div>
              </div>
            ) : (
              <div className="space-y-4">
                {news.map((item) => (
                  <div 
                    key={item.id}
                    className="bg-white p-3 rounded-lg shadow flex items-start space-x-3"
                    onClick={() => handleNewsClick(item.id)}
                  >
                    {item.cover_url && (
                      <img
                        src={item.cover_url}
                        alt={item.title}
                        className="w-20 h-20 object-cover rounded-md flex-shrink-0"
                      />
                    )}
                    <div className={item.cover_url ? '' : 'w-full'}>
                      <h3 className="font-medium text-gray-900 line-clamp-2">{item.title}</h3>
                      <p className="text-sm text-gray-500 mt-1 line-clamp-2">
                        {item.content?.substring(0, 100)}...
                      </p>
                      <div className="flex justify-between items-center mt-2">
                        <span className="text-xs text-blue-600 bg-blue-50 px-2 py-1 rounded-full">
                          {item.category}
                        </span>
                        <span className="text-xs text-gray-400">
                          {formatRelativeTime(item.created_at)}
                        </span>
                      </div>
                    </div>
                  </div>
                ))}
              </div>
            )
          ) : (
            loading ? (
              <div className="flex justify-center p-4">
                <div className="w-6 h-6 border-2 border-gray-200 border-t-blue-600 rounded-full animate-spin"></div>
              </div>
            ) : (
              <div className="space-y-3">
                {notices.map((item) => (
                  <div 
                    key={item.id}
                    className="bg-white p-3 rounded-lg shadow"
                    onClick={() => handleNoticeClick(item.id)}
                  >
                    <div className="flex justify-between items-start">
                      <h3 className={`font-medium ${item.user_status === MessageStatus.READ ? 'text-gray-700' : 'text-blue-600'}`}>
                        {item.user_status === MessageStatus.UNREAD && (
                          <span className="inline-block w-2 h-2 bg-blue-600 rounded-full mr-2"></span>
                        )}
                        {item.title}
                      </h3>
                      <span className="text-xs text-gray-400 mt-1">
                        {formatRelativeTime(item.created_at)}
                      </span>
                    </div>
                    <p className="text-sm text-gray-500 mt-2 line-clamp-2">{item.content}</p>
                  </div>
                ))}
              </div>
            )
          )}
        </div>
      </div>
      
      {/* 底部导航 */}
      <div className="fixed bottom-0 left-0 right-0 bg-white border-t border-gray-200 flex justify-around py-2">
        {[
          { icon: <HomeIcon className="w-6 h-6" />, name: '首页', path: '/' },
          { icon: <NewspaperIcon className="w-6 h-6" />, name: '资讯', path: '/news' },
          { icon: <BellIcon className="w-6 h-6" />, name: '通知', path: '/notices' },
          { icon: <UserIcon className="w-6 h-6" />, name: '我的', path: '/profile' }
        ].map((item, index) => (
          <div 
            key={index}
            className="flex flex-col items-center"
            onClick={() => navigate(item.path)}
          >
            <div className={`${location.pathname === item.path ? 'text-blue-600' : 'text-gray-500'}`}>
              {item.icon}
            </div>
            <span className={`text-xs mt-1 ${location.pathname === item.path ? 'text-blue-600' : 'text-gray-500'}`}>
              {item.name}
            </span>
          </div>
        ))}
      </div>
    </div>
  );
};

export default HomePage;