import React from 'react';
import { Routes, Route, useParams, useNavigate } from 'react-router-dom';
import { observer } from 'mobx-react-lite';
import styled from 'styled-components';
import { useAuthStore } from './stores/AuthStore';
import { useUserStore } from './stores/UserStore';
import { useRegionStore } from './stores/RegionStore';
import Layout from './components/common/Layout';
import Loading from './components/common/Loading';
import ChinaMap from './components/common/ChinaMap';
import CitiesPage from './components/region/CitiesPage';
import CityDetailPage from './components/region/CityDetailPage';
import ArticleDetailPage from './components/article/ArticleDetailPage';
import ServiceDetailPage from './components/service/ServiceDetailPage';
import LoginPage from './components/auth/LoginPage';
import RegisterPage from './components/auth/RegisterPage';

const Container = styled.div`
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
`;

const Header = styled.header`
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 2px solid #eee;
`;

const Title = styled.h1`
  margin: 0;
  font-size: 28px;
`;

function App() {
  const authStore = useAuthStore();

  // Fetch current user on app load
  React.useEffect(() => {
    if (authStore.isAuthenticated) {
      authStore.fetchCurrentUser();
    }
  }, [authStore]);

  return (
    <Layout title="城市手册" subtitle="地方志兼本地生活服务平台">
      <Routes>
        <Route path="/" element={<HomePage />} />
        <Route path="/cities" element={<CitiesPage />} />
        <Route path="/cities/:regionId" element={<CityDetailPage />} />
        <Route path="/articles/:articleId" element={<ArticleDetailPageWrapper />} />
        <Route path="/services/:serviceId" element={<ServiceDetailPageWrapper />} />
        <Route path="/login" element={<LoginPage />} />
        <Route path="/register" element={<RegisterPage />} />
        <Route path="/user/profile" element={<UserProfilePage />} />
        <Route path="*" element={<NotFoundPage />} />
      </Routes>
    </Layout>
  );
}

const ArticleDetailPageWrapper = observer(() => {
  const { articleId } = useParams();
  return <ArticleDetailPage articleId={articleId} />;
});

const ServiceDetailPageWrapper = observer(() => {
  const { serviceId } = useParams();
  return <ServiceDetailPage serviceId={serviceId} />;
});

const HomePage = observer(() => {
  const navigate = useNavigate();
  const regionStore = useRegionStore();
  const [loading, setLoading] = React.useState(false);

  const handleProvinceClick = async (geo) => {
    const provinceName = geo.properties.name;
    const provinceCode = geo.properties.code;
    
    setLoading(true);
    try {
      // 先获取所有省份列表，找到对应的 region ID
      await regionStore.fetchProvinces();
      const province = regionStore.regions.find(
        r => r.name === provinceName || r.code === provinceCode
      );
      
      if (province) {
        navigate(`/cities/${province.id}`);
      } else {
        // 如果没有找到，跳转到城市列表页并带上省份名称
        navigate(`/cities?province=${encodeURIComponent(provinceName)}`);
      }
    } catch (error) {
      console.error('Failed to navigate to province:', error);
    } finally {
      setLoading(false);
    }
  };

  return (
    <Container>
      <Header>
        <Title>欢迎来到城市手册</Title>
        <p>探索每个城市的故事与特色</p>
      </Header>
      
      {loading ? (
        <Loading message="加载中..." />
      ) : (
        <ChinaMap onProvinceClick={handleProvinceClick} />
      )}
      
      <div style={{ marginTop: '40px' }}>
        <h2>📚 最新文章</h2>
        <p>即将推出...</p>
      </div>
    </Container>
  );
});

const UserProfilePage = observer(() => {
  const authStore = useAuthStore();
  const userStore = useUserStore();

  React.useEffect(() => {
    if (authStore.isAuthenticated) {
      userStore.fetchCurrentUser();
    }
  }, [authStore, userStore]);

  if (!authStore.isAuthenticated) {
    return (
      <Container>
        <p>请先登录</p>
      </Container>
    );
  }

  if (userStore.loading) {
    return <Loading message="加载用户信息..." />;
  }

  return (
    <Container>
      <Header>
        <Title>个人中心</Title>
      </Header>
      {userStore.user && (
        <div>
          <h3>用户信息</h3>
          <p>用户名: {userStore.user.username}</p>
          <p>邮箱: {userStore.user.email}</p>
          <p>角色: {userStore.user.role_display}</p>

          <h3>统计</h3>
          <p>文章数: {userStore.user.articles_count}</p>
          <p>服务数: {userStore.user.services_count}</p>
          <p>评论数: {userStore.user.comments_count}</p>
          <p>点赞数: {userStore.user.likes_count}</p>
          <p>收藏数: {userStore.user.favorites_count}</p>
        </div>
      )}
    </Container>
  );
});

const NotFoundPage = () => (
  <Container>
    <Header>
      <Title>404</Title>
    </Header>
    <p>页面未找到</p>
  </Container>
);

export default App;