// 主入口：串联 UI、认证、地图与 AI
(function () {
  const $ = sel => document.querySelector(sel);

  // ================== 用户界面 ==================
  function renderUserArea() {
    const user = window.Auth.currentUser();
    const area = $('#userArea');
    if (user) {
      area.innerHTML = `<span style="margin-right:10px;font-size:13px">👤 ${user}</span>` +
        `<button id="logoutBtn" class="btn">退出</button>`;
      $('#logoutBtn').addEventListener('click', () => {
        window.Auth.logout();
        renderUserArea();
        loadSpots();
      });
    } else {
      area.innerHTML = `<button id="loginBtn" class="btn">登录 / 注册</button>`;
      $('#loginBtn').addEventListener('click', openModal);
    }
  }

  // ================== 弹窗 ==================
  function openModal() {
    $('#loginModal').classList.remove('hidden');
  }
  function closeModal() {
    $('#loginModal').classList.add('hidden');
    $('#usernameInput').value = '';
    $('#passwordInput').value = '';
  }

  function bindModal() {
    $('#closeModal').addEventListener('click', closeModal);
    $('#doLogin').addEventListener('click', () => {
      const u = $('#usernameInput').value.trim();
      const p = $('#passwordInput').value;
      const res = window.Auth.login(u, p);
      if (!res.ok) return alert(res.msg);
      closeModal();
      renderUserArea();
      loadSpots();
    });
    $('#doRegister').addEventListener('click', () => {
      const u = $('#usernameInput').value.trim();
      const p = $('#passwordInput').value;
      const res = window.Auth.register(u, p);
      if (!res.ok) return alert(res.msg);
      closeModal();
      renderUserArea();
      loadSpots();
    });
  }

  // ================== 景点数据存储 ==================
  function loadSpots() {
    const key = window.Auth.dataKey('spots');
    if (!key) {
      // 未登录：清空地图
      window.MapAPI.setSpots([]);
      renderSpotList([]);
      return;
    }
    let spots = [];
    try { spots = JSON.parse(localStorage.getItem(key)) || []; }
    catch (e) { spots = []; }
    window.MapAPI.setSpots(spots);
    renderSpotList(spots);
  }

  function saveSpots(spots) {
    const key = window.Auth.dataKey('spots');
    if (!key) return;
    localStorage.setItem(key, JSON.stringify(spots));
  }

  // 当 MapAPI 内部数据变化时回调
  window.MapAPI.onSpotsChange = function (spots) {
    saveSpots(spots);
    renderSpotList(spots);
  };

  // ================== 景点列表渲染 ==================
  let currentFilter = 'all';

  function renderSpotList(spots) {
    const list = $('#spotList');
    list.innerHTML = '';
    const filtered = spots.filter(s => {
      if (currentFilter === 'all') return true;
      return s.status === currentFilter;
    });
    if (filtered.length === 0) {
      list.innerHTML = '<li style="color:#94a3b8">暂无景点</li>';
      return;
    }
    filtered.forEach(s => {
      const li = document.createElement('li');
      li.innerHTML = `<span>${s.name}</span>` +
        `<span class="status ${s.status}">${s.status === 'visited' ? '去过' : '想去'}</span>`;
      li.style.cursor = 'pointer';
      li.addEventListener('click', () => {
        window.MapAPI.flyTo(s.lat, s.lng, 14);
      });
      list.appendChild(li);
    });
  }

  // ================== 过滤器 ==================
  function bindFilter() {
    document.querySelectorAll('input[name="filter"]').forEach(el => {
      el.addEventListener('change', e => {
        currentFilter = e.target.value;
        renderSpotList(window.MapAPI.getSpots());
      });
    });
  }

  // ================== AI 生成 ==================
  function bindAI() {
    $('#genBtn').addEventListener('click', async () => {
      const dest = $('#destInput').value.trim();
      const days = parseInt($('#daysInput').value, 10) || 1;
      const pref = $('#prefInput').value;
      const result = $('#planResult');
      result.textContent = '⏳ 正在生成行程...';
      try {
        const text = await window.AI.generatePlanAsync(dest, days, pref);
        result.textContent = text;
        // 顺便把目的地飞到地图中心
        const cityCoords = {
          '杭州': [30.2741, 120.1551],
          '北京': [39.9042, 116.4074],
          '成都': [30.5728, 104.0668],
          '上海': [31.2304, 121.4737]
        };
        if (cityCoords[dest]) {
          window.MapAPI.flyTo(cityCoords[dest][0], cityCoords[dest][1], 11);
        }
      } catch (err) {
        result.textContent = '生成失败：' + err.message;
      }
    });
  }

  // ================== 启动 ==================
  function init() {
    renderUserArea();
    bindModal();
    bindFilter();
    bindAI();
    loadSpots();
  }

  document.addEventListener('DOMContentLoaded', init);
})();