<template>
  <div class="main-layout">
    <!-- 左侧菜单栏 -->
    <aside class="sidebar" :class="{ collapsed: sidebarCollapsed }">
      <div class="sidebar-header">
        <h2 class="logo">Apple ERP</h2>
        <button 
          class="collapse-btn" 
          @click="toggleSidebar"
          :title="sidebarCollapsed ? '展开菜单' : '收起菜单'"
        >
          {{ sidebarCollapsed ? '→' : '←' }}
        </button>
      </div>
      
      <nav class="sidebar-nav">
        <ul class="nav-list">
          <li v-for="item in menuItems" :key="item.path || item.name" class="nav-item">
            <!-- 一级菜单 -->
            <div v-if="!item.children" class="nav-item-single">
              <a 
                @click="handleMenuClick(item.path)"
                class="nav-link"
                :class="{ active: $route.path === item.path }"
              >
                <span class="nav-icon">{{ item.icon }}</span>
                <span class="nav-text" v-show="!sidebarCollapsed">{{ item.name }}</span>
              </a>
            </div>
            
            <!-- 有子菜单的一级菜单 -->
            <div v-else class="nav-item-group">
              <div 
                class="nav-link nav-link-parent"
                :class="{ active: isParentActive(item) }"
                @click="toggleSubmenu(item)"
              >
                <span class="nav-icon">{{ item.icon }}</span>
                <span class="nav-text" v-show="!sidebarCollapsed">{{ item.name }}</span>
                <span class="nav-arrow" v-show="!sidebarCollapsed">{{ item.expanded ? '▼' : '▶' }}</span>
              </div>
              
              <!-- 二级菜单 -->
              <ul v-if="item.expanded && !sidebarCollapsed" class="submenu">
                <li v-for="child in item.children" :key="child.path" class="submenu-item">
                  <a 
                    @click="child.path ? handleMenuClick(child.path) : null"
                    class="nav-link nav-link-child"
                    :class="{ active: $route.path === child.path }"
                  >
                    <span class="nav-icon">{{ child.icon }}</span>
                    <span class="nav-text">{{ child.name }}</span>
                  </a>
                </li>
              </ul>
            </div>
          </li>
        </ul>
      </nav>
    </aside>

    <!-- 主内容区域 -->
    <div class="main-content">
      <!-- 顶部导航栏 -->
      <header class="top-header">
        <div class="header-left">
          <button class="menu-toggle" @click="toggleSidebar">
            ☰
          </button>
          <h1 class="page-title">{{ currentPageTitle }}</h1>
        </div>
        
        <div class="header-right">
          <div class="user-info">
            <span class="welcome-text">欢迎，{{ userInfo?.username || '用户' }}</span>
            <div class="user-actions">
              <button class="logout-btn" @click="handleLogout">退出登录</button>
            </div>
          </div>
        </div>
      </header>

      <!-- 标签页导航栏 -->
      <div class="tab-navigation">
        <div class="tab-scroll-left" @click="scrollTabsLeft">
          <span class="scroll-arrow">‹‹</span>
        </div>
        <div class="tab-container" ref="tabContainer">
          <div 
            v-for="tab in openTabs" 
            :key="tab.id"
            class="tab-item"
            :class="{ active: tab.active }"
            @click="switchToTab(tab)"
          >
            <span class="tab-name">{{ tab.name }}</span>
            <span 
              v-if="tab.closable" 
              @click.stop="closeTab(tab)" 
              class="tab-close"
            >×</span>
          </div>
        </div>
        <div class="tab-scroll-right" @click="scrollTabsRight">
          <span class="scroll-arrow">››</span>
        </div>
      </div>

      <!-- 页面内容 -->
      <main class="page-content">
        <router-view />
      </main>
      
      <!-- 底部栏 -->
      <footer class="main-footer">
        <div class="footer-content">
          <p class="copyright">© 2025 Erry Copyright</p>
        </div>
      </footer>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, computed, onMounted, watch, nextTick } from 'vue'
import { useRouter, useRoute } from 'vue-router'
import { logoutApi } from '../api/auth'

const router = useRouter()
const route = useRoute()

// 侧边栏状态
const sidebarCollapsed = ref(false)

// 用户信息
const userInfo = ref<any>(null)

// 标签页容器引用
const tabContainer = ref<HTMLElement>()

// 菜单项配置
const menuItems = ref([
  { name: '首页', path: '/main/dashboard', icon: '🏠' },
  { name: '订单管理', path: '/main/order', icon: '📋' },
  { name: '出库查询', path: '/main/delivery', icon: '📦' },
  { name: '发票管理', path: '/main/invoice', icon: '🧾' },
  { name: '产品管理', path: '/main/product', icon: '📦' },
  { name: '经销商管理', path: '/main/dealer', icon: '🏢' },
  { name: '返利管理', path: '/main/rebate', icon: '💰' },
  { name: '异常工单', path: '/main/exception-workorder', icon: '⚠️' },
  { 
    name: '系统设置', 
    icon: '⚙️',
    expanded: false,
    children: [
      { name: '用户管理', path: '/main/users', icon: '👤' },
      { name: '角色管理', path: '/main/sys/role', icon: '🛡️' },
      { name: '菜单管理', path: '/main/sys/menu', icon: '📝' },
      { 
        name: '字典管理', 
        path: '/main/sys/dict',
        icon: '📖',
        expanded: false,
        children: [
          { name: '字典类型', path: '/main/sys/dict', icon: '📋' },
          { name: '字典项', path: '/main/sys/dict-item', icon: '📝' }
        ]
      },
      { name: '日志管理', path: '/main/sys/log', icon: '📊' }
    ]
  }
])

// 打开的标签页
const openTabs = ref([
  { id: 1, name: '首页', path: '/main/dashboard', active: true, closable: false }
])

// 当前页面标题
const currentPageTitle = computed(() => {
  const activeTab = openTabs.value.find(tab => tab.active)
  return activeTab ? activeTab.name : 'Apple经销商ERP系统'
})

// 处理菜单点击
const handleMenuClick = (path: string) => {
  if (path && path !== route.path) {
    console.log('菜单导航:', path)
    
    // 检查是否已经存在该标签页
    const existingTab = openTabs.value.find(tab => tab.path === path)
    if (existingTab) {
      // 切换到已存在的标签页
      switchToTab(existingTab)
    } else {
      // 创建新标签页
      const menuItem = findMenuItemByPath(path)
      if (menuItem) {
        addNewTab(menuItem.name, path)
      }
    }
    
    router.push(path).catch(err => {
      console.error('路由跳转失败:', err)
    })
  }
}

// 根据路径查找菜单项
const findMenuItemByPath = (path: string) => {
  for (const item of menuItems.value) {
    if (item.path === path) {
      return item
    }
    if (item.children && Array.isArray(item.children)) {
      const child = item.children.find((child: any) => child.path === path)
      if (child) return child
    }
  }
  return null
}

// 添加新标签页
const addNewTab = (name: string, path: string) => {
  // 先取消所有标签页的激活状态
  openTabs.value.forEach(tab => tab.active = false)
  
  // 添加新标签页
  const newTab = {
    id: Date.now(),
    name: name,
    path: path,
    active: true,
    closable: true
  }
  
  openTabs.value.push(newTab)
}

// 切换到指定标签页
const switchToTab = (tab: any) => {
  // 取消所有标签页的激活状态
  openTabs.value.forEach(t => t.active = false)
  
  // 激活当前标签页
  tab.active = true
  
  // 跳转到对应路由
  if (tab.path !== route.path) {
    router.push(tab.path)
  }
}

// 关闭标签页
const closeTab = (tab: any) => {
  if (!tab.closable) return
  
  const tabIndex = openTabs.value.findIndex(t => t.id === tab.id)
  if (tabIndex === -1) return
  
  // 如果关闭的是当前激活的标签页
  if (tab.active) {
    // 找到下一个要激活的标签页
    let nextActiveTab = null
    
    // 优先选择右侧的标签页
    if (tabIndex < openTabs.value.length - 1) {
      nextActiveTab = openTabs.value[tabIndex + 1]
    } else if (tabIndex > 0) {
      nextActiveTab = openTabs.value[tabIndex - 1]
    }
    
    // 移除当前标签页
    openTabs.value.splice(tabIndex, 1)
    
    // 激活下一个标签页
    if (nextActiveTab) {
      nextActiveTab.active = true
      router.push(nextActiveTab.path)
    } else {
      // 如果没有其他标签页，跳转到首页
      router.push('/main/dashboard')
    }
  } else {
    // 如果关闭的不是当前激活的标签页，直接移除
    openTabs.value.splice(tabIndex, 1)
  }
}

// 标签页滚动功能
const scrollTabsLeft = () => {
  if (tabContainer.value) {
    tabContainer.value.scrollBy({ left: -200, behavior: 'smooth' })
  }
}

const scrollTabsRight = () => {
  if (tabContainer.value) {
    tabContainer.value.scrollBy({ left: 200, behavior: 'smooth' })
  }
}

// 切换子菜单展开/收起
const toggleSubmenu = (item: any) => {
  item.expanded = !item.expanded
  
  // 如果父级菜单有路径，则同时导航到该路径
  if (item.path && item.path !== route.path) {
    handleMenuClick(item.path)
  }
}

// 检查父菜单是否激活
const isParentActive = (item: any) => {
  if (!item.children) return false
  return item.children.some((child: any) => child.path === route.path)
}

// 切换侧边栏
const toggleSidebar = () => {
  sidebarCollapsed.value = !sidebarCollapsed.value
}

// 退出登录
const handleLogout = async () => {
  if (confirm('确定要退出登录吗？')) {
    try {
      // 调用后端退出登录接口
      await logoutApi()
    } catch (error) {
      console.error('退出登录接口调用失败:', error)
    } finally {
      // 无论接口调用成功与否，都清除本地存储
      localStorage.removeItem('token')
      localStorage.removeItem('userInfo')
      
      // 跳转到登录页
      router.push('/')
    }
  }
}

// 监听路由变化，自动管理标签页
watch(() => route.path, (newPath) => {
  // 检查是否已经存在该路径的标签页
  const existingTab = openTabs.value.find(tab => tab.path === newPath)
  
  if (existingTab) {
    // 如果存在，激活该标签页
    openTabs.value.forEach(tab => tab.active = false)
    existingTab.active = true
  } else {
    // 如果不存在，创建新标签页
    const menuItem = findMenuItemByPath(newPath)
    if (menuItem) {
      addNewTab(menuItem.name, newPath)
    }
  }
  
  // 自动展开对应的父菜单
  for (const item of menuItems.value) {
    if (item.children && Array.isArray(item.children)) {
      const hasActiveChild = item.children.some((child: any) => child.path === newPath)
      if (hasActiveChild) {
        item.expanded = true
        break
      }
    }
  }
}, { immediate: true })

// 组件挂载时获取用户信息
onMounted(() => {
  const storedUserInfo = localStorage.getItem('userInfo')
  if (storedUserInfo) {
    userInfo.value = JSON.parse(storedUserInfo)
  }
})
</script>

<style scoped>
.main-layout {
  display: flex;
  height: 100vh;
  background-color: #f5f5f5;
}

/* 左侧菜单栏 */
.sidebar {
  width: 200px;
  background: linear-gradient(180deg, #2c3e50 0%, #34495e 100%);
  color: white;
  transition: width 0.3s ease;
  overflow: hidden;
  box-shadow: 2px 0 5px rgba(0,0,0,0.1);
  z-index: 1000;
}

.sidebar.collapsed {
  width: 50px;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo {
  margin: 0;
  font-size: 16px;
  font-weight: bold;
  color: #ecf0f1;
}

.collapse-btn {
  background: none;
  border: none;
  color: white;
  font-size: 14px;
  cursor: pointer;
  padding: 4px;
  border-radius: 3px;
  transition: background-color 0.3s;
}

.collapse-btn:hover {
  background-color: rgba(255,255,255,0.1);
}

/* 导航菜单 */
.sidebar-nav {
  padding: 16px 0;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  margin-bottom: 5px;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  color: #bdc3c7;
  text-decoration: none;
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
  cursor: pointer;
}

.nav-link:hover {
  background-color: rgba(255,255,255,0.1);
  color: white;
}

.nav-link.active {
  background-color: rgba(52, 152, 219, 0.2);
  color: #3498db;
  border-left-color: #3498db;
}

.nav-icon {
  font-size: 16px;
  margin-right: 10px;
  min-width: 18px;
}

.nav-text {
  font-size: 13px;
  white-space: nowrap;
}

.nav-arrow {
  font-size: 10px;
  margin-left: auto;
  transition: transform 0.3s ease;
}

/* 二级菜单样式 */
.nav-item-group {
  margin-bottom: 5px;
}

.nav-link-parent {
  cursor: pointer;
  user-select: none;
}

.nav-link-parent:hover {
  background-color: rgba(255,255,255,0.1);
  color: white;
}

.submenu {
  list-style: none;
  margin: 0;
  padding: 0;
  background: rgba(0,0,0,0.1);
  border-left: 2px solid #3498db;
}

.submenu-item {
  margin: 0;
}

.nav-link-child {
  padding: 6px 12px 6px 32px;
  font-size: 12px;
  color: #bdc3c7;
}

.nav-link-child:hover {
  background-color: rgba(255,255,255,0.05);
  color: white;
}

.nav-link-child.active {
  background-color: rgba(52, 152, 219, 0.2);
  color: #3498db;
}

/* 主内容区域 */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
}

/* 顶部导航栏 */
.top-header {
  background: white;
  padding: 0 16px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  border-bottom: 1px solid #e0e0e0;
  position: relative;
  z-index: 100;
  width: 100%;
  min-height: 50px;
}

.header-left {
  display: flex;
  align-items: center;
}

.menu-toggle {
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  padding: 6px;
  margin-right: 12px;
  border-radius: 4px;
  transition: background-color 0.3s;
}

.menu-toggle:hover {
  background-color: #f0f0f0;
}

.page-title {
  margin: 0;
  font-size: 18px;
  color: #333;
  font-weight: 500;
}

.header-right {
  display: flex;
  align-items: center;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 15px;
}

.welcome-text {
  color: #666;
  font-size: 13px;
}

.logout-btn {
  background: #e74c3c;
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  transition: background-color 0.3s;
}

.logout-btn:hover {
  background: #c0392b;
}

/* 标签页导航栏 */
.tab-navigation {
  background: white;
  border-bottom: 1px solid #e0e0e0;
  display: flex;
  align-items: center;
  height: 32px;
  padding: 0 6px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.tab-scroll-left,
.tab-scroll-right {
  background: #f5f5f5;
  border: 1px solid #d9d9d9;
  padding: 2px 6px;
  cursor: pointer;
  border-radius: 2px;
  margin: 0 1px;
  transition: all 0.2s;
}

.tab-scroll-left:hover,
.tab-scroll-right:hover {
  background: #e6f7ff;
  border-color: #91d5ff;
}

.scroll-arrow {
  font-size: 10px;
  color: #666;
  font-weight: bold;
}

.tab-container {
  flex: 1;
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.tab-container::-webkit-scrollbar {
  display: none;
}

.tab-item {
  display: flex;
  align-items: center;
  padding: 4px 8px;
  margin: 0 1px;
  background: white;
  border: 1px solid #d9d9d9;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  min-width: 60px;
  position: relative;
}

.tab-item:hover {
  background: #f0f8ff;
  border-color: #91d5ff;
}

.tab-item.active {
  background: #1890ff;
  border-color: #1890ff;
  color: white;
}

.tab-name {
  font-size: 11px;
  margin-right: 4px;
}

.tab-close {
  font-size: 12px;
  cursor: pointer;
  padding: 1px;
  border-radius: 2px;
  transition: all 0.2s;
}

.tab-item:not(.active) .tab-close {
  color: #999;
}

.tab-item:not(.active) .tab-close:hover {
  background: #f5f5f5;
  color: #666;
}

.tab-item.active .tab-close {
  color: white;
}

.tab-item.active .tab-close:hover {
  background: rgba(255,255,255,0.2);
}

/* 页面内容 */
.page-content {
  flex: 1;
  padding: 0;
  overflow-y: auto;
  background-color: #f8f9fa;
  position: relative;
}

/* 底部栏 */
.main-footer {
  background: white;
  color: #333;
  padding: 8px 20px;
  border-top: 1px solid #e0e0e0;
  box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
}

.footer-content {
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.copyright {
  margin: 0;
  font-size: 12px;
  color: #666;
  text-align: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -200px;
    z-index: 1000;
    height: 100vh;
  }
  
  .sidebar:not(.collapsed) {
    left: 0;
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .tab-navigation {
    height: 28px;
  }
  
  .tab-item {
    min-width: 50px;
    padding: 3px 6px;
  }
  
  .tab-name {
    font-size: 10px;
  }
}
</style>