<template>
  <div class="admin-dashboard">
    <!-- 顶部图片 -->
     <div class="top-image-container">
        <img src="/images/teacher/顶部.png" alt="顶部图片" class="top-image">

     </div>

    <div class="main-content">
      <!-- 侧边栏 -->
      <div class="sidebar-container">
          <!-- 头像 -->
           <div class="avatar-container">
              <img src="https://picsum.photos/200/200" alt="头像" class="avatar">
              <div class="avatar-text">
                  用户昵称~
              </div>
           </div>

           <!-- 导航栏 -->
            <div class="nav-container">
              <router-link to="/teacher/course-management" class="nav-item" :class="{ active: activeNavItem === 0 }" @click="setActiveNavItem(0)">
                  <img :src="activeNavItem === 0 ? '/images/teacher/课程管理(选中).png' : '/images/teacher/课程管理.png'" alt="">
                  <span>课程管理</span>
              </router-link>
              <router-link to="/teacher/student-management" class="nav-item" :class="{ active: activeNavItem === 1 }" @click="setActiveNavItem(1)">

                  <img :src="activeNavItem === 1 ? '/images/teacher/学院管理(选中).png' : '/images/teacher/学员管理.png'" alt="">
                  <span>学员管理</span>
              </router-link>
              <router-link to="/teacher/my-resources" class="nav-item" :class="{ active: activeNavItem === 2 }" @click="setActiveNavItem(2)">
                  <img :src="activeNavItem === 2 ? '/images/teacher/我的资源(选中).png' : '/images/teacher/我的资源.png'" alt="">
                  <span>我的资源</span>
              </router-link>
              <router-link to="/teacher/personal-center" class="nav-item" :class="{ active: activeNavItem === 3 }" @click="setActiveNavItem(3)">

                  <img :src="activeNavItem === 3 ? '/images/teacher/个人中心(选中).png' : '/images/teacher/个人中心.png'" alt="">
                  <span>个人中心</span>
              </router-link>
            </div>
      </div>

      <!-- 右侧路由视图 -->
      <div class="router-view-container">
        <!-- 面包屑 -->
        <div class="breadcrumb">
            <span class="breadcrumb-separator">|</span>
            <n-breadcrumb>
                <n-breadcrumb-item v-for="(item, index) in breadcrumbItems" :key="index" :to="item.path">
                    {{ item.title }}
                </n-breadcrumb-item>
            </n-breadcrumb>
        </div>
        <router-view></router-view>
      </div>
    </div>

  </div>
</template>

<script setup lang="ts">
import { ref, onMounted, computed, watch } from 'vue'
import { useRoute } from 'vue-router'

const width = window.innerWidth;
const height = window.innerHeight;
console.log(`当前屏幕宽度: ${width}px, 高度: ${height}px`);

// 添加导航项激活状态管理
const activeNavItem = ref(0);
const route = useRoute();

const setActiveNavItem = (index: number) => {
  activeNavItem.value = index;
}

// 动态生成面包屑
const breadcrumbItems = computed(() => {
  // 获取当前路由的matched数组
  const matchedRoutes = route.matched;
  
  // 处理matchedRoutes，过滤掉'管理后台'并生成面包屑项
  return matchedRoutes
    .filter(item => item.meta.title !== '管理后台')
    .map(item => ({
      title: item.meta.title || '未知页面',
      path: item.path
    }));
});

// 监听路由变化，更新激活的导航项
onMounted(() => {
  // 初始设置
  updateActiveNavItem();
});

// 使用watch监听路由变化
watch(route, () => {
  updateActiveNavItem();
});

// 更新激活的导航项
const updateActiveNavItem = () => {
  const path = route.path;
  if (path.includes('course-management')) {
    activeNavItem.value = 0;
  } else if (path.includes('student-management')) {
    activeNavItem.value = 1;
  } else if (path.includes('my-resources')) {
    activeNavItem.value = 2;
  } else if (path.includes('personal-center')) {
    activeNavItem.value = 3;
  }
}

</script>

<style scoped>
.top-image-container {
  position: relative;
  width: 100%;
  height: 130px;
  overflow: hidden;
}

.top-image {
  width: 1920px;
  height: 130px;
  position: absolute;
  left: 0px;
  /* top: 20px; */
  opacity: 100%;
  object-fit: cover;
}

.main-content {
  display: flex;
}

.sidebar-container{
    width: 294px;
    height: calc(100vh - 130px);
    background: #FFFFFF;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}
.avatar-container{
    height: 230px;
    position: relative;
    /* 移除原来的边框 */
}

/* 添加带间距的横线 */
.avatar-container::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20px;
    right: 20px;
    height: 1px;
    background-color: #E6E6E6;
}
.avatar-container img{
    width: 95px;
    height: 95px;
    /* 圆角 */
    border-radius: 50%;
    margin-top: 55px;
    margin-left: 100px;
    margin-right: 99;
}
.avatar-text{
    margin-left: 98px;
    height: 31px;
    font-family: AppleSystemUIFont;
    font-size: 22px;
    color: #000000;
    line-height: 26px;
    text-align: left;
    font-style: normal;
    text-transform: none;
}
.nav-container{
    margin-top: 30px;
    /* 鼠标变小手 */
    cursor: pointer;

}
.nav-container .nav-item{
    margin-left: 20px;
    width: 254px;
    height: 54px;
    margin-bottom: 20px;
    /* 圆角 */
    border-radius: 10px;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}
.nav-container .nav-item:hover {
    background: rgba(102,183,227,0.05);
}
/* 添加激活状态样式 */
.nav-container .nav-item.active{
    background: rgba(102,183,227,0.1);
}
.nav-container .nav-item img{
    width: 17px;
    height: 20px;
    margin-left: 50px;
    margin-top: 0;
    margin-right: 5px;
}
.nav-container .nav-item span{
    width: 80px;
    height: 28px;
    font-family: AppleSystemUIFont;
    font-size: 20px;
    color: #0C99DA;
    line-height: 23px;
    text-align: left;
    font-style: normal;
    text-transform: none;
}

.router-view-container {
    flex: 1;
    padding: 20px;
    background: #F5F7FA;
    height: calc(100vh - 130px);
    overflow-y: auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

.breadcrumb-separator {
  margin: 0 8px;
  color: #0C99DA;
  font-size: 16px;
  content: '>';
}
</style>
