import { createRouter, createWebHistory } from 'vue-router'
import type { RouteRecordRaw } from 'vue-router'

// 导入页面组件
import Home from '@/views/Home.vue'
import Courses from '@/views/Courses.vue'
import CourseDetail from '@/views/CourseDetail.vue'
import CourseDetailEnrolled from '@/views/CourseDetailEnrolled.vue'
import CourseStudy from '@/views/CourseStudy.vue'
import Learning from '@/views/Learning.vue'
import Profile from '@/views/Profile.vue'

import LearningPaths from '@/views/LearningPaths.vue'
import Faculty from '@/views/Faculty.vue'
import TeacherDetail from '@/views/TeacherDetail.vue'
import Resources from '@/views/Resources.vue'
import Activities from '@/views/Activities.vue'
import ActivityDetail from '@/views/ActivityDetail.vue'
import ActivityRegistration from '@/views/ActivityRegistration.vue'
import Exam from '@/views/Exam.vue'
import ExamNotice from '@/views/ExamNotice.vue'
import ExamSubmitted from '@/views/ExamSubmitted.vue'
import TestSections from '@/views/TestSections.vue'
import LocalVideoDemo from '@/views/LocalVideoDemo.vue'
import SpecialTraining from '@/views/SpecialTraining.vue'
import SpecialTrainingDetail from '@/views/SpecialTrainingDetail.vue'
import HelpCenter from '@/views/HelpCenter.vue'

const routes: RouteRecordRaw[] = [
  {
    path: '/help-center',
    name: 'HelpCenter',
    component: HelpCenter,
    meta: {
      title: '帮助中心'
    }
  },
  {
    path: '/',
    name: 'Home',
    component: Home,
    meta: {
      title: '首页'
    }
  },
  {
    path: '/courses',
    name: 'Courses',
    component: Courses,
    meta: {
      title: '课程列表'
    }
  },
  {
    path: '/course/:id',
    name: 'CourseDetail',
    component: CourseDetail,
    meta: {
      title: '课程详情'
    }
  },
  {
    path: '/course/:id/enrolled',
    name: 'CourseDetailEnrolled',
    component: CourseDetailEnrolled,
    meta: {
      title: '课程详情 - 已报名'
    }
  },
  {
    path: '/course/study/:id',
    name: 'CourseStudy',
    component: CourseStudy,
    meta: {
      title: '课程学习',
      requiresAuth: true
    }
  },
  {
    path: '/learning/:id',
    name: 'Learning',
    component: Learning,
    meta: {
      title: '学习中心',
      requiresAuth: true
    }
  },
  {
    path: '/profile',
    name: 'Profile',
    component: Profile,
    meta: {
      title: '个人中心',
      requiresAuth: true
    }
  },

  {
    path: '/learning-paths',
    name: 'LearningPaths',
    component: LearningPaths,
    meta: {
      title: '学习路径'
    }
  },
  {
    path: '/faculty',
    name: 'Faculty',
    component: Faculty,
    meta: {
      title: '师资力量'
    }
  },
  {
    path: '/teacher/:id',
    name: 'TeacherDetail',
    component: TeacherDetail,
    meta: {
      title: '讲师详情'
    }
  },
  {
    path: '/resources',
    name: 'Resources',
    component: Resources,
    meta: {
      title: '精选资源'
    }
  },
  {
    path: '/special-training',
    name: 'SpecialTraining',
    component: SpecialTraining,
    meta: {
      title: '专题训练'
    }
  },
  {
    path: '/special-training/:id',
    name: 'SpecialTrainingDetail',
    component: SpecialTrainingDetail,
    meta: {
      title: '专题训练详情'
    }
  },
  {
    path: '/activities',
    name: 'Activities',
    component: Activities,
    meta: {
      title: '全部活动'
    }
  },
  {
    path: '/activity/:id',
    name: 'ActivityDetail',
    component: ActivityDetail,
    meta: {
      title: '活动详情'
    }
  },
  {
    path: '/activity/:id/register',
    name: 'ActivityRegistration',
    component: ActivityRegistration,
    meta: {
      title: '活动报名'
    }
  },
  {
    path: '/course/:courseId/exam/:sectionId/notice',
    name: 'ExamNotice',
    component: ExamNotice,
    meta: {
      title: '考前须知'
    }
  },
  {
    path: '/course/:courseId/exam/:sectionId',
    name: 'Exam',
    component: Exam,
    meta: {
      title: '在线考试'
    }
  },
  {
    path: '/exam/submitted',
    name: 'ExamSubmitted',
    component: ExamSubmitted,
    meta: {
      title: '考试提交成功'
    }
  },
  {
    path: '/ai',
    name: 'AI',
    component: () => import('@/views/Ai.vue'),
    meta: {
      title: 'AI'
    }
  },
  {
    path: '/ai-demo',
    name: 'AIDemo',
    component: () => import('@/views/DetailView.vue'),
    meta: {
      title: 'AI演示'
    }
  },
  {
    path: '/test-sections',
    name: 'TestSections',
    component: TestSections,
    meta: {
      title: '测试章节API'
    }
  },
  {
    path: '/local-video-demo',
    name: 'LocalVideoDemo',
    component: LocalVideoDemo,
    meta: {
      title: '本地视频播放演示'
    }
  },
  {
    path: '/:pathMatch(.*)*',
    name: 'NotFound',
    component: () => import('@/views/NotFound.vue'),
    meta: {
      title: '页面未找到'
    }
  }
]

const router = createRouter({
  history: createWebHistory(),
  routes,
  scrollBehavior(_to, _from, savedPosition) {
    if (savedPosition) {
      return savedPosition
    } else {
      return { top: 0 }
    }
  }
})

// 路由守卫
router.beforeEach((to, _from, next) => {
  // 设置页面标题
  if (to.meta.title) {
    document.title = `${to.meta.title} - 在线学习平台`
  }

  // 检查是否需要登录
  if (to.meta.requiresAuth) {
    // 检查用户登录状态
    const token = localStorage.getItem('token')
    if (!token) {
      // 未登录时跳转到首页，用户可以通过模态框登录
      next('/')
      return
    }
  }

  next()
})

export default router