/*
 * @Date: 2025-03-20 20:36:36
 * @LastEditors: hookehuyr hookehuyr@gmail.com
 * @LastEditTime: 2025-12-19 00:16:42
 * @FilePath: /mlaj/src/router/index.js
 * @Description: 路由实例创建和导出
 */
import { createRouter, createWebHashHistory } from 'vue-router'
import { routes } from './routes'
import { checkAuth, hasVisitedWelcome, markWelcomeVisited } from './guards'
import { getUserIsLoginAPI } from '@/api/auth'
import { getUserInfoAPI } from '@/api/users'
import { installWxShareSync } from '@/composables/useShare'
import { installOgMetaSync } from '@/utils/ogMeta'
import { resolveRouteRuntimeMeta } from './pageMetaResolver'

const router = createRouter({
  history: createWebHashHistory(import.meta.env.VITE_BASE || '/'),
  routes,
  scrollBehavior(to, from, savedPosition) {
    if (savedPosition) {
      return savedPosition
    }
    // 每次路由切换后，页面滚动到顶部
    return { top: 0, left: 0 }
  },
})

// 导航守卫
router.beforeEach(async (to, from, next) => {
  // 欢迎页访问逻辑
  if (import.meta.env.VITE_WELCOME_PAGE_ENABLED === 'true') {
    // 重置欢迎页标志(URL 参数)
    if (to.query.reset_welcome === 'true') {
      const { resetWelcomeFlag } = await import('./guards.js')
      resetWelcomeFlag()
      // 移除 URL 参数
      const query = { ...to.query }
      delete query.reset_welcome
      return next({ path: to.path, query })
    }

    // 欢迎页访问检测
    if (to.path === '/welcome') {
      if (hasVisitedWelcome()) {
        // 已访问过，跳转到首页
        return next('/')
      }
      // 首次访问，标记并显示欢迎页
      markWelcomeVisited()
    }
  }

  // 检查用户是否已登录
  const currentUser = JSON.parse(localStorage.getItem('currentUser') || 'null')
  const redirectRaw = to.query && to.query.redirect

  // 登录权限检查（不再自动触发微信授权）
  const authResult = checkAuth(to)
  if (authResult !== true) {
    next(authResult)
    return
  }

  // 登录页统一处理授权回跳与默认重定向
  if (to.path === '/login') {
    /**
     * 情况1：本地已有登录态
     * - 有 redirect：跳回来源页
     * - 无 redirect：默认跳首页
     */
    if (currentUser) {
      const redirect = redirectRaw ? decodeURIComponent(redirectRaw) : '/'
      next(redirect)
      return
    }

    /**
     * 情况2：授权回跳但本地未写入登录态
     * - 统一在路由层探测登录
     * - 登录为真：写入用户信息，并按 redirect 或首页跳转
     */
    try {
      const { code, data } = await getUserIsLoginAPI()
      if (code && data && data.is_login) {
        const { code: uiCode, data: uiData } = await getUserInfoAPI()
        if (uiCode) {
          const mergedUser = { ...uiData.user, ...uiData.checkin }
          localStorage.setItem('currentUser', JSON.stringify(mergedUser))
        }
        const redirect = redirectRaw ? decodeURIComponent(redirectRaw) : '/'
        next(redirect)
        return
      }
    } catch (e) {
      // 静默失败，进入登录页
    }
  }

  next()
})

installOgMetaSync(router, { resolver: resolveRouteRuntimeMeta })
installWxShareSync(router, { resolver: resolveRouteRuntimeMeta })

export default router