import { createRouter, createWebHistory } from "vue-router"
import type { RouteRecordRaw } from "vue-router"
import { nextTick } from "vue"
import { useAuthStore } from "@/stores/auth"
import { convertMenusToRoutes } from "@/utils/menu"
import "@/types/router"

// 基础路由（不需要动态加载的）
const baseRoutes: RouteRecordRaw[] = [
  {
    path: "/:tenantCode/login",
    name: "Login",
    component: () => import("@/views/auth/Login.vue"),
    meta: { requiresAuth: false },
  },
  {
    path: "/login",
    name: "LoginFallback",
    component: () => import("@/views/auth/Login.vue"),
    meta: { requiresAuth: false },
  },
  {
    path: "/:tenantCode",
    name: "Main",
    component: () => import("@/layouts/BasicLayout.vue"),
    // 不设置固定redirect，由路由守卫根据用户菜单动态跳转到第一个可见菜单
    meta: {},
    children: [
      // 创建比赛路由（不需要在菜单中显示）
      {
        path: "contests/create",
        name: "ContestsCreate",
        component: () => import("@/views/contests/Create.vue"),
        meta: {
          title: "创建比赛",
          requiresAuth: true,
          permissions: ["contest:create"],
        },
      },
      // 赛事详情路由（不需要在菜单中显示）
      {
        path: "contests/:id",
        name: "ContestsDetail",
        component: () => import("@/views/contests/Detail.vue"),
        meta: {
          title: "赛事详情",
          requiresAuth: true,
          permissions: ["contest:read", "activity:read"],
        },
      },
      // 编辑比赛路由（不需要在菜单中显示）
      {
        path: "contests/:id/edit",
        name: "ContestsEdit",
        component: () => import("@/views/contests/Create.vue"),
        meta: {
          title: "编辑比赛",
          requiresAuth: true,
          permissions: ["contest:update"],
        },
      },
      // 赛事评委管理路由（不需要在菜单中显示）
      {
        path: "contests/:id/judges",
        name: "ContestsJudges",
        component: () => import("@/views/contests/judges/Index.vue"),
        meta: {
          title: "评委管理",
          requiresAuth: true,
          permissions: ["contest:read"],
        },
      },
      // 个人赛报名路由
      {
        path: "contests/:id/register/individual",
        name: "ContestsRegisterIndividual",
        component: () => import("@/views/contests/RegisterIndividual.vue"),
        meta: {
          title: "赛事报名（个人赛）",
          requiresAuth: true,
        },
      },
      // 团队赛报名路由
      {
        path: "contests/:id/register/team",
        name: "ContestsRegisterTeam",
        component: () => import("@/views/contests/RegisterTeam.vue"),
        meta: {
          title: "赛事报名（团队赛）",
          requiresAuth: true,
        },
      },
      // 报名管理列表路由
      {
        path: "contests/registrations",
        name: "ContestsRegistrations",
        component: () => import("@/views/contests/registrations/Index.vue"),
        meta: {
          title: "报名管理",
          requiresAuth: true,
          permissions: ["registration:read", "contest:read"],
        },
      },
      // 报名记录路由
      {
        path: "contests/registrations/:id/records",
        name: "RegistrationRecords",
        component: () => import("@/views/contests/registrations/Records.vue"),
        meta: {
          title: "报名记录",
          requiresAuth: true,
          permissions: ["registration:read", "contest:read"],
        },
      },
      // 评审进度详情路由
      {
        path: "contests/reviews/:id/progress",
        name: "ReviewProgressDetail",
        component: () => import("@/views/contests/reviews/ProgressDetail.vue"),
        meta: {
          title: "评审进度详情",
          requiresAuth: true,
        },
      },
      // 赛果发布详情路由
      {
        path: "contests/results/:id",
        name: "ContestsResultsDetail",
        component: () => import("@/views/contests/results/Detail.vue"),
        meta: {
          title: "赛果发布详情",
          requiresAuth: true,
        },
      },
      // 参赛作品详情列表路由
      {
        path: "contests/works/:id/list",
        name: "WorksDetail",
        component: () => import("@/views/contests/works/WorksDetail.vue"),
        meta: {
          title: "参赛作品详情",
          requiresAuth: true,
          permissions: ["work:read"],
        },
      },
      // 作业提交记录路由
      {
        path: "homework/submissions",
        name: "HomeworkSubmissions",
        component: () => import("@/views/homework/Submissions.vue"),
        meta: {
          title: "作业提交记录",
          requiresAuth: true,
          permissions: ["homework:read"],
        },
      },
      // 学生作业详情路由
      {
        path: "homework/detail/:id",
        name: "HomeworkDetail",
        component: () => import("@/views/homework/StudentDetail.vue"),
        meta: {
          title: "作业详情",
          requiresAuth: true,
          permissions: ["homework:read"],
        },
      },
      // 教师我的指导路由
      {
        path: "student-activities/guidance",
        name: "TeacherGuidance",
        component: () => import("@/views/contests/Guidance.vue"),
        meta: {
          title: "我的指导",
          requiresAuth: true,
          permissions: ["activity:read"],
        },
      },
      // 评委评审详情页
      {
        path: "activities/review/:id",
        name: "ReviewDetail",
        component: () => import("@/views/activities/ReviewDetail.vue"),
        meta: {
          title: "作品评审",
          requiresAuth: true,
        },
      },
      // 预设评语页面
      {
        path: "activities/preset-comments",
        name: "PresetComments",
        component: () => import("@/views/activities/PresetComments.vue"),
        meta: {
          title: "预设评语",
          requiresAuth: true,
        },
      },
      // 3D建模实验室路由（工作台模块下）
      {
        path: "workbench/3d-lab",
        name: "3DModelingLab",
        component: () => import("@/views/workbench/ai-3d/Index.vue"),
        meta: {
          title: "3D建模实验室",
          requiresAuth: true,
          hideSidebar: true,
        },
      },
      // 3D模型生成页面
      {
        path: "workbench/3d-lab/generate/:taskId",
        name: "AI3DGenerate",
        component: () => import("@/views/workbench/ai-3d/Generate.vue"),
        meta: {
          title: "3D模型生成",
          requiresAuth: true,
          hideSidebar: true,
        },
      },
      // 3D创作历史页面
      {
        path: "workbench/3d-lab/history",
        name: "AI3DHistory",
        component: () => import("@/views/workbench/ai-3d/History.vue"),
        meta: {
          title: "创作历史",
          requiresAuth: true,
          hideSidebar: true,
        },
      },
      // 3D模型预览页面
      {
        path: "workbench/model-viewer",
        name: "ModelViewer",
        component: () => import("@/views/model/ModelViewer.vue"),
        meta: {
          title: "3D模型预览",
          requiresAuth: true,
          hideSidebar: true,
        },
      },
      // 动态路由将在这里添加
    ],
  },
  {
    path: "/403",
    name: "Forbidden",
    component: () => import("@/views/error/403.vue"),
    meta: { requiresAuth: false },
  },
  {
    path: "/:pathMatch(.*)*",
    name: "NotFound",
    component: () => import("@/views/error/404.vue"),
  },
]

const router = createRouter({
  history: createWebHistory(import.meta.env.BASE_URL),
  routes: baseRoutes,
})

// 标记是否已经添加了动态路由
let dynamicRoutesAdded = false
// 保存已添加的路由名称，用于清理
let addedRouteNames: string[] = []
// 保存上次的菜单数据，用于检测变化
let lastMenusHash: string = ""

/**
 * 重置动态路由标记（用于登出或切换用户时）
 */
export function resetDynamicRoutes(): void {
  dynamicRoutesAdded = false
  addedRouteNames = []
  lastMenusHash = ""
}

/**
 * 添加动态路由
 * @returns Promise，当路由添加完成并生效后 resolve
 */
export async function addDynamicRoutes(): Promise<void> {
  const authStore = useAuthStore()
  if (!authStore.menus || authStore.menus.length === 0) {
    // 如果没有菜单，重置标记
    if (dynamicRoutesAdded) {
      resetDynamicRoutes()
    }
    return
  }

  // 计算菜单数据的哈希值，用于检测变化
  const menusHash = JSON.stringify(
    authStore.menus.map((m) => ({ id: m.id, path: m.path }))
  )

  // 如果菜单数据没有变化且已经添加过路由，直接返回
  if (dynamicRoutesAdded && menusHash === lastMenusHash) {
    return
  }

  // 如果已经添加过路由，先移除旧路由
  if (dynamicRoutesAdded && addedRouteNames.length > 0) {
    addedRouteNames.forEach((routeName) => {
      if (router.hasRoute(routeName)) {
        router.removeRoute(routeName)
      }
    })
    addedRouteNames = []
  }

  // 将菜单转换为路由
  const dynamicRoutes = convertMenusToRoutes(authStore.menus)

  if (dynamicRoutes.length === 0) {
    return
  }

  // 添加动态路由到根路由下
  dynamicRoutes.forEach((route) => {
    router.addRoute("Main", route)
    if (route.name) {
      addedRouteNames.push(route.name as string)
    }
  })

  dynamicRoutesAdded = true
  lastMenusHash = menusHash

  // 等待多个 tick，确保路由已完全注册
  await nextTick()
  await nextTick()
  await nextTick()

  // 额外等待一小段时间，确保路由系统完全更新
  await new Promise((resolve) => setTimeout(resolve, 50))
}

/**
 * 从路径中提取租户编码
 */
function extractTenantCodeFromPath(path: string): string | null {
  const match = path.match(/^\/([^/]+)/)
  return match ? match[1] : null
}

/**
 * 构建带租户编码的路径
 */
function buildPathWithTenantCode(tenantCode: string, path: string): string {
  // 如果路径已经包含租户编码，直接返回
  if (path.startsWith(`/${tenantCode}/`)) {
    return path
  }
  // 移除开头的斜杠（如果有）
  const cleanPath = path.startsWith("/") ? path.slice(1) : path
  // 如果路径是根路径，返回租户编码根路径（路由守卫会处理跳转到第一个菜单）
  if (cleanPath === "" || cleanPath === tenantCode) {
    return `/${tenantCode}`
  }
  return `/${tenantCode}/${cleanPath}`
}

router.beforeEach(async (to, _from, next) => {
  const authStore = useAuthStore()

  // 从URL中提取租户编码
  const tenantCodeFromUrl = extractTenantCodeFromPath(to.path)

  // 如果 token 存在但用户信息不存在，先获取用户信息
  if (authStore.token && !authStore.user) {
    try {
      const userInfo = await authStore.fetchUserInfo()

      // 如果获取用户信息失败或用户信息为空，跳转到登录页
      if (!userInfo) {
        authStore.logout()
        const tenantCode =
          tenantCodeFromUrl || extractTenantCodeFromPath(to.path)
        if (tenantCode) {
          next({
            path: `/${tenantCode}/login`,
            query: { redirect: to.fullPath },
          })
        } else {
          next({ name: "LoginFallback", query: { redirect: to.fullPath } })
        }
        return
      }

      // 获取用户信息后，检查租户编码一致性
      const userTenantCode = userInfo?.tenantCode
      if (userTenantCode) {
        // 如果URL中的租户编码与用户信息不一致，更正URL
        if (tenantCodeFromUrl && tenantCodeFromUrl !== userTenantCode) {
          const correctedPath = buildPathWithTenantCode(
            userTenantCode,
            to.path.replace(`/${tenantCodeFromUrl}`, "")
          )
          next({ path: correctedPath, query: to.query, replace: true })
          return
        }
        // 如果URL中没有租户编码，添加租户编码
        if (!tenantCodeFromUrl) {
          const correctedPath = buildPathWithTenantCode(userTenantCode, to.path)
          next({ path: correctedPath, query: to.query, replace: true })
          return
        }
      }
      // 获取用户信息后，添加动态路由并等待生效
      await addDynamicRoutes()
      // 保存原始目标路径
      const targetPath = to.fullPath
      // 路由已生效，重新解析目标路由
      const resolved = router.resolve(targetPath)
      // 如果解析后的路由不是404，说明路由存在，重新导航
      if (resolved.name !== "NotFound") {
        next({ path: targetPath, replace: true })
      } else {
        // 如果路由不存在，尝试重定向到用户第一个菜单
        if (authStore.menus && authStore.menus.length > 0) {
          const findFirstMenuPath = (menus: any[]): string | null => {
            for (const menu of menus) {
              if (menu.path && menu.component) {
                // 移除开头的斜杠
                return menu.path.startsWith("/")
                  ? menu.path.slice(1)
                  : menu.path
              }
              if (menu.children && menu.children.length > 0) {
                const childPath = findFirstMenuPath(menu.children)
                if (childPath) return childPath
              }
            }
            return null
          }

          const firstMenuPath = findFirstMenuPath(authStore.menus)
          if (firstMenuPath) {
            const user = authStore.user as { tenantCode?: string } | null
            const userTenantCode = user?.tenantCode
            const tenantCode =
              tenantCodeFromUrl ||
              extractTenantCodeFromPath(to.path) ||
              userTenantCode
            if (tenantCode) {
              next({ path: `/${tenantCode}/${firstMenuPath}`, replace: true })
              return
            }
          }
        }

        // 如果路由不存在，但需要认证，跳转到登录页（而不是404）
        if (to.meta.requiresAuth === false) {
          // 路由确实不存在，允许继续（会显示404页面）
          next()
        } else {
          const tenantCode =
            tenantCodeFromUrl || extractTenantCodeFromPath(to.path)
          if (tenantCode) {
            next({
              path: `/${tenantCode}/login`,
              query: { redirect: to.fullPath },
            })
          } else {
            next({ name: "LoginFallback", query: { redirect: to.fullPath } })
          }
        }
      }
      return
    } catch (error) {
      // 获取失败，清除 token 并跳转到登录页
      console.error("获取用户信息失败:", error)
      authStore.logout()
      const tenantCode = tenantCodeFromUrl || extractTenantCodeFromPath(to.path)
      if (tenantCode) {
        next({
          path: `/${tenantCode}/login`,
          query: { redirect: to.fullPath },
        })
      } else {
        next({ name: "LoginFallback", query: { redirect: to.fullPath } })
      }
      return
    }
  }

  // 如果 token 不存在，但需要认证，跳转到登录页
  if (!authStore.token && to.meta.requiresAuth !== false) {
    const tenantCode = tenantCodeFromUrl || extractTenantCodeFromPath(to.path)
    if (tenantCode) {
      next({
        path: `/${tenantCode}/login`,
        query: { redirect: to.fullPath },
      })
    } else {
      next({ name: "LoginFallback", query: { redirect: to.fullPath } })
    }
    return
  }

  // 如果已登录，检查租户编码一致性
  if (authStore.isAuthenticated && authStore.user) {
    const userTenantCode = authStore.user.tenantCode
    if (userTenantCode) {
      // 如果URL中的租户编码与用户信息不一致，更正URL
      if (tenantCodeFromUrl && tenantCodeFromUrl !== userTenantCode) {
        const correctedPath = buildPathWithTenantCode(
          userTenantCode,
          to.path.replace(`/${tenantCodeFromUrl}`, "")
        )
        next({ path: correctedPath, query: to.query, replace: true })
        return
      }
      // 如果URL中没有租户编码，添加租户编码（排除不需要认证的特殊路由）
      const skipTenantCodePaths = ["/login", "/403"]
      const shouldSkipTenantCode = skipTenantCodePaths.some(p => to.path.startsWith(p))
      if (!tenantCodeFromUrl && !shouldSkipTenantCode) {
        const correctedPath = buildPathWithTenantCode(userTenantCode, to.path)
        next({ path: correctedPath, query: to.query, replace: true })
        return
      }
    }
  }

  // 如果已登录且有菜单数据，添加或更新动态路由
  if (authStore.isAuthenticated && authStore.menus.length > 0) {
    // 保存添加路由前的状态
    const wasRoutesAdded = dynamicRoutesAdded

    // 添加或更新动态路由
    await addDynamicRoutes()

    // 如果这是第一次添加路由，需要重新导航
    if (!wasRoutesAdded && dynamicRoutesAdded) {
      // 等待路由完全生效
      await nextTick()
      await nextTick()

      // 保存原始目标路径
      const targetPath = to.fullPath
      // 路由已生效，重新解析目标路由
      const resolved = router.resolve(targetPath)

      // 如果访问的是主路由，重定向到第一个菜单
      const isMainRoute = to.name === "Main"

      console.log('Route guard debug:', {
        targetPath,
        resolvedName: resolved.name,
        resolvedPath: resolved.path,
        isMainRoute,
        toName: to.name,
        toPath: to.path,
      })

      // 如果解析后的路由不是404，说明路由存在，重新导航
      if (resolved.name !== "NotFound" && !isMainRoute) {
        next({ path: targetPath, replace: true })
        return
      }

      // 如果路由不存在或是主路由，尝试重定向到用户第一个菜单
      if (authStore.menus && authStore.menus.length > 0) {
        const findFirstMenuPath = (menus: any[]): string | null => {
          for (const menu of menus) {
            if (menu.path && menu.component) {
              // 移除开头的斜杠
              return menu.path.startsWith("/") ? menu.path.slice(1) : menu.path
            }
            if (menu.children && menu.children.length > 0) {
              const childPath = findFirstMenuPath(menu.children)
              if (childPath) return childPath
            }
          }
          return null
        }

        const firstMenuPath = findFirstMenuPath(authStore.menus)
        if (firstMenuPath) {
          const userTenantCode = authStore.user
            ? (authStore.user.tenantCode as string | undefined)
            : undefined
          const tenantCode =
            tenantCodeFromUrl ||
            extractTenantCodeFromPath(to.path) ||
            userTenantCode
          if (tenantCode) {
            // 再次等待，确保路由完全注册
            await nextTick()
            next({ path: `/${tenantCode}/${firstMenuPath}`, replace: true })
            return
          }
        }
      }

      // 如果没有任何菜单，跳转到404页面
      const tenantCodeFor404 =
        tenantCodeFromUrl ||
        extractTenantCodeFromPath(to.path) ||
        (authStore.user
          ? (authStore.user.tenantCode as string | undefined)
          : undefined)
      if (tenantCodeFor404) {
        next({ path: `/${tenantCodeFor404}/404`, replace: true })
      } else {
        next({ name: "NotFound" })
      }
      return
    }
  }

  // 如果已登录且有菜单，但路由已添加，检查当前路由是否存在
  if (
    authStore.isAuthenticated &&
    authStore.menus.length > 0 &&
    dynamicRoutesAdded
  ) {
    const resolved = router.resolve(to.fullPath)
    // 如果访问的是 Main 路由（无具体子路径）或路由不存在，重定向到用户第一个菜单
    const isMainRouteWithoutChild = to.name === "Main" || to.matched.length === 1 && to.matched[0].name === "Main"
    if (
      (resolved.name === "NotFound" || isMainRouteWithoutChild) &&
      to.name !== "Login" &&
      to.name !== "LoginFallback"
    ) {
      const findFirstMenuPath = (menus: any[]): string | null => {
        for (const menu of menus) {
          if (menu.path && menu.component) {
            return menu.path.startsWith("/") ? menu.path.slice(1) : menu.path
          }
          if (menu.children && menu.children.length > 0) {
            const childPath = findFirstMenuPath(menu.children)
            if (childPath) return childPath
          }
        }
        return null
      }

      const firstMenuPath = findFirstMenuPath(authStore.menus)
      if (firstMenuPath) {
        const userTenantCode = authStore.user
          ? (authStore.user.tenantCode as string | undefined)
          : undefined
        const tenantCode =
          tenantCodeFromUrl ||
          extractTenantCodeFromPath(to.path) ||
          userTenantCode
        if (tenantCode) {
          next({ path: `/${tenantCode}/${firstMenuPath}`, replace: true })
          return
        }
      }

      // 如果没有任何菜单，跳转到404页面
      const tenantCodeFor404 =
        tenantCodeFromUrl ||
        extractTenantCodeFromPath(to.path) ||
        (authStore.user
          ? (authStore.user.tenantCode as string | undefined)
          : undefined)
      if (tenantCodeFor404) {
        next({ path: `/${tenantCodeFor404}/404`, replace: true })
        return
      }
    }
  }

  // 检查是否需要认证
  if (to.meta.requiresAuth !== false) {
    // 如果没有 token，跳转到登录页
    if (!authStore.token) {
      const tenantCode = tenantCodeFromUrl || extractTenantCodeFromPath(to.path)
      if (tenantCode) {
        next({
          path: `/${tenantCode}/login`,
          query: { redirect: to.fullPath },
        })
      } else {
        next({ name: "LoginFallback", query: { redirect: to.fullPath } })
      }
      return
    }
    // 如果有 token 但没有用户信息，跳转到登录页
    if (!authStore.user) {
      const tenantCode = tenantCodeFromUrl || extractTenantCodeFromPath(to.path)
      if (tenantCode) {
        next({
          path: `/${tenantCode}/login`,
          query: { redirect: to.fullPath },
        })
      } else {
        next({ name: "LoginFallback", query: { redirect: to.fullPath } })
      }
      return
    }
  }

  // 如果已登录，访问登录页则重定向到首页
  if (
    (to.name === "Login" || to.name === "LoginFallback") &&
    authStore.isAuthenticated
  ) {
    // 确保动态路由已添加并等待生效
    if (!dynamicRoutesAdded && authStore.menus.length > 0) {
      await addDynamicRoutes()
    }
    // 重定向到带租户编码的根路径（路由守卫会处理跳转到第一个菜单）
    const userTenantCode = authStore.user?.tenantCode || "default"
    next({ path: `/${userTenantCode}` })
    return
  }

  // 处理登录页面的租户编码
  if (to.name === "LoginFallback" && !tenantCodeFromUrl) {
    // 如果访问的是 /login，但没有租户编码，检查是否有用户信息中的租户编码
    if (authStore.isAuthenticated && authStore.user?.tenantCode) {
      const userTenantCode = authStore.user.tenantCode
      next({ path: `/${userTenantCode}/login`, replace: true })
      return
    }
    // 如果没有租户编码，允许访问（会显示租户输入框）
    next()
    return
  }

  // 检查角色权限
  const requiredRoles = to.meta.roles
  if (requiredRoles && requiredRoles.length > 0) {
    if (!authStore.hasAnyRole(requiredRoles)) {
      // 没有所需角色，跳转到 403 页面
      next({ name: "Forbidden" })
      return
    }
  }

  // 检查权限
  const requiredPermissions = to.meta.permissions
  if (requiredPermissions && requiredPermissions.length > 0) {
    if (!authStore.hasAnyPermission(requiredPermissions)) {
      // 没有所需权限，跳转到 403 页面
      next({ name: "Forbidden" })
      return
    }
  }

  next()
})

export default router