import type { JSX } from "react"
import { Suspense } from "react"
import Link from "next/link"
import { Plus } from "lucide-react"
import { getTranslations } from "next-intl/server"
import { Button } from "@/shared/components/ui/button"
import { Skeleton } from "@/shared/components/ui/skeleton"
import { requirePermission } from "@/shared/lib/auth-guard"
import { Permissions } from "@/shared/types/permissions"
import { getLessonPlans } from "@/modules/lesson-preparation/data-access"
import { getSubjectOptions } from "@/modules/school/data-access"
import { LessonPlanList } from "@/modules/lesson-preparation/components/lesson-plan-list"
import { LessonPlanProviderSetup } from "@/modules/lesson-preparation/providers/lesson-plan-provider-setup"

export const dynamic = "force-dynamic"

export default async function LessonPlansPage(): Promise<JSX.Element> {
  const t = await getTranslations("lessonPreparation")
  // V4 P0-2 修复：页面层补齐 requirePermission 权限校验
  const ctx = await requirePermission(Permissions.LESSON_PLAN_READ)

  const [items, subjects] = await Promise.all([
    getLessonPlans({}, ctx.dataScope, ctx.userId),
    getSubjectOptions(),
  ])

  return (
    <div className="p-6 space-y-4">
      <div className="flex justify-between items-center">
        <div>
          <h1 className="text-2xl font-bold tracking-tight">{t("title.list")}</h1>
          <p className="text-muted-foreground">
            {t("description.list")}
          </p>
        </div>
        <Button asChild>
          <Link href="/teacher/lesson-plans/new">
            <Plus className="h-4 w-4 mr-2" aria-hidden="true" />
            {t("action.new")}
          </Link>
        </Button>
      </div>
      <LessonPlanProviderSetup>
        <Suspense
          fallback={
            <div className="space-y-4">
              <div className="flex gap-2 flex-wrap items-center">
                <Skeleton className="h-9 w-[240px]" />
                <Skeleton className="h-9 w-[160px]" />
                <Skeleton className="h-9 w-[160px]" />
              </div>
              <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
                {Array.from({ length: 6 }).map((_, i) => (
                  <Skeleton key={i} className="h-[180px] w-full" />
                ))}
              </div>
            </div>
          }
        >
          <LessonPlanList initialItems={items} subjects={subjects} />
        </Suspense>
      </LessonPlanProviderSetup>
    </div>
  )
}
