import type { Metadata } from "next"
import { UserX } from "lucide-react"
import { getTranslations } from "next-intl/server"

import { getStudentClasses, getStudentSchedule } from "@/modules/classes/data-access"
import { getCurrentStudentUser } from "@/modules/users/data-access"
import { StudentScheduleFilters } from "@/modules/student/components/student-schedule-filters"
import { StudentScheduleView } from "@/modules/student/components/student-schedule-view"
import { requirePermission } from "@/shared/lib/auth-guard"
import { Permissions } from "@/shared/types/permissions"
import { EmptyState } from "@/shared/components/ui/empty-state"
import { getParam, type SearchParams } from "@/shared/lib/search-params"

export const dynamic = "force-dynamic"

export async function generateMetadata(): Promise<Metadata> {
  const t = await getTranslations("classes")
  return {
    title: `${t("metadata.studentSchedule")} - Next_Edu`,
    description: t("metadata.studentSchedule"),
  }
}

export default async function StudentSchedulePage({
  searchParams,
}: {
  searchParams: Promise<SearchParams>
}) {
  const t = await getTranslations("student")
  await requirePermission(Permissions.CLASS_READ)
  const student = await getCurrentStudentUser()
  if (!student) {
    return (
      <div className="space-y-8">
        <div>
          <h2 className="text-2xl font-bold tracking-tight">{t("schedule.title")}</h2>
          <p className="text-muted-foreground">{t("schedule.description")}</p>
        </div>
        <EmptyState
          title={t("schedule.noUser")}
          description={t("schedule.noUserDesc")}
          icon={UserX}
        />
      </div>
    )
  }

  const [sp, classes, schedule] = await Promise.all([
    searchParams,
    getStudentClasses(student.id),
    getStudentSchedule(student.id),
  ])

  const classId = getParam(sp, "classId") ?? "all"
  const filteredItems =
    classId !== "all" ? schedule.filter((s) => s.classId === classId) : schedule

  return (
    <div className="space-y-8">
      <div className="flex flex-col justify-between gap-4 md:flex-row md:items-center">
        <div>
          <h2 className="text-2xl font-bold tracking-tight">{t("schedule.title")}</h2>
          <p className="text-muted-foreground">{t("schedule.description")}</p>
        </div>
        <StudentScheduleFilters classes={classes} />
      </div>
      <StudentScheduleView items={filteredItems} />
    </div>
  )
}