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

import { requirePermission } from "@/shared/lib/auth-guard"
import { Permissions } from "@/shared/types/permissions"
import { AiProviderSettingsCard } from "@/modules/settings/components/ai-provider-settings-card"
import { AiUsageDashboard } from "@/modules/ai/components/ai-usage-dashboard"

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

export const dynamic = "force-dynamic"

/**
 * AI 统一配置页
 *
 * 作为 AI 模块的独立配置入口，取代：
 * - /settings?tab=ai（已移除 AI 标签页）
 * - 考试页面内嵌的 AI 配置弹窗（已移除）
 *
 * 权限规则：
 *   - AI_CHAT 用户均可访问（管理自己的 private provider）
 *   - AI_CONFIGURE 用户（管理员）可额外管理 public provider 与他人 private provider
 */
export default async function AiSettingsPage(): Promise<JSX.Element> {
  const t = await getTranslations("ai")
  const ctx = await requirePermission(Permissions.AI_CHAT)
  const isAdmin = ctx.permissions.includes(Permissions.AI_CONFIGURE)
  return (
    <div className="flex h-full flex-col gap-8 p-8">
      <div className="flex flex-col justify-between gap-4 md:flex-row md:items-center">
        <div className="space-y-1">
          <h1 className="text-3xl font-bold tracking-tight">{t("admin.settings.title")}</h1>
          <div className="text-sm text-muted-foreground">
            {isAdmin
              ? t("admin.settings.description")
              : t("admin.settings.userDescription")}
          </div>
        </div>
      </div>
      <div className="space-y-6">
        <AiProviderSettingsCard isAdmin={isAdmin} currentUserId={ctx.userId} />
        {isAdmin ? <AiUsageDashboard /> : null}
      </div>
    </div>
  )
}