import { redirect } from "next/navigation"
import { getTranslations } from "next-intl/server"

import { requireAuth } from "@/shared/lib/auth-guard"
import { SettingsView } from "@/modules/settings/components/settings-view"
import { SettingsServiceProvider } from "@/modules/settings/components/settings-service-context"
import { resolveRoleSettingsConfig } from "@/modules/settings/config/role-settings-config"
import type { SettingsService } from "@/modules/settings/types"
import { getUserProfile } from "@/modules/users/data-access"
import { updateUserProfile } from "@/modules/users/actions"
import { getNotificationPreferences } from "@/modules/notifications/preferences"
import { updateNotificationPreferencesAction } from "@/modules/messaging/actions"
import type { UpdateNotificationPreferencesInput } from "@/modules/notifications/types"

export const dynamic = "force-dynamic"

export const metadata = {
  title: "Settings",
}

/**
 * 将通知偏好输入对象转换为 FormData，适配 updateNotificationPreferencesAction 的签名。
 * Action 内部通过 formData.get(key) === "on" 解析布尔值。
 */
function buildNotificationFormData(input: UpdateNotificationPreferencesInput): FormData {
  const formData = new FormData()
  const booleanFields: Array<keyof UpdateNotificationPreferencesInput> = [
    "emailEnabled",
    "smsEnabled",
    "pushEnabled",
    "homeworkNotifications",
    "gradeNotifications",
    "announcementNotifications",
    "messageNotifications",
    "attendanceNotifications",
    "quietHoursEnabled",
  ]
  for (const field of booleanFields) {
    const value = input[field]
    if (value === true) formData.set(field, "on")
  }
  if (input.quietHoursStart) formData.set("quietHoursStart", input.quietHoursStart)
  if (input.quietHoursEnd) formData.set("quietHoursEnd", input.quietHoursEnd)
  return formData
}

export default async function SettingsPage() {
  const ctx = await requireAuth()

  const userId = ctx.userId
  const userProfile = await getUserProfile(userId)

  if (!userProfile) redirect("/login")

  const roles = ctx.roles
  const notificationPrefs = await getNotificationPreferences(userId)
  const t = await getTranslations("settings")

  const config = resolveRoleSettingsConfig(roles)
  const description = t(config?.descriptionKey ?? "title")
  const backHref = config?.backHref ?? "/dashboard"
  const generalExtra = config?.generalExtra

  // 构建 SettingsService 实现，注入到 SettingsServiceProvider
  // 组件层通过 useSettingsService() 消费，不直接 import users/messaging actions
  const service: SettingsService = {
    profile: {
      getProfile: async () => getUserProfile(userId),
      updateProfile: async (input) => updateUserProfile(input),
    },
    notifications: {
      getPreferences: async () => getNotificationPreferences(userId),
      updatePreferences: async (input) =>
        updateNotificationPreferencesAction(null, buildNotificationFormData(input)),
    },
  }

  return (
    <SettingsServiceProvider service={service}>
      <SettingsView
        description={description}
        backHref={backHref}
        user={userProfile}
        notificationPreferences={notificationPrefs}
        generalExtra={generalExtra}
      />
    </SettingsServiceProvider>
  )
}