"use server"

import { z } from "zod"

import type { ActionState } from "@/shared/types/action-state"
import { requirePermission } from "@/shared/lib/auth-guard"
import { Permissions } from "@/shared/types/permissions"
import { sendNotification } from "@/modules/notifications/dispatcher"
import type { NotificationChannel } from "@/modules/notifications/types"

const TestNotificationSchema = z.object({
  channel: z.enum(["push", "email", "sms"]),
})

type TestNotificationInput = z.infer<typeof TestNotificationSchema>

/** 将表单渠道名映射到 dispatcher 渠道名 */
const CHANNEL_MAP: Record<TestNotificationInput["channel"], NotificationChannel> = {
  push: "in_app",
  email: "email",
  sms: "sms",
}

/**
 * 发送测试通知
 *
 * 向当前用户发送一条测试通知，用于验证通知渠道是否配置正确。
 * 调用 notifications/dispatcher.sendNotification 发送真实通知。
 */
export async function sendTestNotificationAction(
  input: TestNotificationInput
): Promise<ActionState<null>> {
  try {
    const ctx = await requirePermission(Permissions.USER_PROFILE_UPDATE)

    const parsed = TestNotificationSchema.parse(input)
    const targetChannel = CHANNEL_MAP[parsed.channel]

    const payload = {
      userId: ctx.userId,
      title: "Test Notification",
      content: `This is a test notification sent via the ${parsed.channel} channel at ${new Date().toISOString()}.`,
      type: "info" as const,
      metadata: { test: true, channel: parsed.channel },
    }

    const results = await sendNotification(payload)

    // 检查目标渠道的发送结果
    const targetResult = results.find((r) => r.channel === targetChannel)
    if (!targetResult || !targetResult.success) {
      const errorMsg = targetResult?.error ?? `Failed to send via ${parsed.channel} channel`
      return { success: false, message: errorMsg, data: null }
    }

    return { success: true, data: null }
  } catch (error) {
    const message = error instanceof Error ? error.message : "Failed to send test notification"
    return { success: false, message }
  }
}