"use server"

import { revalidatePath } from "next/cache"
import { getTranslations } from "next-intl/server"
import { requirePermission } from "@/shared/lib/auth-guard"
import { Permissions } from "@/shared/types/permissions"
import type { ActionState } from "@/shared/types/action-state"
import { handleActionError } from "@/shared/lib/action-utils"

import {
  saveGradeDraft,
  getGradeDraft,
  deleteGradeDraft,
  type GradeDraftData,
} from "./data-access-drafts"
import { assertClassInScope } from "./lib/scope-check"

/**
 * P1-1 拆分：从 actions.ts 抽取的成绩录入草稿 Server Actions。
 * 对应 data-access 的 saveGradeDraft / getGradeDraft / deleteGradeDraft。
 */

/**
 * 保存成绩录入草稿到服务端（跨设备同步）。
 */
export async function saveGradeDraftAction(params: {
  classId: string
  subjectId: string
  type: string
  scores: Record<string, string>
}): Promise<ActionState<{ saved: true }>> {
  try {
    const ctx = await requirePermission(Permissions.GRADE_RECORD_MANAGE)
    const t = await getTranslations("grades")

    // 校验班级权限
    const scopeError = assertClassInScope(ctx.dataScope, params.classId)
    if (scopeError) {
      return { success: false, message: t(`action.scopeError.${scopeError}`) }
    }

    const data: GradeDraftData = {
      scores: params.scores,
      timestamp: Date.now(),
    }

    await saveGradeDraft({
      userId: ctx.userId,
      classId: params.classId,
      subjectId: params.subjectId,
      type: params.type,
      data,
    })

    return { success: true, data: { saved: true } }
  } catch (e) {
    return handleActionError(e)
  }
}

/**
 * 获取成绩录入草稿（跨设备恢复）。
 */
export async function getGradeDraftAction(params: {
  classId: string
  subjectId: string
  type: string
}): Promise<ActionState<GradeDraftData | null>> {
  try {
    const ctx = await requirePermission(Permissions.GRADE_RECORD_READ)
    const t = await getTranslations("grades")

    // 校验班级权限
    const scopeError = assertClassInScope(ctx.dataScope, params.classId)
    if (scopeError) {
      return { success: false, message: t(`action.scopeError.${scopeError}`) }
    }

    const draft = await getGradeDraft({
      userId: ctx.userId,
      classId: params.classId,
      subjectId: params.subjectId,
      type: params.type,
    })

    return { success: true, data: draft }
  } catch (e) {
    return handleActionError(e)
  }
}

/**
 * 删除成绩录入草稿（提交成功后调用）。
 */
export async function deleteGradeDraftAction(params: {
  classId: string
  subjectId: string
  type: string
}): Promise<ActionState<{ deleted: true }>> {
  try {
    const ctx = await requirePermission(Permissions.GRADE_RECORD_MANAGE)
    const t = await getTranslations("grades")

    // 校验班级权限
    const scopeError = assertClassInScope(ctx.dataScope, params.classId)
    if (scopeError) {
      return { success: false, message: t(`action.scopeError.${scopeError}`) }
    }

    await deleteGradeDraft({
      userId: ctx.userId,
      classId: params.classId,
      subjectId: params.subjectId,
      type: params.type,
    })

    revalidatePath("/teacher/grades")
    return { success: true, data: { deleted: true } }
  } catch (e) {
    return handleActionError(e)
  }
}