import type { ZodIssue } from "zod"

const FIELD_LABELS: Record<string, string> = {
  type: "类型",
  title: "标题",
  description: "描述",
  aspectRatio: "宽高比",
  categoryId: "分类",
  images: "图片",
  tagIds: "标签",
  url: "图片地址",
  sortOrder: "排序",
  name: "名称",
  slug: "标识",
  image: "封面图片",
  parentId: "上级分类",
  icon: "图标",
  content: "内容",
  summary: "摘要",
  cover: "封面图",
  status: "状态",
  cardIds: "关联卡片",
  cardId: "卡片 ID",
  articleIds: "关联文章",
}

function fieldLabel(path: readonly (string | number)[]): string {
  const key = path.join(".")
  return FIELD_LABELS[key] || key || "字段"
}

export function formatZodErrors(issues: ZodIssue[]): string {
  if (issues.length === 0) return "请求数据有误"

  const first = issues[0]!
  const label = fieldLabel(first.path as (string | number)[])

  // Use the built-in message if available and specific enough
  if (first.message && first.message !== "Required") {
    return first.message
  }

  switch (first.code) {
    case "too_small":
      return `${label}不能为空`
    case "too_big":
      return `${label}太长`
    case "invalid_type":
      return `${label}格式不正确`
    default:
      return `${label}: ${first.message}`
  }
}

/**
 * Wraps a Zod schema parse and throws a 422 with Chinese message on failure
 */
export function validate<T>(
  schema: {
    safeParse: (data: unknown) =>
      | { success: true; data: T }
      | { success: false; error: { issues: ZodIssue[] } }
  },
  data: unknown,
): T {
  const result = schema.safeParse(data)
  if (!result.success) {
    throw createError({
      statusCode: 422,
      statusMessage: formatZodErrors(result.error.issues),
    })
  }
  return result.data
}