const OCR_FIELD_LABELS: Record<string, string> = {
  invoiceCode: "发票代码",
  invoiceNumber: "发票号码",
  invoiceDate: "开票日期",
  totalAmount: "总金额",
  sellerName: "销售方",
};

export function parseMissingInvoiceOcrFields(rawError: string | null | undefined) {
  if (typeof rawError !== "string") {
    return [];
  }

  const matched = rawError.match(/^missing_required_fields:(.+)$/);
  if (!matched?.[1]) {
    return [];
  }

  return matched[1]
    .split(",")
    .map((field) => field.trim())
    .filter(Boolean);
}

export function formatInvoiceOcrFieldLabels(fields: string[]) {
  return fields.map((field) => OCR_FIELD_LABELS[field] ?? field);
}

export function formatInvoiceOcrErrorMessage(rawError: string | null | undefined) {
  const missingFields = parseMissingInvoiceOcrFields(rawError);
  if (missingFields.length) {
    return `票据识别缺少关键字段：${formatInvoiceOcrFieldLabels(missingFields).join("、")}。`;
  }

  if (rawError === "duplicate_invoice_code_number") {
    return "已识别出相同发票，不能重复添加。";
  }

  if (rawError === "mock_ocr_failed") {
    return "票据识别失败，请重试或人工补齐关键信息。";
  }

  if (!rawError) {
    return "票据识别失败，请稍后重试。";
  }

  return rawError;
}