const LEADING_SMS_SIGNATURE = /^【[^】]+】/;
const FORBIDDEN_SMS_SIGNATURE_CHARACTER = /[\p{White_Space}\p{Cc}\p{Default_Ignorable_Code_Point}]/u;
export const SMS_SIGNATURE_CHARACTER_ERROR = '短信签名不能包含空格、换行或不可见字符';
export const SMS_SIGNATURE_FORMAT_ERROR = '必须填写完整中文黑括号签名，例如：【某某科技】';

export function formatSmsSignature(name?: string | null) {
  const innerName = (name ?? '').trim().replace(/^[【\[]+|[】\]]+$/g, '').trim();
  return innerName ? `【${innerName}】` : '';
}

export function isCompleteSmsSignature(name?: string | null) {
  return getSmsSignatureValidationError(name) === undefined;
}

export function hasForbiddenSmsSignatureCharacter(name?: string | null) {
  return FORBIDDEN_SMS_SIGNATURE_CHARACTER.test(name ?? '');
}

export function getSmsSignatureValidationError(name?: string | null) {
  const value = name ?? '';
  if (!value) {
    return SMS_SIGNATURE_FORMAT_ERROR;
  }
  if (hasForbiddenSmsSignatureCharacter(value)) {
    return SMS_SIGNATURE_CHARACTER_ERROR;
  }
  const match = value.match(/^【([^【】]+)】$/);
  return match ? undefined : SMS_SIGNATURE_FORMAT_ERROR;
}

export function replaceLeadingSmsSignature(content: string, signatureName?: string | null) {
  const body = content.replace(LEADING_SMS_SIGNATURE, '');
  return `${formatSmsSignature(signatureName)}${body}`;
}