/** 11 位大陆手机号（登录凭证） */
export const MOBILE_PHONE_RE = /^1[3-9]\d{9}$/;

/**
 * 国内座机：区号 0 开头（3~4 位），本地号 7~8 位，允许 `-`，可选分机。
 * 例：0379-8888888、010-12345678、03798888888
 */
export const LANDLINE_PHONE_RE = /^0\d{2,3}-?\d{7,8}(-\d{1,6})?$/;

export const STORE_CONTACT_PHONE_HINT = '请输入正确的联系电话（手机号或座机，如 0379-8888888）';

export function normalizeContactPhone(raw: string): string {
  return String(raw ?? '')
    .trim()
    .replace(/\s+/g, '');
}

export function isMobilePhone(raw: string): boolean {
  return MOBILE_PHONE_RE.test(normalizeContactPhone(raw));
}

export function isLandlinePhone(raw: string): boolean {
  return LANDLINE_PHONE_RE.test(normalizeContactPhone(raw));
}

/** 门店对外联系电话：手机号或座机 */
export function isStoreContactPhone(raw: string): boolean {
  const s = normalizeContactPhone(raw);
  return isMobilePhone(s) || isLandlinePhone(s);
}

/** 拨号用：去掉空格和横线 */
export function toDialablePhone(raw: string): string {
  return String(raw ?? '').replace(/[\s-]/g, '');
}

/**
 * 对外联系电话脱敏展示。
 * - 手机：138****8000
 * - 座机：保留区号，本地号中间打码，如 0379-****888 / 010-****5678
 * - 带分机时保留分机后缀
 */
export function maskContactPhone(phone?: string | null): string {
  const raw = String(phone ?? '').trim();
  if (!raw) return '—';
  const normalized = normalizeContactPhone(raw);
  if (isMobilePhone(normalized)) {
    const digits = normalized.replace(/\D/g, '');
    return `${digits.slice(0, 3)}****${digits.slice(-4)}`;
  }
  if (isLandlinePhone(normalized)) {
    const extMatch = normalized.match(/-(\d{1,6})$/);
    const hasExt = !!extMatch && normalized.indexOf('-') !== normalized.lastIndexOf('-');
    const ext = hasExt ? extMatch![1] : '';
    const main = hasExt ? normalized.slice(0, -(ext.length + 1)) : normalized;
    const digits = main.replace(/\D/g, '');
    const areaLen = digits.startsWith('01') || digits.startsWith('02') ? 3 : 4;
    const area = digits.slice(0, areaLen);
    const local = digits.slice(areaLen);
    const keepTail = Math.min(4, Math.max(2, local.length - 4));
    const maskedLocal =
      local.length <= 4 ? '*'.repeat(local.length) : `${'*'.repeat(local.length - keepTail)}${local.slice(-keepTail)}`;
    const joiner = main.includes('-') ? '-' : '';
    return ext ? `${area}${joiner}${maskedLocal}-${ext}` : `${area}${joiner}${maskedLocal}`;
  }
  const digits = normalized.replace(/\D/g, '');
  if (digits.length >= 11) return `${digits.slice(0, 3)}****${digits.slice(-4)}`;
  if (digits.length >= 7) return `${digits.slice(0, 3)}****${digits.slice(-2)}`;
  if (digits.length > 0) return `${digits.slice(0, 1)}****`;
  return '****';
}