function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
/**
 * 域名补全工具函数（框架占位符）
 * TODO: 实现完整的补全逻辑
 */

import { COMMON_EMAIL_DOMAINS } from "../constants/emailDomains";

/**
 * 获取邮箱域名补全建议
 * @param input 用户输入
 * @param domains 域名列表
 * @returns 补全建议列表
 * 
 * @example
 * getEmailSuggestions('user@g', COMMON_EMAIL_DOMAINS) 
 * // 返回: ['user@gmail.com']
 */
export function getEmailSuggestions(input) {
  var domains = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : COMMON_EMAIL_DOMAINS;
  if (!input.includes('@')) {
    return [];
  }
  var _input$split = input.split('@'),
    _input$split2 = _slicedToArray(_input$split, 2),
    localPart = _input$split2[0],
    partialDomain = _input$split2[1];
  if (!localPart) {
    return [];
  }

  // 过滤匹配的域名
  var matchedDomains = domains.filter(function (domain) {
    return domain.toLowerCase().startsWith(partialDomain.toLowerCase());
  });

  // 返回完整邮箱建议
  return matchedDomains.map(function (domain) {
    return "".concat(localPart, "@").concat(domain);
  });
}