/// <reference path="./_a_Object.d.ts" />
if (typeof Storage == 'undefined') {
  class Storage {}
}

class lStorage extends Storage {
  private prefix = '';
  constructor(prefix = '') {
    super();
    this.prefix = prefix;
  }

  has(key: string | number) {
    return !!localStorage[this.prefix + key] && !!localStorage[this.prefix + key].length;
  }

  /**
   * See {@link localStorage.getItem}
   * @param key
   * @returns
   */
  get(key: string | number) {
    if (!this.has(this.prefix + key)) {
      return false;
    }
    const data = localStorage[this.prefix + key];
    try {
      return JSON.parse(data);
    } catch (e) {
      return data;
    }
  }

  set(key: string, value: string) {
    try {
      localStorage.setItem(this.prefix + key, JSON.stringify(value));
    } catch (e) {
      localStorage.setItem(this.prefix + key, value);
    }
  }

  extend(key: any, value: any) {
    if (this.has(this.prefix + key)) {
      const _value = this.get(this.prefix + key);
      if (typeof jQuery != 'undefined') {
        $.extend(_value, JSON.parse(JSON.stringify(value)));
      }
      this.set(this.prefix + key, _value);
    } else {
      this.set(this.prefix + key, value);
    }
  }

  remove(key: string) {
    localStorage.removeItem(this.prefix + key);
  }
}