/**
 * Vue多层继承生命周期处理装饰器
 *
 * @export
 * @param {*} [params]
 * @returns {*}
 */
export function VueLifeCycleProcessing(params?: any): any {
  /**
   * 装饰器处理
   */
  return function(constructor: any) {
    // 原型
    const p = constructor.prototype;
    // 方法名数组
    const methodNames: string[] = ['beforeCreate', 'beforeMount', 'mounted', 'beforeUpdate', 'updated', 'activated', 'deactivated', 'beforeDestroy', 'destroyed', 'errorCaptured'];
    methodNames.forEach((name: string) => {
      if (!p.hasOwnProperty(name) && p[name]) {
        p[name] = function() {
          if (this[name]) {
            this[name].apply(this, arguments);
          }
        };
      }
    });
    if (!p.hasOwnProperty('render') && p.render) {
      p.render = function(h: any) {
        if (this.render) {
          return this.render(h);
        }
      };
    }

    // 替换原生Watch注解
    if (p.___vueWatchArr && p.___vueWatchArr.length > 0) {
      const arr: any[] = JSON.parse(JSON.stringify(p.___vueWatchArr));
      delete p.___vueWatchArr;
      const fun = p.created;
      p.created = function() {
        arr.forEach((item: any) => {
          if (this.$watch && this[item.handler]) {
            this.$watch(item.key, this[item.handler], item.params);
          }
        });
        if (fun) {
          fun.apply(this, arguments);
        }
      };
    } else if (!p.hasOwnProperty('created') && p['created']) {
      p['created'] = function() {
        if (this['created']) {
          this['created'].apply(this, arguments);
        }
      };
    }
  };
}

/**
 * 替换Vue自身Watch注解，已实现在继承时的使用
 *
 * @export
 * @param {string} key 需要监控的值项名称
 * @param {{ deep?: boolean, immediate?: boolean }} [params]
 * @returns {*}
 */
export function Watch(key: string, params?: { deep?: boolean; immediate?: boolean }): any {
  return function(p: any, handler: string) {
    if (!p.___vueWatchArr) {
      p.___vueWatchArr = [];
    }
    p.___vueWatchArr.push({
      key,
      handler,
      params,
    });
  };
}