import 'reflect-metadata'
import { singleton } from './singleton'

const noJsonMetadataKey = ('noJsonSet')

@singleton
export class NoJsonClass {
  private noJsonPropSet: Set<string> = new Set()

  public addKey(className: string, propertyKey: string) {
    this.noJsonPropSet.add(className+'_'+propertyKey)
  }

  public checkExist(className: string, propertyKey: string) {
    return this.noJsonPropSet.has(className+'_'+propertyKey)
  }
}
/**
 * 在不需要toJson方法输出的字段上加上 @noJson
 * @return {{(target: Function): void, (target: Object, propertyKey: (string | symbol)): void}}
 */
export function noJson() {
  // return Reflect.metadata(noJsonMetadataKey, !0)
  return function(target: Object, propertyKey: string) {
    console.log(target)
    new NoJsonClass().addKey(target.constructor.name, propertyKey)
  }
}

export function checkJson(target: any, propertyKey: string) {
  return !new NoJsonClass().checkExist(target.constructor.modelName, propertyKey)
}