import { v4 } from 'uuid';
import { Session } from './session/session';
import { get } from 'lodash';


export declare type ExtraProperties<T> = {
  [P in keyof T]?: any;
}
/**
 * Entidade do sistema com metadados.
 */
export class Entity<T> {

  public _id: string;
  public _created_at: string;
  public _updated_at: string;
  public _id_cliente: string;
  public _id_empresa: string;
  public _sync: boolean;
  public _sync_local: boolean;
  public _last_sync: string;
  public _first_sync: string;
  public _deleted: boolean;
  public extra_properties?: {[property: string]: ExtraProperties<T>};
  public additional_properties?: {[property: string]: ExtraProperties<T>};

  constructor(json?: any, generateId?: boolean, overwriteFromExtraProperties?: boolean) {
    json = json || {};
    const gerarId = json.generateId !== false && generateId !== false;
    delete json.generateId;
    this._id = json._id || ( gerarId ? v4() : undefined );
    this._created_at = json._created_at || new Date().toISOString();
    this._updated_at = json._updated_at || new Date().toISOString();
    this._id_cliente = json._id_cliente;
    this._id_empresa = json._id_empresa;
    this._last_sync = json._last_sync;
    this._first_sync = json._first_sync;
    this._sync = json._sync || false;
    this._sync_local = true;
    this._deleted = json._deleted;
    this.extra_properties = json.extra_properties;
    if (this.extra_properties && overwriteFromExtraProperties)
      Object.keys(this.extra_properties)
        .map(key => this[key] = json.extra_properties[key]);
    this.additional_properties = json.additional_properties
    if (this.additional_properties)
      Object.keys(json.additional_properties)
        .map(key => this[key] = json.additional_properties[key]);
  }

  public getId() {
    return this._id;
  }

  public update() {
    this._updated_at = new Date().toISOString();
    this._sync = false;
    this._sync_local = false;
    return this;
  }

  public sign(session: Session) {
    this._id_cliente = get(session, 'apisession.cliente._id');
    this._id_empresa = get(session, 'apisession.empresa._id');
    return this;
  }

  toJson(): any {
    return Object.assign({}, this, { _sync_local: undefined });
  }
}