// vim: set tw=80 ts=2 sw=2 sts=2 :

import * as moment from 'moment';

import { Injectable } from '@angular/core';
import { HttpClient, HttpParams } from '@angular/common/http';

import { Observable } from 'rxjs/Rx';

import { Operation } from './operation';

@Injectable()
export class OperationService {
  constructor(
    private http: HttpClient,
  ) {}

  formatDate(date: Date|string) {
    if(date instanceof Date) {
      return moment(date).format('YYYY-MM-DD');
    }

    return date;
  }

  private url(id?: Number): string {
    if(id) {
      return `/api/operation/${id}`;
    }

    return `/api/operation`;
  }

  query(
    accountId: number,
    minDate: Date|string = null,
    maxDate: Date|string = null
  ): Observable<Operation[]> {
    let params = new HttpParams();

    params = params.set('account_id', `${accountId}`);

    if(minDate) {
      params = params.set('begin', this.formatDate(minDate));
    }

    if(maxDate) {
      params = params.set('end', this.formatDate(maxDate));
    }

    return this.http.get<Operation[]>(this.url(), {
      params: params
    });
  }
  
  get(id: number): Observable<Operation> {
    return this.http.get<Operation>(this.url(id));
  }

  create(operation: Operation): Observable<Operation> {
    return this.http.post<Operation>(this.url(), operation);
  }

  update(operation: Operation): Observable<Operation> {
    return this.http.post<Operation>(this.url(operation.id), operation);
  }

  delete(operation: Operation): Observable<Operation> {
    return this.http.delete<Operation>(this.url(operation.id));
  }
}