import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs/internal/Observable';
import { catchError } from 'rxjs/operators';

import { ErrorLoggerService } from '../core/error-logger.service';

import { Period } from './period';

const url = '/api/periods';
const serviceName = 'PeriodService';

@Injectable({ providedIn: 'root' })
export class PeriodService {
  constructor(
    private http: HttpClient,
    private log: ErrorLoggerService,
  ) {}

  get(id: string | null): Observable<Period> {
    const getUrl: string = id === null ? `${url}` : `${url}/${id}`;
    return this.http
      .get<Period>(getUrl)
      .pipe(catchError(this.log.handleError(serviceName, `get id=${id}`))) as Observable<Period>;
  }

  list(): Observable<Period[]> {
    return this.http
      .get<Period[]>(`${url}/list`)
      .pipe(catchError(this.log.handleError(serviceName, 'list'))) as Observable<Period[]>;
  }

  save(period: Period): Observable<Period> {
    return this.http
      .post<Period>(`${url}`, period)
      .pipe(catchError(this.log.handleError(serviceName, 'save'))) as Observable<Period>;
  }

  update(period: Period): Observable<Period> {
    return this.http
      .put<Period>(`${url}/${period.id}`, period)
      .pipe(catchError(this.log.handleError(serviceName, 'update'))) as Observable<Period>;
  }

  saveOrUpdate(period: Period): Observable<Period> {
    if (!period.id) {
      return this.save(period);
    }
    return this.update(period);
  }

  delete(id: string): Observable<Period> {
    return this.http
      .delete<Period>(`${url}/${id}`)
      .pipe(catchError(this.log.handleError(serviceName, 'delete'))) as Observable<Period>;
  }
}