import {Injectable} from '@angular/core';
import {Prize, PrizeSet, PrizeSetForm} from '../model/prize-entities';
import {Observable} from 'rxjs';
import {HttpClient, HttpParams} from '@angular/common/http';

@Injectable({
  providedIn: 'root'
})
export class PrizeService {
  private PRIZE_PREFIX = '/api/prizes/prize';
  private SET_PREFIX = '/api/prizes/set';

  constructor(private http: HttpClient) {
  }

  getAll(locked ?: boolean): Observable<Prize[]> {
    if (locked !== undefined) {
      const params = new HttpParams().set('locked', String(locked));
      return this.http.get<Prize[]>(this.PRIZE_PREFIX, {params});
    } else {
      return this.http.get<Prize[]>(this.PRIZE_PREFIX);
    }
  }

  addPrize(prize: Prize): Observable<void> {
    var formData = new FormData();
    formData.append('image', prize.image);

    const backEndPrize = Object.assign({}, prize);
    backEndPrize.image = null;
    const blob = new Blob([JSON.stringify(backEndPrize)], {type: 'application/json'});
    formData.append('form', blob);

    return this.http.post<void>(this.PRIZE_PREFIX, formData);
  }

  updatePrize(prize: Prize, prizeId: number): Observable<void> {
    var formData = new FormData();
    formData.append('image', prize.image);

    const backEndPrize = Object.assign({}, prize);
    backEndPrize.image = null;
    const blob = new Blob([JSON.stringify(backEndPrize)], {type: 'application/json'});
    formData.append('form', blob);

    const url = `${this.PRIZE_PREFIX}/${prizeId}`;
    return this.http.put<void>(url, formData);
  }

  deletePrize(prizeId: number): Observable<void> {
    const url = `${this.PRIZE_PREFIX}/${prizeId}`;
    return this.http.delete<void>(url);
  }

  lockPrize(prizeId: number): Observable<void> {
    const url = `${this.PRIZE_PREFIX}/${prizeId}/lock`;
    return this.http.put<void>(url, null);
  }

  unlockPrize(prizeId: number): Observable<void> {
    const url = `${this.PRIZE_PREFIX}/${prizeId}/unlock`;
    return this.http.put<void>(url, null);
  }

  getPrize(prizeId: number): Observable<Prize> {
    const url = `${this.PRIZE_PREFIX}/${prizeId}`;
    return this.http.get<Prize>(url);
  }

  getPrizeSet(prizeSetId: number): Observable<PrizeSet> {
    const url = `${this.SET_PREFIX}/${prizeSetId}`;
    return this.http.get<PrizeSet>(url);
  }

  addPrizeSet(prizeSet: PrizeSetForm): Observable<void> {
    const newSet: PrizeSetForm = Object.assign({}, prizeSet);
    return this.http.post<void>(this.SET_PREFIX, newSet);
  }

  updatePrizeSet(prizeSet: PrizeSetForm, prizeSetId: number): Observable<void> {
    const url = `${this.SET_PREFIX}/${prizeSetId}`;
    const newSet: PrizeSetForm = Object.assign({}, prizeSet);
    return this.http.put<void>(url, newSet);
  }

  getAllSets(): Observable<PrizeSet[]> {
    return this.http.get<PrizeSet[]>(this.SET_PREFIX);
  }

  deleteSet(setId: number): Observable<void> {
    const url = `${this.SET_PREFIX}/${setId}`;
    return this.http.delete<void>(url);
  }
}