import { HttpClient, HttpParams } 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 { ProductSku } from '../core/product-sku';

import { Recipe } from './recipe';

const url = '/api/recipes';
const serviceName = 'RecipeService';

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

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

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

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

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

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

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

  getIngredientDetails(
    id: string,
    startDate: string | null,
    finishDate: string | null,
  ): Observable<ProductSku> {
    const getUrl: string = `${url}/ingredient-details/${id}`;
    const options = {
      params: new HttpParams(),
    };
    if (startDate !== null) {
      options.params = options.params.set('s', startDate);
    }
    if (finishDate !== null) {
      options.params = options.params.set('f', finishDate);
    }
    return this.http
      .get<ProductSku>(getUrl, options)
      .pipe(
        catchError(this.log.handleError(serviceName, `get id=${id}`)),
      ) as Observable<ProductSku>;
  }
}