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

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

const httpOptions = {
  headers: new HttpHeaders({ 'Content-Type': 'application/json' }),
};

const url = '/api/products';
const serviceName = 'ProductService';

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

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

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

  listOfSaleCategory(id: string): Observable<Product[]> {
    const options = { params: new HttpParams().set('sc', id) };
    return this.http
      .get<Product[]>(`${url}/query`, options)
      .pipe(catchError(this.log.handleError(serviceName, 'listOfSaleCategory'))) as Observable<Product[]>;
  }

  listIsActiveOfCategory(id: string): Observable<Product[]> {
    const options = { params: new HttpParams().set('mc', id) };
    return this.http
      .get<Product[]>(`${url}/query`, options)
      .pipe(catchError(this.log.handleError(serviceName, 'listIsActiveOfCategory'))) as Observable<Product[]>;
  }

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

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

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

  saveOrUpdate(product: Product): Observable<void> {
    if (!product.versionId) {
      return this.save(product);
    }
    return this.update(product);
  }

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

  balance(id: string, date: string): Observable<number> {
    const options = { params: new HttpParams().set('d', date) };
    return this.http
      .get<number>(`${url}/balance`, options)
      .pipe(catchError(this.log.handleError(serviceName, 'balance'))) as Observable<number>;
  }
}