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

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

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

@Injectable({
  providedIn: 'root',
})
export class PrinterService {
  private http = inject(HttpClient);
  private log = inject(ErrorLoggerService);

  get(id: Signal<string | null>): HttpResourceRef<Printer | undefined> {
    return httpResource<Printer>(() => {
      const idVal = id();
      return idVal === null || idVal === undefined ? url : `${url}/${idVal}`;
    });
  }

  list(): HttpResourceRef<Printer[] | undefined> {
    return httpResource<Printer[]>(() => `${url}/list`);
  }

  save(printer: Printer): Observable<Printer> {
    return this.http
      .post<Printer>(url, printer, httpOptions)
      .pipe(catchError(this.log.handleError(serviceName, 'save'))) as Observable<Printer>;
  }

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

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

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