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

import { ErrorLoggerService } from '../core/error-logger.service';
import { Voucher } from '../core/voucher';
import { ExecuteResponse, ImportRequest, MappingUpdate, MappingEntry, PreviewResponse } from './sales-import';

const url = '/api/sales-import';

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

  voucher(id: Signal<string | null>) {
    return httpResource<Voucher>(() => {
      const id_ = id();
      return id_ === null ? undefined : `${url}/voucher/${id_}`;
    });
  }

  preview(request: ImportRequest): Observable<PreviewResponse> {
    return this.http
      .post<PreviewResponse>(`${url}/preview`, request)
      .pipe(catchError(this.log.handleError('SalesImportService', 'preview'))) as Observable<PreviewResponse>;
  }

  execute(request: ImportRequest): Observable<ExecuteResponse> {
    return this.http
      .post<ExecuteResponse>(`${url}/execute`, request)
      .pipe(catchError(this.log.handleError('SalesImportService', 'execute'))) as Observable<ExecuteResponse>;
  }

  saveMapping(mapping: MappingUpdate): Observable<MappingEntry[]> {
    return this.http
      .put<MappingEntry[]>(`${url}/mapping`, mapping)
      .pipe(catchError(this.log.handleError('SalesImportService', 'saveMapping'))) as Observable<MappingEntry[]>;
  }
}