import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { map, Observable } from 'rxjs';
import { environment } from '../../environments/environment';
import { User } from '../models/user.model';
import { ApiCollectionResponse } from '../models/api-response.model';
import { extractCollectionData } from '../utils/api-response.util';

@Injectable({
  providedIn: 'root'
})
export class UserService {
  private apiUrl = `${environment.apiBaseUrl}/users`;

  constructor(private http: HttpClient) {}

  createUser(user: User): Observable<User> {
    return this.http.post<User>(this.apiUrl, user);
  }

  getUserById(id: number): Observable<User> {
    return this.http.get<User>(`${this.apiUrl}/${id}`);
  }

  updateUser(id: number, user: User): Observable<User> {
    return this.http.put<User>(`${this.apiUrl}/${id}`, user);
  }

  deleteUser(id: number): Observable<void> {
    return this.http.delete<void>(`${this.apiUrl}/${id}`);
  }

  getAllUsers(): Observable<User[]> {
    return this.http
      .get<User[] | ApiCollectionResponse<User>>(this.apiUrl)
      .pipe(map(response => extractCollectionData(response)));
  }
}