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

import { environment } from '../../environments/environment';
import { Tier } from '../interfaces/tier';

@Injectable({
  providedIn: 'root',
})
export class TierService {
  private http = inject(HttpClient);
  private baseUrl = `${environment.apiBaseUrl}/api/tiers`;

  /** Fetch all tiers ordered by display_order. */
  getTiers(): Observable<Tier[]> {
    return this.http.get<Tier[]>(this.baseUrl);
  }

  getTier(id: number): Observable<Tier> {
    return this.http.get<Tier>(`${this.baseUrl}/${id}`);
  }

  createTier(payload: Omit<Tier, 'id'>): Observable<Tier> {
    return this.http.post<Tier>(this.baseUrl, payload);
  }

  updateTier(id: number, payload: Partial<Tier>): Observable<Tier> {
    return this.http.put<Tier>(`${this.baseUrl}/${id}`, payload);
  }

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