import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Router } from '@angular/router';
import { Observable } from 'rxjs';
import { AuthResponse, LoginPayload, RegisterPayload } from '../interfaces/interface';

@Injectable({ providedIn: 'root' })
export class AuthService {
  private readonly baseUrl = 'http://localhost:3000';
  private readonly tokenKey = 'auth_token';

  constructor(private http: HttpClient, private router: Router) { }

  // -- API Calls --

  register(payload: RegisterPayload): Observable<AuthResponse> {
    return this.http.post<AuthResponse>(`${this.baseUrl}/auth/register`, payload);
  }

  login(payload: LoginPayload): Observable<AuthResponse> {
    return this.http.post<AuthResponse>(`${this.baseUrl}/auth/login`, payload);
  }

  // -- Token Management --

  storeToken(token: string): void {
    localStorage.setItem(this.tokenKey, token);
  }

  getToken(): string | null {
    return localStorage.getItem(this.tokenKey);
  }

  isLoggedIn(): boolean {
    return !!this.getToken();
  }

  logout(): void {
    localStorage.removeItem(this.tokenKey);
    this.router.navigate(['/login']);
  }

  getServerUrl(): Observable<string> {
    return this.http.get(`${this.baseUrl}/server`, {
      responseType: 'text'
    });
  }
}