import { Injectable, inject } from '@angular/core';
import { Observable, of, catchError, map, shareReplay } from 'rxjs';
import { ApiService } from './api.service';
import { ClientPreview, UserPreview } from '../models';

export interface ResolvedClient {
  clientId: string;
  clientName: string | null;
  userId: string;
  userName: string | null;
  agentModel: string;
  agentVersion: string;
}

@Injectable({
  providedIn: 'root'
})
export class ClientCacheService {
  private apiService = inject(ApiService);

  private cache = new Map<string, Observable<{client: ClientPreview, user: UserPreview} | null>>();

  resolveClient(clientId: string): Observable<{client: ClientPreview, user: UserPreview} | null> {
    if (!this.cache.has(clientId)) {
      const request$ = this.apiService.getClientPreview(clientId).pipe(
        map(response => ({
          client: response.client,
          user: response.user
        })),
        catchError(() => of(null)),
        shareReplay(1)
      );
      this.cache.set(clientId, request$);
    }
    return this.cache.get(clientId)!;
  }

  clearCache(): void {
    this.cache.clear();
  }
}