import { AnalyticsApiClient } from '../../api/analytics/AnalyticsApiClient';
import { RecordPageViewOutputDTO, RecordEngagementOutputDTO } from '../../types/generated';
import { RecordPageViewInputViewModel } from '../../view-models/RecordPageViewInputViewModel';
import { RecordEngagementInputViewModel } from '../../view-models/RecordEngagementInputViewModel';

/**
 * Analytics Service
 *
 * Orchestrates analytics operations by coordinating API calls.
 * All dependencies are injected via constructor.
 */
export class AnalyticsService {
  constructor(
    private readonly apiClient: AnalyticsApiClient
  ) {}

  /**
   * Record a page view
   */
  async recordPageView(input: RecordPageViewInputViewModel): Promise<RecordPageViewOutputDTO> {
    const apiInput: { path: string; userId?: string } = {
      path: input.path,
    };
    if (input.userId) {
      apiInput.userId = input.userId;
    }
    return await this.apiClient.recordPageView(apiInput);
  }

  /**
   * Record an engagement event
   */
  async recordEngagement(input: RecordEngagementInputViewModel): Promise<RecordEngagementOutputDTO> {
    const apiInput: { eventType: string; userId?: string; metadata?: Record<string, unknown> } = {
      eventType: input.eventType,
    };
    if (input.userId) {
      apiInput.userId = input.userId;
    }
    if (input.metadata) {
      apiInput.metadata = input.metadata;
    }
    return await this.apiClient.recordEngagement(apiInput);
  }
}