/**
 * Use Case: RecordEngagementUseCase
 *
 * Records an engagement event when a visitor interacts with an entity.
 */

import type { AsyncUseCase } from '@gridpilot/shared/application';
import type { ILogger } from '@gridpilot/shared/logging/ILogger';
import { EngagementEvent, type EngagementAction, type EngagementEntityType } from '../../domain/entities/EngagementEvent';
import type { IEngagementRepository } from '../../domain/repositories/IEngagementRepository';

export interface RecordEngagementInput {
  action: EngagementAction;
  entityType: EngagementEntityType;
  entityId: string;
  actorId?: string;
  actorType: 'anonymous' | 'driver' | 'sponsor';
  sessionId: string;
  metadata?: Record<string, string | number | boolean>;
}

export interface RecordEngagementOutput {
  eventId: string;
  engagementWeight: number;
}

export class RecordEngagementUseCase
  implements AsyncUseCase<RecordEngagementInput, RecordEngagementOutput> {
  constructor(
    private readonly engagementRepository: IEngagementRepository,
    private readonly logger: ILogger,
  ) {}

  async execute(input: RecordEngagementInput): Promise<RecordEngagementOutput> {
    this.logger.debug('Executing RecordEngagementUseCase', { input });
    try {
      const eventId = `eng-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;

      const baseProps: Omit<Parameters<typeof EngagementEvent.create>[0], 'timestamp'> = {
        id: eventId,
        action: input.action,
        entityType: input.entityType,
        entityId: input.entityId,
        actorType: input.actorType,
        sessionId: input.sessionId,
      };

      const event = EngagementEvent.create({
        ...baseProps,
        ...(input.actorId !== undefined ? { actorId: input.actorId } : {}),
        ...(input.metadata !== undefined ? { metadata: input.metadata } : {}),
      });

      await this.engagementRepository.save(event);
      this.logger.info('Engagement recorded successfully', { eventId, input });

      return {
        eventId,
        engagementWeight: event.getEngagementWeight(),
      };
    } catch (error) {
      this.logger.error('Error recording engagement', error, { input });
      throw error;
    }
  }
}