import { Injectable } from "@nestjs/common";
import { InjectRepository } from "@nestjs/typeorm";
import { Repository } from "typeorm";

import { TrackingEvent } from "./entities/tracking-event.entity";

@Injectable()
export class TrackingService {
  constructor(
    @InjectRepository(TrackingEvent)
    private readonly trackingRepository: Repository<TrackingEvent>,
  ) {}

  /** Get the full timeline of tracking events for a consignment. */
  findByConsignment(consignmentId: string): Promise<TrackingEvent[]> {
    return this.trackingRepository.find({
      where: { consignmentId },
      order: { occurredAt: "ASC" },
    });
  }

  /** Record a new tracking event for a consignment. */
  record(event: Partial<TrackingEvent>): Promise<TrackingEvent> {
    const entity = this.trackingRepository.create(event);
    return this.trackingRepository.save(entity);
  }
}