import { Injectable, NotFoundException } from "@nestjs/common";

import { ConsignmentsRepository } from "./consignments.repository";
import { CreateConsignmentDto } from "./dto/create-consignment.dto";
import { FilterConsignmentDto } from "./dto/filter-consignment.dto";
import { Consignment } from "./entities/consignment.entity";

@Injectable()
export class ConsignmentsService {
  constructor(
    private readonly consignmentsRepository: ConsignmentsRepository,
  ) {}

  /** Create a new consignment for a freight booking. */
  create(dto: CreateConsignmentDto): Promise<Consignment> {
    return this.consignmentsRepository.create(dto);
  }

  /** Return a paginated list of consignments. */
  async findAll(
    filter: FilterConsignmentDto,
  ): Promise<{ items: Consignment[]; total: number }> {
    const page = filter.page ?? 1;
    const pageSize = filter.pageSize ?? 20;
    const [items, total] = await this.consignmentsRepository.findAndCount({
      where: {
        ...(filter.status ? { status: filter.status } : {}),
        ...(filter.bookingId ? { bookingId: filter.bookingId } : {}),
      },
      skip: (page - 1) * pageSize,
      take: pageSize,
      order: { createdAt: "DESC" },
    });
    return { items, total };
  }

  /** Get a single consignment by ID. */
  async findById(id: string): Promise<Consignment> {
    const consignment = await this.consignmentsRepository.findById(id);
    if (!consignment) {
      throw new NotFoundException(`Consignment ${id} not found`);
    }
    return consignment;
  }
}