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

import { BookingsRepository } from "./bookings.repository";
import { CreateBookingDto } from "./dto/create-booking.dto";
import { FilterBookingDto } from "./dto/filter-booking.dto";
import { Booking } from "./entities/booking.entity";

@Injectable()
export class BookingsService {
  constructor(private readonly bookingsRepository: BookingsRepository) {}

  /** Create a new freight booking. */
  async create(dto: CreateBookingDto): Promise<Booking> {
    return this.bookingsRepository.create({
      ...dto,
      scheduledDate: new Date(dto.scheduledDate),
    });
  }

  /** Return a paginated list of bookings matching the filter. */
  async findAll(
    filter: FilterBookingDto,
  ): Promise<{ items: Booking[]; total: number }> {
    const page = filter.page ?? 1;
    const pageSize = filter.pageSize ?? 20;
    const [items, total] = await this.bookingsRepository.findAndCount({
      where: {
        ...(filter.status ? { status: filter.status } : {}),
        ...(filter.customerId ? { customerId: filter.customerId } : {}),
      },
      skip: (page - 1) * pageSize,
      take: pageSize,
      order: { createdAt: "DESC" },
    });
    return { items, total };
  }

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

  /** Soft-delete a booking. */
  async remove(id: string): Promise<void> {
    await this.findById(id);
    await this.bookingsRepository.softDelete(id);
  }
}