import type { FlightSchedule } from "@/database/entities/flight-schedule.entity";
import type { PackageDetail } from "@/database/entities/package-detail.entity";
import type { PackageItineraryDay } from "@/database/entities/package-itinerary-day.entity";
import type {
	PackageItineraryWidget,
	PackageItineraryWidgetHotel,
	PackageItineraryWidgetInformation,
	PackageItineraryWidgetTransport,
} from "@/database/entities/package-itinerary-widget.entity";
import type { PackageItinerary } from "@/database/entities/package-itinerary.entity";
import type { Package } from "@/database/entities/package.entity";
import { PackageItineraryWidgetType } from "@/database/enums/package-itinerary-widget-type.enum";
import type { FlightMapper } from "@/modules/flight/flight.mapper";
import type { FlightClassResponse } from "@/modules/flight/flight.types";
import type { HotelMapper } from "@/modules/hotel/hotel.mapper";
import type {
	PackageDetailResponse,
	PackageItineraryDayResponse,
	PackageItineraryResponse,
	PackageItineraryWidgetResponse,
	PackageResponse,
} from "@/modules/package/package.types";
import type { PartnerMapper } from "@/modules/partner/partner.mapper";
import type { TransportationMapper } from "@/modules/transportation/transportation.mapper";
import * as dateFns from "date-fns";

export class PackageMapper {
	public constructor(
		private readonly partnerMapper: PartnerMapper,
		private readonly flightMapper: FlightMapper,
		private readonly hotelMapper: HotelMapper,
		private readonly transportationMapper: TransportationMapper,
	) {}

	public mapEntityToResponse(package_: Package): PackageResponse {
		return {
			id: package_.id,
			slug: package_.slug,
			name: package_.name,
			type: package_.type,
			class: package_.class,
			thumbnail: package_.thumbnail,
			use_fast_train: package_.useFastTrain,
			partner: this.partnerMapper.mapEntityToResponse(package_.partner),
			created_at: package_.createdAt,
			updated_at: package_.updatedAt,
		};
	}

	private mapFlightSchedule(
		flightSchedule: FlightSchedule,
	): FlightClassResponse[] {
		const flightClassResponses: FlightClassResponse[] = [];

		let currentFlightSchedule: FlightSchedule | null = flightSchedule;
		while (currentFlightSchedule !== null) {
			flightClassResponses.push(
				this.flightMapper.mapClassEntityToResponse(
					currentFlightSchedule.flight,
				),
			);
			currentFlightSchedule = currentFlightSchedule.next;
		}

		return flightClassResponses;
	}

	private mapItineraryWidget(
		packageItineraryWidget: PackageItineraryWidget,
	): PackageItineraryWidgetResponse {
		switch (packageItineraryWidget.type) {
			case PackageItineraryWidgetType.transport:
				const transportWidget =
					packageItineraryWidget as PackageItineraryWidgetTransport;

				return {
					type: "transport",
					transportation: transportWidget.transportation,
					from: transportWidget.from,
					to: transportWidget.to,
				};
			case PackageItineraryWidgetType.hotel:
				const hotelWidget =
					packageItineraryWidget as PackageItineraryWidgetHotel;

				return {
					type: "hotel",
					hotel: this.hotelMapper.mapEntityToResponse(hotelWidget.hotel),
				};
			case PackageItineraryWidgetType.information:
				const informationWidget =
					packageItineraryWidget as PackageItineraryWidgetInformation;

				return {
					type: "information",
					description: informationWidget.description,
				};
		}
	}

	private mapItineraryDay(
		packageItineraryDay: PackageItineraryDay,
		nth: number,
	): PackageItineraryDayResponse {
		return {
			nth,
			title: packageItineraryDay.title,
			description: packageItineraryDay.description,
			widgets: packageItineraryDay.widgets
				.getItems()
				.map((widget) => this.mapItineraryWidget(widget)),
		};
	}

	private mapItinerary(
		packageItinerary: PackageItinerary,
		nthDay: number = 1,
	): PackageItineraryResponse {
		const days: PackageItineraryDayResponse[] = [];
		for (
			let currentItineraryDay: PackageItineraryDay | null =
					packageItinerary.day,
				index = 0;
			currentItineraryDay !== null;
			currentItineraryDay = currentItineraryDay.next, index++
		) {
			days.push(this.mapItineraryDay(currentItineraryDay, nthDay + index));
		}

		return {
			location: packageItinerary.location,
			images: packageItinerary.images
				.getItems()
				.map((packageItineraryImage) => packageItineraryImage.src),
			days,
		};
	}

	public mapDetailEntityToResponse(
		packageDetail: PackageDetail,
	): PackageDetailResponse {
		const itineraries: PackageItineraryResponse[] = [];
		for (
			let currentItinerary: PackageItinerary | null = packageDetail.itinerary,
				nthDay = 1;
			currentItinerary !== null;
			currentItinerary = currentItinerary.next
		) {
			const itineraryResponse = this.mapItinerary(currentItinerary, nthDay);
			itineraries.push(itineraryResponse);
			nthDay += itineraryResponse.days.length;
		}

		return {
			id: packageDetail.id,
			package: this.mapEntityToResponse(packageDetail.package),
			departure_date: dateFns.format(packageDetail.departureDate, "yyyy-MM-dd"),
			tour_flights: packageDetail.tourFlight
				? this.mapFlightSchedule(packageDetail.tourFlight)
				: null,
			outbound_flights: this.mapFlightSchedule(packageDetail.outboundFlight),
			inbound_flights: this.mapFlightSchedule(packageDetail.inboundFlight),
			tour_hotels: packageDetail.tourHotels.map(
				this.hotelMapper.mapEntityToResponse,
			),
			makkah_hotel: this.hotelMapper.mapEntityToResponse(
				packageDetail.makkahHotel,
			),
			madinah_hotel: this.hotelMapper.mapEntityToResponse(
				packageDetail.madinahHotel,
			),
			transportation: this.transportationMapper.mapClassEntityToResponse(
				packageDetail.transportation,
			),
			quad_price: packageDetail.quadPrice,
			triple_price: packageDetail.triplePrice,
			double_price: packageDetail.doublePrice,
			infant_price: packageDetail.infantPrice,
			itineraries,
			created_at: packageDetail.createdAt,
			updated_at: packageDetail.updatedAt,
		};
	}
}