// package serv_process -- процессинг сервиса
package serv_process

import (
	"fmt"
	"log"
	"strings"

	"adt/pkg/alias"
	"adt/pkg/entities/hotel_room_busy"
	"adt/pkg/types"
)

// ServProcess -- процессинг сервиса
type ServProcess struct {
	store types.IStore // Хранилище сервиса
}

// NewServProcess -- возвращает новый объект процессинга сервиса
func NewServProcess(store types.IStore) (*ServProcess, error) {
	log.Println("NewServProcess()")
	if store == nil {
		log.Fatalln("NewServProcess(): IStore==nil")
	}
	sf := &ServProcess{
		store: store,
	}
	return sf, nil
}

// MakeOrder -- создаёт новый заказ бронирования
func (sf *ServProcess) MakeHotelRoomOrder(order types.IHotelRoomOrder) error {
	if order == nil {
		return fmt.Errorf("ServProcess.MakeHotelRoomOrder(): IHotelRoomOrder==nil")
	}
	log.Printf("ServProcess.MakeHotelRoomOrder(): order=%v\n", order.Id())
	lstOrderDay := order.ListDay()                           // Дни для бронирования
	lstRoomBusy := make(map[alias.Date]types.IHotelRoomBusy) // Занятые дни
	for _, day := range lstOrderDay {
		busyId := alias.BusyId(fmt.Sprintf("%v.%v.%v", order.Hotel(), order.Room(), day))
		roomBusy, err := sf.store.GetHotelRoomBusy(busyId)
		if err != nil {
			if !strings.Contains(err.Error(), "not found") {
				return fmt.Errorf("ServProcess.MakeHotelRoomOrder(): in store.GetHotelRoomBusy, err=\n\t%w", err)
			}
			roomBusy, err = hotel_room_busy.NewHotelRoomBusy(order.Hotel(), order.Room(), day, false)
			if err != nil {
				return fmt.Errorf("ServProcess.MakeHotelRoomOrder(): in create IHotelRoomBusy, err=\n\t%w", err)
			}
		}
		lstRoomBusy[day] = roomBusy
	}

	for _, roomBusy := range lstRoomBusy {
		if roomBusy.IsBusy() {
			delete(lstRoomBusy, roomBusy.Date())
			continue
		}
		roomBusy.SetBusy()
		if err := sf.store.SetHotelRoomBusy(roomBusy); err != nil {
			return fmt.Errorf("ServProcess.MakeHotelRoomOrder(): order=%q, in store.SetHotelRoomBusy, err=\n\t%w", order.Id(), err)
		}
	}

	if len(lstRoomBusy) == 0 {
		return fmt.Errorf("ServProcess.MakeHotelRoomOrder(): order=%q, hotel room is busy for selected dates: %v..%v", order.Id(), order.From(), order.To())
	}

	if err := sf.store.SetOrder(order); err != nil {
		return fmt.Errorf("ServProcess.MakeHotelRoomOrder(): order=%q, in save.SetOrder, err=\n\t%w", order.Id(), err)
	}
	log.Printf("ServProcess.MakeHotelRoomOrder(): order=\n\t%#+v\n", order)
	return nil
}