package cart

import (
	"context"
	"time"

	"git.k6n.net/go-cart-actor/pkg/actor"
	"github.com/matst80/go-redis-inventory/pkg/inventory"
)

type CartMutationContext struct {
	reservationService inventory.CartReservationService
}

func NewCartMutationContext(reservationService inventory.CartReservationService) *CartMutationContext {
	return &CartMutationContext{
		reservationService: reservationService,
	}
}

func (c *CartMutationContext) ReserveItem(ctx context.Context, cartId CartId, sku string, locationId *string, quantity uint16) (*time.Time, error) {

	if quantity <= 0 || c.reservationService == nil {
		return nil, nil
	}

	l := inventory.LocationID("se")
	if locationId != nil {
		l = inventory.LocationID(*locationId)
	}
	ttl := time.Minute * 15
	endTime := time.Now().Add(ttl)
	err := c.reservationService.ReserveForCart(ctx, inventory.CartReserveRequest{
		CartID: inventory.CartID(cartId.String()),
		InventoryReference: &inventory.InventoryReference{
			SKU:        inventory.SKU(sku),
			LocationID: l,
		},
		TTL:      ttl,
		Quantity: uint32(quantity),
	})
	if err != nil {
		return nil, err
	}

	return &endTime, nil

}

func (c *CartMutationContext) UseReservations(item *CartItem) bool {
	if item.ReservationEndTime != nil {
		return true
	}
	return item.Cgm == "55010"
}

func (c *CartMutationContext) ReleaseItem(ctx context.Context, cartId CartId, sku string, locationId *string) error {
	if c.reservationService == nil {
		return nil
	}
	l := inventory.LocationID("se")
	if locationId != nil {
		l = inventory.LocationID(*locationId)
	}
	return c.reservationService.ReleaseForCart(ctx, inventory.SKU(sku), l, inventory.CartID(cartId.String()))
}

func NewCartMultationRegistry(context *CartMutationContext) actor.MutationRegistry {

	reg := actor.NewMutationRegistry()
	reg.RegisterMutations(
		actor.NewMutation(context.AddItem),
		actor.NewMutation(context.ChangeQuantity),
		actor.NewMutation(context.RemoveItem),
		actor.NewMutation(ClearCart),
		actor.NewMutation(AddVoucher),
		actor.NewMutation(RemoveVoucher),
		actor.NewMutation(UpsertSubscriptionDetails),
		actor.NewMutation(SetUserId),
		actor.NewMutation(LineItemMarking),
		actor.NewMutation(RemoveLineItemMarking),
		actor.NewMutation(SubscriptionAdded),
		//		actor.NewMutation(SubscriptionRemoved),
	)
	return reg

}