import { useNotification } from '@composables/notification';
import {
	ADD_TO_CART,
	BULK_CART,
	REMOVE_ALL_FROM_CART,
	REMOVE_FROM_CART,
	REMOVE_KIND_FROM_CART,
} from '@graphql/mutations/cart';
import type {
	IAddToOrderResponse,
	IBulkOrderResponse,
	IProduct,
	IRemoveAllFromOrderResponse,
	IRemoveFromOrderResponse,
	IRemoveKindFromOrderResponse,
} from '@types';

interface IOverwriteOrderArguments {
	type: string;
	product: IProduct;
	bulkAction?: string;
	isBulkSync?: boolean;
	products?: {
		uuid: string;
	}[];
}

export function useOrderOverwrite() {
	const { t } = useI18n();
	const cartStore = useCartStore();
	const userStore = useUserStore();

	const isAuthenticated = computed(() => userStore.isAuthenticated);
	const orderUuid = computed(() => cartStore.currentOrder?.uuid);

	const cookieCart = useCookie($appHelpers.COOKIES_CART_KEY, {
		default: () => [],
		path: '/',
	});

	const {
		mutate: addMutate,
		loading: addLoading,
		error: addError,
	} = useMutation<IAddToOrderResponse>(ADD_TO_CART);
	const {
		mutate: removeMutate,
		loading: removeLoading,
		error: removedError,
	} = useMutation<IRemoveFromOrderResponse>(REMOVE_FROM_CART);
	const {
		mutate: removeKindMutate,
		loading: removeKindLoading,
		error: removedKindError,
	} = useMutation<IRemoveKindFromOrderResponse>(REMOVE_KIND_FROM_CART);
	const {
		mutate: removeAllMutate,
		loading: removeAllLoading,
		error: removedAllError,
	} = useMutation<IRemoveAllFromOrderResponse>(REMOVE_ALL_FROM_CART);
	const {
		mutate: bulkMutate,
		loading: bulkLoading,
		error: bulkError,
	} = useMutation<IBulkOrderResponse>(BULK_CART);

	async function overwriteOrder(args: IOverwriteOrderArguments) {
		if (isAuthenticated.value) {
			switch (args.type) {
				case 'add': {
					const addResult = await addMutate({
						orderUuid: orderUuid.value,
						productUuid: args.product.uuid,
					});

					if (addResult?.data?.addOrderProduct?.order) {
						cartStore.setCurrentOrders(addResult.data.addOrderProduct.order);

						useNotification({
							message: t('popup.success.addToCart', {
								product: args.product.name,
							}),
							type: 'success',
						});
					}

					break;
				}

				case 'remove': {
					const removeResult = await removeMutate({
						orderUuid: orderUuid.value,
						productUuid: args.product.uuid,
					});

					if (removeResult?.data?.removeOrderProduct?.order) {
						cartStore.setCurrentOrders(removeResult.data.removeOrderProduct.order);

						useNotification({
							message: t('popup.success.removeFromCart', {
								product: args.product.name,
							}),
							type: 'success',
						});
					}

					break;
				}

				case 'removeKind': {
					const removeKindResult = await removeKindMutate({
						orderUuid: orderUuid.value,
						productUuid: args.product.uuid,
					});

					if (removeKindResult?.data?.removeOrderProductsOfAKind?.order) {
						cartStore.setCurrentOrders(removeKindResult.data.removeOrderProductsOfAKind.order);

						useNotification({
							message: t('popup.success.removeFromCart', {
								product: args.product.name,
							}),
							type: 'success',
						});
					}

					break;
				}

				case 'removeAll': {
					const removeAllResult = await removeAllMutate({
						orderUuid: orderUuid.value,
					});

					if (removeAllResult?.data?.removeAllOrderProducts?.order) {
						cartStore.setCurrentOrders(removeAllResult.data.removeAllOrderProducts.order);

						useNotification({
							message: t('popup.success.removeAllFromCart'),
							type: 'success',
						});
					}

					break;
				}

				case 'bulk': {
					const bulkResult = await bulkMutate({
						orderUuid: orderUuid.value,
						action: args.bulkAction,
						products: args.products,
					});

					if (bulkResult?.data?.bulkOrderAction?.order) {
						cartStore.setCurrentOrders(bulkResult.data.bulkOrderAction.order);
						useNotification({
							message: t('popup.success.bulkRemoveOrder'),
							type: 'success',
						});
					}

					break;
				}

				default:
					console.error('No type provided for overwriteOrder');
			}
		} else {
			switch (args.type) {
				case 'add': {
					const currentCart = cookieCart.value || [];
					const existingItem = currentCart.find((item) => item.product.uuid === args.product.uuid);

					if (existingItem) {
						existingItem.quantity += 1;
						cookieCart.value = [
							...currentCart,
						];
					} else {
						cookieCart.value = [
							...currentCart,
							{
								product: args.product,
								quantity: 1,
							},
						];
					}

					useNotification({
						message: t('popup.success.addToCart', {
							product: args.product.name,
						}),
						type: 'success',
					});

					break;
				}

				case 'remove': {
					const currentCart = cookieCart.value || [];
					const existingItem = currentCart.find((item) => item.product.uuid === args.product.uuid);

					if (existingItem) {
						if (existingItem.quantity > 1) {
							existingItem.quantity -= 1;
							cookieCart.value = [
								...currentCart,
							];
						} else {
							cookieCart.value = currentCart.filter((item) => item.product.uuid !== args.product.uuid);
						}

						useNotification({
							message: t('popup.success.removeFromCart', {
								product: args.product.name,
							}),
							type: 'success',
						});
					}

					break;
				}

				case 'removeKind': {
					cookieCart.value = cookieCart.value.filter((item) => item.product.uuid !== args.product.uuid);

					useNotification({
						message: t('popup.success.removeFromCart', {
							product: args.product.name,
						}),
						type: 'success',
					});

					break;
				}

				case 'removeAll': {
					cookieCart.value = [];

					useNotification({
						message: t('popup.success.removeAllFromCart'),
						type: 'success',
					});

					break;
				}

				case 'bulk': {
					if (args.bulkAction === 'remove' && args.products) {
						const uuidsToRemove = args.products.map((p) => p.uuid);
						cookieCart.value = cookieCart.value.filter((item) => !uuidsToRemove.includes(item.product.uuid));

						useNotification({
							message: t('popup.success.bulkRemoveOrder'),
							type: 'success',
						});
					} else if (args.bulkAction === 'add' && args.products) {
						const currentCart = cookieCart.value || [];

						for (const productRef of args.products) {
							const existingItem = currentCart.find((item) => item.product.uuid === productRef.uuid);

							if (existingItem) {
								existingItem.quantity += 1;
							}
						}

						cookieCart.value = [
							...currentCart,
						];
					}

					break;
				}

				default:
					console.error('No type provided for overwriteOrder');
			}
		}
	}

	watch(addError || removedError || removedKindError || removedAllError || bulkError, (err) => {
		if (!err) return;
		console.error('useOrderOverwrite error:', err);
		let message = t('popup.errors.defaultError');
		if (isGraphQLError(err)) {
			message = err.graphQLErrors?.[0]?.message || message;
		} else {
			message = err.message;
		}
		useNotification({
			message,
			type: 'error',
			title: t('popup.errors.main'),
		});
	});

	return {
		addLoading,
		removeLoading,
		removeKindLoading,
		removeAllLoading,
		bulkLoading,
		overwriteOrder,
	};
}