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,
	IRemoveAllFromOrderResponse,
	IRemoveFromOrderResponse,
	IRemoveKindFromOrderResponse,
} from '@types';

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

export function useOrderOverwrite() {
	const { t } = useI18n();
	const cartStore = useCartStore();
	const userStore = useUserStore();
	const { $appHelpers, $notify } = useNuxtApp();

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

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

	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.productUuid,
					});

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

						$notify({
							message: t('popup.success.addToCart', {
								product: args.productName,
							}),
							type: 'success',
						});
					}

					break;
				}

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

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

						$notify({
							message: t('popup.success.removeFromCart', {
								product: args.productName,
							}),
							type: 'success',
						});
					}

					break;
				}

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

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

						$notify({
							message: t('popup.success.removeFromCart', {
								product: args.productName,
							}),
							type: 'success',
						});
					}

					break;
				}

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

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

						$notify({
							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);
						$notify({
							message: t('popup.success.bulkRemoveOrder'),
							type: 'success',
						});
					}

					break;
				}

				default:
					console.error('No type provided for overwriteOrder');
			}
		} else {
			switch (args.type) {
				case 'add': {
					const current = Array.isArray(cookieCart.value) ? [...cookieCart.value] : [];

					const index = current.findIndex(
							(item) => item.product === args.productUuid
					);

					if (index !== -1) {
						current[index] = {
							...current[index],
							quantity: current[index].quantity + 1,
						};
					} else {
						current.push({
							product: args.productUuid,
							quantity: 1,
						});
					}

					cookieCart.value = current;

					$notify({
						message: t('popup.success.addToCart', {
							product: args.productName,
						}),
						type: 'success',
					});

					break;
				}

				case 'remove': {
					const current = Array.isArray(cookieCart.value)
							? [...cookieCart.value]
							: [];

					const index = current.findIndex(
							(item) => item.product === args.productUuid
					);

					if (index !== -1) {
						if (current[index].quantity > 1) {
							current[index] = {
								...current[index],
								quantity: current[index].quantity - 1,
							};
						} else {
							current.splice(index, 1);
						}

						cookieCart.value = current;

						$notify({
							message: t('popup.success.removeFromCart', {
								product: args.productName,
							}),
							type: 'success',
						});
					}

					break;
				}

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

					$notify({
						message: t('popup.success.removeFromCart', {
							product: args.productName,
						}),
						type: 'success',
					});

					break;
				}

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

					$notify({
						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);
						$notify({
							message: t('popup.success.bulkRemoveOrder'),
							type: 'success',
						});
					}

					break;
				}

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

	watch(
			[addError, removedError, removedKindError, removedAllError, bulkError],
			(errors) => {
				const err = errors.find(Boolean);
				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;
				}
				$notify({
					message,
					type: 'error',
					title: t('popup.errors.main'),
				});
			}
	);

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