import { useNotification } from '@composables/notification';
import {
	ADD_TO_WISHLIST,
	BULK_WISHLIST,
	REMOVE_ALL_FROM_WISHLIST,
	REMOVE_FROM_WISHLIST,
} from '@graphql/mutations/wishlist';
import type {
	IAddToWishlistResponse,
	IBulkWishlistResponse, IProduct,
	IRemoveAllFromWishlistResponse,
	IRemoveFromWishlistResponse,
} from '@types';

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

export function useWishlistOverwrite() {
	const { t } = useI18n();
	const wishlistStore = useWishlistStore();
	const userStore = useUserStore();
	const { $appHelpers } = useNuxtApp();

	const isAuthenticated = computed(() => userStore.isAuthenticated);
	const wishlistUuid = computed(() => wishlistStore.wishlist?.uuid);

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

	const {
		mutate: addMutate,
		loading: addLoading,
		error: addError,
	} = useMutation<IAddToWishlistResponse>(ADD_TO_WISHLIST);
	const {
		mutate: removeMutate,
		loading: removeLoading,
		error: removedError,
	} = useMutation<IRemoveFromWishlistResponse>(REMOVE_FROM_WISHLIST);
	const {
		mutate: removeAllMutate,
		loading: removeAllLoading,
		error: removeAllError,
	} = useMutation<IRemoveAllFromWishlistResponse>(REMOVE_ALL_FROM_WISHLIST);
	const {
		mutate: bulkMutate,
		loading: bulkLoading,
		error: bulkError,
	} = useMutation<IBulkWishlistResponse>(BULK_WISHLIST);

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

					if (addResult?.data?.addWishlistProduct?.wishlist) {
						wishlistStore.setWishlist(addResult.data.addWishlistProduct.wishlist);

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

					break;
				}

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

					if (removeResult?.data?.removeWishlistProduct?.wishlist) {
						wishlistStore.setWishlist(removeResult.data.removeWishlistProduct.wishlist);

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

					break;
				}

				case 'removeAll': {
					const removeAllResult = await removeAllMutate({
						wishlistUuid: wishlistUuid.value,
						productUuid: args.product.uuid,
					});

					if (removeAllResult?.data?.removeAllWishlistProducts?.wishlist) {
						wishlistStore.setWishlist(removeAllResult.data.removeAllWishlistProducts.wishlist);

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

					break;
				}

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

					if (bulkResult?.data?.bulkWishlistAction?.wishlist) {
						wishlistStore.setWishlist(bulkResult.data.bulkWishlistAction.wishlist);

						if (args.isBulkSync) {
							cookieWishlist.value = [];
						} else {
							useNotification({
								message: t('popup.success.bulkRemoveWishlist'),
								type: 'success',
							});
						}
					}

					break;
				}

				default:
					console.error('No type provided for overwriteWishlist');
			}
		} else {
			switch (args.type) {
				case 'add': {
					const isAlreadyInWishlist = cookieWishlist.value.some(
							(item) => item.uuid === args.product.uuid
					);

					if (isAlreadyInWishlist) {
						useNotification({
							message: t('popup.errors.alreadyInWishlist', {
								product: args.product.name,
							}),
							type: 'warning',
						});
					} else {
						cookieWishlist.value = [...cookieWishlist.value, args.product];

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

					break;
				}

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

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

					break;
				}

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

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

					break;
				}

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

					if (bulkResult?.data?.bulkWishlistAction?.wishlist) {
						wishlistStore.setWishlist(bulkResult.data.bulkWishlistAction.wishlist);

						if (args.isBulkSync) {
							cookieWishlist.value = [];
						} else {
							useNotification({
								message: t('popup.success.bulkRemoveWishlist'),
								type: 'success',
							});
						}
					}

					break;
				}

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

	watch(addError || removedError || removeAllError || bulkError, (err) => {
		if (!err) return;
		console.error('useWishlistOverwrite 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,
		removeAllLoading,
		bulkLoading,
		overwriteWishlist,
	};
}