import { useState } from "react";
import { useTranslation } from "react-i18next";
import { useParams, useSearchParams } from "react-router";

import {
	type BankOperation,
	bankPeriod,
	useBankCard,
	useBankCards,
	useBankOperations,
	useBankSummary,
	useUpdateBankCard,
} from "@/entities/bank-card";
import { ApiErrorCode, apiErrorCode, isApiErrorCode } from "@/shared/api";
import { formatDate, formatMoney } from "@/shared/lib";

const PAGE_SIZES = new Set(["5", "10", "20", "50", "100", "all"]);

type CardPageVm = ReturnType<typeof useCardPageVm>;

function useCardPageVm() {
	const { cardId } = useParams();
	const [parameters, setParameters] = useSearchParams();
	const { t } = useTranslation();
	const period = bankPeriod(parameters);
	const requestedSize = parameters.get("limit") ?? "10";
	const pageSize = PAGE_SIZES.has(requestedSize) ? requestedSize : "10";
	const rawPage = Number(parameters.get("page") ?? 1);

	const page
		= pageSize !== "all" && Number.isSafeInteger(rawPage) && rawPage > 0
			? rawPage
			: 1;

	const card = useBankCard(cardId);
	const updateCard = useUpdateBankCard();
	const cards = useBankCards(true);

	const history = useBankOperations(cardId, {
		...period,
		limit: pageSize === "all" ? "all" : Number(pageSize),
		page,
	});

	const summary = useBankSummary(period, cardId);
	const [editingCard, setEditingCard] = useState(false);

	const [operation, setOperation] = useState<"new"
		| BankOperation
		| null>(
		null,
	);

	const [deleting, setDeleting] = useState<BankOperation | null>(null);

	const rows = history.data?.items.map((item) => {
		const isOutgoing
			= item.kind === "expense"
				|| (item.kind === "transfer" && item.cardId === cardId);

		const otherCardId = isOutgoing ? item.targetCardId : item.cardId;
		let title = t(`bank.kinds.${item.kind}`);
		if (item.kind === "transfer")
			title = t(isOutgoing ? "bank.transferTo" : "bank.transferFrom", {
				name: isOutgoing ? item.targetCardName : item.cardName,
			});

		return {
			color: isOutgoing ? "red" : "green",
			editable:
				!history.isPlaceholderData
				&& !card.data?.archivedAt
				&& Boolean(cards.data)
				&& !cards.data?.some(
					c =>
						(c.id === item.cardId || c.id === item.targetCardId)
						&& c.archivedAt,
				),
			item,
			metadata: [formatDate(item.date), item.categoryName, item.description]
				.filter(Boolean)
				.join(" · "),
			onDelete: () => setDeleting(item),
			onEdit: () => setOperation(item),
			otherCard:
				item.kind === "transfer"
					? otherCardId
					: null,
			title,
			tone: isOutgoing ? ("negative" as const) : ("positive" as const),
			value: `${isOutgoing ? "−" : "+"}${formatMoney(item.amount)}`,
		};
	});

	return {
		archiveError: updateCard.isError ? updateCard.error : undefined,
		archivePending: updateCard.isPending,
		canAddOperation: !card.data?.archivedAt && Boolean(cards.data),
		card: card.data,
		cardError: card.error,
		cardLoading: card.isLoading,
		cardRefreshError: card.isError,
		cardRefreshing: card.isFetching,
		cardRetry: () => card.refetch(),
		cards: cards.data,
		cardsFeedback: cards.isError
			? { cached: Boolean(cards.data), error: cards.error }
			: undefined,
		cardsRetry: () => cards.refetch(),
		closeDeletion: () => setDeleting(null),
		closeEditing: () => setEditingCard(false),
		closeOperation: () => setOperation(null),
		deleting,
		editableOperation: operation === "new" ? undefined : (operation ?? undefined),
		editingCard,
		history: {
			changingPage: history.isPlaceholderData,
			error: history.error,
			loading: history.isLoading,
			page: history.data?.page,
			refetch: () => history.refetch(),
		},
		notFound: isApiErrorCode(
			apiErrorCode(card.error),
			ApiErrorCode.BankNotFound,
		),
		openCardEditor: () => setEditingCard(true),
		openNewOperation: () => setOperation("new"),
		operation,
		page,
		pageSize,
		period,
		rows,
		setPage: (value: number) =>
			setParameters({ ...period, limit: pageSize, page: String(value) }),
		setPageSize: (value: null | string) => {
			if (value && PAGE_SIZES.has(value))
				setParameters({ ...period, limit: value });
		},
		setPeriod: (value: [null | string, null | string]) => {
			if (value[0] && value[1])
				setParameters({ from: value[0], limit: pageSize, to: value[1] });
		},
		summary: {
			data: summary.data,
			error: summary.error,
			fetching: summary.isFetching,
			loading: summary.isLoading,
			refetch: () => summary.refetch(),
		},
		toggleArchive: () => {
			if (!card.data) return;

			updateCard.mutate({
				body: { archived: !card.data.archivedAt, version: card.data.version },
				id: card.data.id,
			});
		},
		totalPages:
			pageSize === "all"
				? 1
				: Math.max(1, Math.ceil((history.data?.total ?? 0) / Number(pageSize))),
	};
}

export { type CardPageVm, useCardPageVm };