import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
import { ApiError, apiDelete, apiGet, apiPost } from "../lib/api";

interface GlobalItem {
	id: number;
	brand: string;
	model: string;
	category: string | null;
	weightGrams: number | null;
	priceCents: number | null;
	imageUrl: string | null;
	description: string | null;
	sourceUrl: string | null;
	imageCredit: string | null;
	imageSourceUrl: string | null;
	createdAt: string;
}

interface GlobalItemWithOwnerCount extends GlobalItem {
	ownerCount: number;
}

interface ItemGlobalLink {
	id: number;
	itemId: number;
	globalItemId: number;
}

export function useGlobalItems(query?: string, tags?: string[]) {
	const params = new URLSearchParams();
	if (query) params.set("q", query);
	if (tags && tags.length > 0) params.set("tags", tags.join(","));
	const qs = params.toString();

	return useQuery({
		queryKey: ["global-items", query ?? "", tags ?? []],
		queryFn: () =>
			apiGet<GlobalItem[]>(`/api/global-items${qs ? `?${qs}` : ""}`),
	});
}

export function useGlobalItem(id: number | null) {
	return useQuery({
		queryKey: ["global-items", id],
		queryFn: () => apiGet<GlobalItemWithOwnerCount>(`/api/global-items/${id}`),
		enabled: id != null,
		retry: (count, error) =>
			error instanceof ApiError && error.status === 404 ? false : count < 3,
	});
}

export function useLinkItem() {
	const queryClient = useQueryClient();
	return useMutation({
		mutationFn: ({
			itemId,
			globalItemId,
		}: {
			itemId: number;
			globalItemId: number;
		}) =>
			apiPost<ItemGlobalLink>(`/api/items/${itemId}/link`, { globalItemId }),
		onSuccess: () => {
			queryClient.invalidateQueries({ queryKey: ["items"] });
			queryClient.invalidateQueries({ queryKey: ["global-items"] });
		},
	});
}

export function useUnlinkItem() {
	const queryClient = useQueryClient();
	return useMutation({
		mutationFn: (itemId: number) =>
			apiDelete<{ success: boolean }>(`/api/items/${itemId}/link`),
		onSuccess: () => {
			queryClient.invalidateQueries({ queryKey: ["items"] });
			queryClient.invalidateQueries({ queryKey: ["global-items"] });
		},
	});
}