import { useEffect, useState } from "react";
import { toast } from "sonner";
import { useCategories } from "../hooks/useCategories";
import { useCurrency } from "../hooks/useCurrency";
import { useCreateItem } from "../hooks/useItems";
import { useUIStore } from "../stores/uiStore";
import { CategoryPicker } from "./CategoryPicker";

export function AddToCollectionModal() {
	const { open, globalItemId, globalItemName } = useUIStore(
		(s) => s.addToCollectionModal,
	);
	const closeAddToCollection = useUIStore((s) => s.closeAddToCollection);

	const { data: categories } = useCategories();
	const { currency } = useCurrency();
	const createItem = useCreateItem();

	const [categoryId, setCategoryId] = useState<number | null>(null);
	const [notes, setNotes] = useState("");
	const [purchasePrice, setPurchasePrice] = useState("");
	const [error, setError] = useState<string | null>(null);

	// Pre-select first category when categories load
	useEffect(() => {
		if (categories && categories.length > 0 && categoryId === null) {
			setCategoryId(categories[0].id);
		}
	}, [categories, categoryId]);

	// Reset form state when modal closes
	useEffect(() => {
		if (!open) {
			setCategoryId(categories?.[0]?.id ?? null);
			setNotes("");
			setPurchasePrice("");
			setError(null);
		}
	}, [open, categories]);

	if (!open || !globalItemId) return null;

	function handleClose() {
		closeAddToCollection();
	}

	function handleSubmit(e: React.FormEvent) {
		e.preventDefault();
		if (categoryId === null) {
			setError("Please select a category");
			return;
		}
		setError(null);

		const purchasePriceCents = purchasePrice
			? Math.round(Number.parseFloat(purchasePrice) * 100)
			: undefined;

		createItem.mutate(
			{
				name: globalItemName ?? "Unknown Item",
				categoryId,
				globalItemId: globalItemId!,
				notes: notes || undefined,
				purchasePriceCents: purchasePriceCents || undefined,
			},
			{
				onSuccess: () => {
					toast.success("Added to Collection");
					closeAddToCollection();
				},
				onError: (err) => {
					setError(err instanceof Error ? err.message : "Failed to add item");
				},
			},
		);
	}

	return (
		<div
			role="dialog"
			className="fixed inset-0 z-50 flex items-center justify-center bg-black/50"
			onClick={handleClose}
			onKeyDown={(e) => {
				if (e.key === "Escape") handleClose();
			}}
		>
			<div
				role="document"
				className="w-full max-w-md bg-white rounded-xl shadow-xl p-6"
				onClick={(e) => e.stopPropagation()}
				onKeyDown={() => {}}
			>
				<h2 className="text-lg font-semibold text-gray-900 mb-1">
					Add to Collection
				</h2>
				<p className="text-sm text-gray-500 mb-4">{globalItemName}</p>

				<form onSubmit={handleSubmit} className="space-y-4">
					<div>
						<label className="block text-sm font-medium text-gray-700 mb-1">
							Category
						</label>
						<CategoryPicker
							value={categoryId ?? 0}
							onChange={(id) => setCategoryId(id)}
						/>
					</div>

					<div>
						<label
							htmlFor="collection-notes"
							className="block text-sm font-medium text-gray-700 mb-1"
						>
							Notes
						</label>
						<textarea
							id="collection-notes"
							value={notes}
							onChange={(e) => setNotes(e.target.value)}
							placeholder="Personal notes (optional)"
							rows={3}
							className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent resize-none"
						/>
					</div>

					<div>
						<label
							htmlFor="collection-price"
							className="block text-sm font-medium text-gray-700 mb-1"
						>
							Purchase Price ({currency})
						</label>
						<input
							id="collection-price"
							type="number"
							value={purchasePrice}
							onChange={(e) => setPurchasePrice(e.target.value)}
							placeholder="Purchase price (optional)"
							min="0"
							step="0.01"
							className="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent"
						/>
					</div>

					{error && <p className="text-sm text-red-600">{error}</p>}

					<div className="flex justify-end gap-2 pt-2">
						<button
							type="button"
							onClick={handleClose}
							className="px-4 py-2 text-sm font-medium text-gray-700 bg-gray-100 hover:bg-gray-200 rounded-lg transition-colors"
						>
							Cancel
						</button>
						<button
							type="submit"
							disabled={createItem.isPending}
							className="px-4 py-2 text-sm font-medium text-white bg-gray-700 hover:bg-gray-800 disabled:opacity-50 rounded-lg transition-colors"
						>
							{createItem.isPending ? "Adding..." : "Add to Collection"}
						</button>
					</div>
				</form>
			</div>
		</div>
	);
}