import { Check } from "lucide-react";
import {
	type ReactElement,
	useCallback,
	useEffect,
	useRef,
	useState,
} from "react";
import { cn } from "../../lib/utils";
import { Button } from "./button";

interface ConfirmButtonProps {
	readonly onConfirm: () => void;
	readonly icon: ReactElement;
	readonly label: string;
	readonly size?: "icon" | "icon-sm";
	readonly className?: string;
	readonly disabled?: boolean;
}

const REVERT_TIMEOUT_MS = 5_000;

export function ConfirmButton({
	onConfirm,
	icon,
	label,
	size = "icon",
	className,
	disabled,
}: ConfirmButtonProps) {
	const [isConfirming, setIsConfirming] = useState(false);
	const timerRef = useRef<ReturnType<typeof setTimeout>>(undefined);
	const wrapperRef = useRef<HTMLDivElement>(null);

	const revert = useCallback(() => {
		setIsConfirming(false);
		clearTimeout(timerRef.current);
	}, []);

	// Cleanup timer on unmount
	useEffect(() => {
		return () => clearTimeout(timerRef.current);
	}, []);

	// Click-outside listener when confirming
	useEffect(() => {
		if (!isConfirming) return;

		function handleMouseDown(e: MouseEvent) {
			if (
				wrapperRef.current &&
				!wrapperRef.current.contains(e.target as Node)
			) {
				revert();
			}
		}

		function handleEscapeKey(e: KeyboardEvent) {
			if (e.key === "Escape") {
				revert();
			}
		}

		document.addEventListener("mousedown", handleMouseDown);
		document.addEventListener("keydown", handleEscapeKey);
		return () => {
			document.removeEventListener("mousedown", handleMouseDown);
			document.removeEventListener("keydown", handleEscapeKey);
		};
	}, [isConfirming, revert]);

	const handleKeyDown = useCallback((e: React.KeyboardEvent) => {
		if (e.key === "Enter" || e.key === " ") {
			e.stopPropagation();
		}
	}, []);

	const handleClick = useCallback(
		(e: React.MouseEvent) => {
			e.stopPropagation();
			if (disabled) return;

			if (isConfirming) {
				revert();
				onConfirm();
			} else {
				setIsConfirming(true);
				clearTimeout(timerRef.current);
				timerRef.current = setTimeout(revert, REVERT_TIMEOUT_MS);
			}
		},
		[isConfirming, disabled, onConfirm, revert],
	);

	return (
		<div ref={wrapperRef} className="inline-flex">
			<Button
				variant="ghost"
				size={size}
				className={cn(
					className,
					isConfirming
						? "animate-confirm-pulse rounded-md bg-destructive text-primary-foreground hover:bg-destructive hover:text-primary-foreground"
						: "hover:text-hover-destructive",
				)}
				onClick={handleClick}
				onKeyDown={handleKeyDown}
				onBlur={revert}
				disabled={disabled}
				aria-label={isConfirming ? `Confirm ${label.toLowerCase()}` : label}
				title={isConfirming ? `Confirm ${label.toLowerCase()}` : label}
			>
				{isConfirming ? <Check size={16} /> : null}
				{!isConfirming && icon}
			</Button>
		</div>
	);
}