import { usePortal } from '@agent/hooks/usePortal';
import animationWorkflow from '@agent/workflows/theme/change-animation';
import vibesWorkflow from '@agent/workflows/theme/change-site-vibes';
import fontsWorkflow from '@agent/workflows/theme/change-theme-fonts-variation';
import variationWorkflow from '@agent/workflows/theme/change-theme-variation';
import { createPortal, useEffect, useRef, useState } from '@wordpress/element';
import { __ } from '@wordpress/i18n';
import { Icon, moreVertical } from '@wordpress/icons';
import { AnimatePresence, motion } from 'framer-motion';

export const OptionsPopover = () => {
	const popoutNode = usePortal('extendify-agent-border-frame-mount');
	const buttonRef = useRef(null);
	const firstButtonRef = useRef(null);
	const [topRight, setTopRight] = useState(null);

	const onOpen = () => {
		if (topRight) return setTopRight(null);
		const rect = buttonRef.current.getBoundingClientRect();
		setTopRight({
			top: rect.bottom + 4,
			right: window.innerWidth - rect.right,
		});
	};
	const onClose = () => {
		setTopRight(null);
		buttonRef.current?.focus();
	};

	useEffect(() => {
		if (!topRight || !firstButtonRef.current) return;
		firstButtonRef.current.focus();
	}, [topRight]);

	useEffect(() => {
		// click away
		const handle = (e) => {
			if (buttonRef.current.contains(e.target)) return;
			if (popoutNode?.contains(e.target)) return;
			setTopRight(null);
		};
		window.addEventListener('click', handle);
		return () => window.removeEventListener('click', handle);
	}, [popoutNode]);

	if (!popoutNode) return null;
	return (
		<>
			{createPortal(
				topRight ? (
					<AnimatePresence>
						<Popover
							position={topRight}
							onClose={onClose}
							firstItemRef={firstButtonRef}
						/>
					</AnimatePresence>
				) : null,
				popoutNode,
			)}
			<button
				ref={buttonRef}
				type="button"
				className="relative z-10 flex justify-center h-6 w-6 items-center border-0 bg-banner-main text-banner-text outline-hidden ring-design-main focus:shadow-none focus:outline-hidden focus-visible:outline-design-main focus:ring-2 hover:bg-gray-100 rounded-md"
				onClick={onOpen}
				aria-expanded={topRight ? 'true' : 'false'}
				aria-haspopup="true"
			>
				<Icon
					className="pointer-events-none fill-current leading-none"
					icon={moreVertical}
					size={18}
				/>
				<span className="sr-only">
					{__('View more options', 'extendify-local')}
				</span>
			</button>
		</>
	);
};

const buttons = [
	{ name: fontsWorkflow.example.text, available: fontsWorkflow.available },
	{
		name: variationWorkflow.example.text,
		available: variationWorkflow.available,
	},
	{ name: vibesWorkflow.example.text, available: vibesWorkflow.available },
	{
		name: animationWorkflow.example.text,
		available: animationWorkflow.available,
	},
];

const Popover = ({ position, onClose, firstItemRef }) => {
	useEffect(() => {
		const handle = (e) => {
			if (e.key === 'Escape') {
				e.preventDefault();
				onClose();
			}
		};
		window.addEventListener('keydown', handle);
		return () => window.removeEventListener('keydown', handle);
	}, [onClose]);

	return (
		<motion.div
			className="fixed max-w-50 rounded-md bg-white shadow-xl py-2 z-max flex flex-col items-start justify-center gap-1 focus:outline-none border border-gray-300"
			style={{ top: position.top, right: position.right }}
			initial={{ opacity: 0, scale: 0.95 }}
			animate={{ opacity: 1, scale: 1 }}
			exit={{ opacity: 0, scale: 0.95 }}
			transition={{ duration: 0.2 }}
			onKeyDown={(e) => {
				e.stopPropagation();
				e.preventDefault();
				if (e.key === 'Escape') return onClose();
				const curr = document.activeElement;
				if (e.key === 'ArrowDown' || (e.key === 'Tab' && !e.shiftKey)) {
					if (curr.nextSibling) {
						return curr.nextSibling.focus();
					}
					return firstItemRef.current.focus();
				}
				if (e.key === 'ArrowUp' || (e.key === 'Tab' && e.shiftKey)) {
					if (curr.previousSibling) {
						return curr.previousSibling.focus();
					}
					return curr.parentNode.lastChild.focus();
				}
				if (e.key === 'Enter') {
					return curr.click();
				}
			}}
		>
			{buttons
				.filter(({ available }) => available())
				.map(({ name }, i) => (
					<button
						key={name}
						type="button"
						className="w-full px-4 py-2 text-sm text-gray-900 text-left hover:bg-gray-100 focus:ring-2 focus:ring-design-main focus:outline-none"
						ref={i === 0 ? firstItemRef : null}
						role="menuitem"
						onClick={() => {
							window.dispatchEvent(
								new CustomEvent('extendify-agent:chat-submit', {
									detail: { message: name },
								}),
							);
							onClose();
						}}
					>
						{name}
					</button>
				))}
		</motion.div>
	);
};