import React, { useState, useEffect, useRef, useLayoutEffect } from "react";
import { css, cx } from "@emotion/css";
import useLocation from "wouter/use-location";

import { ReactComponent as Logo } from "../assets/logo.svg";
import { ReactComponent as Right } from "../assets/arrow-right.svg";
import { getTimeout } from "../util";
import Menu from "./Menu";
import useMediaQuery from "../util/useMediaQuery";

const [timer, clear] = getTimeout();

const Container: React.FC<{
	children: (
		| string
		| React.DetailedReactHTMLElement<any, HTMLElement>
		| React.ReactElement
	)[];
	hideNav?: boolean;
	end?: boolean;
	next?: string;
	className?: string;
}> = ({
	children: _children,
	hideNav = false,
	end = false,
	next,
	className,
	...props
}) => {
	const [, navigate] = useLocation();

	const mobile = useMediaQuery("(max-width: 50rem)");

	const logoContainer = useRef<HTMLButtonElement>(null);
	const highlightCircle = useRef<HTMLSpanElement>(null);
	const containerChild = useRef<HTMLDivElement>(null);
	const nextBtn = useRef<HTMLButtonElement>(null);

	const [showMenu, setShowMenu] = useState(false);

	const children = React.Children.map(
		_children,
		(
			child:
				| string
				| React.DetailedReactHTMLElement<any, HTMLElement>
				| React.ReactElement,
		) =>
			!child || typeof child === "string"
				? child
				: React.cloneElement(child, {
						style: {
							opacity: 0,
							transform: "translateY(3rem)",
							transition: "all 300ms",
						},
				  }),
	);

	useEffect(() => {
		// scroll back to top when new page is loaded
		window.scrollTo({ top: 0 });

		if (highlightCircle.current) {
			highlightCircle.current.classList.add("highlight");
			timer(
				() =>
					highlightCircle.current &&
					highlightCircle.current.classList.remove("highlight"),
				1500,
			);
		}

		if (nextBtn.current) {
			nextBtn.current.style.width = "4rem";
			timer(
				() => nextBtn.current && (nextBtn.current.style.right = "10vw"),
				300,
			);
		}

		if (containerChild.current) {
			const containerChildren = [...containerChild.current.children] as (
				| HTMLElement
				| SVGElement
			)[];
			containerChildren.forEach((child, idx) => {
				timer(() => {
					child.style.removeProperty("opacity");
					child.style.removeProperty("transform");
				}, 100 * idx);
			});

			timer(() => {
				document.body.style.maxHeight = "auto";
				document.body.style.overflow = "auto";
			}, containerChildren.length * 100);
		}

		// cleanup
		return clear;
	}, []);

	const handleResize = () => {
		if (containerChild.current && logoContainer.current)
			logoContainer.current.style.left = `${
				containerChild.current.getBoundingClientRect().x
			}px`;
	};

	useEffect(() => {
		window.addEventListener("resize", handleResize);

		// cleanup
		return () => window.removeEventListener("resize", handleResize);
	}, []);

	// on first render
	useLayoutEffect(handleResize, []);

	const handleNext: React.MouseEventHandler<HTMLButtonElement> = e => {
		if (containerChild.current) {
			(
				[...containerChild.current.children] as (HTMLElement | SVGElement)[]
			).forEach(child => {
				child.style.marginBottom = "2rem";
				child.style.opacity = "0";
			});
		}
		document.body.style.maxHeight = "100vh";
		document.body.style.overflow = "hidden";
		e.currentTarget.style.width = "0";
		timer(() => next && navigate(next), 300);
	};

	return (
		<div
			className={css`
				background: var(--background-colour);
				padding: 15rem calc(100vw / 8) 8rem calc(100vw / 8);
				overflow-x: hidden;
				min-height: 100vh;
				position: relative;
			`}>
			{!hideNav && (
				<button
					ref={logoContainer}
					className={css`
						position: absolute;
						top: 8rem;
						left: 5rem;
						background: none;
						border: 0;
						font-size: 1rem;
					`}
					onMouseOver={() => !mobile && setShowMenu(true)}
					onMouseOut={() => !mobile && setShowMenu(false)}>
					<span
						ref={highlightCircle}
						className={cx(
							css`
								position: absolute;
								left: 0;
								height: 5rem;
								width: 5rem;
								border-radius: 100%;
								box-shadow: 0px 0px 50px 0px rgba(100, 100, 100, 0.65);
								cursor: pointer;

								& > svg {
									width: 100%;
									height: 100%;
									position: absolute;
									inset: 0;
									z-index: 1;
								}

								&::before {
									content: "";
									position: absolute;
									left: -0.1rem;
									width: 5rem;
									height: 5rem;
									border-radius: 100%;
									background: var(--primary-colour);
									z-index: 0;
									opacity: 0;
									cursor: pointer;

									transition: all 600ms;
								}

								&:hover::before,
								&.highlight::before {
									opacity: 1;
								}

								&:hover::before {
									width: 5.2rem;
									height: 5.2rem;
									top: -0.05rem;
									left: -0.1rem;
								}

								&.highlight::before {
									width: 5.6rem;
									height: 5.6rem;
									top: -0.3rem;
									left: -0.3rem;
								}
							`,
						)}>
						<Logo
							viewBox="0 0 264 264"
							onClick={() => (mobile ? setShowMenu(true) : navigate("/"))}
						/>
					</span>
					<Menu show={showMenu} setShowMenu={setShowMenu} />
				</button>
			)}
			{next && (
				<button
					onClick={handleNext}
					ref={nextBtn}
					title={end ? "Back to start" : "Next page"}
					className={css`
						position: fixed;
						right: 14vw;
						bottom: 10vh;
						z-index: 500;
						background: none;
						padding: 0;
						font-weight: 500;
						cursor: pointer;
						letter-spacing: 0.2rem;
						border: none;
						overflow: hidden;
						width: 0;
						transition: all 300ms;
						overflow: hidden;

						${end ? "rotate: 180deg;" : ""}

						&:hover * {
							fill: var(--primary-colour);
						}
					`}>
					<Right
						className={css`
							height: "2rem";
							width: "2rem";
						`}
					/>
				</button>
			)}
			<div
				className={cx(
					css`
						width: 100%;
						max-width: 60rem;
						min-height: 100%;
						margin: auto;

						& > * {
							margin-bottom: 2rem;
						}
					`,
					className,
				)}
				ref={containerChild}
				{...props}>
				{children}
			</div>
		</div>
	);
};

export default Container;