//find and place wg-ajax-button-switcher

function switcherPlacement() {
	const button_switcher_ajax = document.querySelectorAll(".weglot-custom-switcher-ajax")
	Array.prototype.forEach.call(button_switcher_ajax, function (el, i) {
		let button_target = document.querySelector(el.getAttribute('data-wg-target'))
		let button_sibling = document.querySelector(el.getAttribute('data-wg-sibling'))

		if (button_target && button_sibling) {
			button_target.insertBefore(el, button_sibling)
			el.classList.remove("weglot-custom-switcher-ajax")
		} else if (button_target) {
			button_target.insertBefore(el, button_target.firstChild)
			el.classList.remove("weglot-custom-switcher-ajax")
		} else if (button_sibling) {
			button_sibling.parentNode.insertBefore(el, button_sibling)
			el.classList.remove("weglot-custom-switcher-ajax")
		}
	})
}

//detect iframe
function inFrame() {
	try {
		return window.frameElement || window.self !== window.top;
	} catch (_) {
		return false;
	}
}

if (document.readyState === "loading") {
	document.addEventListener("DOMContentLoaded", () =>
		switcherPlacement()
	);
} else {
	switcherPlacement();
}

document.addEventListener("DOMContentLoaded", function (event) {

	function getOffset(element) {
		let top = 0, left = 0;
		do {
			top += element.offsetTop || 0;
			left += element.offsetLeft || 0;
			element = element.offsetParent;
		} while (element);

		return {
			top: top,
			left: left
		};
	}

	const button = document.querySelector(".country-selector");
	if (!button) {
		return;
	}
	const h = getOffset(button).top;
	const body = document.body, html = document.documentElement;
	const page_height = Math.max(body.scrollHeight, body.offsetHeight, html.clientHeight, html.scrollHeight, html.offsetHeight);

	const position = window.getComputedStyle(button).getPropertyValue("position");
	const bottom = window.getComputedStyle(button).getPropertyValue("bottom");
	const top = window.getComputedStyle(button).getPropertyValue("top");

	if ((position !== "fixed" && h > page_height / 2) || (position === "fixed" && h > 100)) {
		button.className += " weglot-invert";
	}

	//check if your page is load by an iframe
	if (inFrame()) {
		const switchers = document.querySelectorAll('.weglot-dropdown')
		if (switchers !== null) {
			[].forEach.call(switchers, function (switcher) {
				switcher.style.display = "none";
			});
		}
	}

	const asides = document.getElementsByClassName("country-selector");
	const isOpen = link => !link.className.includes("closed");
	let focusedLang;
	if (asides.length > 0) {
		const selectedLang = document.getElementsByClassName("wgcurrent");
		for (let aside of asides) {
			// accessiblity button
			const KEYCODE = {
				ENTER: 13,
				ESCAPE: 27,
				ARROWUP: 38,
				ARROWDOWN: 40,
			};

			const isOpenUp = () => {
				// If switcher is in second half of page, set weg-openup class
				const {bottom = 0} = aside.getBoundingClientRect();
				return bottom > window.innerHeight / 2;
			};

			const openSwitcher = () => {
				aside.classList.remove("closed");
				document.querySelectorAll(".country-selector.weglot-dropdown input").checked = true;
				aside.setAttribute("aria-expanded", "true");
			};

			const closeSwitcher = () => {
				aside.classList.add("closed");
				document.querySelectorAll(".country-selector.weglot-dropdown input").checked = false
				aside.setAttribute("aria-expanded", "false");
				if (focusedLang) {
					focusedLang.classList.remove("focus");
					focusedLang = null;
				}
			};

			const setAriaLabel = code => {
				const fullNameLang = getLangNameFromCode(code);
				aside.setAttribute("aria-activedescendant", "weglot-language-" + code);
				aside.setAttribute("aria-label", "Language selected: " + code);
			};

			const toggleSwitcher = () => {
				if (aside.classList.contains("closed")) {
					openSwitcher();
				} else {
					closeSwitcher();
				}
				if (focusedLang) {
					focusedLang.classList.remove("focus");
				}
				focusedLang = null;
			};

			// Toggle when focused and keydown ENTER
			aside.addEventListener("keydown", event => {
				if (event.keyCode === KEYCODE.ENTER) {
					//event.preventDefault();
					//selectedLang.click();
					for (var i = 0; i < selectedLang.length; i++) {
						selectedLang[i].click();
					}
					if (focusedLang) {
						const destinationLanguage = focusedLang.getAttribute("data-l");
						setAriaLabel(destinationLanguage);
						aside.focus();
					}
					toggleSwitcher();
					return;
				}
				if (
					event.keyCode === KEYCODE.ARROWDOWN ||
					event.keyCode === KEYCODE.ARROWUP
				) {
					event.preventDefault();
					moveFocus(event.keyCode);
					return;
				}
				if (event.keyCode === KEYCODE.ESCAPE && isOpen(aside)) {
					// Close switcher
					event.preventDefault();
					closeSwitcher();
					aside.focus();
				}
			});

			aside.addEventListener("click", event => {
				if (focusedLang) {
					const destinationLanguage = focusedLang.getAttribute("data-l");
					setAriaLabel(destinationLanguage);
					aside.focus();
				}
				toggleSwitcher();
				return;
			});

			const moveFocus = keyCode => {
				const direction =
					keyCode === KEYCODE.ARROWDOWN ? "nextSibling" : "previousSibling";
				const openUp = isOpenUp();

				if (!focusedLang || !isOpen(aside)) {
					// Focus the first or last language
					const selector = openUp ? "ul li.wg-li:last-child" : "ul li.wg-li";

					for (var i = 0; i < selectedLang.length; i++) {
						//selectedLang[i].click();
						focusedLang = selectedLang[i].parentNode.querySelector(selector);
					}

					if (!focusedLang) {
						return;
					}
					focusedLang.classList.add("focus");
					focusedLang.childNodes[0].focus();
					focusedLang.scrollIntoView({block: "center"});

					// if right direction, open it
					const needToOpen =
						(keyCode === KEYCODE.ARROWUP && openUp) ||
						(keyCode === KEYCODE.ARROWDOWN && !openUp);
					if (!isOpen(aside) && needToOpen) {
						openSwitcher();
					}
					return;
				}

				// Focus next or prev language, if exists
				if (!focusedLang[direction]) {
					// if last element, close it
					if (
						(keyCode === KEYCODE.ARROWUP && !openUp) ||
						(keyCode === KEYCODE.ARROWDOWN && openUp)
					) {
						closeSwitcher();
						aside.focus();
					}
					return;
				}

				focusedLang.classList.remove("focus");
				focusedLang = focusedLang[direction];
				focusedLang.classList.add("focus");
				focusedLang.childNodes[0].focus();
				focusedLang.scrollIntoView({block: "center"});
			};
		}
	}

	return false;
});