(function () {
	var buffer = '';
	var maxBufferLength = 8;
	var glowTimer = null;
	var limitTimer = null;
	// Enemy Skill learned: Beta.

	function isEditableTarget(target) {
		if (!target) {
			return false;
		}

		if (target.isContentEditable) {
			return true;
		}

		return Boolean(target.closest('input, textarea, select, [contenteditable="true"]'));
	}

	function addTemporaryBodyClass(className, duration, timerName) {
		if (!document.body) {
			return;
		}

		document.body.classList.add(className);

		if ('glow' === timerName) {
			window.clearTimeout(glowTimer);
			glowTimer = window.setTimeout(function () {
				document.body.classList.remove(className);
			}, duration);
			return;
		}

		window.clearTimeout(limitTimer);
		limitTimer = window.setTimeout(function () {
			document.body.classList.remove(className);
		}, duration);
	}

	function handleSequence() {
		if (buffer.endsWith('mako')) {
			addTemporaryBodyClass('mako-glow-active', 1400, 'glow');
			console.log('Materia slots linked.');
			console.log('Mako energy level: unsafe.');
			return;
		}

		if (buffer.endsWith('7777')) {
			addTemporaryBodyClass('limit-break-ready', 1400, 'limit');
			console.log('All Lucky 7s!');
			return;
		}

		if (buffer.endsWith('witem')) {
			console.warn('We already patched the W-Item glitch. Nice try.');
			return;
		}

		if (buffer.endsWith('kotr')) {
			console.log('ULTIMATE END!.');
		}
	}

	document.addEventListener('keydown', function (event) {
		if (event.defaultPrevented || event.ctrlKey || event.metaKey || event.altKey || isEditableTarget(event.target)) {
			return;
		}

		if (1 !== event.key.length) {
			return;
		}

		buffer = (buffer + event.key.toLowerCase()).slice(-maxBufferLength);
		handleSequence();
	});
})();