function adjust_size(divclass) {
	const cloze = document.querySelector(divclass);
	const inputs = cloze.querySelectorAll('input');
	inputs.forEach((input) => {
		if (input.type=="text") {
			input.setAttribute("value", "");
			input.setAttribute("style", "width: " + input.dataset.expected.length + "em");
		}
	});
}

function nomacron_to_macron(char) {
	var mapper = {	'A': 'Ā',
					'a': 'ā',
					'E': 'Ē',
					'e': 'ē',
					'I': 'Ī',
					'i': 'ī',
					'O': 'Ō',
					'o': 'ō',
					'U': 'Ū',
					'u': 'ū'};
	return mapper[char[0]];
}

function macron_to_nomacron(char) {
	var mapper = {	'Ā': 'A',
					'ā': 'a',
					'Ē': 'E',
					'ē': 'e',
					'Ī': 'I',
					'ī': 'i',
					'Ō': 'O',
					'ō': 'o',
					'Ū': 'U',
					'ū': 'u'};
	return mapper[char];
}

function to_nonmacron(input) {
	return input.replace(/Ā|ā|Ē|ē|Ī|ī/, macron_to_nomacron);
}

function to_macron(input) {
	return input.replace(/(\w)\1/, nomacron_to_macron);
}


function validate(divclass) {
	const pensum = document.querySelector(divclass);
	const inputs = pensum.querySelectorAll('input');
	
	inputs.forEach((input) => {
		if (input.type == "text") {
			is_nonmacron_ok = false;
			is_macron_ok = false;
			if (document.getElementById('vowel_length').checked == false) {
				is_nonmacron_ok = (to_nonmacron(input.value) == to_nonmacron(input.dataset.expected));
			} else {
				is_macron_ok = (input.value == input.dataset.expected);
			}
			if (is_nonmacron_ok || is_macron_ok) {
				input.setAttribute("class", "correct");
			} else {
				input.setAttribute("class", "incorrect");
			}
		}
	});

	return false;
}

function show_answers(divclass) {
	const cloze = document.querySelector(divclass);
	const inputs = cloze.querySelectorAll('input');
	
	inputs.forEach((input) => {
		if (input.type=="text") {
			input.value = input.dataset.expected;
			input.removeAttribute("class");
		}
	});
}