let oi_timeout;
function oi() {
	document.getElementById('oi').style.visibility = 'visible';

	oi_timeout = setTimeout(() => { oi_timeout = null; clearOi(); }, 3000);
}

function clearOi() {
	document.getElementById('oi').style.visibility = 'hidden';

	if (oi_timeout) {
		clearTimeout(oi_timeout);
		oi_timeout = null;
	}
}

function scheduleCCall(f, ms, ...args) {
	let types = [];
	let vals = [];

	for (let i = 0; i < args.length/2; i++)
		vals[i] = (types[i] = UTF8ToString(args[i*2])) == 'string' ?
			UTF8ToString(args[i*2+1]) : args[i*2+1];

	let func = UTF8ToString(f);
	setTimeout(() => Module.ccall(func, null, types, vals), ms);
}

function _promptGet() {
	return document.getElementById('prompt-input').textContent;
}

function _promptGetAndClear() {
	let val = _promptGet();
	promptHandle('clear');
	return val;
}

function _promptDeleteLast() {
	let e = document.getElementById('prompt-input');
	e.textContent = e.textContent.slice(0, -1);
}

function _promptClear() {
	document.getElementById('prompt-input').textContent = '';
}

let prompt_handler;
let prompt_handlers = {
	visit: {
		append(val) {
			let e = document.getElementById('prompt-input');
			if (e.textContent.length < 3) {
				e.textContent += val;
				this._update_rem();
			}
		},

		backspace() {
			_promptDeleteLast();
			this._update_rem();
		},

		clear() {
			_promptClear();
			this._update_rem();
		},

		submit() {
			let pts = _promptGetAndClear();
			if (pts)
				Module.ccall('user_visit', 'number', ['number'], [pts]);
		},

		submit_rem() {
			let rem = _promptGetAndClear();
			if (rem)
				Module.ccall('user_visit_to_rem', 'number', ['number'], [rem]);
		},

		undo() {
			this.clear();
			let cl = document.getElementById('key_undo').classList;
			if (cl.contains('active'))
				Module.ccall('user_undo');
			cl.toggle('active');
		},

		pre(action) {
			clearOi();
			if (action != 'undo')
				document.getElementById('key_undo').classList.remove('active');
		},

		_update_rem(val) {
			Module.ccall('update_user_rem_from_pts', null,
				['number'], [val || _promptGet()]);
		}
	},

	num_darts: {
		append(val) {
			let e = document.getElementById('prompt-input');
			if (e.textContent.length < 3)
				e.textContent += val;
		},

		backspace() {
			_promptDeleteLast();
		},

		clear() {
			_promptClear();
		},

		submit() {
			let n = _promptGetAndClear();
			if (n)
				Module.ccall('resp_numdarts', null, ['number'], [n]);
		},

		pre(action) {
			clearOi();
		}
	},

	init: {
		submit() {
			Module.ccall('start_match');
		},

		pre(action) {
			clearOi();
		}
	}
}

function setPromptHandler(ptr) {
	prompt_handler = prompt_handlers[UTF8ToString(ptr)];
}

function promptHandle(action, ...args) {
	prompt_handler?.pre?.(action);
	prompt_handler?.[action]?.(...args);
}

function setPromptInput(ptr) {
	document.getElementById('prompt-input').textContent = UTF8ToString(ptr);
}

function promptMsgL(p) {
	document.getElementById('prompt-msg-l').textContent = UTF8ToString(p);
}

function promptMsgR(p) {
	document.getElementById('prompt-msg-r').textContent = UTF8ToString(p);
}

function setPlayerActive(n) {
	document.querySelectorAll('[id$=-info]').forEach(e =>
		e.classList[n && e.id == `p${n}-info` ? 'add' : 'remove']('active'));
}

function updatePlayerRem(n, ptr) {
	document.getElementById(`p${n}-rem`).textContent = UTF8ToString(ptr);
}

function updatePlayerName(n, ptr) {
	document.getElementById(`p${n}-name`).textContent = UTF8ToString(ptr);
}

function updatePlayerSugg(n, ptr) {
	document.getElementById(`p${n}-sugg`).textContent = UTF8ToString(ptr);
}

function updatePlayerAvg(n, avg) {
	document.getElementById(`p${n}-avg`).textContent = avg.toFixed(2);
}

function clearVisits() {
	document.getElementById('visits').textContent = '';
}

const POINT_CLASSES = [180, 140, 100, 60, 40, 20, 1, 0];
function drawVisit(visit_no, p1_pts, p1_rem, p2_pts, p2_rem, p2_darts) {
	let e = document.getElementById('visits');

	for (let [i, ptr] of [
		p1_pts, p1_rem, visit_no, p2_rem, p2_pts, p2_darts].entries()) {

		let div = e.appendChild(document.createElement('div'));
		let v = div.textContent = UTF8ToString(ptr);
		div.classList.add(`visit-col${i+1}`);
		if (i == 0 || i == 4)
			div.classList.add(`p${POINT_CLASSES.find(x => x <= v)}`);
		else if (i == 5 && v)
			div.textContent = `… ${v}`;
	}

	e.scrollTop = e.scrollHeight;
}

function setDelay(val, update_opts = true) {
	if (update_opts) localStorage.setItem('dartboat_delay', val);
	Module.ccall('set_delay', null, ['number'], [val]);
}

function updateDelay(val) {
	document.getElementById('delay').value = val;
}

function setStdev(val, update_opts = true) {
	if (update_opts) localStorage.setItem('dartboat_stdev', val);
	Module.ccall('set_stdev', null, ['number', 'number'], [val, val]);
}

function updateStdev(val) {
	document.getElementById('stdev').value = val;
}

function read_opts() {
	let val;

	if ((val = localStorage.getItem('dartboat_delay')))
		setDelay(val, false);

	if ((val = localStorage.getItem('dartboat_stdev')))
		setStdev(val, false);
}

function modal(id) {
	document.getElementById(id).style.display = 'block';
}

document.addEventListener('click', e => {
	if (e.target.classList.contains('modal')) e.target.style.display = 'none';
});

document.addEventListener('keydown', e => {
	if (e.altKey || e.ctrlKey || e.metaKey || e.target.type == 'text')
		return;

	if (isFinite(e.key))
		promptHandle('append', e.key);
	else if (e.key == 'Enter')
		promptHandle('submit');
	else if (e.key == 'Backspace')
		promptHandle('backspace');
	else if (e.key == 'c')
		promptHandle('clear');
	else if (e.key == 'r')
		promptHandle('submit_rem');
	else if (e.key == 'u')
		promptHandle('undo');
});