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);
}

let prompt_handler;
let prompt_handlers = {
	default: {
		_get() {
			return document.getElementById('prompt-input').textContent;
		},

		_get_and_clear() {
			let val = this._get();
			this.clear();
			return val;
		},

		_pre(action) {
			clearOi();
		},

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

		backspace() {
			let e = document.getElementById('prompt-input');
			let tc = e.textContent = e.textContent.slice(0, -1);
			this._on_change?.(tc);
		},

		clear() {
			let tc = document.getElementById('prompt-input').textContent = '';
			this._on_change?.(tc);
		}
	}
}

prompt_handlers.default_with_undo = {
	__proto__: prompt_handlers.default,

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

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

prompt_handlers.visit = {
	__proto__: prompt_handlers.default_with_undo,

	_on_change(val) {
		Module.ccall('update_user_rem_from_pts', null,
			['number'], [val || this._get()]);
	},

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

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

prompt_handlers.num_darts = {
	__proto__: prompt_handlers.default_with_undo,

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

prompt_handlers.match_over = {
	__proto__: prompt_handlers.default_with_undo,

	append() {},

	submit() {
		Module.ccall('match_init');
	}
};

prompt_handlers.init = {
	__proto__: prompt_handlers.default,
	_keypad: 'init',

	submit() {
		let v = this._get_and_clear();
		if (v)
			Module.ccall('start_match', null, ['number'], [v]);
	}
};

function setPromptHandler(ptr) {
	prompt_handler = prompt_handlers[UTF8ToString(ptr)];
	document.getElementById('prompt').classList[
		prompt_handler ? 'add' : 'remove']('active');

	let keypad_id = `keypad-${prompt_handler?._keypad || 'default'}`;
	document.querySelectorAll('.keypad').forEach(e => {
		e.style.display = e.id === keypad_id ? '' : 'none';
	});
}

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 hidePlayerInfo(n) {
	let elems = document.getElementById(`p${n}-info`).children;
	for (let i = 0; i < elems.length; ++i)
		elems[i].style.visibility = 'hidden';
}

function showPlayerInfo(n) {
	let elems = document.getElementById(`p${n}-info`).children;
	for (let i = 0; i < elems.length; ++i)
		elems[i].style.removeProperty('visibility');
}

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, 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');
});