/* House keeping */
var socket = new WebSocket('wss://' + document.domain + SCRIPT_NAME + '/ws/quest/' + quest_id + '/');
socket.oldSend = socket.send;
socket.send = function(event_title, data) {
	data = JSON.stringify({event: event_title, data: data});
	socket.oldSend.apply(this, [data]);
}
socket.events = {};
socket.onmessage = function(e) {
	let data = JSON.parse(e.data);
	let event = data.event;
	data = data.data;
	if (socket.events[event] === undefined) { return; }
	socket.events[event](data);
}
function load() {
	document.getElementById('chatWindow').scrollTop = document.getElementById('chatWindow').scrollHeight;
	let mtarea = document.getElementById('messageTextArea');
	mtarea.addEventListener('keypress', function(event) {
		if (event.key === 'Enter' && !event.shiftKey) {
			let text = mtarea.value.trim();
			mtarea.value = '';
			if (text === '') { return; }
			document.getElementById('chatWindow').scrollTop = document.getElementById('chatWindow').scrollHeight;
			socket.send('message', {message: text, quest_id: quest_id});
		}
	});
}

/* Websocket receive */
socket.events['message'] = function(data) {
	let msg_str = '<div id="message-' + data.message_id + '" class="message">';
	msg_str = '<div class="messageHeader"><span class="messageName">' + data.name + '</span> ';
	msg_str += '<span class="messageDate">' + strftime(data.date) + '</span> ';
	msg_str += '<span class="messageID">No.<a href="javascript:quote(' + data.message_id + ')">' + data.message_id + '</a></span></div>';
	msg_str += '<div class="messageContent">' + data.message + '</div></div><hr>';

	let mbox = document.getElementById('chatWindow');
	mbox.innerHTML = mbox.innerHTML + msg_str;
	if ((mbox.scrollTop + mbox.offsetHeight) >= (mbox.scrollHeight - mbox.clientHeight / 2)) {
		mbox.scrollTop = mbox.scrollHeight;
	}
}
socket.events['new_post'] = function(data) {
	let qposts = document.getElementById('questPosts');
	let post_str = '<div class="questPost ';
	if (data.post_type === 'text') {
		post_str += 'textPost">';
	} else if (data.post_type === 'dice') {
		post_str += 'dicePost active_post">';
	} else if (data.post_type === 'poll') {
		post_str += 'pollPost active_post">';
	}
	post_str += '<div class="questPostMeta">' + data.date;
	post_str += '</div><div class="questPostData" id="questPostData-' + data.post_id + '">';
	if (data.post_type === 'text') {
		post_str += data.post_text;
	} else if (data.post_type === 'dice') {
		post_str += '<h3>' + data.post_text + ' - Open</h3>';
	} else if (data.post_type === 'poll') {
		post_str += '<h3>' + data.post_text + ' - Open</h3>';
		post_str += '<table class="poll" id="poll-' + data.post_id + '">';
		for (let i = 0; i < data.options.length; i++) {
			post_str += '<tr id="optionRow-' + data.options[i] + '">';
			post_str += '<td class="pollCheckBox"><input type="checkbox" id="pollInput-' + data.options[i][0] + '" onchange="vote(' + data.post_id + ',' + data.options[i][0] + ')"/>';
			post_str += '<label for="pollInput-' + data.options[i][0] + '"></label></td>';
			post_str += '<td class="option_text">' + data.options[i][1] + '</td>';
			post_str += '<td class="optionVotes">0</td></tr>';
		}
		post_str += '</table>';
		if (data.allow_writein) {
			post_str += '<div id="writeinContainer">';
			post_str += 'Write-in: <input type="text" id="writeinInput" placeholder="Custom choice..." maxlength="200" /><br />';
			post_str += '<input type="submit" id="writeinSubmit" value="Submit" onclick="submitWritein({{ quest_post[0] }});"/></div>';
		}
	}
	post_str += '</div></div><br />';
	qposts.innerHTML = qposts.innerHTML + post_str;
};
socket.events['close_post'] = function(data) {
	close_post(data.post_id);
}
socket.events['open_post'] = function(data) {
	open_post(data.post_id);
}
socket.events['close_all_posts'] = function(data) {
	let class_set = '';
	if (data.post_type === 'dice') { class_set = 'dicePost activePost'; }
	else if (data.post_type === 'poll') { class_set = 'pollPost activePost'; }
	else { class_set = 'activePost'; }
	let posts = document.getElementsByClassName(class_set);
	for (let i = 0; i < posts.length; i++) {
		close_post(posts[i].children[1].id.slice(14)); // retreive the id number at the end
	}
}
socket.events['update_post'] = function(data) {
	let post = document.getElementById('questPostData-' + data.post_id);
	if (data.post_type === 'text') {
		post.innerHTML = data.post_text;
	} else if (data.post_type === 'dice') {
		post.innerHTML += '<b>' + data.post_text + '</b><br>';
	} else if (data.post_type === 'poll') {
		let row = post.children[1].insertRow(-1);
		let cell = row.insertCell(0);
		cell.className = 'pollCheckBox';
		cell.innerHTML = '<input type="checkbox" id="pollInput-' + data.options_id + '" onchange="vote(' + data.post_id + ',' + data.options_id + ')"/>';
		cell.innerHTML += '<label for="pollInput-' + data.options_id + '"></label>';

		cell = row.insertCell(1);
		cell.className = 'option_text';
		cell.innerHTML = data.option_text;

		cell = row.insertCell(2);
		cell.className = "optionVotes";
		cell.innerHTML = "0";
	}
}
socket.events['vote'] = function(data) {
	let row = document.getElementById('optionRow-' + data.option_id);
	if (data.polarity) {
		row.cells[2].textContent = Number(row.cells[2].textContent) + 1;
	} else {
		row.cells[2].textContent = Number(row.cells[2].textContent) - 1;
	}
	let table = row.parentElement.parentElement;
	arr = Array.prototype.slice.call(table.rows);
	arr.sort(sort_by_votes);
	let new_tbody = document.createElement('tbody');
	for (let i = 0; i < arr.length; i++) {
		new_tbody.appendChild(arr[i]);
	}
	table.replaceChild(new_tbody, table.children[0]);
}
socket.events['set_option_box'] = function(data) {
	document.getElementById('pollInput-' + data.option_id).checked = data.polarity;
}

/* Websocket send */
function vote(post_id, option_id) {
	let polarity = document.getElementById('pollInput-' + option_id).checked;
	socket.send('vote', {post_id: post_id, option_id: option_id, polarity: polarity, quest_id: quest_id});
}

/* Helpers */
function padToTwo(number) {
	if (number<=99) { number = ("0"+number).slice(-2); }
	return number;
}
function strftime(date) {
	date = new Date(date * 1000);
	let date_str = date.getFullYear() + '-' + padToTwo(date.getMonth()+1) + '-' + padToTwo(date.getDate()) + ' ';
	date_str += padToTwo(date.getHours()) + ':' + padToTwo(date.getMinutes()) + ':' + padToTwo(date.getSeconds());
	return date_str;
}
function sort_by_votes(a, b) {
	return b.cells[2].textContent.localeCompare(a.cells[2].textContent);
}

/* DOM editing */
function quote(message_id) {
	let textbox = document.getElementById('messageTextArea');
	textbox.value += '>>' + message_id + '\n';
	textbox.focus();
}
function show_preview(event, message_id) {
	let elem = document.getElementById('msg-' + message_id);
	if (!elem) { return; }
	let preview = document.getElementById('preview');
	preview.innerHTML = elem.innerHTML;
	preview.style.display = '';
	let x = event.clientX + 20 + 'px';
	let y = event.clientY + 20 + 'px';
	let maxWidth = window.innerWidth - event.clientX - 80 + 'px';
	preview.style.top = y;
	preview.style.left = x;
	preview.style.maxWidth = maxWidth;
}
function clear_preview() {
	document.getElementById('preview').innerHTML = '';
	document.getElementById('preview').style.display = 'none';
}
function scroll_to_msg(message_id) {
	let elem = document.getElementById('msg-' + message_id);
	if (!elem) { return; }
	elem.scrollIntoView();
}
function close_post(post_id) {
	let post = document.getElementById('questPostData-' + post_id);
	post.children[0].textContent = post.children[0].textContent.replace('Open', 'Closed');
	if (post.parentElement.classList.contains('pollPost')) {
		let table = document.getElementById('poll-' + post_id);
		let boxes = table.getElementsByTagName('input');
		for (let i = 0; i < boxes.length; i++) {
			boxes[i].disabled = true;
		}
		let writein = document.getElementById('writeinContainer');
		if (writein) {
			writein.style.display = 'none';
		}
	}
}
function open_post(post_id) {
	let post = document.getElementById('questPostData-' + post_id);
	post.firstElementChild.textContent = post.firstElementChild.textContent.replace('Closed', 'Open');
	post.parentElement.className += ' activePost';
	if (post.parentElement.classList.contains('pollPost')) {
		let table = document.getElementById('poll-' + post_id);
		let boxes = table.getElementsByTagName('input');
		for (let i = 0; i < boxes.length; i++) {
			boxes[i].disabled = false;
		}
		let writein = document.getElementById('writeinContainer');
		if (writein) {
			writein.style.display = 'initial';
		}
	}
}