//var ttss_base = 'http://www.ttss.krakow.pl/internetservice';
var ttss_base = '/proxy.php';
var ttss_refresh = 20000; // 20 seconds

var page_title = document.getElementsByTagName('title')[0];
var ignore_hashchange = false;

var language = 'en';
var lang_select = document.getElementById('lang-select');

var stop_id;
var stop_name = document.getElementById('stop-name');
var stop_name_form = stop_name.form;
var stop_name_autocomplete = document.getElementById('stop-name-autocomplete');
var stop_name_autocomplete_xhr;
var stop_name_autocomplete_timer;

var times_xhr;
var times_timer;
var times_stop_name = document.getElementById('times-stop-name');
var times_alerts = document.getElementById('times-alerts');
var times_table = document.getElementById('times-table');
//var times_lines = document.getElementById('times-lines');

var route_id;
var route_xhr;
var route_line = document.getElementById('route-line');
var route_table = document.getElementById('route-table');

var refresh_button = document.getElementById('refresh');
var refresh_text = document.getElementById('refresh-text');
var refresh_time;
var refresh_timer;

var alert = document.getElementById('alert');
var alert_text = document.getElementById('alert-text');
var alert_close = document.getElementById('alert-close');

var nav = document.getElementsByTagName('nav')[0];

function parseStatus(status) {
	switch(status.status) {
		case 'STOPPING':
			return lang.boarding_sign;
		case 'PREDICTED':
			if(status.actualRelativeTime <= 0)
				return lang.boarding_sign;
			if(status.actualRelativeTime >= 60)
				return lang.time_minutes_prefix + Math.floor(status.actualRelativeTime / 60) + lang.time_minutes_suffix;
			return lang.time_seconds_prefix + status.actualRelativeTime + lang.time_seconds_suffix;
		case 'DEPARTED':
			return lang.time_minutes_ago_prefix + Math.floor(-status.actualRelativeTime / 60) + lang.time_minutes_ago_suffix;
		default:
			return status.mixedTime;
	}
}

function parseTime(date, time) {
	var result = new Date(date.getFullYear(), date.getMonth(), date.getDay());
	var time_split = time.split(':');
	result.setHours(time_split[0]);
	result.setMinutes(time_split[1]);
	
	if(result.getTime() - date.getTime() > 72000000) {
		result.setTime(result.getTime() - 86400000);
	}
	
	if(date.getTime() - result.getTime() > 72000000) {
		result.setTime(result.getTime() + 86400000);
	}
	
	return result;
}

function parseDelay(status) {
	if(!status.actualTime) return lang.unknown_sign;
	if(!status.plannedTime) return lang.unknown_sign;
	
	var now = new Date();
	var actual = parseTime(now, status.actualTime);
	var planned = parseTime(now, status.plannedTime);
	
	return lang.time_minutes_prefix + ((actual.getTime() - planned.getTime()) / 1000 / 60) + lang.time_minutes_suffix;
}

function displayVehicle(vehicleInfo) {
	if(!vehicleInfo) return document.createTextNode('');
	
	var span = document.createElement('span');
	span.className = 'vehicleInfo';
	
	var floor_type = '';
	if(vehicleInfo.low == 0) {
		setText(span, lang.high_floor_sign);
		floor_type = lang.high_floor;
	} else if(vehicleInfo.low == 1) {
		setText(span, lang.partially_low_floor_sign);
		floor_type = lang.partially_low_floor;
	} else if(vehicleInfo.low == 2) {
		setText(span, lang.low_floor_sign);
		floor_type = lang.low_floor;
	}
	
	span.title = lang.tram_type_pattern
		.replace('$num', vehicleInfo.num)
		.replace('$type', vehicleInfo.type)
		.replace('$floor', floor_type);
	
	return span;
}

function fail(message, more) {
	if(times_timer) clearTimeout(times_timer);
	
	setText(alert_text, message);
	alert.style.display = 'block';
	
	console.log(message + ' More details follow.');
	if(more) console.log(more);
}

function fail_ajax(data) {
	// abort() is not a failure
	if(data.readyState == 0 && data.statusText == 'abort') return;
	
	if(data.status == 0) {
		fail(lang.error_request_failed_connectivity, data);
	} else if (data.statusText) {
		fail(lang.error_request_failed_status.replace('$status', data.statusText), data);
	} else {
		fail(lang.error_request_failed, data);
	}
}

function fail_hide() {
	alert.style.display = 'none';
}

function loading_start() {
	nav.className += ' loading';
}

function loading_end() {
	nav.className = nav.className.replace(' loading', '');
}

function loadTimes(stopId) {
	if(!stopId) stopId = stop_id;
	if(!stopId) return;
	
	if(times_timer) clearTimeout(times_timer);
	if(times_xhr) times_xhr.abort();
	
	console.log('loadTimes(' + stopId + ')');
	stop_id = stopId;
	
	ignore_hashchange = true;
	window.location.hash = '#!' + language + stopId;
	ignore_hashchange = false;
	refresh_button.removeAttribute('disabled');
	
	loading_start();
	times_xhr = $.get(
		ttss_base + '/services/passageInfo/stopPassages/stop'
			+ '?stop=' + encodeURIComponent(stopId)
			+ '&mode=departure'
	).done(function(data) {
		setText(times_stop_name, data.stopName);
		setText(page_title, lang.page_title_stop_name.replace('$stop', data.stopName));
		deleteChildren(times_alerts);
		deleteChildren(times_table);
		//deleteChildren(times_lines);
		
		for(var i = 0, il = data.generalAlerts.length; i < il; i++) {
			addParaWithText(times_alerts, data.generalAlerts[i].title);
		}
		
		for(var i = 0, il = data.old.length; i < il; i++) {
			var tr = document.createElement('tr');
			addCellWithText(tr, data.old[i].patternText);
			var dir_cell = addCellWithText(tr, data.old[i].direction);
			dir_cell.appendChild(displayVehicle(parseVehicle(data.old[i].vehicleId)));
			var status = parseStatus(data.old[i]);
			addCellWithText(tr, status);
			addCellWithText(tr, '');
			
			tr.className = 'active';
			tr.addEventListener('click', function(tripId){ return function(){ loadRoute(tripId); } }(data.old[i].tripId) );
			times_table.appendChild(tr);
		}
		
		for(var i = 0, il = data.actual.length; i < il; i++) {
			var tr = document.createElement('tr');
			addCellWithText(tr, data.actual[i].patternText);
			var dir_cell = addCellWithText(tr, data.actual[i].direction);
			dir_cell.appendChild(displayVehicle(parseVehicle(data.actual[i].vehicleId)));
			var status = parseStatus(data.actual[i]);
			var status_cell = addCellWithText(tr, status);
			var delay = parseDelay(data.actual[i]);
			var delay_cell = addCellWithText(tr, delay);
			
			if(status == lang.boarding_sign) {
				tr.className = 'success';
				status_cell.className = 'status-boarding';
			} else if(parseInt(delay) > 9) {
				tr.className = 'danger';
				delay_cell.className = 'status-delayed';
			} else if(parseInt(delay) > 3) {
				tr.className = 'warning';
			}
			
			tr.addEventListener('click', function(tripId){ return function(){ loadRoute(tripId); } }(data.actual[i].tripId) );
			times_table.appendChild(tr);
		}
		
		/*
		for(var i = 0, il = data.routes.length; i < il; i++) {
			var tr = document.createElement('tr');
			addCellWithText(tr, data.routes[i].name);
			addCellWithText(tr, data.routes[i].directions.join(' - '));
			addCellWithText(tr, data.routes[i].authority);
			times_lines.appendChild(tr);
		}
		*/
		
		startTimer(new Date());
		fail_hide();
		
		times_timer = setTimeout(function(){ loadTimes(); loadRoute(); }, ttss_refresh);
	}).fail(fail_ajax).always(loading_end);
}

function loadRoute(tripId) {
	if(!tripId) tripId = route_id;
	if(!tripId) return;
	
	console.log('loadRoute(' + tripId + ')');
	route_id = tripId;
	
	if(route_xhr) route_xhr.abort();
	route_xhr = $.get(
		ttss_base + '/services/tripInfo/tripPassages'
			+ '?tripId=' + encodeURIComponent(tripId)
			+ '&mode=departure'
	).done(function(data) {
		if(!data.routeName || !data.directionText || data.old.length + data.actual.length == 0) {
			route_id = null;
			return;
		}
		
		setText(route_line, data.routeName + ' ' + data.directionText);
		deleteChildren(route_table);
		
		for(var i = 0, il = data.old.length; i < il; i++) {
			var tr = document.createElement('tr');
			addCellWithText(tr, data.old[i].actualTime || data.old[i].plannedTime);
			addCellWithText(tr, data.old[i].stop_seq_num + '. ' + data.old[i].stop.name);
			
			tr.className = 'active';
			tr.addEventListener('click', function(stopId){ return function(){ loadTimes(stopId); } }(data.old[i].stop.shortName) );
			route_table.appendChild(tr);
		}
		
		for(var i = 0, il = data.actual.length; i < il; i++) {
			var tr = document.createElement('tr');
			addCellWithText(tr, data.actual[i].actualTime || data.actual[i].plannedTime);
			addCellWithText(tr, data.actual[i].stop_seq_num + '. ' + data.actual[i].stop.name);
			
			if(data.actual[i].status == 'STOPPING') {
				tr.className = 'success';
			}
			tr.addEventListener('click', function(stopId){ return function(){ loadTimes(stopId); } }(data.actual[i].stop.shortName) );
			route_table.appendChild(tr);
		}
	}).fail(fail_ajax);
}

function startTimer(date) {
	if(date) {
		setText(refresh_text, lang.last_refreshed.replace('$time', lang.time_now));
		refresh_time = date;
	}
	if(!refresh_time) return;
	if(refresh_timer) clearInterval(refresh_timer);
	
	var now = new Date();
	var ms = now.getTime() - refresh_time.getTime();
	
	var interval = 1000;
	if(ms >= 120000) interval = 60000;
	
	refresh_timer = setInterval(function() {
		var now = new Date();
		var ms = now.getTime() - refresh_time.getTime();
		
		if(ms >= 120000) {
			setText(refresh_text, lang.last_refreshed.replace(
				'$time',
				lang.time_minutes_ago_prefix + Math.floor(ms / 60000)
					+ lang.time_minutes_ago_suffix
			));
			startTimer();
		} else {
			setText(refresh_text, lang.last_refreshed.replace(
				'$time',
				lang.time_seconds_ago_prefix + Math.floor(ms / 1000)
					+ lang.time_seconds_ago_suffix
			));
		}
	}, interval);
}

function translate() {
	var elements = document.querySelectorAll('*[data-translate]');
	
	var text_name;
	for(var i = 0; i < elements.length; i++) {
		text_name = elements[i].dataset.translate;
		if(lang[text_name] == undefined) {
			console.log('Missing translation: ' + text_name);
			continue;
		}
		setText(elements[i], lang[text_name]);
	}
	
	stop_name.setAttribute('placeholder', lang.stop_name_placeholder);
	
	if(stop_id) return;
	
	setText(page_title, lang.page_title);
	
	if(stop_name_autocomplete.value) {
		setText(refresh_text, lang.select_stop_click_go);
	} else {
		setText(refresh_text, lang.enter_stop_name_to_begin);
	}
	
	loadTimes();
	loadRoute();
}

function change_language(lang) {
	if(!lang || lang.length != 2) return;
	if(lang == language) return;
	lang_select.value = lang;
	if(!lang_select.value) {
		lang_select.value = language;
		return;
	}
	language = lang;
	
	var script = document.createElement('script');
	script.type = 'text/javascript';
	script.src = 'lang_' + lang + '.js';
	script.id = 'lang_script';
	script.onload = translate;
	
	document.body.removeChild(document.getElementById('lang_script'));
	document.body.appendChild(script);
	
	ignore_hashchange = true;
	window.location.hash = '#!' + language + stop_id;
	ignore_hashchange = false;
}

function hash() {
	if(ignore_hashchange) return;
	
	if(window.location.hash.match(/^#![0-9]+$/)) {
		loadTimes(parseInt(window.location.hash.substr(2)));
	} else if(window.location.hash.match(/^#![a-z]{2}[0-9]*$/)) {
		var stop = parseInt(window.location.hash.substr(4));
		if(stop) stop_id = stop;
		change_language(window.location.hash.substr(2, 2));
	}
}

function stop_autocomplete() {
	if(stop_name_autocomplete_xhr) stop_name_autocomplete_xhr.abort();
	
	stop_name_autocomplete_xhr = $.get(
		'stops.php?query=' + encodeURIComponent(stop_name.value)
	).done(function(data) {
		deleteChildren(stop_name_autocomplete);
		for(var i = 0, il = data.length; i < il; i++) {
			if(data[i].type != 'stop') continue;
			if(data[i].id > 6000) continue;
			var opt = document.createElement('option');
			opt.value = data[i].id;
			setText(opt, decodeEntities(data[i].name));
			stop_name_autocomplete.appendChild(opt);
		}
		
		if(!stop_id) setText(refresh_text, lang.select_stop_click_go);
	}).fail(fail_ajax);
}

function init() {
	if(!window.jQuery) {
		fail(lang.jquery_not_loaded);
		return;
	}
	
	$.ajaxSetup({
		dataType: 'json',
		timeout: 10000,
	});
	
	lang_select.addEventListener('input', function(e) {
		change_language(lang_select.value);
	});
	
	stop_name.addEventListener('input', function(e) {
		if(!stop_name.value) return;
		if(stop_name_autocomplete_timer) clearTimeout(stop_name_autocomplete_timer);
		
		stop_name_autocomplete_timer = setTimeout(stop_autocomplete, 100);
	});
	
	setText(refresh_text, lang.enter_stop_name_to_begin);
	
	stop_name_form.addEventListener('submit', function(e) {
		e.preventDefault();
		if(!stop_name_autocomplete.value) return;
		loadTimes(stop_name_autocomplete.value);
	});
	
	refresh_button.addEventListener('click', function(e) {
		loadTimes();
		loadRoute();
	});
	
	alert_close.addEventListener('click', function(e) {
		alert.style.display = 'none';
	});
	
	hash();
	
	window.addEventListener('hashchange', hash);
}

init();