/*
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * Die Uhr.
 * @param clockarea   Das jQuery-gewrappte HTML-Element, auf dem die Uhr angezeigt werden soll.
 * @param themeElement Das HTML-Stylesheet-Tag, das das Theme-CSS referenziert.
 */
function Uhr(clockarea, settings) {
	this.id = Uhr.id++;
	this.timer = null;
	this.currentTheme = null;
	this.currentLayout = {};
	this.currentMinute = -1;
	this.initHTMLElements(clockarea, settings || {});
}
Uhr.id = 0;
Uhr.layouts = new Array();
Uhr.register = function (locale, layout) {
	Uhr.layouts[locale] = layout;
}
Uhr.prototype.toggle = function() {
	if (this.isOn()) {
		this.stop();
	} else {
		this.start();
	}
}
Uhr.prototype.start = function() {
	if (!this.isOn()) {
		var uhr = this;
		this.timer = window.setInterval(function() {uhr.update();}, 1000);
		this.update();
		jQuery.cookie('status' + this.id, 'on', {expires: 365, path: '/'});
	}
}
Uhr.prototype.stop = function() {
	if (this.isOn()) {
		window.clearInterval(this.timer);
		this.timer = null;
		this.update();
		jQuery.cookie('status' + this.id, 'off', {expires: 365, path: '/'});
	}
}
Uhr.prototype.isOn = function() {
	return this.timer != null;
}
Uhr.prototype.setLayout = function(locale) {
	var newLayout = Uhr.layouts[locale];
	if (newLayout !== undefined && newLayout != this.currentLayout) {
		this.currentLayout = newLayout;
		var renderer = new UhrRenderer(this.currentLayout, this.letterarea);
		renderer.render(this);
		jQuery.cookie('layout' + this.id, locale, {expires: 365, path: '/'});
	}
}
Uhr.prototype.setTheme = function(theme) {
	if (theme != this.currentTheme) {
		this.clockarea.removeClass(this.currentTheme);
		this.toggleSwitch.removeClass(this.currentTheme);
		this.clockarea.addClass(theme);
		this.toggleSwitch.addClass(theme);
		this.currentTheme = theme;
		jQuery.cookie('theme' + this.id, theme, {expires: 365, path: '/'});
	}
}
Uhr.prototype.update = function() {
	if (this.isOn()) {
		var now = new Date();
		if (now.getMinutes() == this.currentMinute) {
			return;
		}
		this.currentMinute = now.getMinutes();
		var dotMinute = this.getDotMinute(now);
		var hour = this.getHour(now);
		var coarseMinute = this.getCoarseMinute(now);
		this.clear();
		this.highlight('on');
		for (var i = 1; i <= dotMinute; i++) {
			this.highlight('dot' + i);
		}
		this.highlight('minute' + coarseMinute);
		hour = this.normalizeHour(hour);
		this.highlight('hour' + hour);
		if (coarseMinute == 0) {
			this.highlight('sharphour');
		}
	} else {
		this.clear();
		this.currentMinute = -1;
	}
}
Uhr.prototype.clear = function() {
	this.clockarea.find('.item').removeClass('active');
}
Uhr.prototype.highlight = function(itemClass) {
	this.clockarea.find('.item.' + itemClass).addClass('active');
}
Uhr.prototype.getHour = function(date) {
	if (typeof this.currentLayout.getHour === 'function') {
		return this.currentLayout.getHour(date);
	}
	var hour = date.getHours();
	if (date.getMinutes() >= 25) {
		return hour + 1;
	}
	return hour;
}
Uhr.prototype.getCoarseMinute = function(date) {
	if (typeof this.currentLayout.getCoarseMinute === 'function') {
		return this.currentLayout.getCoarseMinute(date);
	}
	var minutes = date.getMinutes();
	return minutes - this.getDotMinute(date);
}
Uhr.prototype.getDotMinute = function(date) {
	if (typeof this.currentLayout.getDotMinute === 'function') {
		return this.currentLayout.getDotMinute(date);
	}
	var minutes = date.getMinutes();
	return minutes % 5;
}
Uhr.prototype.normalizeHour = function(hour) {
	if (hour > 12) {
		hour %= 12;
	}
	if (hour == 0) {
		return 12;
	}
	return hour;
}
Uhr.prototype.initHTMLElements = function(clockarea, presets) {
	this.createHTMLElements(clockarea, presets.width);
	var force = presets.force || false;
	this.initToggleSwitch(presets.status, force);
	this.initLayoutSwitch(presets.layout, force);
	this.initThemeSwitch(presets.theme, force);
}
Uhr.prototype.createHTMLElements = function(clockarea, width) {
	this.createClockarea(clockarea, width)
	this.letterarea = this.clockarea.find('.letterarea');
	this.createToggleSwitch();
	this.createLayoutSwitch();
	this.createThemeSwitch();
}
Uhr.prototype.createClockarea = function(clockarea, width) {
	clockarea.addClass('uhr');
	clockarea.empty();
	clockarea.append('<span class="item dot dot1"></span>');
	clockarea.append('<span class="item dot dot2"></span>');
	clockarea.append('<span class="item dot dot3"></span>');
	clockarea.append('<span class="item dot dot4"></span>');
	clockarea.append('<div class="letterarea"></div>');
	clockarea.append('<div class="reflection"></div>');
	if(width == undefined) {
		width = '100%';
	}
	clockarea.css('width', width);
	var realWidth = clockarea.width()
	clockarea.width(realWidth);
	clockarea.height(realWidth);
	clockarea.css('font-size', (realWidth / 40) + 'px');
	this.clockarea = clockarea
}
Uhr.prototype.createToggleSwitch = function() {
	this.toggleSwitch = jQuery('<div class="onoffswitch"></div>');
	var input = jQuery('<input type="checkbox" name="onoffswitch' + this.id + '" class="onoffswitch-checkbox" id="onoffswitch' + this.id + '" checked="checked" />');
	this.toggleSwitch.append(input);
	this.toggleSwitch.append('<label class="onoffswitch-label" for="onoffswitch' + this.id + '">'
		+ '<div class="onoffswitch-inner"></div>'
		+ '<div class="onoffswitch-switch"></div>'
		+ '</label>');
	this.clockarea.after(this.toggleSwitch);
}
Uhr.prototype.createLayoutSwitch = function () {
	this.layoutSwitch = jQuery('<select></select>')
	for (var code in Uhr.layouts) {
		if (Uhr.layouts.hasOwnProperty(code)) {
			var layout = Uhr.layouts[code];
			var option = jQuery('<option value="' + code + '">' + layout.language + '</option>')
			this.layoutSwitch.append(option);
		}
	}
	this.clockarea.after(this.layoutSwitch);
}
Uhr.prototype.createThemeSwitch = function () {
	this.themeSwitch = jQuery('<select></select>');
	this.themeSwitch.append('<option value="black">Schwarz</option>');
	this.themeSwitch.append('<option value="red">Rot</option>');
	this.themeSwitch.append('<option value="blue">Blau</option>');
	this.themeSwitch.append('<option value="green">Grün</option>');
	this.themeSwitch.append('<option value="white">Weiss</option>');
	this.clockarea.after(this.themeSwitch);
}
Uhr.prototype.initToggleSwitch = function(defaultValue, overrideCookie) {
	var input = jQuery('#onoffswitch' + this.id);
	var uhr = this;
	input.on('click', function() {
		uhr.toggle();
	});
	var status = jQuery.cookie('status' + this.id);
	if (status == undefined || (overrideCookie && (defaultValue != undefined))) {
		status = defaultValue;
	}
	if (status == undefined || status == 'undefined') {
		status = 'on';
	}
	if (status == 'on') {
		this.start();
		input.prop('checked', true);
	} else {
		this.stop();
		input.prop('checked', false);
	}
}
Uhr.prototype.initLayoutSwitch = function(defaultValue, overrideCookie) {
	var uhr = this;
	this.layoutSwitch.on('change', function() {
		uhr.setLayout(this.value);
	});
	var selectedLayout = jQuery.cookie('layout' + this.id);
	if (selectedLayout == undefined || (overrideCookie && (defaultValue != undefined))) {
		selectedLayout = defaultValue;
	}
	if (selectedLayout == undefined) {
		// FIXME not nice, hardcoded default-value
		selectedLayout = 'de_CH';
	}
	this.layoutSwitch.val(selectedLayout);
	this.setLayout(selectedLayout);
}
Uhr.prototype.initThemeSwitch = function(defaultValue, overrideCookie) {
	var uhr = this;
	this.themeSwitch.on('change', function() {
		uhr.setTheme(this.value);
	});
	var selectedTheme = jQuery.cookie('theme' + this.id);
	if (selectedTheme == undefined || (overrideCookie && (defaultValue != undefined))) {
		selectedTheme = defaultValue;
	}
	if (selectedTheme == undefined || selectedTheme == 'undefined') {
		selectedTheme = 'black';
	}
	this.themeSwitch.val(selectedTheme);
	this.setTheme(selectedTheme);
}

/**
 * Hilfsklasse zum Rendern der Uhr.
 * @param layout     Layout-Objekt, das gerendert werden soll.
 * @param renderarea Das jQuery-gewrappte HTML-Element, auf dem gerendert werden soll.
 */
function UhrRenderer(layout, renderarea) {
	this.layout = layout;
	this.renderarea = renderarea;
}
UhrRenderer.prototype.render = function(uhr) {
	var renderer = this;
	this.renderarea.fadeOut('fast', function() {
		renderer.renderarea.empty();
		for (var y = 0; y < renderer.layout.values.length; y++) {
			for (var x = 0; x < renderer.layout.values[y].length; x++) {
				var letter = renderer.layout.values[y][x];
				renderer.renderarea.append(letter.toString());
			}
			if (y < renderer.layout.values.length - 1) {
				renderer.renderarea.append('<br/>');
			}
		}
		uhr.currentMinute = -1;
		uhr.update();
		renderer.renderarea.fadeIn('fast');
	});
}

/**
 * Ein Buchstabe. Hilfsklasse für den Renderer und Inhalt der Layout-Arrays.
 * @param value Der Buchstabe, der Dargestellt werden soll.
 * @param style Die CSS-Styleklassen des Buchstabens.
 */
function Letter(value, style) {
	this.value = value;
	this.style = style || '';
	this.getStyle = function() {
		return 'item letter ' + style;
	}
	this.getValue = function() {
		return value;
	}
}
Letter.prototype.toString = function letterToString() {
	return '<span class="' + this.getStyle() + '">' + this.getValue() + '</span>';
}
/**
 * Hilfsfunktion, um einen Buchstaben zu erzeugen.
 *
 * @param letter string: Der Buchstabe, der angezeigt werden soll
 * @example l('I', 'is') erzeugt den Buchstaben 'I' mit der CSS-Styleklasse 'is'
 */
function l(letter, style) {
	return new Letter(letter, style);
}
/**
 * Hilfsfunktion, um einen Buchstaben zu erzeugen, der zu einem Stunden-Wort gehört.
 *
 * @param letter   string:  Der Buchstabe, der angezeigt werden soll
 * @param hours... integer: Eine Aufzählung von Stundenwerten, zu welchen der Buchstabe als aktiv angezeigt werden soll
 * @example h('Z', 2), 11 erzeugt den Buchstaben 'Z', der um 2:xx, 11:xx, 14:xx und 23:xx aktiv angezeigt wird
 */
function h(letter) {
	var style = '';
	for (var i = 1; i < arguments.length; i++) {
		style += ' hour' + arguments[i];
	}
	return l(letter, style);
}
/**
 * Hilfsfunktion, um einen Buchstaben zu erzeugen, der zu einem Minuten-Wort gehört.
 *
 * @param letter     string:  Der Buchstabe, der angezeigt werden soll
 * @param minutes... integer: Eine Aufzählung von Minutenwerten, zu welchen der Buchstabe als aktiv angezeigt werden soll
 * @example m('A', 5, 10, 15, 20, 35) erzeugt den Buchstaben 'A' der um :05, :10, :15, :20 und :35 aktiv angezeigt wird
 */
function m(letter) {
	var style = '';
	for (var i = 1; i < arguments.length; i++) {
		style += ' minute' + arguments[i];
	}
	return l(letter, style);
}