/*
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/>.
*/
(function($) {
	"use strict";

	if (window._uhr !== undefined) {
		return;
	}

	window._uhr = {
		id: 0,
		languages: [],
		themes: []
	};
	// auto-detect themes
	var styleSheets = $('head link[rel=stylesheet]');
	for (var i = 0; i < styleSheets.length; i++) {
		var styleSheet = $(styleSheets[i]);
		var styleClass = styleSheet.attr('data-class');
		if (styleClass !== undefined) {
			var name = styleSheet.attr('data-name');
			if (name === undefined) {
				name = styleClass;
			}
			window._uhr.themes.push({'class': styleClass, 'name': name});
		}
	}
	// fall-back if no theme was included
	if (window._uhr.themes.length == 0) {
		window._uhr.themes.push({});
	}
	$.widget("fritteli.uhr", {
		options: {
			width: '100%',
			status: 'on',
			language: 'de_CH',
			theme: window._uhr.themes[0].class,
			force: false,
			controls: true
		},
		start: function() {
			if (!this._isOn()) {
				var uhr = this;
				this._timer = window.setInterval(function() {
					uhr._update();
				}, 1000);
				this._update();
				$.cookie('uhr-status' + this._id, 'on', {expires: 365, path: '/'});
			} else {
			}
		},
		stop: function() {
			if(this._isOn()) {
				window.clearInterval(this._timer);
				this._timer = null;
				this._update();
				$.cookie('uhr-status' + this._id, 'off', {expires: 365, path: '/'});
			}
		},
		toggle: function() {
			if(this._isOn()) {
				this.stop();
			} else {
				this.start();
			}
		},
		language: function(languageKey) {
			if (languageKey !== this.options.language) {
				this.options.language = languageKey;
				var renderer = new UhrRenderer(this._language(), this.element.find('.letterarea'));
				var uhr = this;
				renderer.render(this, function() {
					uhr._currentMinute = -1;
					uhr._update();
				});
				$.cookie('uhr-language' + this._id, languageKey, {expires: 365, path: '/'});
				this._update();
			}
		},
		theme: function(theme) {
			if (theme != this.options.theme) {
				this.element.removeClass(this.options.theme).addClass(theme);
				$('#uhr-onoffswitch' + this._id).removeClass(this.options.theme).addClass(theme);
				this.options.theme = theme;
				$.cookie('uhr-theme' + this._id, theme, {expires: 365, path: '/'});
			}
		},
		time: function(time) {
			this.options.time = time;
			if (time == null) {
				this._currentMinute = -1;
				this._update();
			} else {
				if (this._timer != null) {
					window.clearInterval(this._timer);
				}
				var renderer = new UhrRenderer(this._language(), this.element.find('.letterarea'));
				var uhr = this;
				renderer.render(this, function() {
					uhr._show(time);
				});

			}
		},
		// private variables
		_id: -1,
		_timer: null,
		_currentMinute: -1,
		// private methods
		_isOn: function() {
			return this._timer !== null;
		},
		_update: function() {
			if (this._isOn()) {
				var time = new Date();
				if (time.getMinutes() == this._currentMinute) {
					return;
				}
				this._currentMinute = time.getMinutes();
				this._show(time);
			} else {
				this._clear();
				this._currentMinute = -1;
			}
		},
		_show: function(time) {
			var dotMinute = this._getDotMinute(time);
			var hour = this._getHour(time);
			var coarseMinute = this._getCoarseMinute(time);
			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');
			}
		},
		_language: function() {
			return window._uhr.languages[this.options.language];
		},
		_highlight: function(itemClass) {
			this.element.find('.item.' + itemClass).addClass('active');
		},
		_clear: function() {
			this.element.find('.item').removeClass('active');
		},
		_getHour: function(date) {
			if (typeof this._language().getHour === 'function') {
				return this._language().getHour(date);
			}
			var hour = date.getHours();
			if (date.getMinutes() >= 25) {
				return hour + 1;
			}
			return hour;
		},
		_getCoarseMinute: function(date) {
			if (typeof this._language().getCoarseMinute === 'function') {
				return this._language().getCoarseMinute(date);
			}
			var minutes = date.getMinutes();
			return minutes - this._getDotMinute(date);
		},
		_getDotMinute: function(date) {
			if (typeof this._language().getDotMinute === 'function') {
				return this._language().getDotMinute(date);
			}
			var minutes = date.getMinutes();
			return minutes % 5;
		},
		_normalizeHour: function(hour) {
			if (hour > 12) {
				hour %= 12;
			}
			if (hour == 0) {
				return 12;
			}
			return hour;
		},
		_create: function() {
			this._id = window._uhr.id++;
			this._setupHTML();
			this._wireFunctionality();
			if (this.options.time !== undefined) {
				this.time(this.options.time);
			}
		},
		_setupHTML: function() {
			var e = this.element;
			// Base clock area
			e.addClass('uhr');
			e.empty();
			e.append('<span class="item dot dot1"></span>');
			e.append('<span class="item dot dot2"></span>');
			e.append('<span class="item dot dot3"></span>');
			e.append('<span class="item dot dot4"></span>');
			e.append('<div class="letterarea"></div>');
			e.append('<div class="reflection"></div>');
			e.css('width', this.options.width);
			var realWidth = e.width();
			e.width(realWidth);
			e.height(realWidth);
			e.css('font-size', (realWidth / 40) + 'px');

			if (this.options.controls) {
				// on/off switch
				var toggleSwitch = $('<div class="onoffswitch" id="uhr-onoffswitch' + this._id + '"></div>');
				toggleSwitch.append('<input type="checkbox" class="onoffswitch-checkbox" id="uhr-onoffswitch-checkbox' + this._id + '" checked="checked" />');
				toggleSwitch.append('<label class="onoffswitch-label" for="uhr-onoffswitch-checkbox' + this._id + '">'
					+ '<div class="onoffswitch-inner"></div>'
					+ '<div class="onoffswitch-switch"></div>'
					+ '</label>');
				e.after(toggleSwitch);

				// language chooser
				var options = [];
				for (var code in window._uhr.languages) {
					if (window._uhr.languages.hasOwnProperty(code)) {
						var language = window._uhr.languages[code];
						options.push('<option value="' + code + '">' + language.language + '</option>');
					}
				}
				if (options.length > 1) {
					var languageChooser = $('<select id="uhr-languagechooser' + this._id + '"></select>');
					for (var i = 0; i < options.length; i++) {
						languageChooser.append(options[i]);
					}
					e.after(languageChooser);
				}

				// theme chooser
				if (window._uhr.themes.length > 1) {
					var themeChooser = $('<select id="uhr-themechooser' + this._id + '"></select>');
					for (var i = 0; i < window._uhr.themes.length; i++) {
						var theme = window._uhr.themes[i];
						themeChooser.append('<option value="' + theme.class + '">' + theme.name + '</option>');
					}
					e.after(themeChooser);
				}
			}
		},
		_wireFunctionality: function() {
			var uhr = this;

			// on/off switch
			var toggleSwitch = $('#uhr-onoffswitch-checkbox' + this._id);
			toggleSwitch.on('click', function() {
				uhr.toggle();
			});
			var status = $.cookie('uhr-status' + this._id);
			if (status == undefined || this.options.force) {
				status = this.options.status;
			}
			toggleSwitch.prop('checked', status == 'on');
			if (status == 'on') {
				this.start();
			} else {
				this.stop();
			}

			// language chooser
			var languageChooser = $('#uhr-languagechooser' + this._id);
			languageChooser.on('change', function() {
				uhr.language(this.value);
			});
			var selectedLanguage = $.cookie('uhr-language' + this._id);
			if (selectedLanguage == undefined || this.options.force) {
				selectedLanguage = this.options.language;
			}
			languageChooser.val(selectedLanguage);
			this.options.language = "";
			this.language(selectedLanguage);

			// theme chooser
			var themeChooser = $('#uhr-themechooser' + this._id);
			themeChooser.on('change', function() {
				uhr.theme(this.value);
			});
			var selectedTheme = $.cookie('uhr-theme' + this._id);
			if (selectedTheme == undefined || this.options.force) {
				selectedTheme = this.options.theme;
			}
			var found = false;
			for (var i = 0; i < window._uhr.themes.length; i++) {
				var styleClass = window._uhr.themes[i].class;
				if (selectedTheme == styleClass) {
					found = true;
					break;
				}
			}
			if (!found) {
				var fallback = window._uhr.themes[0].class;
				console.warn("Theme " + selectedTheme + " not found! Using fallback: " + fallback);
				selectedTheme = fallback;
			}
			themeChooser.val(selectedTheme);
			this.options.theme = "";
			this.theme(selectedTheme);
		}
	});
})(jQuery);

/**
 * 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, beforeshow) {
	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/>');
			}
		}
		if (typeof beforeshow === 'function') {
			beforeshow();
		}
		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
 * @param style string: CSS-Klasse(n) als String
 * @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);
}