/*
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: [],
		register: function(code, language) {
			for (var i = 0; i < this.languages.length; i++) {
				if (code == this.languages[i].code) {
					console.error('Error: Language code ' + code + ' cannot be registered for language "' + language.language + '" because it is already registered for language "' + this.languages[i].language + '"!');
					return false;
				}
			}
			language.code = code;
			this.languages.push(language);
		}
	};
	// 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({'styleClass': 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].styleClass,
			force: false,
			controls: true
		},
		start: function() {
			if (!this._isOn()) {
				var uhr = this;
				this._timer = window.setInterval(function() {
					uhr.options.time = new Date();
					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._currentMinute = -1;
			if (time == null) {
				this.options.time = new Date();
			} else {
				if (this._timer != null) {
					window.clearInterval(this._timer);
				}
				this.options.time = time;
			}
			this._update();
		},
		// private variables
		_id: -1,
		_timer: null,
		_currentMinute: -1,
		// private methods
		_isOn: function() {
			return this._timer !== null;
		},
		_update: function() {
			if (this._isOn()) {
				var time = this.options.time;
				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);
			dotMinute=0;
			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() {
			for (var i = 0; i < window._uhr.languages.length; i++) {
				var language = window._uhr.languages[i];
				if (language.code == this.options.language) {
					return language;
				}
			}
			// fallback: return empty object
			return {};
		},
		_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);
			}
			return date.getMinutes();
		},
		_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++;
			var userTime = this.options.time;
			if (this.options.time === undefined) {
				this.options.time = new Date();
			}
			this._setupHTML();
			this._wireFunctionality();
			if (userTime !== undefined) {
				this.time(userTime);
			}
		},
		_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
				if (window._uhr.languages.length > 1) {
					var languageChooser = $('<select id="uhr-languagechooser' + this._id + '"></select>');
					for (var i = 0; i < window._uhr.languages.length; i++) {
						var language = window._uhr.languages[i];
						languageChooser.append('<option value="' + language.code + '">' + language.language + '</option>');
					}
					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.styleClass + '">' + 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;
			}
			var found = false;
			for (var i = 0; i < window._uhr.languages.length; i++) {
				var code = window._uhr.languages[i].code;
				if (selectedLanguage == code) {
					found = true;
					break;
				}
			}
			if (!found) {
				var fallback;
				if (window._uhr.languages.length > 0) {
					fallback = window._uhr.languages[0].code;
				} else {
					fallback = '';
				}
				console.warn("Language " + selectedLanguage + " not found! Using fallback: " + fallback);
				selectedLanguage = fallback;
			}
			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;
			}
			found = false;
			for (var i = 0; i < window._uhr.themes.length; i++) {
				var styleClass = window._uhr.themes[i].styleClass;
				if (selectedTheme == styleClass) {
					found = true;
					break;
				}
			}
			if (!found) {
				var fallback = window._uhr.themes[0].styleClass;
				console.warn("Theme " + selectedTheme + " not found! Using fallback: " + fallback);
				selectedTheme = fallback;
			}
			themeChooser.val(selectedTheme);
			this.options.theme = "";
			this.theme(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, beforeshow) {
		var renderer = this;
		if (this.layout._parsed === undefined) {
			switch (this.layout.version) {
				case 2:
					var delegate = new _UhrRendererV2Delegate(this.layout);
					this.layout._parsed = delegate.parse();
					break;
				default:
					console.warn("Unknown layout version: '" + this.layout.version + "'");
					return;
			}
		}
		var letters = this.layout._parsed;
		this.renderarea.fadeOut('fast', function() {
			renderer.renderarea.empty();
			for (var y = 0; y < letters.length; y++) {
				for (var x = 0; x < letters[y].length; x++) {
					var letter = letters[y][x];
					renderer.renderarea.append(letter.toString());
				}
				if (y < letters.length - 1) {
					renderer.renderarea.append('<br/>');
				}
			}
			if (typeof beforeshow === 'function') {
				beforeshow();
			}
			renderer.renderarea.fadeIn('fast');
		});
	};
	function _UhrRendererV2Delegate(layout) {
		this.layout = layout;
		this._parseArrayOrObject = function(letters, styleClass, input) {
			if (Array.isArray(input)) {
				for (var i = 0; i < input.length; i++) {
					this._parseObject(letters, styleClass, input[i]);
				}
			} else {
				this._parseObject(letters, styleClass, input);
			}
		}
		this._parseObject = function(letters, styleClass, object) {
			for (var line in object) {
				if (object.hasOwnProperty(line)) {
					var highlightLetters = object[line];
					for (var i = 0; i < highlightLetters.length; i++) {
						var x = highlightLetters[i] - 1;
						letters[line - 1][x].addStyle(styleClass);
					}
				}
			}
		}
		this._parseTimeDefinition = function(letters, styleClass, definition) {
			for (var listString in definition) {
				if (definition.hasOwnProperty(listString)) {
					var array = listString.split(',');
					var highlightLetters = definition[listString];
					for (var index = 0; index < array.length; index++) {
						this._parseArrayOrObject(letters, styleClass + array[index], highlightLetters);
					}
				}
			}
		}
	}
	_UhrRendererV2Delegate.prototype.parse = function() {
		var letters = [];
		for (var i = 0; i < this.layout.letters.length; i++) {
			var line = [];
			var string = this.layout.letters[i];
			for (var c = 0; c < string.length; c++) {
				var character = new Letter(string[c]);
				line.push(character);
			}
			letters.push(line);
		}
		this._parseArrayOrObject(letters, 'on', this.layout.permanent);
		this._parseTimeDefinition(letters, 'minute', this.layout.minutes);
		this._parseTimeDefinition(letters, 'hour', this.layout.hours);
		return letters;
	};
	/**
	 * 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 ' + this.style;
		};
		this.getValue = function() {
			return value;
		}
		this.addStyle = function(style) {
			if (this.style == '') {
				this.style = style;
			} else {
				this.style += ' ' + style;
			}
		}
	}
	Letter.prototype.toString = function letterToString() {
		return '<span class="' + this.getStyle() + '">' + this.getValue() + '</span>';
	};
})(jQuery);