/*
** Zabbix
** Copyright (C) 2001-2019 Zabbix SIA
**
** 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 2 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, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
**/


(function($) {
	var overlay,
		colorbox,
		input,
		defaults = {
			'palette': [
				['FF0000','FF0080','BF00FF','4000FF','0040FF','0080FF','00BFFF','00FFFF','00FFBF','00FF00','80FF00','BFFF00','FFFF00','FFBF00','FF8000','FF4000','CC6600','666699'],
				['000000','0F0F0F','1E1E1E','2D2D2D','3C3C3C','4B4B4B','5A5A5A','696969','787878','878787','969696','A5A5A5','B4B4B4','C3C3C3','D2D2D2','E1E1E1','F0F0F0','FFFFFF'],
				['FFEBEE','FCE4EC','F3E5F5','EDE7F6','E8EAF6','E3F2FD','E1F5FE','E0F7FA','E0F2F1','E8F5E9','F1F8E9','F9FBE7','FFFDE7','FFF8E1','FFF3E0','FBE9E7','EFEBE9','ECEFF1'],
				['FFCDD2','F8BBD0','E1BEE7','D1C4E9','C5CAE9','BBDEFB','B3E5FC','B2EBF2','B2DFDB','C8E6C9','DCEDC8','F0F4C3','FFF9C4','FFECB3','FFE0B2','FFCCBC','D7CCC8','CFD8DC'],
				['EF9A9A','F48FB1','CE93D8','B39DDB','9FA8DA','90CAF9','81D4FA','80DEEA','80CBC4','A5D6A7','C5E1A5','E6EE9C','FFF59D','FFE082','FFCC80','FFAB91','BCAAA4','B0BEC5'],
				['E57373','F06292','BA68C8','9575CD','7986CB','64B5F6','4FC3F7','4DD0E1','4DB6AC','81C784','AED581','DCE775','FFF176','FFD54F','FFB74D','FF8A65','A1887F','90A4AE'],
				['EF5350','EC407A','AB47BC','7E57C2','5C6BC0','42A5F5','29B6F6','26C6DA','26A69A','66BB6A','9CCC65','D4E157','FFEE58','FFCA28','FFA726','FF7043','8D6E63','78909C'],
				['F44336','E91E63','9C27B0','673AB7','3F51B5','2196F3','03A9F4','00BCD4','009688','4CAF50','8BC34A','CDDC39','FFEB3B','FFC107','FF9800','FF5722','795548','607D8B'],
				['E53935','D81B60','8E24AA','5E35B1','3949AB','1E88E5','039BE5','00ACC1','00897B','43A047','7CB342','C0CA33','FDD835','FFB300','FB8C00','F4511E','6D4C41','546E7A'],
				['D32F2F','C2185B','7B1FA2','512DA8','303F9F','1976D2','0288D1','0097A7','00796B','388E3C','689F38','AFB42B','FBC02D','FFA000','F57C00','E64A19','5D4037','455A64'],
				['C62828','AD1457','6A1B9A','4527A0','283593','1565C0','0277BD','00838F','00695C','2E7D32','558B2F','9E9D24','F9A825','FF8F00','EF6C00','D84315','4E342E','37474F'],
				['B71C1C','880E4F','4A148C','311B92','1A237E','0D47A1','01579B','006064','004D40','1B5E20','33691E','827717','F57F17','FF6F00','E65100','BF360C','3E2723','263238'],
				['891515','660A3B','370F69','24146D','131A5E','093578','044174','00484B','003930','144618','264E16','615911','B75F11','BF5300','AC3C00','8F2809','2E1D1A','1C252A'],
				['5B0E0E','440727','250A46','180D49','0D113F','062350','002B4D','003032','002620','0D2F10','19340F','413B0B','7A3F0B','7F3700','732800','5F1B06','1F1311','13191C'],
				['2D0707','220313','120523','0C0624','06081F','031128','001526','001819','00131D','061708','0C1A07','201D05','3D1F05','3F1B00','391400','2F0D03','0F0908','090C0E'],
			],
			'appendTo': 'body'
		},
		/**
		 * Click handler for every colorpicker cell.
		 */
		setColorHandler = function() {
			methods.set_color($(this).attr('title').substr(1));
			input.trigger('change');
			methods.hide();
		},
		/**
		 * Calculates top and left position for colorpicker overlay element.
		 */
		getOverlayPosition = function(id) {
			var colorbox = $('#lbl_' + id),
				pos = colorbox.offset(),
				dialog = colorbox.closest('.overlay-dialogue'),
				overlay = $('#color_picker'),
				min_outline = 10,
				frame_dims = {
					top: 0,
					left: 0,
					bottom: window.screen.height,
					right: window.screen.width
				},
				left = pos.left + colorbox.outerWidth(),
				top = pos.top;

			// If colorpicker is located in dialog, use dialog as a frame.
			if (overlay.parents('.overlay-dialogue').length) {
				frame_dims.left = dialog.offset().left;
				frame_dims.top = dialog.offset().top;
				frame_dims.bottom = dialog.outerHeight() + frame_dims.top;
				frame_dims.right = dialog.outerWidth() + frame_dims.left;
			}

			// Make sure that overlay is inside frame.
			if (top + overlay.outerHeight() + min_outline > frame_dims.bottom) {
				top = frame_dims.bottom - overlay.outerHeight() - min_outline;
			}

			if (left + overlay.outerWidth() + min_outline > frame_dims.right) {
				left = frame_dims.right - overlay.outerWidth() - min_outline;
			}

			return {
				top: top - frame_dims.top,
				left: left - frame_dims.left
			};
		},
		methods = {
			/**
			 * Initialization of colorpicker overlay.
			 *
			 * @param object         options
			 * @param array          options.palette   Array of arrays. Every nested array contains hex color for one
			 *                                         cell.
			 * @param string|object  options.appendTo  Target element where overlay should be appended.
			 * @param function       options.onUpdate  Callback function to execute once color has changed.
			 */
			init: function(options) {
				var close = $('<button type="button" class="overlay-close-btn" title="' + t('S_CLOSE') + '"/>')
					.click(methods.hide);
				options = $.extend(defaults, options || {});
				overlay = $('<div class="overlay-dialogue" id="color_picker"/>')
					.append(close)
					.append(
					$.map(options.palette, function(colors) {
						return $('<div class="color-picker"/>').append(
							$.map(colors, function(color) {
								return $('<div style="background: #%s" title="#%s"/>'.replace(/%s/g, color));
							})
						);
					})
					)
					.on('click', '.color-picker div', setColorHandler);

				overlay.appendTo($(options.appendTo));

				if ($(options.appendTo).prop('tagName') !== 'BODY') {
					$(options.appendTo).on('remove', function() {
						overlay.remove();
						overlay = null;
					});
				}

				methods.hide();
			},
			/**
			 * Hide colorpicker overlay.
			 */
			hide: function() {
				overlay.css({
					'zIndex': 1000,
					'display': 'none',
					'left': '-' + (overlay.width() ? overlay.width() : 100) + 'px'
				});
				colorbox = null;
				input = null;
			},
			/**
			 * Show colorpicker for specific element.
			 *
			 * @param string id       Id of input element which will be associated with opened colorpicker instance.
			 * @param object target   jQuery element (colorbox) which triggered show action.
			 */
			show: function(id, target) {
				input = $('#' + id);
				colorbox = $('#lbl_' + id);

				if (input.is(':disabled,[readonly]')) {
					return;
				}

				var pos = getOverlayPosition(id);

				overlay.css({
					'left': pos.left + 'px',
					'top': pos.top + 'px',
					'display': 'block'
				});

				addToOverlaysStack('color_picker', target, 'color_picker');
				overlayDialogueOnLoad(true, overlay);
			},
			/**
			 * Set color as background color value of colorbox and as value for input.
			 * Hides opened colorpicker overlay.
			 *
			 * @param string color    Desired hex color.
			 */
			set_color: function(color) {
				var color = $.trim(color).toUpperCase(),
					background = /[0-9A-F]{6}/.test(color) ? '#' + color : '';

				colorbox.css({
					'color': background,
					'background': background,
				})
				.attr('title', background);

				input.val(color);
			},
			/**
			 * Set desired color to input element and colorbox associated with input element.
			 *
			 * @param string id       Id of input element.
			 * @param string color    Hex color value.
			 */
			set_color_by_id: function(id, color) {
				colorbox = $('#lbl_' + id);
				input = $('#' + id);
				methods.set_color(color);
			}
		};

	$.colorpicker = function(method) {
		if (methods[method]) {
			if (!overlay) {
				methods.init();
			}

			return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
		}
		else if (typeof method === 'object' || !method) {
			return methods.init.apply(this, arguments);
		}
		else {
			$.error('Invalid method "' +  method + '".');
		}
	}

	$.fn.colorpicker = function(options) {
		/**
		 * Initialize colorpicker overlay if it is not initialized.
		 */
		if (!overlay) {
			methods.init(options);
		}

		return this.each(function(_, element) {
			var id = $(element).attr('id'),
				callback = (options && 'onUpdate' in options) ? options.onUpdate : null;
			if ($('#lbl_' + id).length) {
				// Prevent multiple initialization on same element.
				return;
			}

			$('<div/>').attr({
				'id': 'lbl_' + id,
				'title': element.value ? '#' + element.value : ''
			}).click(function(event) {
				/**
				 * Prefix 'lbl_' should be striped out of colorbox id attribute value to get id of associated
				 * input element.
				 */
				methods.show($(this).attr('id').substr(4), event);
			}).insertAfter(element);
			$(element).change(function() {
				/**
				 * Id attribute value of input element can be changed dynamically, for example when row with colorpicker
				 * is sorted in graph configuration form.
				 */
				methods.set_color_by_id($(element).attr('id'), this.value);
				callback && callback.call(element, this.value);
			});

			methods.set_color_by_id(id, element.value);
		});
	}
})(jQuery);
