/**
 * @package         Regular Labs Library
 * @version         20.10.11720
 * 
 * @author          Peter van Westen <info@regularlabs.com>
 * @link            http://www.regularlabs.com
 * @copyright       Copyright © 2020 Regular Labs All Rights Reserved
 * @license         http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
 */

"use strict";

if (typeof window.RegularLabsCodeMirror === 'undefined'
	|| typeof RegularLabsCodeMirror.version === 'undefined'
	|| RegularLabsCodeMirror.version < '20.10.11720') {

	(function($) {
		window.RegularLabsCodeMirror = {
			version: '20.10.11720',

			init: function(id) {
				if (!$(`#rl_codemirror_${id} .CodeMirror`).length) {
					setTimeout(function() {
						RegularLabsCodeMirror.init(id);
					}, 100);
					return;
				}

				RegularLabsCodeMirror.resizeWidth(id);
				cmResize(Joomla.editors.instances[id], {
					minHeight      : 50,
					resizableWidth : false,        //Which direction the editor can be resized (default: both width and height).
					resizableHeight: true,
					cssClass       : 'cm-resize-handle' //CSS class to use on the *default* resize handle.
				});

				$(window).resize(function() {
					RegularLabsCodeMirror.resizeWidth(id);
				});
			},

			resizeWidth: function(id) {
				$(`#rl_codemirror_${id} .CodeMirror`).width(100).css('visibility', 'hidden');
				setTimeout(function() {
					$(`#rl_codemirror_${id} .CodeMirror`).each(function() {
						var new_width = $(this).parent().width();

						if (new_width <= 100) {
							setTimeout(function() {
								RegularLabsCodeMirror.resizeWidth(id);
							}, 100);
							return;
						}

						$(this).width(new_width).css('visibility', 'visible');
					});
				}, 100);
			}
		};
	})(jQuery);

	(function(global, factory) {
		typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
			typeof define === 'function' && define.amd ? define(factory) :
				(global.cmResize = factory());
	}(this, (function() {
		'use strict';

		function dragTracker(options) {

			var ep = Element.prototype;
			if (!ep.matches) ep.matches = ep.msMatchesSelector || ep.webkitMatchesSelector;
			if (!ep.closest) ep.closest = function(s) {
				var node = this;
				do {
					if (node.matches(s)) return node;
					node = node.tagName === 'svg' ? node.parentNode : node.parentElement;
				} while (node);

				return null;
			};

			options            = options || {};
			var container      = options.container || document.documentElement,
				selector       = options.selector,
				callback       = options.callback || console.log,
				callbackStart  = options.callbackDragStart,
				callbackEnd    = options.callbackDragEnd,

				callbackClick  = options.callbackClick,
				propagate      = options.propagateEvents,
				roundCoords    = options.roundCoords !== false,
				dragOutside    = options.dragOutside !== false,

				handleOffset   = options.handleOffset || options.handleOffset !== false;
			var offsetToCenter = null;
			switch (handleOffset) {
				case 'center':
					offsetToCenter = true;
					break;
				case 'topleft':
				case 'top-left':
					offsetToCenter = false;
					break;
			}

			var dragged     = void 0,
				mouseOffset = void 0,
				dragStart   = void 0;

			function getMousePos(e, elm, offset, stayWithin) {
				var x = e.clientX,
					y = e.clientY;

				function respectBounds(value, min, max) {
					return Math.max(min, Math.min(value, max));
				}

				if (elm) {
					var bounds = elm.getBoundingClientRect();
					x -= bounds.left;
					y -= bounds.top;

					if (offset) {
						x -= offset[0];
						y -= offset[1];
					}
					if (stayWithin) {
						x = respectBounds(x, 0, bounds.width);
						y = respectBounds(y, 0, bounds.height);
					}

					if (elm !== container) {
						var center = offsetToCenter !== null ? offsetToCenter
							: elm.nodeName === 'circle' || elm.nodeName === 'ellipse';

						if (center) {
							x -= bounds.width / 2;
							y -= bounds.height / 2;
						}
					}
				}
				return roundCoords ? [Math.round(x), Math.round(y)] : [x, y];
			}

			function stopEvent(e) {
				e.preventDefault();
				if (!propagate) {
					e.stopPropagation();
				}
			}

			function onDown(e) {
				if (selector) {
					dragged = selector instanceof Element ? selector.contains(e.target) ? selector : null : e.target.closest(selector);
				} else {
					dragged = {};
				}

				if (dragged) {
					stopEvent(e);

					mouseOffset = selector && handleOffset ? getMousePos(e, dragged) : [0, 0];
					dragStart   = getMousePos(e, container, mouseOffset);
					if (roundCoords) {
						dragStart = dragStart.map(Math.round);
					}

					if (callbackStart) {
						callbackStart(dragged, dragStart);
					}
				}
			}

			function onMove(e) {
				if (!dragged) {
					return;
				}
				stopEvent(e);

				var pos = getMousePos(e, container, mouseOffset, !dragOutside);
				callback(dragged, pos, dragStart);
			}

			function onEnd(e) {
				if (!dragged) {
					return;
				}

				if (callbackEnd || callbackClick) {
					var pos = getMousePos(e, container, mouseOffset, !dragOutside);

					if (callbackClick && dragStart[0] === pos[0] && dragStart[1] === pos[1]) {
						callbackClick(dragged, dragStart);
					}
					if (callbackEnd) {
						callbackEnd(dragged, pos, dragStart);
					}
				}
				dragged = null;
			}

			container.addEventListener('mousedown', function(e) {
				if (isLeftButton(e)) {
					onDown(e);
				}
			});
			container.addEventListener('touchstart', function(e) {
				relayTouch(e, onDown);
			});

			window.addEventListener('mousemove', function(e) {
				if (!dragged) {
					return;
				}

				if (isLeftButton(e)) {
					onMove(e);
				} else {
					onEnd(e);
				}
			});
			window.addEventListener('touchmove', function(e) {
				relayTouch(e, onMove);
			});

			window.addEventListener('mouseup', function(e) {
				if (dragged && !isLeftButton(e)) {
					onEnd(e);
				}
			});

			function onTouchEnd(e) {
				onEnd(tweakTouch(e));
			}

			container.addEventListener('touchend', onTouchEnd);
			container.addEventListener('touchcancel', onTouchEnd);

			function isLeftButton(e) {
				return e.buttons !== undefined ? e.buttons === 1 :
					e.which === 1;
			}

			function relayTouch(e, handler) {
				if (e.touches.length !== 1) {
					onEnd(e);
					return;
				}

				handler(tweakTouch(e));
			}

			function tweakTouch(e) {
				var touch = e.targetTouches[0];
				if (!touch) {
					touch = e.changedTouches[0];
				}

				touch.preventDefault  = e.preventDefault.bind(e);
				touch.stopPropagation = e.stopPropagation.bind(e);
				return touch;
			}
		}

		function cmResize(cm, config) {
			config = config || {};

			var minW    = config.minWidth || 200,
				minH    = config.minHeight || 100,
				resizeW = config.resizableWidth !== false,
				resizeH = config.resizableHeight !== false,
				css     = config.cssClass || 'cm-resize-handle';

			var cmElement = cm.display.wrapper,
				cmHandle  = config.handle || function() {
					var h       = cmElement.appendChild(document.createElement('div'));
					h.className = css;
					return h;
				}();

			var vScroll = cmElement.querySelector('.CodeMirror-vscrollbar'),
				hScroll = cmElement.querySelector('.CodeMirror-hscrollbar');

			function constrainScrollbars() {
				if (!config.handle) {
					vScroll.style.bottom = '18px';
					hScroll.style.right  = '18px';
				}
			}

			cm.on('update', constrainScrollbars);
			constrainScrollbars();

			var startPos  = void 0,
				startSize = void 0;
			dragTracker({
				container: cmHandle.offsetParent,
				selector : cmHandle,

				callbackDragStart: function callbackDragStart(handle, pos) {
					startPos  = pos;
					startSize = [cmElement.clientWidth, cmElement.clientHeight];
				},
				callback         : function callback(handle, pos) {
					var diffX = pos[0] - startPos[0],
						diffY = pos[1] - startPos[1],
						cw    = resizeW ? Math.max(minW, startSize[0] + diffX) : null,
						ch    = resizeH ? Math.max(minH, startSize[1] + diffY) : null;

					cm.setSize(cw, ch);
				}
			});

			return cmHandle;
		}

		return cmResize;

	})));
}