/* eslint-disable no-var */
/* globals svgEditor, svgedit, svgCanvas, $ */
/*
 * ext-foreignobject.js
 *
 * Licensed under the Apache License, Version 2
 *
 * Copyright(c) 2010 Jacques Distler
 * Copyright(c) 2010 Alexis Deveria
 *
 */

svgEditor.addExtension('foreignObject', function (S) {
	var NS = svgedit.NS,
		Utils = svgedit.utilities,
		// svgcontent = S.svgcontent,
		// addElem = S.addSvgElementFromJson,
		selElems,
		editingforeign = false,
		svgdoc = S.svgroot.parentNode.ownerDocument,
		started,
		newFO;

	var properlySourceSizeTextArea = function () {
		// TODO: remove magic numbers here and get values from CSS
		var height = $('#svg_source_container').height() - 80;
		$('#svg_source_textarea').css('height', height);
	};

	function showPanel (on) {
		var fcRules = $('#fc_rules');
		if (!fcRules.length) {
			fcRules = $('<style id="fc_rules"></style>').appendTo('head');
		}
		fcRules.text(!on ? '' : ' #tool_topath { display: none !important; }');
		$('#foreignObject_panel').toggle(on);
	}

	function toggleSourceButtons (on) {
		$('#tool_source_save, #tool_source_cancel').toggle(!on);
		$('#foreign_save, #foreign_cancel').toggle(on);
	}

	// Function: setForeignString(xmlString, elt)
	// This function sets the content of element elt to the input XML.
	//
	// Parameters:
	// xmlString - The XML text.
	// elt - the parent element to append to
	//
	// Returns:
	// This function returns false if the set was unsuccessful, true otherwise.
	function setForeignString (xmlString) {
		var elt = selElems[0];
		try {
			// convert string into XML document
			var newDoc = Utils.text2xml('<svg xmlns="' + NS.SVG + '" xmlns:xlink="' + NS.XLINK + '">' + xmlString + '</svg>');
			// run it through our sanitizer to remove anything we do not support
			S.sanitizeSvg(newDoc.documentElement);
			elt.parentNode.replaceChild(svgdoc.importNode(newDoc.documentElement.firstChild, true), elt);
			S.call('changed', [elt]);
			svgCanvas.clearSelection();
		} catch (e) {
			console.log(e);
			return false;
		}

		return true;
	}

	function showForeignEditor () {
		var elt = selElems[0];
		if (!elt || editingforeign) { return; }
		editingforeign = true;
		toggleSourceButtons(true);
		elt.removeAttribute('fill');

		var str = S.svgToString(elt, 0);
		$('#svg_source_textarea').val(str);
		$('#svg_source_editor').fadeIn();
		properlySourceSizeTextArea();
		$('#svg_source_textarea').focus();
	}

	function setAttr (attr, val) {
		svgCanvas.changeSelectedAttribute(attr, val);
		S.call('changed', selElems);
	}

	return {
		name: 'foreignObject',
		svgicons: svgEditor.curConfig.extPath + 'foreignobject-icons.xml',
		buttons: [{
			id: 'tool_foreign',
			type: 'mode',
			title: 'Foreign Object Tool',
			events: {
				'click': function () {
					svgCanvas.setMode('foreign');
				}
			}
		}, {
			id: 'edit_foreign',
			type: 'context',
			panel: 'foreignObject_panel',
			title: 'Edit ForeignObject Content',
			events: {
				'click': function () {
					showForeignEditor();
				}
			}
		}],

		context_tools: [{
			type: 'input',
			panel: 'foreignObject_panel',
			title: "Change foreignObject's width",
			id: 'foreign_width',
			label: 'w',
			size: 3,
			events: {
				change: function () {
					setAttr('width', this.value);
				}
			}
		}, {
			type: 'input',
			panel: 'foreignObject_panel',
			title: "Change foreignObject's height",
			id: 'foreign_height',
			label: 'h',
			events: {
				change: function () {
					setAttr('height', this.value);
				}
			}
		}, {
			type: 'input',
			panel: 'foreignObject_panel',
			title: "Change foreignObject's font size",
			id: 'foreign_font_size',
			label: 'font-size',
			size: 2,
			defval: 16,
			events: {
				change: function () {
					setAttr('font-size', this.value);
				}
			}
		}

		],
		callback: function () {
			$('#foreignObject_panel').hide();

			var endChanges = function () {
				$('#svg_source_editor').hide();
				editingforeign = false;
				$('#svg_source_textarea').blur();
				toggleSourceButtons(false);
			};

			// TODO: Needs to be done after orig icon loads
			setTimeout(function () {
				// Create source save/cancel buttons
				/* var save = */ $('#tool_source_save').clone()
					.hide().attr('id', 'foreign_save').unbind()
					.appendTo('#tool_source_back').click(function () {
						if (!editingforeign) { return; }

						if (!setForeignString($('#svg_source_textarea').val())) {
							$.confirm('Errors found. Revert to original?', function (ok) {
								if (!ok) { return false; }
								endChanges();
							});
						} else {
							endChanges();
						}
						// setSelectMode();
					});

				/* var cancel = */ $('#tool_source_cancel').clone()
					.hide().attr('id', 'foreign_cancel').unbind()
					.appendTo('#tool_source_back').click(function () {
						endChanges();
					});
			}, 3000);
		},
		mouseDown: function (opts) {
			// var e = opts.event;

			if (svgCanvas.getMode() === 'foreign') {
				started = true;
				newFO = S.addSvgElementFromJson({
					'element': 'foreignObject',
					'attr': {
						'x': opts.start_x,
						'y': opts.start_y,
						'id': S.getNextId(),
						'font-size': 16, // cur_text.font_size,
						'width': '48',
						'height': '20',
						'style': 'pointer-events:inherit'
					}
				});
				var m = svgdoc.createElementNS(NS.MATH, 'math');
				m.setAttributeNS(NS.XMLNS, 'xmlns', NS.MATH);
				m.setAttribute('display', 'inline');
				var mi = svgdoc.createElementNS(NS.MATH, 'mi');
				mi.setAttribute('mathvariant', 'normal');
				mi.textContent = '\u03A6';
				var mo = svgdoc.createElementNS(NS.MATH, 'mo');
				mo.textContent = '\u222A';
				var mi2 = svgdoc.createElementNS(NS.MATH, 'mi');
				mi2.textContent = '\u2133';
				m.appendChild(mi);
				m.appendChild(mo);
				m.appendChild(mi2);
				newFO.appendChild(m);
				return {
					started: true
				};
			}
		},
		mouseUp: function (opts) {
			// var e = opts.event;
			if (svgCanvas.getMode() === 'foreign' && started) {
				var attrs = $(newFO).attr(['width', 'height']);
				var keep = (attrs.width !== '0' || attrs.height !== '0');
				svgCanvas.addToSelection([newFO], true);

				return {
					keep: keep,
					element: newFO
				};
			}
		},
		selectedChanged: function (opts) {
			// Use this to update the current selected elements
			selElems = opts.elems;

			var i = selElems.length;

			while (i--) {
				var elem = selElems[i];
				if (elem && elem.tagName === 'foreignObject') {
					if (opts.selectedElement && !opts.multiselected) {
						$('#foreign_font_size').val(elem.getAttribute('font-size'));
						$('#foreign_width').val(elem.getAttribute('width'));
						$('#foreign_height').val(elem.getAttribute('height'));
						showPanel(true);
					} else {
						showPanel(false);
					}
				} else {
					showPanel(false);
				}
			}
		},
		elementChanged: function (opts) {
			// var elem = opts.elems[0];
		}
	};
});