(function () {
  'use strict';

  /* globals jQuery */
  /*
   * 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 text2xml = S.text2xml,
        NS = S.NS;

    var $ = jQuery;
    var svgCanvas = svgEditor.canvas;
    var
    // {svgcontent} = S,
    // addElem = S.addSvgElementFromJson,
    svgdoc = S.svgroot.parentNode.ownerDocument;

    var properlySourceSizeTextArea = function properlySourceSizeTextArea() {
      // 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);
    }

    var selElems = void 0,
        started = void 0,
        newFO = void 0,
        editingforeign = false;

    /**
    * This function sets the content of element elt to the input XML.
    * @param {String} xmlString - The XML text.
    * @param elt - the parent element to append to
    * @returns {Boolean} 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 = 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.extIconsPath + 'foreignobject-icons.xml',
      buttons: [{
        id: 'tool_foreign',
        type: 'mode',
        title: 'Foreign Object Tool',
        events: {
          click: function click() {
            svgCanvas.setMode('foreign');
          }
        }
      }, {
        id: 'edit_foreign',
        type: 'context',
        panel: 'foreignObject_panel',
        title: 'Edit ForeignObject Content',
        events: {
          click: function click() {
            showForeignEditor();
          }
        }
      }],

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

        var endChanges = function endChanges() {
          $('#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
          /* const 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();
          });

          /* const cancel = */$('#tool_source_cancel').clone().hide().attr('id', 'foreign_cancel').unbind().appendTo('#tool_source_back').click(function () {
            endChanges();
          });
        }, 3000);
      },
      mouseDown: function mouseDown(opts) {
        // const 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 mouseUp(opts) {
        // const 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 selectedChanged(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 elementChanged(opts) {
        // const elem = opts.elems[0];
      }
    };
  });

}());