(function () {
  'use strict';

  /* globals jQuery */
  /*
   * ext-imagelib.js
   *
   * Licensed under the MIT License
   *
   * Copyright(c) 2010 Alexis Deveria
   *
   */

  svgEditor.addExtension('imagelib', function (_ref) {
    var decode64 = _ref.decode64;

    var $ = jQuery;
    var _svgEditor = svgEditor,
        uiStrings = _svgEditor.uiStrings,
        svgCanvas = _svgEditor.canvas;


    $.extend(uiStrings, {
      imagelib: {
        select_lib: 'Select an image library',
        show_list: 'Show library list',
        import_single: 'Import single',
        import_multi: 'Import multiple',
        open: 'Open as new document'
      }
    });

    var modularVersion = !('svgEditor' in window) || !window.svgEditor || window.svgEditor.modules !== false;

    var imgLibs = [{
      name: 'Demo library (local)',
      url: svgEditor.curConfig.extIconsPath + 'imagelib/index' + (modularVersion ? '-es' : '') + '.html',
      description: 'Demonstration library for SVG-edit on this server'
    }, {
      name: 'IAN Symbol Libraries',
      url: 'https://ian.umces.edu/symbols/catalog/svgedit/album_chooser.php',
      description: 'Free library of illustrations'
    }, {
      name: 'Openclipart',
      url: 'https://openclipart.org/svgedit',
      description: 'Share and Use Images. Over 50,000 Public Domain SVG Images and Growing.'
    }];

    function closeBrowser() {
      $('#imgbrowse_holder').hide();
    }

    function importImage(url) {
      var newImage = svgCanvas.addSvgElementFromJson({
        element: 'image',
        attr: {
          x: 0,
          y: 0,
          width: 0,
          height: 0,
          id: svgCanvas.getNextId(),
          style: 'pointer-events:inherit'
        }
      });
      svgCanvas.clearSelection();
      svgCanvas.addToSelection([newImage]);
      svgCanvas.setImageURL(url);
    }

    var pending = {};

    var mode = 's';
    var multiArr = [];
    var transferStopped = false;
    var preview = void 0,
        submit = void 0;

    window.addEventListener('message', function (evt) {
      // Receive `postMessage` data
      var response = evt.data;

      if (!response || typeof response !== 'string') {
        // Do nothing
        return;
      }
      try {
        // Todo: This block can be removed (and the above check changed to
        //   insist on an object) if embedAPI moves away from a string to
        //   an object (if IE9 support not needed)
        response = JSON.parse(response);
        if (response.namespace !== 'imagelib') {
          return;
        }
      } catch (e) {
        return;
      }

      var hasName = 'name' in response;
      var hasHref = 'href' in response;

      if (!hasName && transferStopped) {
        transferStopped = false;
        return;
      }

      var id = void 0;
      if (hasHref) {
        id = response.href;
        response = response.data;
      }

      // Hide possible transfer dialog box
      $('#dialog_box').hide();
      var entry = void 0,
          curMeta = void 0,
          svgStr = void 0,
          imgStr = void 0;
      var type = hasName ? 'meta' : response.charAt(0);
      switch (type) {
        case 'meta':
          {
            // Metadata
            transferStopped = false;
            curMeta = response;

            pending[curMeta.id] = curMeta;

            var name = curMeta.name || 'file';

            var message = uiStrings.notification.retrieving.replace('%s', name);

            if (mode !== 'm') {
              $.process_cancel(message, function () {
                transferStopped = true;
                // Should a message be sent back to the frame?

                $('#dialog_box').hide();
              });
            } else {
              entry = $('<div>' + message + '</div>').data('id', curMeta.id);
              preview.append(entry);
              curMeta.entry = entry;
            }

            return;
          }
        case '<':
          svgStr = true;
          break;
        case 'd':
          {
            if (response.startsWith('data:image/svg+xml')) {
              var pre = 'data:image/svg+xml;base64,';
              var src = response.substring(pre.length);
              response = decode64(src);
              svgStr = true;
              break;
            } else if (response.startsWith('data:image/')) {
              imgStr = true;
              break;
            }
          }
        // Else fall through
        default:
          // TODO: See if there's a way to base64 encode the binary data stream
          // const str = 'data:;base64,' + svgedit.utilities.encode64(response, true);

          // Assume it's raw image data
          // importImage(str);

          // Don't give warning as postMessage may have been used by something else
          if (mode !== 'm') {
            closeBrowser();
          } else {
            pending[id].entry.remove();
          }
          // $.alert('Unexpected data was returned: ' + response, function() {
          //   if (mode !== 'm') {
          //     closeBrowser();
          //   } else {
          //     pending[id].entry.remove();
          //   }
          // });
          return;
      }

      switch (mode) {
        case 's':
          // Import one
          if (svgStr) {
            svgCanvas.importSvgString(response);
          } else if (imgStr) {
            importImage(response);
          }
          closeBrowser();
          break;
        case 'm':
          // Import multiple
          multiArr.push([svgStr ? 'svg' : 'img', response]);
          curMeta = pending[id];
          var title = void 0;
          if (svgStr) {
            if (curMeta && curMeta.name) {
              title = curMeta.name;
            } else {
              // Try to find a title
              var xml = new DOMParser().parseFromString(response, 'text/xml').documentElement;
              title = $(xml).children('title').first().text() || '(SVG #' + response.length + ')';
            }
            if (curMeta) {
              preview.children().each(function () {
                if ($(this).data('id') === id) {
                  if (curMeta.preview_url) {
                    $(this).html('<img src="' + curMeta.preview_url + '">' + title);
                  } else {
                    $(this).text(title);
                  }
                  submit.removeAttr('disabled');
                }
              });
            } else {
              preview.append('<div>' + title + '</div>');
              submit.removeAttr('disabled');
            }
          } else {
            if (curMeta && curMeta.preview_url) {
              title = curMeta.name || '';
            }
            if (curMeta && curMeta.preview_url) {
              entry = '<img src="' + curMeta.preview_url + '">' + title;
            } else {
              entry = '<img src="' + response + '">';
            }

            if (curMeta) {
              preview.children().each(function () {
                if ($(this).data('id') === id) {
                  $(this).html(entry);
                  submit.removeAttr('disabled');
                }
              });
            } else {
              preview.append($('<div>').append(entry));
              submit.removeAttr('disabled');
            }
          }
          break;
        case 'o':
          // Open
          if (!svgStr) {
            break;
          }
          svgEditor.openPrep(function (ok) {
            if (!ok) {
              return;
            }
            svgCanvas.clear();
            svgCanvas.setSvgString(response);
            // updateCanvas();
          });
          closeBrowser();
          break;
      }
    }, true);

    function toggleMulti(show) {
      $('#lib_framewrap, #imglib_opts').css({ right: show ? 200 : 10 });
      if (!preview) {
        preview = $('<div id=imglib_preview>').css({
          position: 'absolute',
          top: 45,
          right: 10,
          width: 180,
          bottom: 45,
          background: '#fff',
          overflow: 'auto'
        }).insertAfter('#lib_framewrap');

        submit = $('<button disabled>Import selected</button>').appendTo('#imgbrowse').on('click touchend', function () {
          $.each(multiArr, function (i) {
            var type = this[0];
            var data = this[1];
            if (type === 'svg') {
              svgCanvas.importSvgString(data);
            } else {
              importImage(data);
            }
            svgCanvas.moveSelectedElements(i * 20, i * 20, false);
          });
          preview.empty();
          multiArr = [];
          $('#imgbrowse_holder').hide();
        }).css({
          position: 'absolute',
          bottom: 10,
          right: -10
        });
      }

      preview.toggle(show);
      submit.toggle(show);
    }

    function showBrowser() {
      var browser = $('#imgbrowse');
      if (!browser.length) {
        $('<div id=imgbrowse_holder><div id=imgbrowse class=toolbar_button>' + '</div></div>').insertAfter('#svg_docprops');
        browser = $('#imgbrowse');

        var allLibs = uiStrings.imagelib.select_lib;

        var libOpts = $('<ul id=imglib_opts>').appendTo(browser);
        var frame = $('<iframe/>').prependTo(browser).hide().wrap('<div id=lib_framewrap>');

        var header = $('<h1>').prependTo(browser).text(allLibs).css({
          position: 'absolute',
          top: 0,
          left: 0,
          width: '100%'
        });

        var cancel = $('<button>' + uiStrings.common.cancel + '</button>').appendTo(browser).on('click touchend', function () {
          $('#imgbrowse_holder').hide();
        }).css({
          position: 'absolute',
          top: 5,
          right: -10
        });

        var leftBlock = $('<span>').css({ position: 'absolute', top: 5, left: 10 }).appendTo(browser);

        var back = $('<button hidden>' + uiStrings.imagelib.show_list + '</button>').appendTo(leftBlock).on('click touchend', function () {
          frame.attr('src', 'about:blank').hide();
          libOpts.show();
          header.text(allLibs);
          back.hide();
        }).css({
          'margin-right': 5
        }).hide();

        /* const type = */$('<select><option value=s>' + uiStrings.imagelib.import_single + '</option><option value=m>' + uiStrings.imagelib.import_multi + '</option><option value=o>' + uiStrings.imagelib.open + '</option></select>').appendTo(leftBlock).change(function () {
          mode = $(this).val();
          switch (mode) {
            case 's':
            case 'o':
              toggleMulti(false);
              break;

            case 'm':
              // Import multiple
              toggleMulti(true);
              break;
          }
        }).css({
          'margin-top': 10
        });

        cancel.prepend($.getSvgIcon('cancel', true));
        back.prepend($.getSvgIcon('tool_imagelib', true));

        $.each(imgLibs, function (i, _ref2) {
          var name = _ref2.name,
              url = _ref2.url,
              description = _ref2.description;

          $('<li>').appendTo(libOpts).text(name).on('click touchend', function () {
            frame.attr('src', url).show();
            header.text(name);
            libOpts.hide();
            back.show();
          }).append('<span>' + description + '</span>');
        });
      } else {
        $('#imgbrowse_holder').show();
      }
    }

    return {
      svgicons: svgEditor.curConfig.extIconsPath + 'ext-imagelib.xml',
      buttons: [{
        id: 'tool_imagelib',
        type: 'app_menu', // _flyout
        position: 4,
        title: 'Image library',
        events: {
          mouseup: showBrowser
        }
      }],
      callback: function callback() {
        $('<style>').text('#imgbrowse_holder {' + 'position: absolute;' + 'top: 0;' + 'left: 0;' + 'width: 100%;' + 'height: 100%;' + 'background-color: rgba(0, 0, 0, .5);' + 'z-index: 5;' + '}' + '#imgbrowse {' + 'position: absolute;' + 'top: 25px;' + 'left: 25px;' + 'right: 25px;' + 'bottom: 25px;' + 'min-width: 300px;' + 'min-height: 200px;' + 'background: #B0B0B0;' + 'border: 1px outset #777;' + '}' + '#imgbrowse h1 {' + 'font-size: 20px;' + 'margin: .4em;' + 'text-align: center;' + '}' + '#lib_framewrap,' + '#imgbrowse > ul {' + 'position: absolute;' + 'top: 45px;' + 'left: 10px;' + 'right: 10px;' + 'bottom: 10px;' + 'background: white;' + 'margin: 0;' + 'padding: 0;' + '}' + '#imgbrowse > ul {' + 'overflow: auto;' + '}' + '#imgbrowse > div {' + 'border: 1px solid #666;' + '}' + '#imglib_preview > div {' + 'padding: 5px;' + 'font-size: 12px;' + '}' + '#imglib_preview img {' + 'display: block;' + 'margin: 0 auto;' + 'max-height: 100px;' + '}' + '#imgbrowse li {' + 'list-style: none;' + 'padding: .5em;' + 'background: #E8E8E8;' + 'border-bottom: 1px solid #B0B0B0;' + 'line-height: 1.2em;' + 'font-style: sans-serif;' + '}' + '#imgbrowse li > span {' + 'color: #666;' + 'font-size: 15px;' + 'display: block;' + '}' + '#imgbrowse li:hover {' + 'background: #FFC;' + 'cursor: pointer;' + '}' + '#imgbrowse iframe {' + 'width: 100%;' + 'height: 100%;' + 'border: 0;' + '}').appendTo('head');
      }
    };
  });

}());