define( [ "utils", "Markdown.Extra" ], function(utils) {
    
    var markdownExtra = {
        extensionId: "markdownExtra",
        extensionName: "Markdown Extra",
        optional: true,
        defaultConfig: {
			prettify: true
		},
        settingsBloc: [
                       	'<p>Adds extra features to the original Markdown syntax.</p>',
                       	'<div class="form-horizontal">',
	                       	'<div class="control-group">',
		                       	'<label class="control-label" for="input-markdownextra-prettify">Prettify syntax highlighting</label>',
		                       	'<div class="controls">',
	                       		'<input type="checkbox" id="input-markdownextra-prettify">',
	                       		'</div>',
                       		'</div>',
                   		'</div>'
                      ].join("")
    };
    
    markdownExtra.onLoadSettings = function() {
    	utils.setInputChecked("#input-markdownextra-prettify", markdownExtra.config.prettify);
    };
    
    markdownExtra.onSaveSettings = function(newConfig, event) {
    	newConfig.prettify = utils.getInputChecked("#input-markdownextra-prettify");
    };
    
    markdownExtra.onEditorConfigure = function(editor) {
    	var converter = editor.getConverter();
		var options = {};
		if(markdownExtra.config.prettify === true) {
			options.highlighter = "prettify";
			editor.hooks.chain("onPreviewRefresh", prettyPrint);
		}
    	Markdown.Extra.init(converter, options);
	};
	
    return markdownExtra;
});