jq(document).ready(function() {


    /**************************************************************************
     * By default, hide the reply and the cancel button for the regular add
     * comment form.
     **************************************************************************/
    jq(".reply").find("input[name='form.buttons.reply']")
		        .css("display", "none");
    jq(".reply").find("input[name='form.buttons.cancel']")
	            .css("display", "none");


    /**************************************************************************
     * By default, show the reply button only when Javascript is enabled.
     * Otherwise hide it, since the reply functions only work with JS enabled.
     **************************************************************************/
    jq(".reply-to-comment-button").css("display" , "inline");


    /**************************************************************************
     * If the user has hit the reply button of a reply-to-comment form (form was 
     * submitted with a value for the "in_reply_to" field in the request), 
     * create a reply-to-comment form right under this comment.
     **************************************************************************/
    var post_comment_div = jq("#commenting");
    var in_reply_to_field = 
	    post_comment_div.find("input[name='form.widgets.in_reply_to']");
    if (in_reply_to_field.val() != "") {
        var current_reply_id = "#" + in_reply_to_field.val();
        var current_reply_to_div = jq(".discussion").find(current_reply_id);
        createReplyForm(current_reply_to_div);
        clearForm(post_comment_div);
    }


    /**************************************************************************
     * Create a reply-to-comment form right beneath the form that is passed to
     * the function. We do this by copying the regular comment form and 
     * adding a hidden in_reply_to field to the form.
     **************************************************************************/
    function createReplyForm(comment_div){

        var comment_id = comment_div.attr("id");

        var reply_button = comment_div.find(".reply-to-comment-button");

        /* Clone the reply div at the end of the page template that contains
         * the regular comment form.
         */
        var reply_div = jq("#commenting").clone(true);

        /* Remove the ReCaptcha JS code before appending the form. If not
         * removed, this causes problems
         */
        reply_div.find("#formfield-form-widgets-captcha")
		         .find("script")
				 .remove();

        /* Insert the cloned comment form right after the reply button of the
         * current comment.
         */
        reply_div.appendTo(comment_div).css("display", "none");

        /* Remove id="reply" attribute, since we use it to uniquely
           the main reply form. */
        reply_div.removeAttr("id")

        /* Hide the reply button (only hide, because we may want to show it
         * again if the user hits the cancel button).
         */
        jq(reply_button).css("display", "none");

        /* Fetch the reply form inside the reply div */
        var reply_form = reply_div.find("form");

        /* Populate the hidden 'in_reply_to' field with the correct comment id */
        reply_form.find("input[name='form.widgets.in_reply_to']")
		          .val(comment_id);

        /* Add a remove-reply-to-comment Javascript function to remove the form */
        var cancel_reply_button = reply_div.find(".cancelreplytocomment");
        cancel_reply_button.attr("id", comment_id);

        /* Show the cancel buttons. */
        reply_form.find("input[name='form.buttons.cancel']")
		          .css("display", "inline");

        /* Show the reply layer with a slide down effect */
        reply_div.slideDown("slow");

        /* Show the cancel button in the reply-to-comment form */
        cancel_reply_button.css("display", "inline");
    }

    
	/**************************************************************************
     * Remove all error messages and field values from the form that is passed
     * to the function.
     **************************************************************************/
    function clearForm(form_div) {
        form_div.find(".error").removeClass("error");
        form_div.find(".fieldErrorBox").remove();
        form_div.find("input[type='text']").attr("value", "");
        form_div.find("textarea").attr("value", "");
        /* XXX: Clean all additional form extender fields. */
    }
	
    
	/**************************************************************************
     * If the user hits the "reply" button of an existing comment, create a 
     * reply form right beneath this comment.
     **************************************************************************/
    jq(".reply-to-comment-button").bind("click", function(e){
        var comment_div = jq(this).parents().filter(".comment");
        createReplyForm(comment_div);
        clearForm(comment_div);
    });


    /**************************************************************************
     * If the user hits the "clear" button of an open reply-to-comment form,
     * remove the form and show the "reply" button again.
     **************************************************************************/
    jq("#form-buttons-cancel").bind("click", function(e){
        e.preventDefault();
        reply_to_comment_button = jq(this).
		                              parents().
								      filter(".comment").
									  find(".reply-to-comment-button");

        /* Find the reply-to-comment form and hide and remove it again. */
        reply_to_comment_form = jq(this).parents().filter(".reply")
        reply_to_comment_form.slideUp("slow", function() { jq(this).remove(); } );

        /* Show the reply-to-comment button again. */
        reply_to_comment_button.css("display", "inline");

    });

 });