// move comments to their right location, inside new trs

function move_comments($anchorcomments) {

    $anchorcomments.each(function(i, anchorcomment) {

        var $anchorcomment = $(anchorcomment);

        var target_id = $anchorcomment.data('target-id');

        var $comment_div = _get_add_comment_div(target_id);

        var f_path = $anchorcomment.data('f_path');

        var line_no = $anchorcomment.data('line_no');

        if ($comment_div[0]) {

            $comment_div.append($anchorcomment.children());

            if (f_path && line_no) {

                _comment_div_append_add($comment_div, f_path, line_no);

            } else {

                _comment_div_append_form($comment_div, f_path, line_no);

            }

        } else {

            $anchorcomment.before("Comment to {0} line {1} which is outside the diff context:".format(f_path || '?', line_no || '?'));

        }

    });

    linkInlineComments($('.firstlink'), $('.comment:first-child'));

}

// comment bubble was clicked - insert new tr and show form

function show_comment_form($bubble) {

    var children = $bubble.closest('tr.line').children('[id]');

    var line_td_id = children[children.length - 1].id;

    var $comment_div = _get_add_comment_div(line_td_id);

    var f_path = $bubble.closest('[data-f_path]').data('f_path');

    var parts = line_td_id.split('_');

    var line_no = parts[parts.length-1];

    comment_div_state($comment_div, f_path, line_no, true);

}

// return comment div for target_id - add it if it doesn't exist yet

function _get_add_comment_div(target_id) {

    var comments_box_id = 'comments-' + target_id;

    var $comments_box = $('#' + comments_box_id);

    if (!$comments_box.length) {

        var html = '<tr><td id="{0}" colspan="3" class="inline-comments"></td></tr>'.format(comments_box_id);

        $('#' + target_id).closest('tr').after(html);

        $comments_box = $('#' + comments_box_id);

    }

    return $comments_box;

}

// Set $comment_div state - showing or not showing form and Add button.

// An Add button is shown on non-empty forms when no form is shown.

function comment_div_state($comment_div, f_path, line_no, show_form_opt) {

    var show_form = show_form_opt !== undefined ? show_form_opt : !f_path && !line_no;

    var $forms = $comment_div.children('.comment-inline-form');

    var $buttonrow = $comment_div.children('.add-button-row');

    var $comments = $comment_div.children('.comment');

    $forms.remove();

    $buttonrow.remove();

    if (show_form) {

        _comment_div_append_form($comment_div, f_path, line_no);

    } else if ($comments.length) {

        _comment_div_append_add($comment_div, f_path, line_no);

    }

}

// append an Add button to $comment_div and hook it up to show form

function _comment_div_append_add($comment_div, f_path, line_no) {

    var addlabel = TRANSLATION_MAP['Add Another Comment'];

    var $add = $('<div class="add-button-row"><span class="btn btn-default btn-xs add-button">{0}</span></div>'.format(addlabel));

    $comment_div.append($add);

    $add.children('.add-button').click(function(e) {

        comment_div_state($comment_div, f_path, line_no, true);

    });

}

// append a comment form to $comment_div

function _comment_div_append_form($comment_div, f_path, line_no) {

    var $form_div = $('#comment-inline-form-template').children()

        .clone()

        .addClass('comment-inline-form');

    $comment_div.append($form_div);

    var $form = $comment_div.find("form");

    var $textarea = $form.find('textarea');

    var $mentions_container = $form.find('div.mentions-container');

    $form.submit(function(e) {

        e.preventDefault();

        var text = $textarea.val();

        var review_status = $form.find('input:radio[name=changeset_status]:checked').val();

        var pr_close = $form.find('input:checkbox[name=save_close]:checked').length ? 'on' : '';

        var pr_delete = $form.find('input:checkbox[name=save_delete]:checked').length ? 'delete' : '';

        if (!text && !review_status && !pr_close && !pr_delete) {

            alert("Please provide a comment");

            return false;

        }

        if (pr_delete) {

            if (text || review_status || pr_close) {

                alert('Cannot delete pull request while making other changes');

                return false;

            }

            if (!confirm('Confirm to delete this pull request')) {

                return false;

            }

            var comments = $('.comment').size();

            if (comments > 0 &&

                !confirm('Confirm again to delete this pull request with {0} comments'.format(comments))) {

                return false;

            }

        }

        $form.find('.submitting-overlay').show();

        var postData = {

            'text': text,

            'f_path': f_path,

            'line': line_no,

            'changeset_status': review_status,

            'save_close': pr_close,

            'save_delete': pr_delete

        };

        var success = function(json_data) {

            if (pr_delete) {

                location = json_data['location'];

            } else {

                $comment_div.append(json_data['rendered_text']);

                comment_div_state($comment_div, f_path, line_no);

                linkInlineComments($('.firstlink'), $('.comment:first-child'));

                if ((review_status || pr_close) && !f_path && !line_no) {

                    // Page changed a lot - reload it after closing the submitted form

                    comment_div_state($comment_div, f_path, line_no, false);

                    location.reload(true);

                }

            }

        };

        ajaxPOST(AJAX_COMMENT_URL, postData, success);

    });

    $form.find('.hide-inline-form').click(function(e) {

        comment_div_state($comment_div, f_path, line_no);

    });

    tooltip_activate();

    if ($textarea.length > 0) {

        MentionsAutoComplete($textarea, $mentions_container, _USERS_AC_DATA);

    }

    if (f_path) {

        $textarea.focus();

    }

}

function deleteComment(comment_id) {

    var url = AJAX_COMMENT_DELETE_URL.replace('__COMMENT_ID__', comment_id);

    var postData = {};

    var success = function(o) {

        $('#comment-'+comment_id).remove();

        // Ignore that this might leave a stray Add button (or have a pending form with another comment) ...

    }

    ajaxPOST(url, postData, success);

}

/**

 * Double link comments

 */

var linkInlineComments = function($firstlinks, $comments){

    if ($comments.length > 0) {

        $firstlinks.html('<a href="#{0}">First comment</a>'.format($comments.prop('id')));

    }

    if ($comments.length <= 1) {

        return;

    }

    $comments.each(function(i, e){

            var prev = '';

            if (i > 0){

                var prev_anchor = $($comments.get(i-1)).prop('id');

                prev = '<a href="#{0}">Previous comment</a>'.format(prev_anchor);

            }

            var next = '';

            if (i+1 < $comments.length){

                var next_anchor = $($comments.get(i+1)).prop('id');

                next = '<a href="#{0}">Next comment</a>'.format(next_anchor);

            }

            $(this).find('.comment-prev-next-links').html(