/*
 @licstart  The following is the entire license notice for the
 JavaScript code in this page.


 Copyright (C) 2013  neko259

 The JavaScript code in this page is free software: you can
 redistribute it and/or modify it under the terms of the GNU
 General Public License (GNU GPL) as published by the Free Software
 Foundation, either version 3 of the License, or (at your option)
 any later version.  The code is distributed WITHOUT ANY WARRANTY;
 without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the GNU GPL for more details.

 As additional permission under GNU GPL version 3 section 7, you
 may distribute non-source (e.g., minimized or compacted) forms of
 that code without the copy of the GNU GPL normally required by
 section 4, provided you include this license notice and a URL
 through which recipients can access the Corresponding Source.

 @licend  The above is the entire license notice
 for the JavaScript code in this page.
 */

var CLOSE_BUTTON = '#form-close-button';
var REPLY_TO_MSG = '.reply-to-message';
var REPLY_TO_MSG_ID = '#reply-to-message-id';

var $html = $("html, body");

function moveCaretToEnd(el) {
        if (typeof el.selectionStart == "number") {
            el.selectionStart = el.selectionEnd = el.value.length;
        } else if (typeof el.createTextRange != "undefined") {
            el.focus();
            var range = el.createTextRange();
            range.collapse(false);
            range.select();
        }
}

function getForm() {
    return $('.post-form-w');
}

function resetFormPosition() {
    var form = getForm();
    form.insertAfter($('.thread'));

    $(CLOSE_BUTTON).hide();
    $(REPLY_TO_MSG).hide();
}

function showFormAfter(blockToInsertAfter) {
    var form = getForm();
    form.insertAfter(blockToInsertAfter);

    $(CLOSE_BUTTON).show();
    form.show();
    $(REPLY_TO_MSG_ID).text(blockToInsertAfter.attr('id'));
    $(REPLY_TO_MSG).show();
}

function addQuickReply(postId) {
    // If we click "reply" on the same post, it means "cancel"
    if (getForm().prev().attr('id') == postId) {
        resetFormPosition();
    } else {
        var postLinkRaw = '[post]' + postId + '[/post]'

            var textToAdd = '';
        var blockToInsert = null;

        var textAreaJq = $('textarea');

        if (postId != null) {
            var post = $('#' + postId);

            // If this is not OP, add reflink to the post. If there already is
            // the same reflink, don't add it again.
            if (!post.is(':first-child') && textAreaJq.val().indexOf(postLinkRaw) < 0) {
                textToAdd += postLinkRaw + '\n';
            }

            blockToInsert = post;
        } else {
            blockToInsert = $('.thread');
        }

        var selection = window.getSelection().toString();
        if (selection.length > 0) {
            textToAdd += '[quote]' + selection + '[/quote]\n';
        }

        textAreaJq.val(textAreaJq.val()+ textToAdd);

        showFormAfter(blockToInsert);

        textAreaJq.focus();
        var textarea = document.getElementsByTagName('textarea')[0];
        moveCaretToEnd(textarea);
    }
}

function scrollToBottom() {
    $html.animate({scrollTop: $html.height()}, "fast");
}