// (c) Copyright Ascensio System SIA 2010-2022
//
// This program is a free software product.
// You can redistribute it and/or modify it under the terms
// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
// any third-party rights.
//
// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE. For details, see
// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
//
// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
//
// The  interactive user interfaces in modified source and object code versions of the Program must
// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
//
// Pursuant to Section 7(b) of the License you must retain the original Product logo when
// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
// trademark law for use of our trademarks.
//
// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode

namespace Textile.States;

[FormatterState(SimpleBlockFormatterState.PatternBegin + @"bc" + SimpleBlockFormatterState.PatternEnd)]
public class PreCodeFormatterState : SimpleBlockFormatterState
{
    public PreCodeFormatterState(TextileFormatter formatter)
        : base(formatter)
    {
    }

    public override void Enter()
    {
        Formatter.Output.Write("<pre><code>");
    }

    public override void Exit()
    {
        Formatter.Output.WriteLine("</code></pre>");
    }

    public override void FormatLine(string input)
    {
        Formatter.Output.WriteLine(FixEntities(input));
    }

    public override bool ShouldExit(string input)
    {
        if (Regex.IsMatch(input, @"^\s*$"))
        {
            return true;
        }

        Formatter.Output.WriteLine("<br />");
        return false;
    }

    public override bool ShouldFormatBlocks(string input)
    {
        return false;
    }

    public override bool ShouldNestState(FormatterState other)
    {
        return false;
    }

    public override bool ShouldParseForNewFormatterState(string input)
    {
        return false;
    }

    private string FixEntities(string text)
    {
        // de-entify any remaining angle brackets or ampersands
        text = text.Replace("&", "&amp;");
        text = text.Replace(">", "&gt;");
        text = text.Replace("<", "&lt;");
        //Regex.Replace(text, @"\b&([#a-z0-9]+;)", "x%x%");
        return text;
    }
}