// (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(@"^\s*(?<tag>table)" +
                Globals.SpanPattern +
                Globals.AlignPattern +
                Globals.BlockModifiersPattern +
                @"\.\s*$")]
public class TableFormatterState : FormatterState
{
    private string _attsInfo;
    private string _alignInfo;

    public TableFormatterState(TextileFormatter f)
        : base(f)
    {
    }

    public override string Consume(string input, Match m)
    {
        _alignInfo = m.Groups["align"].Value;
        _attsInfo = m.Groups["atts"].Value;

        //TODO: check the state (it could already be a table!)
        this.Formatter.ChangeState(this);

        return string.Empty;
    }

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

    public override void Enter()
    {
        Formatter.Output.WriteLine("<table" + FormattedStylesAndAlignment() + ">");
    }

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

    public override void FormatLine(string input)
    {
        if (input.Length > 0)
        {
            throw new Exception("The TableFormatter state is not supposed to format any lines!");
        }
    }

    public override bool ShouldExit(string input)
    {
        var m = Regex.Match(input,
                                @"^\s*" + Globals.AlignPattern + Globals.BlockModifiersPattern +
                                @"(\.\s?)?(?<tag>\|)" +
                                @"(?<content>.*)(?=\|)"
                                );
        return !m.Success;
    }

    protected string FormattedStylesAndAlignment()
    {
        return BlockAttributesParser.ParseBlockAttributes(_alignInfo + _attsInfo);
    }
}