using System;
using System.Text.RegularExpressions;


namespace Textile.States
{
    [FormatterState(@"^\s*(?<tag>table)" +
                   Globals.SpanPattern +
                   Globals.AlignPattern +
                   Globals.BlockModifiersPattern +
                   @"\.\s*$")]
    public class TableFormatterState : FormatterState
    {
        private string m_attsInfo;
        private string m_alignInfo;

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

        public override string Consume(string input, Match m)
        {
            m_alignInfo = m.Groups["align"].Value;
            m_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 Blocks.BlockAttributesParser.ParseBlockAttributes(m_alignInfo + m_attsInfo);
        }
    }
}