archanox/RGBDS2CIL

using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;

namespace RGBDS2CIL
{
    public class RepeatLine : CodeLine, IAsmLine
    {
        public string Repeat;

        public string RepeatType { get; }
        public List<IAsmLine> Lines { get; set; } = new();

        public RepeatLine(CodeLine codeLine, string v) : base(codeLine.Code, codeLine, codeLine.Strings)
        {
            Repeat = codeLine.Code.Trim()[v.Length..].Trim();
            RepeatType = v.ToUpper();
        }

        public override IAsmLine Reparse()
        {
            for (var i = 1; i < 10; i++)
            {
                Repeat = Repeat.Replace($"\\{i}", $"args[{i - 1}]");
            }

            Repeat = CSharp.ReplaceDataTypesInString(Repeat.Replace("_NARG", "args.Length"));

            return base.Reparse();
        }

        public new void OutputLine(StringBuilder sb, int tabCount)
        {
            //TODO: support for loops
            //FOR n, 1, NUM_SPRITESTATEDATA_STRUCTS
            //FOR n, (NUM_TM_HM + 7) / 8

            //FOR V, start, stop, step    
            //V goes from start to stop by step

            //FOR V, start, stop
            //V increments from start to stop

            //FOR V, stop
            //V increments from 0 to stop

            sb.Append(new string('\t', tabCount)).Append("for (var ");
            if (RepeatType.ToUpper() == "FOR")
            {
                var parameters = Parser.GetParameters(Repeat);
                var variableName = parameters.First();
                
                sb.Append(variableName).Append(" = ");
                if (parameters.Count == 2)
                {
                    //n, (NUM_TM_HM + 7) / 8
                    //equal or less than?
                    sb.Append("0; ").Append(variableName).Append(" < ").Append(parameters.Last()).Append("; ").Append(variableName).Append("++)");
                }
                else if (parameters.Count == 3)
                {
                    //n, 1, NUM_TMS + 1
                    sb.Append(parameters[1]).Append("; ").Append(variableName).Append(" < ").Append(parameters.Last()).Append("; ").Append(variableName).Append("++)");
                }
                else //if (parameters.Count == 4)
                {
                    Debugger.Break();
                }
            }
            else
            {
                sb.Append($"i = 0; i < {Repeat}; i++)");
            }
            sb.AppendComment(Comment);
            sb.Append(new string('\t', tabCount)).AppendLine("{");

            foreach (var lineLine in Lines.Select(x => x.Reparse()))
            {
                lineLine.OutputLine(sb, tabCount + 1);
            }
        }
    }
}