using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using Microsoft.Build.Utilities;
using Microsoft.Build.Framework;
using Cosmos.Debug.Common;

namespace Cosmos.Build.MSBuild {

  public class ReadNAsmMapToDebugInfo : AppDomainIsolatedTask {
    [Required]
    public string InputBaseDir { get; set; }

    [Required]
    public string DebugInfoFile { get; set; }

    public override bool Execute()
    {
      var xSW = new Stopwatch();
      xSW.Start();
      try
      {
        var xSourceInfos = ParseMapFile(InputBaseDir);
        if (xSourceInfos.Count == 0)
        {
          Log.LogError("No SourceInfos found!");
          return false;
        }
        using (var xDebugInfo = new DebugInfo(DebugInfoFile))
        {
          xDebugInfo.AddLabels(xSourceInfos);
        }
        return true;
      }
      catch (Exception ex)
      {
        Log.LogErrorFromException(ex, true, true, null);
        return false;
      }
      finally
      {
        xSW.Stop();
        Log.LogMessage(MessageImportance.High, "ReadNAsmMapToDebugInfo took {0}", xSW.Elapsed);
      }
    }

    private static List<Label> ParseMapFile(string inputBaseDir)
    {
      var xSourceStrings = File.ReadAllLines(Path.Combine(inputBaseDir, "main.map"));
      var xSource = new List<Label>();
      uint xIndex = 0;
      DebugInfo.mLastGuid = 0x4000000000000000;
      for (xIndex = 0; xIndex < xSourceStrings.Length; xIndex++)
      {
        if (xSourceStrings[xIndex].StartsWith("Real "))
        {
          // further check it:
          //Virtual   Name"))
          if (!xSourceStrings[xIndex].Substring(4).TrimStart().StartsWith("Virtual ")
              || !xSourceStrings[xIndex].EndsWith(" Name"))
          {
            continue;
          }
          xIndex++;
          break;
        }
      }
      for (; xIndex < xSourceStrings.Length; xIndex++)
      {
        string xLine = xSourceStrings[xIndex];
        var xLineParts = xLine.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);

        if (xLineParts.Length == 3)
        {
          uint xAddress = UInt32.Parse(xLineParts[0], NumberStyles.HexNumber);

          Guid xId;
          if (xLineParts[2].StartsWith("GUID_"))
          {
            xId = new Guid(xLineParts[2].Substring(5));
          }
          else
          {
            xId = DebugInfo.Guid_NewGuid();
          }
          xSource.Add(new Label()
          {
            ID=xId,
            Name = xLineParts[2],
            Address = xAddress
          });
        }
      }
      return xSource;
    }
  }

}