using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.VisualStudio;
using Microsoft.VisualStudio.Debugger.Interop;
using System.Diagnostics;
using System.Globalization;

namespace Cosmos.Debug.VSDebugEngine {
  public static class EngineUtils {
    public static string BuildCommandLine(string exe, string args) {
      string startQuote = "\"";
      string afterExe = "\"";

      if (exe.Length <= 0) {
        //throw new ComponentException(Constants.E_WIN32_INVALID_NAME);
      }

      if (exe[0] == '\"') {
        startQuote = string.Empty;
        if (exe.Length == 1) {
          //throw new ComponentException(Constants.E_WIN32_INVALID_NAME);
        }

        // If there are any more quotes, it needs to be the last character
        int endQuote = exe.IndexOf('\"', 1);
        if (endQuote > 0) {
          if (exe.Length == 2 || endQuote != exe.Length - 1) {
            //throw new ComponentException(Constants.E_WIN32_INVALID_NAME);
          }
          afterExe = string.Empty;
        }
      } else {
        // If it doesn't start with a quote, it shouldn't have any
        if (exe.IndexOf('\"') >= 0) {
          //throw new ComponentException(Constants.E_WIN32_INVALID_NAME);
        }
      }

      if (args == null) {
        args = "";
      } else if (args != String.Empty) {
        if (afterExe != String.Empty)
          afterExe = "\" ";
        else
          afterExe = " ";
      }

      return String.Concat(startQuote, exe, afterExe, args);
    }

    public static string GetAddressDescription()//DebuggedModule module, uint ip)
    {
      string location = ""; // ip.ToString("x8", CultureInfo.InvariantCulture);

      //if (module != null)
      {
        //  string moduleName = System.IO.Path.GetFileName(module.Name);
        //  location = string.Concat(moduleName, "!", location);
      }

      return location;
    }


    public static void CheckOk(int hr) {
      if (hr != 0) {
        //throw new ComponentException(hr);
      }
    }

    public static void RequireOk(int hr) {
      if (hr != 0) {
        throw new InvalidOperationException();
      }
    }

    public static int GetProcessId(IDebugProcess2 process) {
      AD_PROCESS_ID[] pid = new AD_PROCESS_ID[1];
      EngineUtils.RequireOk(process.GetPhysicalProcessId(pid));

      if (pid[0].ProcessIdType != (uint)enum_AD_PROCESS_ID.AD_PROCESS_ID_SYSTEM) {
        return 0;
      }

      return (int)pid[0].dwProcessId;
    }

    public static int GetProcessId(IDebugProgram2 program) {
      IDebugProcess2 process;
      RequireOk(program.GetProcess(out process));

      return GetProcessId(process);
    }

    public static int UnexpectedException(Exception e) {
      System.Diagnostics.Debug.Fail("Unexpected exception during Attach", e.ToString());
      return 0;// Constants.RPC_E_SERVERFAULT;
    }

    internal static bool IsFlagSet(uint value, int flagValue) {
      return (value & flagValue) != 0;
    }
  }
}