using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Build.Utilities;
using System.Diagnostics;

namespace Cosmos.Build.MSBuild
{
    public abstract class BaseToolTask: Task
    {
        protected bool ExecuteTool(string workingDir, string filename, string arguments, string name)
        {
            var xProcessStartInfo = new ProcessStartInfo();
            xProcessStartInfo.WorkingDirectory = workingDir;
            xProcessStartInfo.FileName = filename;
            xProcessStartInfo.Arguments = arguments;
            xProcessStartInfo.UseShellExecute = false;
            xProcessStartInfo.RedirectStandardOutput = true;
            xProcessStartInfo.RedirectStandardError = true;
            xProcessStartInfo.CreateNoWindow = true;
            using (var xProcess = new Process())
            {
                xProcess.ErrorDataReceived += delegate(object sender, DataReceivedEventArgs e)
                {
                    mErrors.Add(e.Data);
                };
                xProcess.OutputDataReceived += delegate(object sender, DataReceivedEventArgs e)
                {
                    mOutput.Add(e.Data);
                };
                xProcess.StartInfo = xProcessStartInfo;
                mErrors = new List<string>();
                mOutput = new List<string>();
                xProcess.Start();
                xProcess.BeginErrorReadLine();
                xProcess.BeginOutputReadLine();
                xProcess.WaitForExit(15 * 60 * 1000); // wait 15 minutes
                if (xProcess.ExitCode != 0)
                {
                    if (!xProcess.HasExited)
                    {
                        xProcess.Kill();
                        Log.LogError("{0} timed out.", name);
                    }
                    else
                    {
                        Log.LogError("Error occurred while invoking {0}", name);
                    }
                    foreach (var xError in mErrors)
                    {
                        Log.LogError(xError);
                    }
                    return false;
                }
            }
            return true;
        }

        private List<string> mErrors;
        private List<string> mOutput;
    }
}