using System;
using System.Diagnostics;
using System.IO;

namespace Packager.Tasks
{
    public abstract class ToolTask: Task, IDisposable
    {
        private Process _toolProcess;

        protected void LaunchTool(string toolPath, string args)
        {
            LogMessage(false, $"Launch {Path.GetFileName(toolPath)} {args}.");

            _toolProcess = new Process
            {
                StartInfo =
                    {
                        CreateNoWindow = true,
                        FileName = toolPath,
                        Arguments = args,
                        WorkingDirectory = Path.GetDirectoryName(toolPath),
                        UseShellExecute = false,
                        RedirectStandardOutput = true,
                        RedirectStandardError = true
                    },
                EnableRaisingEvents = true
            };


            _toolProcess.OutputDataReceived += OutputMessageReceived;
            _toolProcess.ErrorDataReceived += ErrorMessageReceived;
            //m_toolProcess.Exited += new EventHandler(ProcessExited);

            _toolProcess.Start();

            _toolProcess.BeginOutputReadLine();
            _toolProcess.BeginErrorReadLine();

            _toolProcess.WaitForExit();
            ProcessExited();
        }

        public void OutputMessageReceived(object sender, DataReceivedEventArgs e)
        {
            if(e.Data != null)
                LogMessage(false, e.Data);
        }

        public void ErrorMessageReceived(object sender, DataReceivedEventArgs e)
        {
            if(e.Data != null)
                LogMessage(true, e.Data);
        }

        public virtual void ProcessExited()
        {
            ErrorCode = _toolProcess.ExitCode;
        }

        public virtual void Dispose()
        {
            _toolProcess?.Dispose();
        }
    }
}