//using PleoStreamSimulatorEditor.Properties;
using PleoLab.Properties;
using System;
using System.Diagnostics;
using System.Drawing;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace PleoLab
{
    public partial class StartSimulationForm : Form
    {
        private string m_pathToSimulator = JD.Core.DataRoot.Value.Remove(JD.Core.DataRoot.Value.LastIndexOf("\\")) + "\\engine\\Tools\\PleoStreamSimulator\\PleoStreamSimulator.exe";

        private bool m_openReportAfterSimu = false;
        private Process m_simulator;
        private Stopwatch m_watch;
        private const string START_BUTTON_NAME = "Start Simulation";
        private const string CANCEL_BUTTON_NAME = "Cancel Simulation";

        public StartSimulationForm(Point _parentWindowPosition)
        {
            InitializeComponent();

            this.Location = new Point(_parentWindowPosition.X - Width / 2, _parentWindowPosition.Y - Height / 2);

            simuArgsTextBox.Text = "Simulation arguments line";
            m_openReportAfterSimu = openReportAfterSimuCheckBox.Checked;

            videoFormatComboBox.SelectedIndex = 0;
        }

        private void StartSimulationInfos_Load(object sender, EventArgs e)
        {
            textBoxMapsListPath.Text = Settings.Default.MapsFilePath;
            textBoxMapName.Text = Settings.Default.MapName;
            textBoxBandwidthSpeedMax.Text = Settings.Default.BandwidthMaxSpeed;
            textBoxBandwidthCurvesPath.Text = Settings.Default.BandwidthCurvesFilePath;
            textBoxSimulationReportFilePath.Text = Settings.Default.SimulationReportFilePath;
            nbOfBandwidthVariations.Value = Settings.Default.NbOfBandwidthVariations;
            openReportAfterSimuCheckBox.Checked = Settings.Default.OpenReportAfterSimu;
            videoFormatComboBox.SelectedIndex = Settings.Default.VideoFormat;
        }

        private void StartSimulation()
        {
            SaveArguments();
            startSimulationButton.Text = CANCEL_BUTTON_NAME;

            CommandArguments arguments = new CommandArguments();
            arguments.Set("MapListPath", textBoxMapsListPath.Text);
            arguments.Set("MapName", textBoxMapName.Text);
            arguments.Set("NetworkBandwidthSpeed", textBoxBandwidthSpeedMax.Text);
            arguments.Set("BandwidthCurvesFilePath", textBoxBandwidthCurvesPath.Text);
            arguments.Set("SimulationReportFilePath", textBoxSimulationReportFilePath.Text);
            arguments.Set("NbOfBandwidthVariation", nbOfBandwidthVariations.Value);
            arguments.Set("VideoFormat", videoFormatComboBox.SelectedIndex);

            simuArgsTextBox.Text = arguments.ToString();

            richTextBoxConsole.Text = "";

            m_simulator = new Process
            {
                StartInfo = new ProcessStartInfo
                {
                    FileName = m_pathToSimulator,
                    Arguments = arguments.ToString(),
                    UseShellExecute = false,
                    RedirectStandardOutput = true,
                    RedirectStandardError = true,
                    CreateNoWindow = true
                }
            };
            m_simulator.EnableRaisingEvents = true;
            m_simulator.Exited += new EventHandler((object s, System.EventArgs args) =>
            {
                if (IsHandleCreated)
                {
                    this.Invoke(new Action(() =>
                    {
                        m_watch.Stop();
                        startSimulationButton.Text = START_BUTTON_NAME;
                        MessageBox.Show(this, "Simulation ended.", "", MessageBoxButtons.OK);
                    }));

                    if (m_openReportAfterSimu)
                    {
                        this.Invoke(new Action(() => { OpenFileInTool(); }));
                        m_openReportAfterSimu = openReportAfterSimuCheckBox.Checked;
                    }
                }
            });
            try
            {
                m_watch = Stopwatch.StartNew();
                m_simulator.Start();
            }
            catch(Exception e)
            {
                MessageBoxButtons buttons = MessageBoxButtons.OK;
                DialogResult msgBoxResult = MessageBox.Show("An error occured when launching PleoStreamSimulator.exe :\n" + e.Message + "\n\nIs the path to the exe correct ? " + m_pathToSimulator + "\n", "Error !", buttons);
                m_simulator = null;
                m_watch.Stop();
                startSimulationButton.Text = START_BUTTON_NAME;
                return;
            }

            // Update simulation duration value
            Task.Factory.StartNew(() =>
            {
                while (m_watch.IsRunning)
                {
                    this.Invoke(new Action(() =>
                    {
                        TimeSpan ts = m_watch.Elapsed;
                        string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",
                            ts.Hours, ts.Minutes, ts.Seconds,
                            ts.Milliseconds / 10);
                        labelSimulationDuration.Text = "Simulation duration : " + elapsedTime;
                    }));
                }
            });

            // Reroute simulation standard output to this window's textbox widget
            Task.Factory.StartNew(() =>
            {
                while (!m_simulator.StandardOutput.EndOfStream)
                {
                    string line = m_simulator.StandardOutput.ReadLine();
                    this.Invoke(new Action(() => { richTextBoxConsole.AppendText("\n" + line); }));
                }
            });

            // Reroute simulation error output to this window's textbox widget
            Task.Factory.StartNew(() =>
            {
                while (!m_simulator.StandardError.EndOfStream)
                {
                    string line = m_simulator.StandardError.ReadLine();
                    this.Invoke(new Action(() => { richTextBoxConsole.AppendText("\n" + line); }));
                }
            });
        }

        private void CancelSimulation()
        {
            if (m_simulator != null && !m_simulator.HasExited)
            {
                MessageBoxButtons buttons = MessageBoxButtons.YesNo;
                DialogResult msgBoxResult = MessageBox.Show("Cancel the simulation ?", "Warning !", buttons);
                if (msgBoxResult == DialogResult.Yes)
                {
                    m_openReportAfterSimu = false;
                    m_simulator.Kill();
                }
            }
        }

        private void startSimulationButton_Click(object sender, EventArgs e)
        {
            if (startSimulationButton.Text == START_BUTTON_NAME)
            {
                StartSimulation();
            }
            else if (startSimulationButton.Text == CANCEL_BUTTON_NAME)
            {
                CancelSimulation();
            }
        }

        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            if (keyData == Keys.Escape)
            {
                this.Close();
                return true;
            }
            return base.ProcessCmdKey(ref msg, keyData);
        }

        private void StartSimulationInfos_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (m_simulator != null && !m_simulator.HasExited)
            {
                MessageBoxButtons buttons = MessageBoxButtons.YesNo;
                DialogResult msgBoxResult = MessageBox.Show("Closing this window will cancel the simulation. Are you sure you want to proceed ?", "Warning !", buttons);
                if (msgBoxResult == DialogResult.Yes)
                {
                    m_openReportAfterSimu = false;
                    m_simulator.Kill();
                }
                else if (msgBoxResult == DialogResult.No)
                {
                    e.Cancel = true;
                }
            }
            SaveArguments();
        }

        private void SaveArguments()
        {
            Settings.Default.MapsFilePath = textBoxMapsListPath.Text;
            Settings.Default.MapName = textBoxMapName.Text;
            Settings.Default.BandwidthMaxSpeed = textBoxBandwidthSpeedMax.Text;
            Settings.Default.BandwidthCurvesFilePath = textBoxBandwidthCurvesPath.Text;
            Settings.Default.SimulationReportFilePath = textBoxSimulationReportFilePath.Text;
            Settings.Default.NbOfBandwidthVariations = (uint)nbOfBandwidthVariations.Value;
            Settings.Default.OpenReportAfterSimu = openReportAfterSimuCheckBox.Checked;
            Settings.Default.VideoFormat = videoFormatComboBox.SelectedIndex;
            Settings.Default.Save();
        }

        private void OpenFileInTool()
        {
            try
            {
                PleoLabForm tool = this.Owner as PleoLabForm;
                tool.SimulationReadFile(textBoxSimulationReportFilePath.Text);
            }
            catch (Exception exc)
            {
                MessageBoxButtons buttons = MessageBoxButtons.OK;
                MessageBox.Show("Something went wrong :\n" + exc.Message, "Error while parsing the file", buttons);
            }
        }

        private void openReportAfterSimuCheckBox_CheckedChanged(object sender, EventArgs e)
        {
            m_openReportAfterSimu = openReportAfterSimuCheckBox.Checked;
        }
    }
}