using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.IO;

using CodeProject.Dialog;

using System.Drawing.Imaging;

using System.ServiceModel;

using System.Threading;

using System.Diagnostics;

//

using SharpDisplayInterface;

using SharpDisplayClient;

namespace SharpDisplayManager

{

    public partial class MainForm : Form

    {

        DateTime LastTickTime;

        Display iDisplay;

        System.Drawing.Bitmap iBmp;

        bool iCreateBitmap; //Workaround render to bitmap issues when minimized

        ServiceHost iServiceHost;

        /// <summary>

        /// Our collection of clients

        /// </summary>

        public Dictionary<string, ClientData> iClients;

        public bool iClosing;

        public MainForm()

        {

            LastTickTime = DateTime.Now;

            iDisplay = new Display();

            iClients = new Dictionary<string, ClientData>();

            InitializeComponent();

            UpdateStatus();

            //Load settings

            marqueeLabelTop.Font = Properties.Settings.Default.DisplayFont;

            marqueeLabelBottom.Font = Properties.Settings.Default.DisplayFont;

            checkBoxShowBorders.Checked = Properties.Settings.Default.DisplayShowBorders;

            checkBoxConnectOnStartup.Checked = Properties.Settings.Default.DisplayConnectOnStartup;

            checkBoxReverseScreen.Checked = Properties.Settings.Default.DisplayReverseScreen;

            //

            tableLayoutPanel.CellBorderStyle = (checkBoxShowBorders.Checked ? TableLayoutPanelCellBorderStyle.Single : TableLayoutPanelCellBorderStyle.None);

            //We have a bug when drawing minimized and reusing our bitmap

            iBmp = new System.Drawing.Bitmap(tableLayoutPanel.Width, tableLayoutPanel.Height, PixelFormat.Format32bppArgb);

            iCreateBitmap = false;

        }

        private void MainForm_Load(object sender, EventArgs e)

        {

            StartServer();

            //

            CheckFontHeight();

            //

            if (Properties.Settings.Default.DisplayConnectOnStartup)

            {

                iDisplay.Open();

                UpdateStatus();

            }

        }

        private void buttonFont_Click(object sender, EventArgs e)

        {

            //fontDialog.ShowColor = true;

            //fontDialog.ShowApply = true;

            fontDialog.ShowEffects = true;

            fontDialog.Font = marqueeLabelTop.Font;

            fontDialog.FixedPitchOnly = checkBoxFixedPitchFontOnly.Checked;

            //fontDialog.ShowHelp = true;

            //fontDlg.MaxSize = 40;

            //fontDlg.MinSize = 22;

            //fontDialog.Parent = this;

            //fontDialog.StartPosition = FormStartPosition.CenterParent;

            //DlgBox.ShowDialog(fontDialog);

            //if (fontDialog.ShowDialog(this) != DialogResult.Cancel)

            if (DlgBox.ShowDialog(fontDialog) != DialogResult.Cancel)

            {

                //MsgBox.Show("MessageBox MsgBox", "MsgBox caption");

                //MessageBox.Show("Ok");

                marqueeLabelTop.Font = fontDialog.Font;

                marqueeLabelBottom.Font = fontDialog.Font;

                Properties.Settings.Default.DisplayFont = fontDialog.Font;

                Properties.Settings.Default.Save();

                //

                CheckFontHeight();

            }

        }

        /// <summary>

        /// 

        /// </summary>

        void CheckFontHeight()

        {

            if (marqueeLabelBottom.Font.Height > marqueeLabelBottom.Height)

            {

                labelWarning.Text = "WARNING: Selected font is too height by " + (marqueeLabelBottom.Font.Height - marqueeLabelBottom.Height) + " pixels!";

                labelWarning.Visible = true;

            }

            else

            {

                labelWarning.Visible = false;

            }

        }

        private void buttonCapture_Click(object sender, EventArgs e)

        {

            System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(tableLayoutPanel.Width, tableLayoutPanel.Height);

            tableLayoutPanel.DrawToBitmap(bmp, tableLayoutPanel.ClientRectangle);

            //Bitmap bmpToSave = new Bitmap(bmp);

            bmp.Save("D:\\capture.png");

            marqueeLabelTop.Text = "Sweet";

            /*

            string outputFileName = "d:\\capture.png";

            using (MemoryStream memory = new MemoryStream())

            {

                using (FileStream fs = new FileStream(outputFileName, FileMode.OpenOrCreate, FileAccess.ReadWrite))

                {

                    bmp.Save(memory, System.Drawing.Imaging.ImageFormat.Png);

                    byte[] bytes = memory.ToArray();

                    fs.Write(bytes, 0, bytes.Length);

                }

            }

             */

        }

        private void CheckForRequestResults()

        {

            if (iDisplay.IsRequestPending())

            {

                switch (iDisplay.AttemptRequestCompletion())

                {

                    case Display.TMiniDisplayRequest.EMiniDisplayRequestPowerSupplyStatus:

                        if (iDisplay.PowerSupplyStatus())

                        {

                            toolStripStatusLabelPower.Text = "ON";

                        }

                        else

                        {

                            toolStripStatusLabelPower.Text = "OFF";

                        }

                        //Issue next request then

                        iDisplay.RequestDeviceId();

                        break;

                    case Display.TMiniDisplayRequest.EMiniDisplayRequestDeviceId:

                        toolStripStatusLabelConnect.Text += " - " + iDisplay.DeviceId();

                        //Issue next request then

                        iDisplay.RequestFirmwareRevision();

                        break;

                    case Display.TMiniDisplayRequest.EMiniDisplayRequestFirmwareRevision:

                        toolStripStatusLabelConnect.Text += " v" + iDisplay.FirmwareRevision();

                        //No more request to issue

                        break;

                }

            }

        }

        public delegate int CoordinateTranslationDelegate(System.Drawing.Bitmap aBmp, int aInt);

        public static int ScreenReversedX(System.Drawing.Bitmap aBmp, int aX)

        {

            return aBmp.Width - aX - 1;

        }

        public int ScreenReversedY(System.Drawing.Bitmap aBmp, int aY)

        {

            return iBmp.Height - aY - 1;

        }

        public int ScreenX(System.Drawing.Bitmap aBmp, int aX)

        {

            return aX;

        }

        public int ScreenY(System.Drawing.Bitmap aBmp, int aY)

        {

            return aY;

        }

        //This is our timer tick responsible to perform our render

        private void timer_Tick(object sender, EventArgs e)

        {

            //Update our animations

            DateTime NewTickTime = DateTime.Now;

            marqueeLabelTop.UpdateAnimation(LastTickTime, NewTickTime);

            marqueeLabelBottom.UpdateAnimation(LastTickTime, NewTickTime);

            //Update our display

            if (iDisplay.IsOpen())

            {

                CheckForRequestResults();

                //Draw to bitmap

                if (iCreateBitmap)

                {

                    iBmp = new System.Drawing.Bitmap(tableLayoutPanel.Width, tableLayoutPanel.Height, PixelFormat.Format32bppArgb);

                }

                tableLayoutPanel.DrawToBitmap(iBmp, tableLayoutPanel.ClientRectangle);

                //iBmp.Save("D:\\capture.png");

                //Select proper coordinate translation functions

                //We used delegate/function pointer to support reverse screen without doing an extra test on each pixels

                CoordinateTranslationDelegate screenX;

                CoordinateTranslationDelegate screenY;

                if (Properties.Settings.Default.DisplayReverseScreen)

                {

                    screenX = ScreenReversedX;

                    screenY = ScreenReversedY;

                }

                else

                {

                    screenX = ScreenX;

                    screenY = ScreenY;

                }

                //Send it to our display

                for (int i = 0; i < iBmp.Width; i++)

                {

                    for (int j = 0; j < iBmp.Height; j++)

                    {

                        unchecked

                        {

                            uint color = (uint)iBmp.GetPixel(i, j).ToArgb();

                            //For some reason when the app is minimized in the task bar only the alpha of our color is set.

                            //Thus that strange test for rendering to work both when the app is in the task bar and when it isn't.

                            iDisplay.SetPixel(screenX(iBmp, i), screenY(iBmp, j), Convert.ToInt32(!(color != 0xFF000000)));

                        }

                    }

                }

                iDisplay.SwapBuffers();

            }

            //Compute instant FPS

            toolStripStatusLabelFps.Text = (1.0/NewTickTime.Subtract(LastTickTime).TotalSeconds).ToString("F0") + " FPS";

            LastTickTime = NewTickTime;

        }

        private void buttonOpen_Click(object sender, EventArgs e)

        {

            if (iDisplay.Open())

            {

                UpdateStatus();

                iDisplay.RequestPowerSupplyStatus();

            }

            else

            {

                UpdateStatus();

                toolStripStatusLabelConnect.Text = "Connection error";

            }

        }

        private void buttonClose_Click(object sender, EventArgs e)

        {

            iDisplay.Close();

            UpdateStatus();

        }

        private void buttonClear_Click(object sender, EventArgs e)

        {

            iDisplay.Clear();

            iDisplay.SwapBuffers();

        }

        private void buttonFill_Click(object sender, EventArgs e)

        {

            iDisplay.Fill();

            iDisplay.SwapBuffers();

        }

        private void trackBarBrightness_Scroll(object sender, EventArgs e)

        {

            Properties.Settings.Default.DisplayBrightness = trackBarBrightness.Value;

            Properties.Settings.Default.Save();

            iDisplay.SetBrightness(trackBarBrightness.Value);

        }

        private void UpdateStatus()

        {

            if (iDisplay.IsOpen())

            {

                buttonFill.Enabled = true;

                buttonClear.Enabled = true;

                buttonOpen.Enabled = false;

                buttonClose.Enabled = true;

                trackBarBrightness.Enabled = true;

                trackBarBrightness.Minimum = iDisplay.MinBrightness();

                trackBarBrightness.Maximum = iDisplay.MaxBrightness();

                trackBarBrightness.Value = Properties.Settings.Default.DisplayBrightness;

                trackBarBrightness.LargeChange = Math.Max(1,(iDisplay.MaxBrightness() - iDisplay.MinBrightness())/5);

                trackBarBrightness.SmallChange = 1;

                iDisplay.SetBrightness(Properties.Settings.Default.DisplayBrightness);

                toolStripStatusLabelConnect.Text = "Connected - " + iDisplay.Vendor() + " - " + iDisplay.Product();

                //+ " - " + iDisplay.SerialNumber();

            }

            else

            {

                buttonFill.Enabled = false;

                buttonClear.Enabled = false;

                buttonOpen.Enabled = true;

                buttonClose.Enabled = false;

                trackBarBrightness.Enabled = false;

                toolStripStatusLabelConnect.Text = "Disconnected";

            }

        }

        private void checkBoxShowBorders_CheckedChanged(object sender, EventArgs e)

        {

            //Save our show borders setting

            tableLayoutPanel.CellBorderStyle = (checkBoxShowBorders.Checked ? TableLayoutPanelCellBorderStyle.Single : TableLayoutPanelCellBorderStyle.None);

            Properties.Settings.Default.DisplayShowBorders = checkBoxShowBorders.Checked;

            Properties.Settings.Default.Save();

        }

        private void checkBoxConnectOnStartup_CheckedChanged(object sender, EventArgs e)

        {

            //Save our connect on startup setting

            Properties.Settings.Default.DisplayConnectOnStartup = checkBoxConnectOnStartup.Checked;

            Properties.Settings.Default.Save();

        }

        private void checkBoxReverseScreen_CheckedChanged(object sender, EventArgs e)

        {

            //Save our reverse screen setting

            Properties.Settings.Default.DisplayReverseScreen = checkBoxReverseScreen.Checked;

            Properties.Settings.Default.Save();

        }

        private void MainForm_Resize(object sender, EventArgs e)

        {

            if (WindowState == FormWindowState.Minimized)

            {

                // Do some stuff

                //iBmp = new System.Drawing.Bitmap(tableLayoutPanel.Width, tableLayoutPanel.Height, PixelFormat.Format32bppArgb);

                iCreateBitmap = true;

            }

        }

        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)

        {

            StopServer();

            e.Cancel = iClosing;

        }

        public void StartServer()

        {

            iServiceHost = new ServiceHost

                (

                    typeof(DisplayServer),

                    new Uri[] { new Uri("net.tcp://localhost:8001/") }

                );

            iServiceHost.AddServiceEndpoint(typeof(IDisplayService), new NetTcpBinding(SecurityMode.None,true), "DisplayService");

            iServiceHost.Open();

        }

        public void StopServer()

        {

            if (iClients.Count > 0 && !iClosing)

            {

                //Tell our clients

                iClosing = true;

                BroadcastCloseEvent();

            }

            else if (iClosing)

            {

                if (MessageBox.Show("Force exit?", "Waiting for clients...", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes)

                {

                    iClosing = false; //We make sure we force close if asked twice

                }

            }

            else

            {

                //We removed that as it often lags for some reason

                //iServiceHost.Close();

            }

        }

        public void BroadcastCloseEvent()

        {

            Trace.TraceInformation("BroadcastCloseEvent - start");

            var inactiveClients = new List<string>();

            foreach (var client in iClients)

            {

                //if (client.Key != eventData.ClientName)

                {

                    try

                    {

                        Trace.TraceInformation("BroadcastCloseEvent - " + client.Key);

                        client.Value.Callback.OnCloseOrder(/*eventData*/);

                    }

                    catch (Exception ex)

                    {

                        inactiveClients.Add(client.Key);

                    }

                }

            }

            if (inactiveClients.Count > 0)

            {

                foreach (var client in inactiveClients)

                {

                    iClients.Remove(client);

                    Program.iMainForm.treeViewClients.Nodes.Remove(Program.iMainForm.treeViewClients.Nodes.Find(client, false)[0]);

                }

            }

        }

        private void buttonStartClient_Click(object sender, EventArgs e)

        {

            Thread clientThread = new Thread(SharpDisplayClient.Program.Main);

            clientThread.Start();

            BringToFront();

        }

        private void buttonSuspend_Click(object sender, EventArgs e)

        {

            timer.Enabled = !timer.Enabled;

            if (!timer.Enabled)

            {

                buttonSuspend.Text = "Suspend";

            }

            else

            {

                buttonSuspend.Text = "Pause";

            }

        }

        private void buttonCloseClients_Click(object sender, EventArgs e)

        {

            BroadcastCloseEvent();

        }

        private void treeViewClients_AfterSelect(object sender, TreeViewEventArgs e)

        {

        }

        //Delegates are used for our thread safe method

        public delegate void AddClientDelegate(string aSessionId, IDisplayServiceCallback aCallback);

        public delegate void RemoveClientDelegate(string aSessionId);

        public delegate void SetTextDelegate(string SessionId, int aLineIndex, string aText);

        public delegate void SetTextsDelegate(string SessionId, System.Collections.Generic.IList<string> aTexts);

        public delegate void SetClientNameDelegate(string aSessionId, string aName);

        /// <summary>

        ///

        /// </summary>

        /// <param name="aSessionId"></param>

        /// <param name="aCallback"></param>

        public void AddClientThreadSafe(string aSessionId, IDisplayServiceCallback aCallback)

        {

            if (this.InvokeRequired)

            {

                //Not in the proper thread, invoke ourselves

                AddClientDelegate d = new AddClientDelegate(AddClientThreadSafe);

                this.Invoke(d, new object[] { aSessionId, aCallback });

            }

            else

            {

                //We are in the proper thread

                //Add this session to our collection of clients

                ClientData newClient = new ClientData(aSessionId, aCallback);

                Program.iMainForm.iClients.Add(aSessionId, newClient);

                //Add this session to our UI

                UpdateClientTreeViewNode(newClient);

            }

        }

        /// <summary>

        ///

        /// </summary>

        /// <param name="aSessionId"></param>

        public void RemoveClientThreadSafe(string aSessionId)

        {

            if (this.InvokeRequired)

            {

                //Not in the proper thread, invoke ourselves

                RemoveClientDelegate d = new RemoveClientDelegate(RemoveClientThreadSafe);

                this.Invoke(d, new object[] { aSessionId });

            }

            else

            {

                //We are in the proper thread

                //Remove this session from both client collection and UI tree view

                if (Program.iMainForm.iClients.Keys.Contains(aSessionId))

                {

                    Program.iMainForm.iClients.Remove(aSessionId);

                    Program.iMainForm.treeViewClients.Nodes.Remove(Program.iMainForm.treeViewClients.Nodes.Find(aSessionId, false)[0]);

                }

                if (iClosing && iClients.Count == 0)

                {

                    //We were closing our form

                    //All clients are now closed

                    //Just resume our close operation

                    iClosing = false;

                    Close();

                }

            }

        }

        /// <summary>

        ///

        /// </summary>

        /// <param name="aLineIndex"></param>

        /// <param name="aText"></param>

        public void SetTextThreadSafe(string aSessionId, int aLineIndex, string aText)

        {

            if (this.InvokeRequired)

            {

                //Not in the proper thread, invoke ourselves

                SetTextDelegate d = new SetTextDelegate(SetTextThreadSafe);

                this.Invoke(d, new object[] { aSessionId, aLineIndex, aText });

            }

            else

            {

                ClientData client = iClients[aSessionId];

                if (client != null)

                {

                    //Make sure all our texts are in place

                    while (client.Texts.Count < (aLineIndex + 1))

                    {

                        client.Texts.Add("");

                    }

                    client.Texts[aLineIndex] = aText;

                    //We are in the proper thread

                    //Only support two lines for now

                    if (aLineIndex == 0)

                    {

                        marqueeLabelTop.Text = aText;

                    }

                    else if (aLineIndex == 1)

                    {

                        marqueeLabelBottom.Text = aText;

                    }

                    UpdateClientTreeViewNode(client);

                }

            }

        }

        /// <summary>

        ///

        /// </summary>

        /// <param name="aTexts"></param>

        public void SetTextsThreadSafe(string aSessionId, System.Collections.Generic.IList<string> aTexts)

        {

            if (this.InvokeRequired)

            {

                //Not in the proper thread, invoke ourselves

                SetTextsDelegate d = new SetTextsDelegate(SetTextsThreadSafe);

                this.Invoke(d, new object[] { aSessionId, aTexts });

            }

            else

            {

                ClientData client = iClients[aSessionId];

                if (client != null)

                {

                    //Populate our client with the given texts

                    int j = 0;

                    foreach (string text in aTexts)

                    {

                        if (client.Texts.Count < (j + 1))

                        {

                            client.Texts.Add(text);

                        }

                        else

                        {

                            client.Texts[j]=text;

                        }

                        j++;

                    }

                    //We are in the proper thread

                    //Only support two lines for now

                    for (int i = 0; i < aTexts.Count; i++)

                    {

                        if (i == 0)

                        {

                            marqueeLabelTop.Text = aTexts[i];

                        }

                        else if (i == 1)

                        {

                            marqueeLabelBottom.Text = aTexts[i];

                        }

                    }

                    UpdateClientTreeViewNode(client);

                }

            }

        }

        /// <summary>

        ///

        /// </summary>

        /// <param name="aSessionId"></param>

        /// <param name="aName"></param>

        public void SetClientNameThreadSafe(string aSessionId, string aName)

        {

            if (this.InvokeRequired)

            {

                //Not in the proper thread, invoke ourselves

                SetClientNameDelegate d = new SetClientNameDelegate(SetClientNameThreadSafe);

                this.Invoke(d, new object[] { aSessionId, aName });

            }

            else

            {

                //We are in the proper thread

                //Get our client

                ClientData client = iClients[aSessionId];

                if (client != null)

                {

                    //Set its name

                    client.Name = aName;

                    //Update our tree-view

                    UpdateClientTreeViewNode(client);

                }

            }

        }

        /// <summary>

        ///

        /// </summary>

        /// <param name="aClient"></param>

        private void UpdateClientTreeViewNode(ClientData aClient)

        {

            if (aClient == null)

            {

                return;

            }

            TreeNode node = null;

            //Check that our client node already exists

            //Get our client root node using its key which is our session ID

            TreeNode[] nodes = treeViewClients.Nodes.Find(aClient.SessionId, false);

            if (nodes.Count()>0)

            {

                //We already have a node for that client

                node = nodes[0];

                //Clear children as we are going to recreate them below

                node.Nodes.Clear();

            }

            else

            {

                //Client node does not exists create a new one

                treeViewClients.Nodes.Add(aClient.SessionId, aClient.SessionId);

                node = treeViewClients.Nodes.Find(aClient.SessionId, false)[0];

            }

            if (node != null)

            {

                //Change its name

                if (aClient.Name != "")

                {

                    //We have a name, us it as text for our root node

                    node.Text = aClient.Name;

                    //Add a child with SessionId

                    node.Nodes.Add(new TreeNode(aClient.SessionId));

                }

                else

                {

                    //No name, use session ID instead

                    node.Text = aClient.SessionId;

                }

                if (aClient.Texts.Count > 0)

                {

                    //Create root node for our texts

                    TreeNode textsRoot = new TreeNode("Text");

                    node.Nodes.Add(textsRoot);

                    //For each text add a new entry

                    foreach (string text in aClient.Texts)

                    {

                        textsRoot.Nodes.Add(new TreeNode(text));

                    }

                }

                node.ExpandAll();

            }

        }

    }

    /// <summary>

    /// A UI thread copy of a client relevant data.

    /// Keeping this copy in the UI thread helps us deal with threading issues.

    /// </summary>

    public class ClientData

    {

        public ClientData(string aSessionId, IDisplayServiceCallback aCallback)

        {

            SessionId = aSessionId;

            Name = "";

            Texts = new List<string>();

            Callback = aCallback;

        }

        public string SessionId { get; set; }

        public string Name { get; set; }

        public List<string> Texts { get; set; }

        public IDisplayServiceCallback Callback { get; set; }

    }

}