/*

   This Source Code Form is subject to the terms of the Mozilla Public

   License, v. 2.0. If a copy of the MPL was not distributed with this

   file, You can obtain one at http://mozilla.org/MPL/2.0/.

   Copyright (C) 2009-2012 Michael Möller <mmoeller@openhardwaremonitor.org>

 */

 using System;

 using System.Collections.Generic;

 using System.Drawing;

 using System.Text;

 using System.Diagnostics;

 using System.Windows.Forms;

 using System.Windows;

 using OpenHardwareMonitor.Hardware;

 using OpenHardwareMonitor.Utilities;

 using System.Runtime.InteropServices;

 using UacHelpers;

 namespace OpenHardwareMonitor.GUI

 {

     public class SoundGraphDisplay : IDisposable

     {

         private IComputer computer;

         private PersistentSettings settings;

         private UnitManager unitManager;

         private List<SensorFrontView> list = new List<SensorFrontView>();

         private SoundGraph.Server iServer;

         private int iNextSensorToDisplay=0;

         private int iTickCounter=0;

         public SoundGraphDisplay(IComputer computer, PersistentSettings settings,

           UnitManager unitManager)

         {

             this.computer = computer;

             this.settings = settings;

             this.unitManager = unitManager;

             computer.HardwareAdded += new HardwareEventHandler(HardwareAdded);

             computer.HardwareRemoved += new HardwareEventHandler(HardwareRemoved);

             //Start our client if needed

             Process[] processes = Process.GetProcessesByName("SoundGraphAccess");

             if (!(processes.Length > 0))

             {

               try

               {

                 //Try to launch the sound graph process from the same folder as this executable

                 string exeName = System.IO.Path.GetDirectoryName(Application.ExecutablePath);

                 exeName += @"\SoundGraphAccess.exe";

                 Process client = UserAccountControl.CreateProcessAsStandardUser(exeName, "");

               }

               catch (Exception e)

               {

                 Debug.WriteLine("SoundGraphAccess.exe start-up failed: " + e.ToString());

               }

             }

             //Start our SoundGraph server

             iServer = new SoundGraph.Server(@"\\.\pipe\sga-inbound", @"\\.\pipe\sga-outbound");

             iServer.Start();

         }

         private void HardwareRemoved(IHardware hardware)

         {

             hardware.SensorAdded -= new SensorEventHandler(SensorAdded);

             hardware.SensorRemoved -= new SensorEventHandler(SensorRemoved);

             foreach (ISensor sensor in hardware.Sensors)

                 SensorRemoved(sensor);

             foreach (IHardware subHardware in hardware.SubHardware)

                 HardwareRemoved(subHardware);

         }

         private void HardwareAdded(IHardware hardware)

         {

             foreach (ISensor sensor in hardware.Sensors)

                 SensorAdded(sensor);

             hardware.SensorAdded += new SensorEventHandler(SensorAdded);

             hardware.SensorRemoved += new SensorEventHandler(SensorRemoved);

             foreach (IHardware subHardware in hardware.SubHardware)

                 HardwareAdded(subHardware);

         }

         private void SensorAdded(ISensor sensor)

         {

             if (settings.GetValue(new Identifier(sensor.Identifier,

               "FrontView").ToString(), false))

                 Add(sensor, false);

         }

         private void SensorRemoved(ISensor sensor)

         {

             if (Contains(sensor))

                 Remove(sensor, false);

         }

         public void Dispose()

         {

             foreach (SensorFrontView icon in list)

                 icon.Dispose();

             Quit();

             iServer.Stop();

         }

         public void Redraw(bool aPacked, bool aDisplayTime)

         {

             const int KNumberOfTickBeforeSwitch = 4;

             const int KMaxCharacterPerLine = 16;

             string packedFirstLine=""; //We have 16 chars per line on our VFD

             string packedSecondLine="";

             int count = 0;

             string time = DateTime.Now.ToShortTimeString();

             //Update all sensors from our front view

             foreach (SensorFrontView sensor in list)

             {

                 count++;

                 sensor.Update();

                 if (aDisplayTime && count == 1)

                 {

                     //First slot is take by time display

                     count++;

                     packedFirstLine = time + " ";

                 }

                 if (aPacked)

                 {

                     //Build strings for packed mode

                     string packedText = "";

                     packedText = sensor.iFirstLine.Substring(0, 3) + ":" + sensor.iSecondLine;

                     if (count == 1)

                     {

                         packedFirstLine = packedText + " "; //Minimum one space to separate sensors on the same line

                     }

                     else if (count == 2)

                     {

                         //Add enough spaces to align to right hand side

                         while (packedFirstLine.Length + packedText.Length < KMaxCharacterPerLine)

                         {

                             packedFirstLine += " ";

                         }

                         packedFirstLine += packedText;

                     }

                     else if (count == 3)

                     {

                         packedSecondLine = packedText + " "; //Minimum one space to separate sensors on the same line

                     }

                     else if (count == 4)

                     {

                         //Add enough spaces to align to right hand side

                         while (packedSecondLine.Length + packedText.Length < KMaxCharacterPerLine)

                         {

                             packedSecondLine += " ";

                         }

                         packedSecondLine += packedText;

                     }

                 }

                 //SetText(sensor.iFirstLine, sensor.iSecondLine);

             }

             //Alternate between sensors 

             if (list.Count > 0)

             {

                 if (aPacked)

                 {

                     //string packedLine = "";

                     iTickCounter++;

                     if (iTickCounter == KNumberOfTickBeforeSwitch) //Move to the next sensor only every so many tick

                     {

                         iTickCounter = 0;

                         if (iNextSensorToDisplay==1)

                         {

                             iNextSensorToDisplay=0;

                         }

                         else

                         {

                             iNextSensorToDisplay=1;

                         }

                     }

                     //TODO: Do something like that to cycle lines if ever we want to

                     //SetText(time, (iNextSensorToDisplay == 1 && packedSecondLine.Length > 0 ? packedSecondLine : packedFirstLine));

                     //Display packed sensors on our FrontView display

                     SetText(packedFirstLine, packedSecondLine);

                 }

                 else

                 {

                     string secondLine = list[iNextSensorToDisplay].iSecondLine;

                     if (aDisplayTime)

                     {

                         //Add enough spaces

                         while (secondLine.Length + time.Length < KMaxCharacterPerLine)

                         {

                             secondLine += " ";

                         }

                         secondLine += time;

                     }

                     //Display current sensor on our FrontView display

                     SetText(list[iNextSensorToDisplay].iFirstLine, secondLine);

                     iTickCounter++;

                     if (iTickCounter == KNumberOfTickBeforeSwitch) //Move to the next sensor only every so many tick

                     {

                         iTickCounter = 0;

                         iNextSensorToDisplay++;

                     }

                 }

             }

             if (iNextSensorToDisplay == list.Count)

             {

                 //Go back to first sensor

                 iNextSensorToDisplay = 0;

             }

         }

         public bool Contains(ISensor sensor)

         {

             foreach (SensorFrontView icon in list)

                 if (icon.Sensor == sensor)

                     return true;

             return false;

         }

         public void Add(ISensor sensor, bool balloonTip)

         {

             if (Contains(sensor))

             {

                 return;

             }

             else

             {

                 //SL:

                 list.Add(new SensorFrontView(this, sensor, balloonTip, settings, unitManager));

                 //UpdateMainIconVisibilty();

                 settings.SetValue(new Identifier(sensor.Identifier, "FrontView").ToString(), true);

                 iNextSensorToDisplay = 0;

                 if (list.Count == 1)

                 {

                     //Just added first sensor in FrontView, unable FrontView plug-in mode

                     Init();

                 }

             }

         }

         public void Remove(ISensor sensor)

         {

             Remove(sensor, true);

             iNextSensorToDisplay = 0;

             if (list.Count == 0)

             {

                 //No sensor to display in FrontView, just disable FrontView plug-in mode

                 Uninit();

             }

         }

         private void Remove(ISensor sensor, bool deleteConfig)

         {

             if (deleteConfig)

             {

                 settings.Remove(

                   new Identifier(sensor.Identifier, "FrontView").ToString());

             }

             SensorFrontView instance = null;

             foreach (SensorFrontView icon in list)

                 if (icon.Sensor == sensor)

                     instance = icon;

             if (instance != null)

             {

                 list.Remove(instance);

                 //UpdateMainIconVisibilty();

                 instance.Dispose();

             }

         }

         private void UpdateMainIconVisibilty()

         {

             /*

             if (mainIconEnabled)

             {

                 mainIcon.Visible = list.Count == 0;

             }

             else

             {

                 mainIcon.Visible = false;

             }

              */

         }

         public void Init()

         {

             iServer.SendMessage("init:");

         }

         public void Uninit()

         {

             iServer.SendMessage("uninit:");

         }

         public void SetText(string aUpperLine, string aLowerLine)

         {

             iServer.SendMessage("set-vfd-text:" + aUpperLine + "\n" + aLowerLine);

         }

         public void Quit()

         {

             iServer.SendMessage("quit:");

         }

         /*

         public bool IsMainIconEnabled

         {

             get { return mainIconEnabled; }

             set

             {

                 if (mainIconEnabled != value)

                 {

                     mainIconEnabled = value;

                     UpdateMainIconVisibilty();

                 }

             }

         }*/

     }

 }