/*

   Version: MPL 1.1/GPL 2.0/LGPL 2.1

   The contents of this file are subject to the Mozilla Public License Version

   1.1 (the "License"); you may not use this file except in compliance with

   the License. You may obtain a copy of the License at

   http://www.mozilla.org/MPL/

   Software distributed under the License is distributed on an "AS IS" basis,

   WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License

   for the specific language governing rights and limitations under the License.

   The Original Code is the Open Hardware Monitor code.

   The Initial Developer of the Original Code is 

   Michael Möller <m.moeller@gmx.ch>.

   Portions created by the Initial Developer are Copyright (C) 2009-2010

   the Initial Developer. All Rights Reserved.

   Contributor(s):

   Alternatively, the contents of this file may be used under the terms of

   either the GNU General Public License Version 2 or later (the "GPL"), or

   the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),

   in which case the provisions of the GPL or the LGPL are applicable instead

   of those above. If you wish to allow use of your version of this file only

   under the terms of either the GPL or the LGPL, and not to allow others to

   use your version of this file under the terms of the MPL, indicate your

   decision by deleting the provisions above and replace them with the notice

   and other provisions required by the GPL or the LGPL. If you do not delete

   the provisions above, a recipient may use your version of this file under

   the terms of any one of the MPL, the GPL or the LGPL.

 */

 using System;

 using System.Collections.Generic;

 using System.Configuration;

 using System.Drawing;

 using System.IO;

 using System.IO.Ports;

 using System.Text;

 namespace OpenHardwareMonitor.Hardware.TBalancer {

   public class TBalancer : IHardware {

     private string portName;

     private Image icon;

     private SerialPort serialPort;

     private byte protocolVersion;

     private Sensor[] digitalTemperatures = new Sensor[8];

     private Sensor[] analogTemperatures = new Sensor[4];

     private Sensor[] sensorhubTemperatures = new Sensor[6];

     private Sensor[] sensorhubFlows = new Sensor[2];

     private Sensor[] fans = new Sensor[4];

     private Sensor[] miniNGTemperatures = new Sensor[4];

     private Sensor[] miniNGFans = new Sensor[4];

     private List<ISensor> active = new List<ISensor>();

     private List<ISensor> deactivating = new List<ISensor>();

     private int[] primaryData = new int[0];

     private int[] alternativeData = new int[0];

     public const byte STARTFLAG = 100;

     public const byte ENDFLAG = 254;

     private delegate void MethodDelegate();

     private MethodDelegate alternativeRequest;    

     public TBalancer(string portName, byte protocolVersion) {

       this.portName = portName;

       this.icon = Utilities.EmbeddedResources.GetImage("bigng.png");

       this.protocolVersion = protocolVersion;

       int offset = 0;

       for (int i = 0; i < digitalTemperatures.Length; i++)

         digitalTemperatures[i] = new Sensor("Digital Sensor #" + (i + 1),

           offset + i, SensorType.Temperature, this);

       offset += digitalTemperatures.Length;

       for (int i = 0; i < analogTemperatures.Length; i++)

         analogTemperatures[i] = new Sensor("Analog Sensor #" + (i + 1),

           offset + i, SensorType.Temperature, this);

       offset += analogTemperatures.Length;

       for (int i = 0; i < sensorhubTemperatures.Length; i++)

         sensorhubTemperatures[i] = new Sensor("Sensorhub Sensor #" + (i + 1),

           offset + i, SensorType.Temperature, this);

       offset += sensorhubTemperatures.Length;

       for (int i = 0; i < sensorhubFlows.Length; i++)

         sensorhubFlows[i] = new Sensor("Flowmeter #" + (i + 1),

           offset + i, SensorType.Flow, this);

       offset += sensorhubFlows.Length;

       for (int i = 0; i < miniNGTemperatures.Length; i++)

         miniNGTemperatures[i] = new Sensor("miniNG #" + (i / 2 + 1) + 

           " Sensor #" + (i % 2 + 1), offset + i, SensorType.Temperature, this);

       offset += miniNGTemperatures.Length;

       alternativeRequest = new MethodDelegate(DelayedAlternativeRequest);

       try {

         serialPort = new SerialPort(portName, 19200, Parity.None, 8,

           StopBits.One);

         serialPort.Open();

         Update();

       } catch (IOException) { }      

     }

     private void ActivateSensor(Sensor sensor) {

       deactivating.Remove(sensor);

       if (!active.Contains(sensor)) {

         active.Add(sensor);

         if (SensorAdded != null)

           SensorAdded(sensor);

       }      

     }

     private void DeactivateSensor(Sensor sensor) {

       if (deactivating.Contains(sensor)) {

         active.Remove(sensor);

         deactivating.Remove(sensor);

         if (SensorRemoved != null)

           SensorRemoved(sensor);

       } else if (active.Contains(sensor)) {

         deactivating.Add(sensor);

       }     

     }

     private void ReadminiNG(int[] data, int number) {

       int offset = 1 + number * 65;

       if (data[offset + 61] != ENDFLAG)

         return;

       for (int i = 0; i < 2; i++) {

         Sensor sensor = miniNGTemperatures[number * 2 + i];

         if (data[offset + 7 + i] > 0) {

           sensor.Value = 0.5f * data[offset + 7 + i];

           ActivateSensor(sensor);

         } else {

           DeactivateSensor(sensor);

         }

       }

       for (int i = 0; i < 2; i++) {

         float maxRPM = 20.0f * data[offset + 44 + 2 * i];

         if (miniNGFans[number * 2 + i] == null)

           miniNGFans[number * 2 + i] = 

             new Sensor("miniNG #" + (number + 1) + " Fan #" + (i + 1),

             4 + number * 2 + i, maxRPM, SensorType.Fan, this);

         Sensor sensor = miniNGFans[number * 2 + i];

         sensor.Value = 20.0f * data[offset + 43 + 2 * i];

         ActivateSensor(sensor);

       }

     }

     private void ReadData() {

       int[] data = new int[285];

       for (int i = 0; i < data.Length; i++)

         data[i] = serialPort.ReadByte();

       if (data[0] != STARTFLAG) {

         serialPort.DiscardInBuffer();   

         return;

       }

       if (data[1] == 255) { // bigNG

         if (data[274] != protocolVersion) 

           return;

         this.primaryData = data;

         for (int i = 0; i < digitalTemperatures.Length; i++)

           if (data[238 + i] > 0) {

             digitalTemperatures[i].Value = 0.5f * data[238 + i];

             ActivateSensor(digitalTemperatures[i]);

           } else {

             DeactivateSensor(digitalTemperatures[i]);

           }

         for (int i = 0; i < analogTemperatures.Length; i++)

           if (data[260 + i] > 0) {

             analogTemperatures[i].Value = 0.5f * data[260 + i];

             ActivateSensor(analogTemperatures[i]);

           } else {

             DeactivateSensor(analogTemperatures[i]);

           }

         for (int i = 0; i < sensorhubTemperatures.Length; i++)

           if (data[246 + i] > 0) {

             sensorhubTemperatures[i].Value = 0.5f * data[246 + i];

             ActivateSensor(sensorhubTemperatures[i]);

           } else {

             DeactivateSensor(sensorhubTemperatures[i]);

           }

         for (int i = 0; i < sensorhubFlows.Length; i++)

           if (data[231 + i] > 0 && data[234] > 0) {

             float pulsesPerSecond = ((float)data[231 + i]) / data[234];

             const float pulsesPerLiter = 509;

             sensorhubFlows[i].Value = pulsesPerSecond * 3600 / pulsesPerLiter;

             ActivateSensor(sensorhubFlows[i]);

           } else {

             DeactivateSensor(sensorhubFlows[i]);

           }

         for (int i = 0; i < fans.Length; i++) {

           float maxRPM = 11.5f * ((data[149 + 2 * i] << 8) | data[148 + 2 * i]);

           if (fans[i] == null)

             fans[i] = new Sensor("Fan #" + (i + 1), i, maxRPM, SensorType.Fan,

               this);

           if ((data[136] & (1 << i)) == 0)

             fans[i].Value = maxRPM * 0.01f * data[156 + i]; // pwm mode

           else

             fans[i].Value = maxRPM * 0.01f * data[141 + i]; // analog mode

           ActivateSensor(fans[i]);

         }

       } else if (data[1] == 253) { // miniNG #1

         this.alternativeData = data;

         ReadminiNG(data, 0);        

         if (data[66] == 252)  // miniNG #2

           ReadminiNG(data, 1);

       } 

     }

     public Image Icon {

       get { return icon; }

     }

     public string Name {

       get { return "T-Balancer bigNG"; }

     }

     public string Identifier {

       get { return "/bigng/" + 

         this.portName.TrimStart(new char[]{'/'}).ToLower(); }

     }

     public ISensor[] Sensors {

       get { return active.ToArray(); }

     }

     public string GetReport() {

       StringBuilder r = new StringBuilder();

       r.AppendLine("T-Balancer bigNG");

       r.AppendLine();

       r.Append("Port Name: "); r.AppendLine(serialPort.PortName);

       r.AppendLine();

       r.AppendLine("Primary System Information Answer");

       r.AppendLine();

       r.AppendLine("       00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F");

       r.AppendLine();

       for (int i = 0; i <= 0x11; i++) {

         r.Append(" "); r.Append((i << 4).ToString("X3")); r.Append("  ");

         for (int j = 0; j <= 0xF; j++) {

           int index = ((i << 4) | j);

           if (index < primaryData.Length) {

             r.Append(" ");

             r.Append(primaryData[index].ToString("X2"));

           }          

         }

         r.AppendLine();

       }

       r.AppendLine();

       if (alternativeData.Length > 0) {

         r.AppendLine("Alternative System Information Answer");

         r.AppendLine();

         r.AppendLine("       00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F");

         r.AppendLine();

         for (int i = 0; i <= 0x11; i++) {

           r.Append(" "); r.Append((i << 4).ToString("X3")); r.Append("  ");

           for (int j = 0; j <= 0xF; j++) {

             int index = ((i << 4) | j);

             if (index < alternativeData.Length) {

               r.Append(" ");

               r.Append(alternativeData[index].ToString("X2"));

             }

           }

           r.AppendLine();

         }

         r.AppendLine();

       }

       return r.ToString();

     }

     private void DelayedAlternativeRequest() {

       System.Threading.Thread.Sleep(500);

       try {

         if (serialPort.IsOpen)

           serialPort.Write(new byte[] { 0x37 }, 0, 1);

       } catch (Exception) { }

     }

     public void Update() {

       while (serialPort.BytesToRead >= 285)

         ReadData();

       if (serialPort.BytesToRead == 1)

         serialPort.ReadByte();

       serialPort.Write(new byte[] { 0x38 }, 0, 1);

       alternativeRequest.BeginInvoke(null, null);

     }

     public void Close() {

       serialPort.Close();

     }

     public event SensorEventHandler SensorAdded;

     public event SensorEventHandler SensorRemoved;

   }

 }