/*

  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) 2009-2011

  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.Globalization;

namespace OpenHardwareMonitor.Hardware.ATI {

  internal sealed class ATIGPU : Hardware {

    private readonly int adapterIndex;

    private readonly int busNumber;

    private readonly int deviceNumber;

    private readonly Sensor temperature;

    private readonly Sensor fan;

    private readonly Sensor coreClock;

    private readonly Sensor memoryClock;

    private readonly Sensor coreVoltage;

    private readonly Sensor coreLoad;

    private readonly Sensor controlSensor;

    private readonly Control fanControl;

    private bool restoreDefaultFanSpeedRequired = false;

    private ADLFanSpeedValue initialFanSpeedValue;    

    public ATIGPU(string name, int adapterIndex, int busNumber, 

      int deviceNumber, ISettings settings) 

      : base(name, new Identifier("atigpu", 

        adapterIndex.ToString(CultureInfo.InvariantCulture)), settings)

    {

      this.adapterIndex = adapterIndex;

      this.busNumber = busNumber;

      this.deviceNumber = deviceNumber;

      this.temperature = new Sensor("GPU Core", 0, SensorType.Temperature, this, settings);

      this.fan = new Sensor("GPU Fan", 0, SensorType.Fan, this, settings);

      this.coreClock = new Sensor("GPU Core", 0, SensorType.Clock, this, settings);

      this.memoryClock = new Sensor("GPU Memory", 1, SensorType.Clock, this, settings);

      this.coreVoltage = new Sensor("GPU Core", 0, SensorType.Voltage, this, settings);

      this.coreLoad = new Sensor("GPU Core", 0, SensorType.Load, this, settings);

      this.controlSensor = new Sensor("GPU Fan", 0, SensorType.Control, this, settings);

      ADLFanSpeedInfo afsi = new ADLFanSpeedInfo();

      if (ADL.ADL_Overdrive5_FanSpeedInfo_Get(adapterIndex, 0, ref afsi)

        != ADL.ADL_OK) 

      {

        afsi.MaxPercent = 100;

        afsi.MinPercent = 0;

      }

      this.fanControl = new Control(controlSensor, settings, afsi.MinPercent, 

        afsi.MaxPercent);

      this.fanControl.ControlModeChanged += ControlModeChanged;

      this.fanControl.SoftwareControlValueChanged += 

        SoftwareControlValueChanged;

      ControlModeChanged(fanControl);

      this.controlSensor.Control = fanControl;

      Update();                   

    }

    private void SaveDefaultFanSpeed() {

      if (!restoreDefaultFanSpeedRequired) {        

        initialFanSpeedValue = new ADLFanSpeedValue();

        initialFanSpeedValue.SpeedType =

          ADL.ADL_DL_FANCTRL_SPEED_TYPE_PERCENT;

        restoreDefaultFanSpeedRequired = 

          ADL.ADL_Overdrive5_FanSpeed_Get(adapterIndex, 0,

          ref initialFanSpeedValue) == ADL.ADL_OK;

      }

    }

    private void RestoreDefaultFanSpeed() {

      if (restoreDefaultFanSpeedRequired) {        

        ADL.ADL_Overdrive5_FanSpeed_Set(adapterIndex, 0,

          ref this.initialFanSpeedValue);

        restoreDefaultFanSpeedRequired = false;

      }

    }

    private void SoftwareControlValueChanged(IControl control) {

      if (control.ControlMode == ControlMode.Software) {

        SaveDefaultFanSpeed();

        ADLFanSpeedValue adlf = new ADLFanSpeedValue();

        adlf.SpeedType = ADL.ADL_DL_FANCTRL_SPEED_TYPE_PERCENT;

        adlf.Flags = ADL.ADL_DL_FANCTRL_FLAG_USER_DEFINED_SPEED;

        adlf.FanSpeed = (int)control.SoftwareValue;

        ADL.ADL_Overdrive5_FanSpeed_Set(adapterIndex, 0, ref adlf);

      }

    }

    private void ControlModeChanged(IControl control) {

      if (control.ControlMode == ControlMode.Default) {

        RestoreDefaultFanSpeed();     

      } else {

        SoftwareControlValueChanged(control);

      }

    }

    public int BusNumber { get { return busNumber; } }

    public int DeviceNumber { get { return deviceNumber; } }

    public override HardwareType HardwareType {

      get { return HardwareType.GpuAti; }

    }

    public override void Update() {

      ADLTemperature adlt = new ADLTemperature();

      if (ADL.ADL_Overdrive5_Temperature_Get(adapterIndex, 0, ref adlt)

        == ADL.ADL_OK) 

      {

        temperature.Value = 0.001f * adlt.Temperature;

        ActivateSensor(temperature);

      } else {

        temperature.Value = null;

      }

      ADLFanSpeedValue adlf = new ADLFanSpeedValue();

      adlf.SpeedType = ADL.ADL_DL_FANCTRL_SPEED_TYPE_RPM;

      if (ADL.ADL_Overdrive5_FanSpeed_Get(adapterIndex, 0, ref adlf)

        == ADL.ADL_OK) 

      {

        fan.Value = adlf.FanSpeed;

        ActivateSensor(fan);

      } else {

        fan.Value = null;

      }

      adlf = new ADLFanSpeedValue();

      adlf.SpeedType = ADL.ADL_DL_FANCTRL_SPEED_TYPE_PERCENT;

      if (ADL.ADL_Overdrive5_FanSpeed_Get(adapterIndex, 0, ref adlf)

        == ADL.ADL_OK) {

        controlSensor.Value = adlf.FanSpeed;

        ActivateSensor(controlSensor);

      } else {

        controlSensor.Value = null;

      }

      ADLPMActivity adlp = new ADLPMActivity();

      if (ADL.ADL_Overdrive5_CurrentActivity_Get(adapterIndex, ref adlp)

        == ADL.ADL_OK) 

      {

        if (adlp.EngineClock > 0) {

          coreClock.Value = 0.01f * adlp.EngineClock;

          ActivateSensor(coreClock);

        } else {

          coreClock.Value = null;

        }

        if (adlp.MemoryClock > 0) {

          memoryClock.Value = 0.01f * adlp.MemoryClock;

          ActivateSensor(memoryClock);

        } else {

          memoryClock.Value = null;

        }

        if (adlp.Vddc > 0) {

          coreVoltage.Value = 0.001f * adlp.Vddc;

          ActivateSensor(coreVoltage);

        } else {

          coreVoltage.Value = null;

        }

        coreLoad.Value = Math.Min(adlp.ActivityPercent, 100);                        

        ActivateSensor(coreLoad);

      } else {

        coreClock.Value = null;

        memoryClock.Value = null;

        coreVoltage.Value = null;

        coreLoad.Value = null;

      }

    }

    public void Close() {

      this.fanControl.ControlModeChanged -= ControlModeChanged;

      this.fanControl.SoftwareControlValueChanged -=

        SoftwareControlValueChanged;

      RestoreDefaultFanSpeed();

    }

  }

}