/*

   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) 2009-2011 Michael Möller <mmoeller@openhardwaremonitor.org>

 */

 using System.Collections.Generic;

 using System.Globalization;

 using System.IO;

 using System.Text;

 namespace OpenHardwareMonitor.Hardware.LPC {

   internal class LMSensors {

     private readonly List<LMChip> lmChips = new List<LMChip>();

     public LMSensors() {

       string[] basePaths = Directory.GetDirectories("/sys/class/hwmon/");

       foreach (string basePath in basePaths) {

         foreach (string devicePath in new[] { "/device", "" }) {

           string path = basePath + devicePath;

           string name = null;

           try {

             using (StreamReader reader = new StreamReader(path + "/name"))

               name = reader.ReadLine();

           } catch (IOException) { }

           switch (name) {

             case "atk0110":

               lmChips.Add(new LMChip(Chip.ATK0110, path)); break;

             case "f71858fg":

               lmChips.Add(new LMChip(Chip.F71858, path)); break;

             case "f71862fg":

               lmChips.Add(new LMChip(Chip.F71862, path)); break;

             case "f71882fg":

               lmChips.Add(new LMChip(Chip.F71882, path)); break;

             case "f71889fg":

               lmChips.Add(new LMChip(Chip.F71889F, path)); break;

             case "it8712":

               lmChips.Add(new LMChip(Chip.IT8712F, path)); break;

             case "it8716":

               lmChips.Add(new LMChip(Chip.IT8716F, path)); break;

             case "it8718":

               lmChips.Add(new LMChip(Chip.IT8718F, path)); break;

             case "it8720":

               lmChips.Add(new LMChip(Chip.IT8720F, path)); break;

             case "w83627ehf":

               lmChips.Add(new LMChip(Chip.W83627EHF, path)); break;

             case "w83627dhg":

               lmChips.Add(new LMChip(Chip.W83627DHG, path)); break;

             case "w83667hg":

               lmChips.Add(new LMChip(Chip.W83667HG, path)); break;

             case "w83627hf":

               lmChips.Add(new LMChip(Chip.W83627HF, path)); break;

             case "w83627thf":

               lmChips.Add(new LMChip(Chip.W83627THF, path)); break;

             case "w83687thf":

               lmChips.Add(new LMChip(Chip.W83687THF, path)); break;

           }

         }

       }

     }

     public void Close() {

       foreach (LMChip lmChip in lmChips)

         lmChip.Close();

     }

     public ISuperIO[] SuperIO {

       get {

         return lmChips.ToArray();

       }

     }

     private class LMChip : ISuperIO {

       private string path;

       private readonly Chip chip;

       private readonly float?[] voltages;

       private readonly float?[] temperatures;

       private readonly float?[] fans;

       private readonly float?[] controls;

       private readonly FileStream[] voltageStreams;

       private readonly FileStream[] temperatureStreams;

       private readonly FileStream[] fanStreams;

       public Chip Chip { get { return chip; } }

       public float?[] Voltages { get { return voltages; } }

       public float?[] Temperatures { get { return temperatures; } }

       public float?[] Fans { get { return fans; } }

       public float?[] Controls { get { return controls; } }

       public LMChip(Chip chip, string path) {

         this.path = path;

         this.chip = chip;

         string[] voltagePaths = Directory.GetFiles(path, "in*_input");

         this.voltages = new float?[voltagePaths.Length];

         this.voltageStreams = new FileStream[voltagePaths.Length];

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

           voltageStreams[i] = new FileStream(voltagePaths[i],

             FileMode.Open, FileAccess.Read, FileShare.ReadWrite);

         string[] temperaturePaths = Directory.GetFiles(path, "temp*_input");

         this.temperatures = new float?[temperaturePaths.Length];

         this.temperatureStreams = new FileStream[temperaturePaths.Length];

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

           temperatureStreams[i] = new FileStream(temperaturePaths[i],

             FileMode.Open, FileAccess.Read, FileShare.ReadWrite);

         string[] fanPaths = Directory.GetFiles(path, "fan*_input");

         this.fans = new float?[fanPaths.Length];

         this.fanStreams = new FileStream[fanPaths.Length];

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

           fanStreams[i] = new FileStream(fanPaths[i],

             FileMode.Open, FileAccess.Read, FileShare.ReadWrite);

         this.controls = new float?[0];

       }

       public byte? ReadGPIO(int index) {

         return null;

       }

       public void WriteGPIO(int index, byte value) { }

       public string GetReport() {

         return null;

       }

       public void SetControl(int index, byte? value) { }   

       private string ReadFirstLine(Stream stream) {

         StringBuilder sb = new StringBuilder();

         try {

           stream.Seek(0, SeekOrigin.Begin);

           int b = stream.ReadByte();

           while (b != -1 && b != 10) {

             sb.Append((char)b);

             b = stream.ReadByte();

           }

         } catch { }

         return sb.ToString();

       }

       public void Update() {

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

           string s = ReadFirstLine(voltageStreams[i]);

           try {

             voltages[i] = 0.001f *

               long.Parse(s, CultureInfo.InvariantCulture);

           } catch {

             voltages[i] = null;

           }

         }

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

           string s = ReadFirstLine(temperatureStreams[i]);

           try {

             temperatures[i] = 0.001f *

               long.Parse(s, CultureInfo.InvariantCulture);

           } catch {

             temperatures[i] = null;

           }

         }

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

           string s = ReadFirstLine(fanStreams[i]);

           try {

             fans[i] = long.Parse(s, CultureInfo.InvariantCulture);

           } catch {

             fans[i] = null;

           }

         }

       }

       public void Close() {

         foreach (FileStream stream in voltageStreams)

           stream.Close();

         foreach (FileStream stream in temperatureStreams)

           stream.Close();

         foreach (FileStream stream in fanStreams)

           stream.Close();

       }

     }

   }

 }