/*

  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) 2009-2014 Michael Möller <mmoeller@openhardwaremonitor.org>

*/

using System;

using System.Collections.Generic;

using System.Globalization;

using System.Text;

namespace OpenHardwareMonitor.Hardware.CPU {

  internal class CPUGroup : IGroup {

    private readonly List<GenericCPU> hardware = new List<GenericCPU>();

    private readonly CPUID[][][] threads;

    private static CPUID[][] GetProcessorThreads() {

      List<CPUID> threads = new List<CPUID>();

      for (int i = 0; i < 64; i++) {

        try {

          threads.Add(new CPUID(i));

        } catch (ArgumentOutOfRangeException) { }

      }

      SortedDictionary<uint, List<CPUID>> processors =

        new SortedDictionary<uint, List<CPUID>>();

      foreach (CPUID thread in threads) {

        List<CPUID> list;

        processors.TryGetValue(thread.ProcessorId, out list);

        if (list == null) {

          list = new List<CPUID>();

          processors.Add(thread.ProcessorId, list);

        }

        list.Add(thread);

      }

      CPUID[][] processorThreads = new CPUID[processors.Count][];

      int index = 0;

      foreach (List<CPUID> list in processors.Values) {

        processorThreads[index] = list.ToArray();

        index++;

      }

      return processorThreads;

    }

    private static CPUID[][] GroupThreadsByCore(IEnumerable<CPUID> threads) {

      SortedDictionary<uint, List<CPUID>> cores = 

        new SortedDictionary<uint, List<CPUID>>();

      foreach (CPUID thread in threads) {

        List<CPUID> coreList;

        cores.TryGetValue(thread.CoreId, out coreList);

        if (coreList == null) {

          coreList = new List<CPUID>();

          cores.Add(thread.CoreId, coreList);

        }

        coreList.Add(thread);

      }

      CPUID[][] coreThreads = new CPUID[cores.Count][];

      int index = 0;

      foreach (List<CPUID> list in cores.Values) {

        coreThreads[index] = list.ToArray();

        index++;

      }

      return coreThreads;

    }

    public CPUGroup(ISettings settings) {

      CPUID[][] processorThreads = GetProcessorThreads();

      this.threads = new CPUID[processorThreads.Length][][];

      int index = 0;

      foreach (CPUID[] threads in processorThreads) {

        if (threads.Length == 0)

          continue;

        CPUID[][] coreThreads = GroupThreadsByCore(threads);

        this.threads[index] = coreThreads;

        switch (threads[0].Vendor) {

          case Vendor.Intel:

            hardware.Add(new IntelCPU(index, coreThreads, settings));

            break;

          case Vendor.AMD:

            switch (threads[0].Family) {

              case 0x0F:

                hardware.Add(new AMD0FCPU(index, coreThreads, settings));

                break;

              case 0x10:

              case 0x11:

              case 0x12:

              case 0x14:

              case 0x15:

              case 0x16:

                hardware.Add(new AMD10CPU(index, coreThreads, settings));

                break;

              default:

                hardware.Add(new GenericCPU(index, coreThreads, settings));

                break;

            } break;

          default:

            hardware.Add(new GenericCPU(index, coreThreads, settings));

            break;

        }

        index++;

      }

    }

    public IHardware[] Hardware {

      get {

        return hardware.ToArray();

      }

    }

    private static void AppendCpuidData(StringBuilder r, uint[,] data, 

      uint offset) 

    {

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

        r.Append(" ");

        r.Append((i + offset).ToString("X8", CultureInfo.InvariantCulture));

        for (int j = 0; j < 4; j++) {

          r.Append("  ");

          r.Append(data[i, j].ToString("X8", CultureInfo.InvariantCulture));

        }

        r.AppendLine();

      }

    }

    public string GetReport() {

      if (threads == null)

        return null;

      StringBuilder r = new StringBuilder();

      r.AppendLine("CPUID");

      r.AppendLine();

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

        r.AppendLine("Processor " + i);

        r.AppendLine();

        r.AppendFormat("Processor Vendor: {0}{1}", threads[i][0][0].Vendor,

          Environment.NewLine);

        r.AppendFormat("Processor Brand: {0}{1}", threads[i][0][0].BrandString,

          Environment.NewLine);

        r.AppendFormat("Family: 0x{0}{1}", 

          threads[i][0][0].Family.ToString("X", CultureInfo.InvariantCulture), 

          Environment.NewLine);

        r.AppendFormat("Model: 0x{0}{1}",

          threads[i][0][0].Model.ToString("X", CultureInfo.InvariantCulture), 

          Environment.NewLine);

        r.AppendFormat("Stepping: 0x{0}{1}",

          threads[i][0][0].Stepping.ToString("X", CultureInfo.InvariantCulture), 

          Environment.NewLine);

        r.AppendLine();

        r.AppendLine("CPUID Return Values");

        r.AppendLine();

        for (int j = 0; j < threads[i].Length; j++)

          for (int k = 0; k < threads[i][j].Length; k++) {

            r.AppendLine(" CPU Thread: " + threads[i][j][k].Thread);

            r.AppendLine(" APIC ID: " + threads[i][j][k].ApicId);

            r.AppendLine(" Processor ID: " + threads[i][j][k].ProcessorId);

            r.AppendLine(" Core ID: " + threads[i][j][k].CoreId);

            r.AppendLine(" Thread ID: " + threads[i][j][k].ThreadId);

            r.AppendLine();

            r.AppendLine(" Function  EAX       EBX       ECX       EDX");

            AppendCpuidData(r, threads[i][j][k].Data, CPUID.CPUID_0);

            AppendCpuidData(r, threads[i][j][k].ExtData, CPUID.CPUID_EXT);

            r.AppendLine();

          }

      }

      return r.ToString(); 

    }

    public void Close() {

      foreach (GenericCPU cpu in hardware) {

        cpu.Close();

      }

    }

  }

}