/*
 Copyright (c) 2010 TrueCrypt Developers Association. All rights reserved.

 Governed by the TrueCrypt License 3.0 the full text of which is contained in
 the file License.txt included in TrueCrypt binary and source code distribution
 packages.
*/

#include "System.h"
#include "Volume/EncryptionModeXTS.h"
#include "Main/GraphicUserInterface.h"
#include "BenchmarkDialog.h"

namespace VeraCrypt
{
	BenchmarkDialog::BenchmarkDialog (wxWindow *parent)
		: BenchmarkDialogBase (parent)
	{
		BenchmarkNoteStaticText->SetLabel (LangString["IDT_BOX_BENCHMARK_INFO"]);
		BenchmarkNoteStaticText->Wrap (RightSizer->GetSize().GetWidth());

		list <size_t> bufferSizes;
		bufferSizes.push_back (1 * BYTES_PER_MB);
		bufferSizes.push_back (5 * BYTES_PER_MB);
		bufferSizes.push_back (10 * BYTES_PER_MB);
		bufferSizes.push_back (50 * BYTES_PER_MB);
		bufferSizes.push_back (100 * BYTES_PER_MB);
		bufferSizes.push_back (200 * BYTES_PER_MB);
		bufferSizes.push_back (500 * BYTES_PER_MB);
		bufferSizes.push_back (1 * BYTES_PER_GB);

		foreach (size_t size, bufferSizes)
		{
			BufferSizeChoice->Append (Gui->SizeToString (size), (void *) size);
		}

		BufferSizeChoice->Select (1);

		list <int> colPermilles;
		BenchmarkListCtrl->InsertColumn (ColumnAlgorithm, LangString["ALGORITHM"], wxLIST_FORMAT_LEFT, 1);
		colPermilles.push_back (322);

		BenchmarkListCtrl->InsertColumn (ColumnEncryption, LangString["ENCRYPTION"], wxLIST_FORMAT_RIGHT, 1);
		colPermilles.push_back (226);

		BenchmarkListCtrl->InsertColumn (ColumnDecryption, LangString["DECRYPTION"], wxLIST_FORMAT_RIGHT, 1);
		colPermilles.push_back (226);

		BenchmarkListCtrl->InsertColumn (ColumnMean, LangString["MEAN"], wxLIST_FORMAT_RIGHT, 1);
		colPermilles.push_back (226);

		Gui->SetListCtrlWidth (BenchmarkListCtrl, 62, false);
		Gui->SetListCtrlHeight (BenchmarkListCtrl, 14);
		Gui->SetListCtrlColumnWidths (BenchmarkListCtrl, colPermilles);

		Layout();
		Fit();
		Center();
	}

	void BenchmarkDialog::OnBenchmarkButtonClick (wxCommandEvent& event)
	{
		try
		{
			list <BenchmarkResult> results;

			wxBusyCursor busy;
			Buffer buffer ((size_t) Gui->GetSelectedData <size_t> (BufferSizeChoice));

			EncryptionAlgorithmList encryptionAlgorithms = EncryptionAlgorithm::GetAvailableAlgorithms();
			foreach (shared_ptr <EncryptionAlgorithm> ea, encryptionAlgorithms)
			{
				if (!ea->IsDeprecated())
				{
					BenchmarkResult result;
					result.AlgorithmName = ea->GetName();

					Buffer key (ea->GetKeySize());
					ea->SetKey (key);

					shared_ptr <EncryptionMode> xts (new EncryptionModeXTS);
					xts->SetKey (key);
					ea->SetMode (xts);

					wxLongLong startTime = wxGetLocalTimeMillis();

					// CPU "warm up" (an attempt to prevent skewed results on systems where CPU frequency gradually changes depending on CPU load).
					do
					{
						ea->EncryptSectors (buffer, 0, buffer.Size() / ENCRYPTION_DATA_UNIT_SIZE, ENCRYPTION_DATA_UNIT_SIZE);
					}
					while (wxGetLocalTimeMillis().GetValue() - startTime.GetValue() < 20);

					uint64 size = 0;
					uint64 time;
					startTime = wxGetLocalTimeMillis();

					do
					{
						ea->EncryptSectors (buffer, 0, buffer.Size() / ENCRYPTION_DATA_UNIT_SIZE, ENCRYPTION_DATA_UNIT_SIZE);
						size += buffer.Size();
						time = (uint64) (wxGetLocalTimeMillis().GetValue() - startTime.GetValue());
					}
					while (time < 100);

					result.EncryptionSpeed = size * 1000 / time;

					startTime = wxGetLocalTimeMillis();
					size = 0;

					do
					{
						ea->DecryptSectors (buffer, 0, buffer.Size() / ENCRYPTION_DATA_UNIT_SIZE, ENCRYPTION_DATA_UNIT_SIZE);
						size += buffer.Size();
						time = (uint64) (wxGetLocalTimeMillis().GetValue() - startTime.GetValue());
					}
					while (time < 100);

					result.DecryptionSpeed = size * 1000 / time;
					result.MeanSpeed = (result.EncryptionSpeed + result.DecryptionSpeed) / 2;

					bool inserted = false;
					for (list <BenchmarkResult>::iterator i = results.begin(); i != results.end(); ++i)
					{
						if (i->MeanSpeed < result.MeanSpeed)
						{
							results.insert (i, result);
							inserted = true;
							break;
						}
					}

					if (!inserted)
						results.push_back (result);
				}
			}

			BenchmarkListCtrl->DeleteAllItems();

			foreach (const BenchmarkResult &result, results)
			{
				vector <wstring> fields (BenchmarkListCtrl->GetColumnCount());
					
				fields[ColumnAlgorithm] = result.AlgorithmName;
				fields[ColumnEncryption] = Gui->SpeedToString (result.EncryptionSpeed);
				fields[ColumnDecryption] = Gui->SpeedToString (result.DecryptionSpeed);
				fields[ColumnMean] = Gui->SpeedToString (result.MeanSpeed);

				Gui->AppendToListCtrl (BenchmarkListCtrl, fields);
			}
		}
		catch (exception &e)
		{
			Gui->ShowError (e);
		}
	}
}