/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file)
 and all other portions of this file are Copyright (c) 2013-2017 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#include "System.h"
#include "Main/GraphicUserInterface.h"
#include "VolumeCreationProgressWizardPage.h"

namespace VeraCrypt
{
	VolumeCreationProgressWizardPage::VolumeCreationProgressWizardPage (wxPanel* parent, bool displayKeyInfo)
		: VolumeCreationProgressWizardPageBase (parent),
		PreviousGaugeValue (0),
		ProgressBarRange (1),
		RealProgressBarRange (1),
		VolumeCreatorRunning (false),
		MouseEventsCounter (0)
	{
		DisplayKeysCheckBox->SetValue (displayKeyInfo);
#ifdef TC_WINDOWS
		DisplayKeysCheckBox->SetLabel (L"");
#endif

#ifdef TC_MACOSX
		ProgressGauge->SetMinSize (wxSize (-1, 12)); // OS X apparently supports only up to 12px thick progress bars
		KeySamplesUpperSizer->Remove (KeySamplesUpperInnerSizer);
#else
		ProgressGauge->SetMinSize (wxSize (-1, Gui->GetCharHeight (this) * 2));
#endif

		CollectedEntropy->SetRange (RNG_POOL_SIZE * 8);

		if (DisplayKeysCheckBox->IsChecked())
			ShowBytes (RandomPoolSampleStaticText, RandomNumberGenerator::PeekPool(), true);
		else
			ShowAsterisks (RandomPoolSampleStaticText);

		class Timer : public wxTimer
		{
		public:
			Timer (VolumeCreationProgressWizardPage *page) : Page (page) { }

			void Notify()
			{
				Page->OnRandomPoolTimer();
			}

			VolumeCreationProgressWizardPage *Page;
		};

		RandomPoolTimer.reset (dynamic_cast <wxTimer *> (new Timer (this)));
		RandomPoolTimer->Start (30);

		AbortButton->Disable();
		ProgressGauge->SetValue (0);

	}

	void VolumeCreationProgressWizardPage::OnAbortButtonClick (wxCommandEvent& event)
	{
		AbortEvent.Raise();
	}

	void VolumeCreationProgressWizardPage::OnDisplayKeysCheckBoxClick (wxCommandEvent& event)
	{
		if (!event.IsChecked())
		{
			ShowAsterisks (RandomPoolSampleStaticText);
			ShowAsterisks (HeaderKeySampleStaticText);
			ShowAsterisks (MasterKeySampleStaticText);
		}
		else
		{
			RandomPoolSampleStaticText->SetLabel (L"");
			HeaderKeySampleStaticText->SetLabel (L"");
			MasterKeySampleStaticText->SetLabel (L"");
		}
	}

	void VolumeCreationProgressWizardPage::OnRandomPoolTimer ()
	{
		if (!VolumeCreatorRunning && DisplayKeysCheckBox->IsChecked())
			ShowBytes (RandomPoolSampleStaticText, RandomNumberGenerator::PeekPool(), true);
	}

	void VolumeCreationProgressWizardPage::SetKeyInfo (const VolumeCreator::KeyInfo &keyInfo)
	{
		if (DisplayKeysCheckBox->IsChecked())
		{
			ShowBytes (RandomPoolSampleStaticText, RandomNumberGenerator::PeekPool(), true);
			ShowBytes (HeaderKeySampleStaticText, keyInfo.HeaderKey);
			ShowBytes (MasterKeySampleStaticText, keyInfo.MasterKey);
		}
	}

	void VolumeCreationProgressWizardPage::ShowAsterisks (wxStaticText *textCtrl)
	{
		wxString str;
		for (size_t i = 0; i < MaxDisplayedKeyBytes + 1; ++i)
		{
			str += L"**";
		}

		textCtrl->SetLabel (str.c_str());
	}

	void VolumeCreationProgressWizardPage::ShowBytes (wxStaticText *textCtrl, const ConstBufferPtr &buffer, bool appendDots)
	{
		wxString str;

		for (size_t i = 0; i < MaxDisplayedKeyBytes && i < buffer.Size(); ++i)
		{
			str += wxString::Format (L"%02X", buffer[i]);
		}

		if (appendDots)
			str += L"..";

		textCtrl->SetLabel (str.c_str());

		for (size_t i = 0; i < str.size(); ++i)
		{
			str[i] = L'X';
		}
	}

	void VolumeCreationProgressWizardPage::SetProgressValue (uint64 value)
	{
		int gaugeValue = static_cast <int> (value * RealProgressBarRange / ProgressBarRange);

		if (value == ProgressBarRange)
			gaugeValue = RealProgressBarRange; // Prevent round-off error

		if (gaugeValue != PreviousGaugeValue)
		{
			ProgressGauge->SetValue (gaugeValue);
			PreviousGaugeValue = gaugeValue;
		}

		if (value != 0)
		{
			SizeDoneStaticText->SetLabel (wxString::Format (L"%7.3f%%", 100.0 - double (ProgressBarRange - value) / (double (ProgressBarRange) / 100.0)));

			wxLongLong timeDiff = wxGetLocalTimeMillis() - StartTime;
			if (timeDiff.GetValue() > 0)
			{
				uint64 speed = value * 1000 / timeDiff.GetValue();

				if (ProgressBarRange != value)
					SpeedStaticText->SetLabel (Gui->SpeedToString (speed));

				TimeLeftStaticText->SetLabel (speed > 0 ? Gui->TimeSpanToString ((ProgressBarRange - value) / speed) : L"");
			}
		}
		else
		{
			SizeDoneStaticText->SetLabel (L"");
			SpeedStaticText->SetLabel (L"");
			TimeLeftStaticText->SetLabel (L"");
		}
	}

	void VolumeCreationProgressWizardPage::SetMaxStaticTextWidth (int width)
	{
		InfoStaticText->Wrap (width);
	}

	void VolumeCreationProgressWizardPage::SetProgressState (bool volumeCreatorRunning)
	{
		if (volumeCreatorRunning)
			StartTime = wxGetLocalTimeMillis();

		VolumeCreatorRunning = volumeCreatorRunning;
	}

	void VolumeCreationProgressWizardPage::SetProgressRange (uint64 progressBarRange)
	{
		ProgressBarRange = progressBarRange;
		RealProgressBarRange = ProgressGauge->GetSize().GetWidth();
		ProgressGauge->SetRange (RealProgressBarRange);
	}

	void VolumeCreationProgressWizardPage::IncrementEntropyProgress ()
	{
		ScopeLock lock (AccessMutex);
		if (MouseEventsCounter < (RNG_POOL_SIZE * 8))
			CollectedEntropy->SetValue (++MouseEventsCounter);
	}
}