/*
 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 "Volume/EncryptionTest.h"
#include "Volume/Hash.h"
#include "Main/GraphicUserInterface.h"
#include "BenchmarkDialog.h"
#include "EncryptionOptionsWizardPage.h"
#include "EncryptionTestDialog.h"

namespace VeraCrypt
{
	EncryptionOptionsWizardPage::EncryptionOptionsWizardPage (wxPanel* parent)
		: EncryptionOptionsWizardPageBase (parent)
	{

#ifdef TC_MACOSX
		EncryptionAlgorithmStaticText->Connect( wxEVT_SIZE, wxSizeEventHandler( EncryptionOptionsWizardPage::HandleOnSize ), NULL, this );
#endif
		EncryptionAlgorithms = EncryptionAlgorithm::GetAvailableAlgorithms();
		foreach (shared_ptr <EncryptionAlgorithm> ea, EncryptionAlgorithms)
		{
			if (!ea->IsDeprecated())
				EncryptionAlgorithmChoice->Append (ea->GetName(true), ea.get());
		}

		EncryptionAlgorithmChoice->Select (0);

		Hashes = Hash::GetAvailableAlgorithms();
		foreach (shared_ptr <Hash> hash, Hashes)
		{
			if (!hash->IsDeprecated())
				HashChoice->Append (hash->GetName(), hash.get());
		}

		HashChoice->Select (0);
		OnEncryptionAlgorithmSelected();

	}

#ifdef TC_MACOSX
	EncryptionOptionsWizardPage::~EncryptionOptionsWizardPage()
	{
		EncryptionAlgorithmStaticText->Disconnect( wxEVT_SIZE, wxSizeEventHandler( EncryptionOptionsWizardPage::HandleOnSize ), NULL, this );
	}
	
	void EncryptionOptionsWizardPage::HandleOnSize( wxSizeEvent& event )
	{
		int width, height;
		EncryptionAlgorithmStaticText->GetClientSize (&width, &height);
		EncryptionAlgorithmStaticText->Wrap (width);
		event.Skip();
	}
#endif

	shared_ptr <EncryptionAlgorithm> EncryptionOptionsWizardPage::GetEncryptionAlgorithm () const
	{
		return Gui->GetSelectedData <EncryptionAlgorithm> (EncryptionAlgorithmChoice)->GetNew();
	}

	shared_ptr <Hash> EncryptionOptionsWizardPage::GetHash () const
	{
		return Gui->GetSelectedData <Hash> (HashChoice)->GetNew();
	}

	void EncryptionOptionsWizardPage::OnBenchmarkButtonClick (wxCommandEvent& event)
	{
		BenchmarkDialog dialog (this);
		dialog.ShowModal();
	}

	void EncryptionOptionsWizardPage::OnEncryptionAlgorithmSelected ()
	{
		FreezeScope freeze (this);

		shared_ptr <EncryptionAlgorithm> ea = GetEncryptionAlgorithm();
		CipherList ciphers = ea->GetCiphers();

		if (ciphers.size() == 1)
		{
			EncryptionAlgorithmHyperlink->SetLabel (StringFormatter (LangString["MORE_INFO_ABOUT"], ea->GetName()));

			if (typeid (*ea) == typeid (AES))
				EncryptionAlgorithmStaticText->SetLabel (LangString["AES_HELP"]);
			else if (typeid (*ea) == typeid (Serpent))
				EncryptionAlgorithmStaticText->SetLabel (LangString["SERPENT_HELP"]);
			else if (typeid (*ea) == typeid (Twofish))
				EncryptionAlgorithmStaticText->SetLabel (LangString["TWOFISH_HELP"]);
			else if (typeid (*ea) == typeid (Camellia))
				EncryptionAlgorithmStaticText->SetLabel (LangString["CAMELLIA_HELP"]);
			else if (typeid (*ea) == typeid (Kuznyechik))
				EncryptionAlgorithmStaticText->SetLabel (LangString["KUZNYECHIK_HELP"]);
			else
				EncryptionAlgorithmStaticText->SetLabel (L"");
		}
		else
		{
			if (ciphers.size() == 2)
			{
				EncryptionAlgorithmStaticText->SetLabel (StringFormatter (LangString["TWO_LAYER_CASCADE_HELP"],
					ciphers[0]->GetName(), (int) ciphers[0]->GetKeySize() * 8,
					ciphers[1]->GetName(), (int) ciphers[1]->GetKeySize() * 8));
			}
			else if (ciphers.size() == 3)
			{
				EncryptionAlgorithmStaticText->SetLabel (StringFormatter (LangString["THREE_LAYER_CASCADE_HELP"],
					ciphers[0]->GetName(), (int) ciphers[0]->GetKeySize() * 8,
					ciphers[1]->GetName(), (int) ciphers[1]->GetKeySize() * 8,
					ciphers[2]->GetName(), (int) ciphers[2]->GetKeySize() * 8));
			}
			else
				EncryptionAlgorithmStaticText->SetLabel (L"");

			EncryptionAlgorithmHyperlink->SetLabel (_("More information"));
		}

		Layout();
	}

	void EncryptionOptionsWizardPage::OnEncryptionAlgorithmHyperlinkClick (wxHyperlinkEvent& event)
	{
		if (GetEncryptionAlgorithm()->GetCiphers().size() == 1)
			Gui->OpenHomepageLink (this, wxString (GetEncryptionAlgorithm()->GetName()).Lower());
		else
			Gui->OpenHomepageLink (this, L"cascades");
	}

	void EncryptionOptionsWizardPage::OnHashHyperlinkClick (wxHyperlinkEvent& event)
	{
		Gui->OpenHomepageLink (this, L"hashalgorithms");
	}

	void EncryptionOptionsWizardPage::OnTestButtonClick (wxCommandEvent& event)
	{
		EncryptionTestDialog dialog (this);
		dialog.ShowModal();
	}

	void EncryptionOptionsWizardPage::SetEncryptionAlgorithm (shared_ptr <EncryptionAlgorithm> algorithm)
	{
		if (algorithm)
		{
			EncryptionAlgorithmChoice->SetStringSelection (algorithm->GetName(true));
			OnEncryptionAlgorithmSelected ();
		}
	}

	void EncryptionOptionsWizardPage::SetHash (shared_ptr <Hash> hash)
	{
		if (hash)
			HashChoice->SetStringSelection (hash->GetName());
	}
}