/*
	(c) Copyright  2012 - 2018 Anton Sviridenko
	https://picapica.im

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, version 3.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/
#include "accountswindow.h"
#include <QVBoxLayout>
#include "mainwindow.h"
#include "globals.h"
#include "dialogs/addaccountdialog.h"
#include "dialogs/registeraccountdialog.h"
#include "dialogs/showpicaiddialog.h"
#include "../PICA_client.h"
#include "skynet.h"
#include "openssltool.h"
#include <QMessageBox>
#include <QApplication>
#include <cstring>

AccountsWindow::AccountsWindow(QWidget *parent) :
	QMainWindow(parent),
	accounts(config_dbname)
{
	QVBoxLayout *layout;
	layout = new QVBoxLayout;

	cb_accounts = new QComboBox();
	bt_login = new QPushButton(tr("Log In"));
	bt_registernew = new QPushButton(tr("Create New Account..."));
	bt_addimport = new QPushButton(tr("Add (Import) existing account..."));
	bt_delete = new QPushButton(tr("Delete Account"));

	{
		QFont f;
		f = bt_login->font();
		f.setBold(true);
		bt_login->setFont(f);

		f = cb_accounts->font();
		f.setStyleHint(QFont::Monospace);
		f.setFixedPitch(true);
		f.setBold(true);
		f.setFamily("Liberation Mono");
		cb_accounts->setFont(f);
	}

	layout->addWidget(cb_accounts);
	layout->addWidget(bt_login);
	layout->addWidget(bt_registernew);
	layout->addWidget(bt_addimport);
	layout->addWidget(bt_delete);

	QWidget *central = new QWidget(this);
	setCentralWidget(central);

	centralWidget()->setLayout(layout);

	setWindowIcon(picapica_ico_sit);

	connect(bt_login, SIGNAL(clicked()), this, SLOT(login_click()));
	connect(bt_registernew, SIGNAL(clicked()), this, SLOT(register_click()));
	connect(bt_addimport, SIGNAL(clicked()), this, SLOT(add_click()));
	connect(bt_delete, SIGNAL(clicked()), this, SLOT(delete_click()));

	LoadAccounts();
}

void AccountsWindow::LoadAccounts()
{
	cb_accounts->clear();
	L.clear();
	L = accounts.GetAccounts();

	if (0 == L.count())
	{
		cb_accounts->addItem(tr(" ---No Accounts --"));

		bt_login->setDisabled(true);
	}
	else
	{
		for (int i = 0; i < L.count(); i++)
			cb_accounts->addItem(QString("%1 (%2...)").arg(L[i].name).arg(L[i].id.toBase64().left(8).constData()), L[i].id);

		bt_login->setEnabled(true);
	}
}

void AccountsWindow::login_click()
{
	int L_index;

	for (int i = 0; i < L.count(); i++)
	{
		if (L[i].id == cb_accounts->itemData(cb_accounts->currentIndex()))
		{
			L_index = i;
			break;
		}
	}

	{
		QString error_str;
		if (!Accounts::CheckFiles(L[L_index], error_str))
		{
			QMessageBox mbx;
			mbx.setText(error_str);
			mbx.exec();
			return;
		}
	}

	Accounts::SetCurrentAccount(L[L_index]);

	skynet->Join(L[L_index]);

	mainwindow = new MainWindow();
	mainwindow->show();
	this->hide();

}

void AccountsWindow::CreateAccount(QString CertFilename, QString PkeyFilename, bool copyfiles)
{
	QByteArray id(PICA_ID_SIZE, 0);
	int ret;

	ret = PICA_get_id_from_cert_file(CertFilename.toUtf8().constData(), (unsigned char*)id.data());

	if (0 == ret)
	{
		QMessageBox mbx;
		mbx.setText("Invalid certificate");
		mbx.exec();
		return;
	}

	QString name = OpenSSLTool::NameFromCertFile(CertFilename);

	Accounts::AccountRecord rec;
	QString certfilename, pkeyfilename;

	if (copyfiles)
	{
		QDir dir(config_dir);
		dir.mkdir(name + '_' + id.toHex().constData());
		dir.cd(name + '_' + id.toHex().constData());

		certfilename = dir.absolutePath() + "/" + id.toHex().constData() + "_cert.pem";
		pkeyfilename = dir.absolutePath() + "/" + id.toHex().constData() + "_pkey.pem";

		QFile::copy(CertFilename, certfilename);
		QFile::copy(PkeyFilename, pkeyfilename);
	}
	else
	{
		certfilename = CertFilename;
		pkeyfilename = PkeyFilename;
	}

	rec.id = id;
	rec.name = name;
	rec.cert_file = certfilename;
	rec.pkey_file = pkeyfilename;
	rec.CA_file = QLatin1String("none");

	accounts.Add(rec);

	if (!accounts.isOK())
	{
		QMessageBox mbx;
		mbx.setText(accounts.GetLastError());
		mbx.exec();
	}
	else
	{
		ShowPicaIdDialog d(name, id, tr("New account is created"));
		d.exec();
	}
	LoadAccounts();
}

void AccountsWindow::register_click()
{
	RegisterAccountDialog d;
	d.exec();

	if (d.result())
	{
		CreateAccount(d.GetCertFilename(), d.GetPkeyFilename(), true);

		QFile::remove(d.GetCertFilename());
		QFile::remove(d.GetPkeyFilename());
	}
}

void AccountsWindow::add_click()
{
	AddAccountDialog d;
	d.exec();

	if (d.result())
	{
		CreateAccount(d.GetCertFilename(), d.GetPkeyFilename(), d.isCopyFilesChecked());
	}
}

void AccountsWindow::delete_click()
{
	QByteArray id = (cb_accounts->itemData(cb_accounts->currentIndex())).toByteArray();

	if (QMessageBox::No ==
	        QMessageBox::question(this, tr("Deleting account"), tr("Are you sure you want to delete account %1 ?").arg(id.toBase64().constData()), QMessageBox::Yes, QMessageBox::No))
		return;

	//TODO ask user if he wants to wipe certificate and private key too

	accounts.Delete(id);

	LoadAccounts();

}

void AccountsWindow::closeEvent(QCloseEvent *e)
{
	QApplication::instance()->quit();
	QMainWindow::closeEvent(e);
}