/*
    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
    
    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; either version 2 of the License, or
    (at your option) any later version.
    
    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 <QRegExp>
#include <QLineEdit>
#include <QLabel>
#include <QValidator>
#include <QComboBox>
#include <QTextStream>
#include "gui.h"
#include <QFile>
#include <QRegExpValidator>
#include "wizardform.h"

#define PROV_NONE	QT_TRANSLATE_NOOP("WizardForm", "None (direct IP to IP calls)")
#define PROV_OTHER	QT_TRANSLATE_NOOP("WizardForm", "Other")

struct t_provider {
	QString domain;
	QString sip_proxy;
	QString stun_server;
};

/*
 *  Constructs a WizardForm as a child of 'parent', with the
 *  name 'name' and widget flags set to 'f'.
 *
 *  The dialog will by default be modeless, unless you set 'modal' to
 *  true to construct a modal dialog.
 */
WizardForm::WizardForm(QWidget* parent)
    : QDialog(parent)
{
	setupUi(this);

	init();
}

/*
 *  Destroys the object and frees any allocated resources
 */
WizardForm::~WizardForm()
{
	// no need to delete child widgets, Qt does it all for us
}

/*
 *  Sets the strings of the subwidgets using the current
 *  language.
 */
void WizardForm::languageChange()
{
	retranslateUi(this);
}


void WizardForm::init()
{
	QRegExp rxNoSpace("\\S*");
	
	// Set validators
	usernameLineEdit->setValidator(new QRegExpValidator(rxNoSpace, this));
	domainLineEdit->setValidator(new QRegExpValidator(rxNoSpace, this));
	authNameLineEdit->setValidator(new QRegExpValidator(rxNoSpace, this));
	proxyLineEdit->setValidator(new QRegExpValidator(rxNoSpace, this));
	
	initProviders();
    serviceProviderComboBox->setCurrentIndex(serviceProviderComboBox->count() - 1);
	update(tr(PROV_OTHER));
}

void WizardForm::initProviders()
{
	serviceProviderComboBox->clear();
    serviceProviderComboBox->addItem(tr(PROV_NONE));
	
	QString fname = sys_config->get_dir_share().c_str();
	fname.append("/").append(FILE_PROVIDERS);
	QFile providersFile(fname);
	if (providersFile.open(QIODevice::ReadOnly)) {
		QTextStream providersStream(&providersFile);
		QString entry;
		while ((entry = providersStream.readLine()) != QString::null) {
			// Skip comment
			if (entry[0] == '#') continue;
			
            QStringList l = entry.split(";", QString::KeepEmptyParts);
			
			// Skip invalid lines
			if (l.size() != 4) continue;
			
			t_provider p;
			p.domain = l[1];
			p.sip_proxy = l[2];
			p.stun_server = l[3];
			mapProviders[l[0]] = p;
			
            serviceProviderComboBox->addItem(l[0]);
		}
		providersFile.close();
	}
	
    serviceProviderComboBox->addItem(tr(PROV_OTHER));
}

int WizardForm::exec(t_user *user)
{
	user_config = user;
	
	// Set user profile name in the titlebar
	QString s = PRODUCT_NAME;
	s.append(" - ").append(tr("User profile wizard:")).append(" ");
	s.append(user_config->get_profile_name().c_str());
    setWindowTitle(s);
	
	return QDialog::exec();
}

void WizardForm::show(t_user *user)
{
	user_config = user;
	
	// Set user profile name in the titlebar
	QString s = PRODUCT_NAME;
	s.append(" - ").append(tr("User profile wizard:")).append(" ");
	s.append(user_config->get_profile_name().c_str());
    setWindowTitle(s);
	
	QDialog::show();
}

void WizardForm::update(const QString &item)
{
	// Disable/Enable controls
	if (item == tr(PROV_NONE)) {
		suggestAuthName = false;
		authNameTextLabel->setEnabled(false);
		authNameLineEdit->setEnabled(false);
		authPasswordTextLabel->setEnabled(false);
		authPasswordLineEdit->setEnabled(false);
		proxyTextLabel->setEnabled(false);
		proxyLineEdit->setEnabled(false);
		stunServerTextLabel->setEnabled(false);
		stunServerLineEdit->setEnabled(false);
	} else {
		if (usernameLineEdit->text() == authNameLineEdit->text()) {
			suggestAuthName = true;
		} else {
			suggestAuthName = false;
		}
		
		authNameTextLabel->setEnabled(true);
		authNameLineEdit->setEnabled(true);
		authPasswordTextLabel->setEnabled(true);
		authPasswordLineEdit->setEnabled(true);
		proxyTextLabel->setEnabled(true);
		proxyLineEdit->setEnabled(true);
		stunServerTextLabel->setEnabled(true);
		stunServerLineEdit->setEnabled(true);
	}
	
	// Set values
	if (item == tr(PROV_NONE)) {
		domainLineEdit->clear();
		authNameLineEdit->clear();
		authPasswordLineEdit->clear();
		proxyLineEdit->clear();
		stunServerLineEdit->clear();
	} else if (item == tr(PROV_OTHER)) {
		domainLineEdit->clear();
		stunServerLineEdit->clear();
		proxyLineEdit->clear();
	} else {
		t_provider p = mapProviders[item];
		domainLineEdit->setText(p.domain);
		proxyLineEdit->setText(p.sip_proxy);
		stunServerLineEdit->setText(p.stun_server);
	}
}

void WizardForm::updateAuthName(const QString &s)
{
	if (suggestAuthName) {
		authNameLineEdit->setText(s);
	}
}

void WizardForm::disableSuggestAuthName()
{
	suggestAuthName = false;
}

void WizardForm::validate()
{
	QString s;
	
	// Validity check user page
	// SIP username is mandatory
	if (usernameLineEdit->text().isEmpty()) {
        ((t_gui *)ui)->cb_show_msg(this, tr("You must fill in a user name for your SIP account.").toStdString(),
				MSG_CRITICAL);
		usernameLineEdit->setFocus();
		return;
	}
	
	// SIP user domain is mandatory
	if (domainLineEdit->text().isEmpty()) {
		((t_gui *)ui)->cb_show_msg(this, tr(
				"You must fill in a domain name for your SIP account.\n"
				"This could be the hostname or IP address of your PC "
                "if you want direct PC to PC dialing.").toStdString(),
				MSG_CRITICAL);
		domainLineEdit->setFocus();
		return;
	}
	
	// SIP proxy
	if (proxyLineEdit->text() != "") {
		s = USER_SCHEME;
		s.append(':').append(proxyLineEdit->text());
        t_url u(s.toStdString());
		if (!u.is_valid() || u.get_user() != "") {
            ((t_gui *)ui)->cb_show_msg(this, tr("Invalid value for SIP proxy.").toStdString(),
					MSG_CRITICAL);
			proxyLineEdit->setFocus();
			proxyLineEdit->selectAll();
			return;
		}
	}
	
	// Register and publish presence at startup
	if (serviceProviderComboBox->currentText() == tr(PROV_NONE)) {
		user_config->set_register_at_startup(false);
		user_config->set_pres_publish_startup(false);
	}
	
	// STUN server
	if (stunServerLineEdit->text() != "") {
		s = "stun:";
		s.append(stunServerLineEdit->text());
        t_url u(s.toStdString());
		if (!u.is_valid() || u.get_user() != "") {
            ((t_gui *)ui)->cb_show_msg(this, tr("Invalid value for STUN server.").toStdString(),
					MSG_CRITICAL);
			stunServerLineEdit->setFocus();
			stunServerLineEdit->selectAll();
			return;
		}
	}
	
	// Set all values in the user_config object
	// USER
    user_config->set_display(displayLineEdit->text().toStdString());
    user_config->set_name(usernameLineEdit->text().toStdString());
    user_config->set_domain(domainLineEdit->text().toStdString());
    user_config->set_auth_name(authNameLineEdit->text().toStdString());
    user_config->set_auth_pass(authPasswordLineEdit->text().toStdString());
	
	// SIP SERVER
	user_config->set_use_outbound_proxy(!proxyLineEdit->text().isEmpty());
	s = USER_SCHEME;
	s.append(':').append(proxyLineEdit->text());
    user_config->set_outbound_proxy(t_url(s.toStdString()));
	
	// NAT
	user_config->set_use_stun(!stunServerLineEdit->text().isEmpty());
	s = "stun:";
	s.append(stunServerLineEdit->text());
    user_config->set_stun_server(t_url(s.toStdString()));
	
	// Save user config
	string error_msg;
	if (!user_config->write_config(user_config->get_filename(), error_msg)) {
		// Failed to write config file
		((t_gui *)ui)->cb_show_msg(this, error_msg, MSG_CRITICAL);
		return;
	}
	
	emit success();
	accept();
}