/* === This file is part of Calamares - <http://github.com/calamares> ===
 *
 *   Copyright 2014, Teo Mrnjavac <teo@kde.org>
 *
 *   Portions from the Manjaro Installation Framework
 *   by Roland Singer <roland@manjaro.org>
 *   Copyright (C) 2007 Free Software Foundation, Inc.
 *
 *   Calamares 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 3 of the License, or
 *   (at your option) any later version.
 *
 *   Calamares 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 Calamares. If not, see <http://www.gnu.org/licenses/>.
 */

#include "UsersPage.h"
#include "ui_page_usersetup.h"

#include <QBoxLayout>
#include <QLabel>
#include <QLineEdit>
#include <QRegExp>
#include <QRegExpValidator>



UsersPage::UsersPage( QWidget* parent )
    : QWidget( parent )
    , ui( new Ui::Page_UserSetup )
    , m_readyUsername( false )
    , m_readyHostname( false )
    , m_readyPassword( false )
    , m_readyRootPassword( false )
{
    ui->setupUi( this );

    // Connect signals and slots
    connect( ui->textBoxUsername, &QLineEdit::textChanged,
             this, &UsersPage::onUsernameTextChanged );
    connect( ui->textBoxHostname, &QLineEdit::textChanged,
             this, &UsersPage::onHostnameTextChanged );
    connect( ui->textBoxUserPassword, &QLineEdit::textChanged,
             this, &UsersPage::onPasswordTextChanged );
    connect( ui->textBoxUserVerifiedPassword, &QLineEdit::textChanged,
             this, &UsersPage::onPasswordTextChanged );
    connect( ui->textBoxRootPassword, &QLineEdit::textChanged,
             this, &UsersPage::onRootPasswordTextChanged );
    connect( ui->textBoxVerifiedRootPassword, &QLineEdit::textChanged,
             this, &UsersPage::onRootPasswordTextChanged );
}


UsersPage::~UsersPage()
{
    delete ui;
}


bool
UsersPage::isReady()
{
    return m_readyHostname && m_readyPassword && m_readyRootPassword && m_readyUsername;
}


void
UsersPage::onUsernameTextChanged( const QString& textRef )
{
    QString text = textRef;
    QRegExp rx( "^[a-z][-a-z0-9_]*\\$" );
    QRegExpValidator val( rx );
    int pos = -1;

    if ( text.isEmpty() )
    {
        ui->labelUsernameError->clear();
        ui->labelUsername->clear();
        m_readyUsername = false;
    }
    else if ( val.validate( text, pos ) == QValidator::Invalid )
    {
        ui->labelUsername->setPixmap( QPixmap( ":/images/invalid.png" ) );
        --pos;

        if ( pos >= 0 && pos < text.size() )
            ui->labelUsernameError->setText(
                tr( "Your username contains an invalid character '%1'" )
                    .arg( text.at( pos ) ) );
        else
            ui->labelUsernameError->setText(
                tr( "Your username contains invalid characters!" ) );

        m_readyUsername = false;
    }
    else {
        ui->labelUsername->setPixmap( QPixmap( ":/images/valid.png" ) );
        ui->labelUsernameError->clear();
        m_readyUsername = true;
    }

    emit checkReady( isReady() );
}


void
UsersPage::onHostnameTextChanged( const QString& textRef )
{
    QString text = textRef;
    QRegExp rx( "^[a-zA-Z][-a-zA-Z0-9_]*\\$" );
    QRegExpValidator val( rx );
    int pos = -1;

    if ( text.isEmpty() )
    {
        ui->labelHostnameError->clear();
        ui->labelHostname->clear();
        m_readyHostname= false;
    }
    else if ( val.validate( text, pos ) == QValidator::Invalid )
    {
        ui->labelHostname->setPixmap( QPixmap( ":/images/invalid.png" ) );
        --pos;

        if ( pos >= 0 && pos < text.size() )
            ui->labelHostnameError->setText(
                tr( "Your username contains an invalid character '%1'" )
                    .arg( text.at( pos ) ) );
        else
            ui->labelHostnameError->setText(
                tr( "Your username contains invalid characters!" ) );

        m_readyHostname = false;
    }
    else
    {
        ui->labelHostname->setPixmap( QPixmap( ":/images/valid.png" ) );
        ui->labelHostnameError->clear();
        m_readyHostname = true;
    }

    emit checkReady( isReady() );
}


void
UsersPage::onPasswordTextChanged( const QString& )
{
    QString pw1 = ui->textBoxUserPassword->text();
    QString pw2 = ui->textBoxUserVerifiedPassword->text();

    if ( pw1.isEmpty() && pw2.isEmpty() )
    {
        ui->labelUserPasswordError->clear();
        ui->labelUserPassword->clear();
        m_readyPassword = false;
    }
    else if ( pw1 != pw2 )
    {
        ui->labelUserPasswordError->setText( tr( "Your passwords do not match!" ) );
        ui->labelUserPassword->setPixmap( QPixmap( ":/images/invalid.png" ) );
        m_readyPassword = false;
    }
    else
    {
        ui->labelUserPasswordError->clear();
        ui->labelUserPassword->setPixmap( QPixmap( ":/images/valid.png" ) );
        m_readyPassword = true;
    }

    emit checkReady( isReady() );
}


void
UsersPage::onRootPasswordTextChanged( const QString& )
{
    QString pw1 = ui->textBoxRootPassword->text();
    QString pw2 = ui->textBoxVerifiedRootPassword->text();

    if ( pw1.isEmpty() && pw2.isEmpty() )
    {
        ui->labelRootPasswordError->clear();
        ui->labelRootPassword->clear();
        m_readyRootPassword = false;
    }
    else if ( pw1 != pw2 )
    {
        ui->labelRootPasswordError->setText( tr( "Your passwords do not match!" ) );
        ui->labelRootPassword->setPixmap( QPixmap( ":/images/invalid.png" ) );
        m_readyRootPassword = false;
    }
    else
    {
        ui->labelRootPasswordError->clear();
        ui->labelRootPassword->setPixmap( QPixmap( ":/images/valid.png" ) );
        m_readyRootPassword = true;
    }

    emit checkReady( isReady() );
}