#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QFile>
#include <QTime>
#include <QStyle>

#include <QDebug>
#include <QKeyEvent>
#include <QLineEdit>

class QNetworkReply;
namespace shutdown2 {

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    setFixedSize(size());
#if defined(Q_OS_WIN)
    setWindowFlags(windowFlags() | Qt::MSWindowsFixedSizeDialogHint);
#endif

    mSettings = new QSettings(QSettings::IniFormat, QSettings::UserScope, "RogoSoftware", "shutdown2");

    restoreGeometry(mSettings->value("geometry", saveGeometry()).toByteArray());
    move(mSettings->value("pos", pos()).toPoint());

    QFile css(":style.css");
    if (css.open(QFile::ReadOnly | QFile::Text))
        mCss = css.readAll();
    setStyleSheet(mCss);

    // init timers
    QApplication::setEffectEnabled(Qt::UI_AnimateCombo, false);
    ui->cb_timers->setValidator(new QIntValidator(0, 99999, this));
    ui->cb_timers->setAutoCompletion(false);
    ui->cb_timers->lineEdit()->setAlignment(Qt::AlignRight);
    ui->cb_timers->addItem("0");
    ui->cb_timers->addItem("11");
    ui->cb_timers->addItem("22");
    ui->cb_timers->addItem("30");
    ui->cb_timers->addItem("45");
    ui->cb_timers->addItem("60");
    ui->cb_timers->addItem("90");
    ui->cb_timers->addItem("120");
    ui->cb_timers->addItem("240");
    ui->cb_timers->installEventFilter(this);

    // init state machine
    initStateMachine();
    connect(&mTimer, &QTimer::timeout, this, &MainWindow::updateTime);
}

MainWindow::~MainWindow()
{
    delete ui;
    delete mSettings;
}

void MainWindow::initStateMachine()
{
    // states
    QState* on = new QState();
    on->assignProperty(ui->btn_startstop, "on", false);
    on->assignProperty(ui->lbl_timer, "on", false);
    on->assignProperty(ui->btn_startstop, "text", "Stop");

    QState* off = new QState();
    off->assignProperty(ui->btn_startstop, "on", true);
    off->assignProperty(ui->lbl_timer, "on", true);
    off->assignProperty(ui->btn_startstop, "text", "Start");

    // transistions
    on->addTransition(ui->btn_startstop, SIGNAL(clicked()), off);
    off->addTransition(ui->btn_startstop, SIGNAL(clicked()), on);

    // init
    mStateMachine.addState(on);
    mStateMachine.addState(off);
    mStateMachine.setInitialState(off);
    mStateMachine.start();
}

void MainWindow::on_btn_startstop_clicked()
{
    timerToggled();
    setStyleSheet(mCss);
}

void MainWindow::shutdown()
{
    system("shutdown -s -f -t 0");
}

void MainWindow::updateTime()
{
    if (mTimeLeft == 0) {
        ui->lbl_timer->setText("0:00:00");
        shutdown();
        mTimer.stop();
        return;
    }

    QString h = QString::number(mTimeLeft / 3600);
    QString m = QString::number((mTimeLeft / 60) % 60);
    QString s = QString::number(mTimeLeft % 60);

    if (s.length() == 1) s = "0" + s;
    if (m.length() == 1) m = "0" + m;

    ui->lbl_timer->setText(h + ":" + m + ":" + s);
    mTimeLeft--;
}

void MainWindow::timerToggled() {

    if (ui->btn_startstop->property("on").toBool()) {
        int time = ui->cb_timers->currentText().toInt();
        time *= 60; // convert to seconds
        mTimeLeft = time;
        updateTime();
        mTimer.start(1000);
        ui->stackedWidget->setCurrentIndex(1);
        ui->btn_startstop->setFocus();

    } else {
        mTimeLeft = -1;
        mTimer.stop();
        ui->lbl_timer->setText("--:--:--");
        ui->stackedWidget->setCurrentIndex(0);
        ui->cb_timers->setFocus();
    }
}

void MainWindow::keyPressEvent(QKeyEvent *e)
{
    if (e->key() == Qt::Key_Enter || e->key() == Qt::Key_Return) {
        ui->btn_startstop->click(); // this is needed this way to trigger statemachine transition
        e->accept();
    }
}

bool MainWindow::eventFilter(QObject *watched, QEvent *e)
{
    if (e->type() == QEvent::KeyPress) {
        if (QKeyEvent* ke = dynamic_cast<QKeyEvent*>(e)) {
            if (ke->key() == Qt::Key_Space) {
                ui->btn_startstop->click(); // this is needed this way to trigger statemachine transition
                e->accept();
                return true;
            }
        }
    }
    return QObject::eventFilter(watched, e);
}

}