// mainwindow.cpp - tabs CONTROLLER 1..3 and the selected controller (see mainwindow.h)

#include "mainwindow.h"

#include "deviceview.h"
#include "panelwidget.h"
#include "style.h"
#include "tabbar.h"

#include <QApplication>
#include <QHBoxLayout>
#include <QKeyEvent>
#include <QStackedWidget>
#include <QVBoxLayout>

MainWindow::MainWindow(const QStringList &ports, int baudRate, QWidget *parent)
    : QWidget(parent)
{
    setWindowTitle(QStringLiteral("AdvancedController - virtual front panel"));
    resize(980, 730);
    setMinimumSize(660, 480);
    QPalette windowPalette = palette();
    windowPalette.setColor(QPalette::Window, Style::Background);
    windowPalette.setColor(QPalette::WindowText, Style::Text);
    setPalette(windowPalette);
    setAutoFillBackground(true);

    // --- tabs CONTROLLER 1..3 ---
    m_tabs = new TabBar(Devices, this);
    auto *tabsBox = new QHBoxLayout;
    tabsBox->setContentsMargins(8, 8, 8, 0);
    tabsBox->addWidget(m_tabs);

    // --- one device block per tab; only the selected one is shown, all keep working ---
    m_stack = new QStackedWidget(this);
    for (int i = 0; i < Devices; ++i) {
        auto *device = new DeviceView(i, baudRate, i < ports.size() ? ports.at(i) : QString(), m_stack);
        connect(device, &DeviceView::stateChanged, m_tabs, &TabBar::setState);
        m_stack->addWidget(device);
        m_devices.append(device);
    }

    auto *root = new QVBoxLayout(this);
    root->setContentsMargins(0, 0, 0, 0);
    root->setSpacing(0);
    root->addLayout(tabsBox);
    root->addWidget(m_stack, 1);

    connect(m_tabs, &TabBar::selected, this, &MainWindow::select);
    select(0);

    qApp->installEventFilter(this);                 // PC keyboard = cross pad
}

MainWindow::~MainWindow()
{
    qApp->removeEventFilter(this);
}

void MainWindow::select(int index)
{
    m_stack->setCurrentIndex(index);
    m_tabs->setActive(index);
}

bool MainWindow::eventFilter(QObject *watched, QEvent *event)
{
    const bool keyEvent = event->type() == QEvent::KeyPress || event->type() == QEvent::KeyRelease;
    if (keyEvent && isActiveWindow() && !QApplication::activePopupWidget()) {
        auto *key = static_cast<QKeyEvent *>(event);
        QString button;
        switch (key->key()) {
        case Qt::Key_Up:     button = QStringLiteral("UP"); break;
        case Qt::Key_Down:   button = QStringLiteral("DOWN"); break;
        case Qt::Key_Left:   button = QStringLiteral("LEFT"); break;
        case Qt::Key_Right:  button = QStringLiteral("RIGHT"); break;
        case Qt::Key_Return: button = QStringLiteral("ENTER"); break;
        default: break;
        }
        if (!button.isEmpty()) {
            if (!key->isAutoRepeat()) {                 // ignore the key auto-repeat
                PanelWidget *panel = m_devices.at(m_stack->currentIndex())->panel();
                if (event->type() == QEvent::KeyPress)
                    panel->press(button);
                else
                    panel->release(button);
            }
            return true;
        }
    }
    return QWidget::eventFilter(watched, event);
}