#include "widgets/LongPressSwitchToolButton.h"

#include <QApplication>
#include <QMouseEvent>
#include <QTimer>

#include <algorithm>

LongPressSwitchToolButton::LongPressSwitchToolButton(QWidget* parent)
    : QToolButton(parent) {
    m_timer = new QTimer(this);
    m_timer->setSingleShot(true);
    m_timer->setInterval(m_intervalMs);
    connect(m_timer, &QTimer::timeout, this, [this]() {
        if (!(QApplication::mouseButtons() & Qt::LeftButton)) {
            return;
        }
        m_longPressEmittedForThisPress = true;
        emit longPressTriggered();
    });
}

void LongPressSwitchToolButton::setLongPressInterval(int ms) {
    m_intervalMs = std::max(50, ms);
    if (m_timer) {
        m_timer->setInterval(m_intervalMs);
    }
}

void LongPressSwitchToolButton::mousePressEvent(QMouseEvent* event) {
    if (event->button() == Qt::LeftButton) {
        m_longPressEmittedForThisPress = false;
        m_timer->start();
    }
    QToolButton::mousePressEvent(event);
}

void LongPressSwitchToolButton::mouseReleaseEvent(QMouseEvent* event) {
    const bool left = (event->button() == Qt::LeftButton);
    if (left && m_timer->isActive()) {
        m_timer->stop();
    }
    const bool hadLongPress = left && m_longPressEmittedForThisPress;
    QToolButton::mouseReleaseEvent(event);
    if (hadLongPress) {
        m_longPressEmittedForThisPress = false;
        if (isDown()) {
            setDown(false);
        }
        update();
    }
}