#include "InputMapper.h"

#include <memory>

#include <QKeyEvent>

#include "EventManager.h"
#include "PanDirectionChangedEvent.h"

bool InputMapper::handleKeyPress(QKeyEvent* event)
{
    // Auto-repeat says nothing new about which keys are down, and a held action is
    // already held.
    if (event->isAutoRepeat()) { return false; }

    switch (event->key())
    {
    case Qt::Key_A:
        m_panLeftHeld = true;
        updatePanDirection();
        return true;
    case Qt::Key_D:
        m_panRightHeld = true;
        updatePanDirection();
        return true;
    default:
        return false;
    }
}

bool InputMapper::handleKeyRelease(QKeyEvent* event)
{
    if (event->isAutoRepeat()) { return false; }

    switch (event->key())
    {
    case Qt::Key_A:
        m_panLeftHeld = false;
        updatePanDirection();
        return true;
    case Qt::Key_D:
        m_panRightHeld = false;
        updatePanDirection();
        return true;
    default:
        return false;
    }
}

void InputMapper::releaseAll()
{
    m_panLeftHeld  = false;
    m_panRightHeld = false;
    updatePanDirection();
}

void InputMapper::updatePanDirection()
{
    // Holding both keys cancels out rather than favouring one.
    PanDirection direction = PanDirection::None;
    if (m_panLeftHeld != m_panRightHeld)
    {
        direction = m_panLeftHeld ? PanDirection::Left : PanDirection::Right;
    }

    if (direction == m_panDirection) { return; }
    m_panDirection = direction;
    EventManager::getInstance()->sendEventImmediately(
        std::make_shared<PanDirectionChangedEvent>(direction));
}