#include "fs/devices/KeyboardDevice.h"

SharedPtr<KeyboardDevice> KeyboardDevice::s_keyboard_device = {};

Result<void> KeyboardDevice::create()
{
    auto device = TRY(make_shared<KeyboardDevice>());
    s_keyboard_device = device;
    return DeviceRegistry::register_special_device(DeviceRegistry::Input, 1, device, 0600);
}

Result<usize> KeyboardDevice::read(u8* buf, usize, usize length) const
{
    length = m_packet_buffer.dequeue_data(buf, length);

    return length;
}

Result<usize> KeyboardDevice::write(const u8* buf, usize, usize length)
{
    TRY(m_packet_buffer.append_data(buf, length));

    return length;
}

void KeyboardDevice::add_keyboard_event(const moon::KeyboardPacket& packet)
{
    if (s_keyboard_device) s_keyboard_device->write((const u8*)&packet, 0, sizeof(packet));
}

bool KeyboardDevice::will_block_if_read() const
{
    return !m_packet_buffer.size();
}