#include "ihumandevice.h"
#include "tier1/interface.h"
#include "tier1/utlvector.h"

class CHumanDeviceManager: public IHumanDeviceManager
{
public:
	virtual void Frame() override;

	virtual void SetDefaultInput( IHumanDeviceInput *pInput ) override;
	virtual void PushInput( IHumanDeviceInput *pInput ) override;
	virtual void PopInput() override;
	virtual IHumanDeviceInput *GetCurrentInput() override;

	virtual void SetButtonPressed( EInputButton eButton ) override;
	virtual void SetButtonUnpressed( EInputButton eButton ) override;

	virtual void WriteUTF8( uint32_t uCode ) override;

	bool m_abIsButtonPressed[k_EInputButton_Count] = {};
	bool m_abWasButtonPressed[k_EInputButton_Count] = {};
	CUtlVector<IHumanDeviceInput*> m_apInputStack;
	IHumanDeviceInput *m_pDefaultInput;
};

CHumanDeviceManager s_manager;
IHumanDeviceManager *g_pHumanDeviceManager = &s_manager;

void CHumanDeviceManager::Frame()
{
	IHumanDeviceInput *pInput = GetCurrentInput();
	if (pInput)
	{
		for ( int i = 0; i < k_EInputButton_Count; i++ )
		{
			if (m_abIsButtonPressed[i] == m_abWasButtonPressed[i])
				continue;
			pInput->OnGameButton(k_EInputDevice_Keyboard, 
					(EInputButton)i, m_abIsButtonPressed[i]);
		}
	}
	V_memcpy(m_abWasButtonPressed, m_abIsButtonPressed, sizeof(m_abIsButtonPressed));
}


void CHumanDeviceManager::SetDefaultInput( IHumanDeviceInput *pInput )
{
	m_pDefaultInput = pInput;
}

void CHumanDeviceManager::PushInput( IHumanDeviceInput *pInput )
{
	m_apInputStack.AppendTail(pInput);
}

void CHumanDeviceManager::PopInput()
{
	m_apInputStack.RemoveTail();
}

IHumanDeviceInput *CHumanDeviceManager::GetCurrentInput()
{
	if (m_apInputStack.GetSize() == 0)
		return m_pDefaultInput;
	return m_apInputStack[m_apInputStack.GetSize()-1];
}


void CHumanDeviceManager::SetButtonPressed( EInputButton eButton )
{
	m_abIsButtonPressed[eButton] = true;
	IHumanDeviceInput *pInput = GetCurrentInput();
	if (pInput)
		pInput->OnButton(k_EInputDevice_Keyboard, eButton, true);
	
}

void CHumanDeviceManager::SetButtonUnpressed( EInputButton eButton )
{
	m_abIsButtonPressed[eButton] = false;
	IHumanDeviceInput *pInput = GetCurrentInput();
	if (pInput)
		pInput->OnButton(k_EInputDevice_Keyboard, eButton, false);
}

void CHumanDeviceManager::WriteUTF8( uint32_t uCode )
{

}



EXPOSE_INTERFACE_GLOBALVAR(CHumanDeviceManager, IHumanDeviceManager, HUMAN_DEVICE_MANAGER_INTERFACE_VERSION, g_pHumanDeviceManager)