//========================================================================
// HumanView.cpp - Implements the class HumanView, which provides a Human interface into the game
//
// Part of the GameCode4 Application
//
// GameCode4 is the sample application that encapsulates much of the source code
// discussed in "Game Coding Complete - 4th Edition" by Mike McShaffry and David
// "Rez" Graham, published by Charles River Media. 
// ISBN-10: 1133776574 | ISBN-13: 978-1133776574
//
// If this source code has found it's way to you, and you think it has helped you
// in any way, do the authors a favor and buy a new copy of the book - there are 
// detailed explanations in it that compliment this code well. Buy a copy at Amazon.com
// by clicking here: 
//    http://www.amazon.com/gp/product/1133776574/ref=olp_product_details?ie=UTF8&me=&seller=
//
// There's a companion web site at http://www.mcshaffry.com/GameCode/
// 
// The source code is managed and maintained through Google Code: 
//    http://code.google.com/p/gamecode4/
//
// (c) Copyright 2012 Michael L. McShaffry and David Graham
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser GPL v3
// as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See 
// http://www.gnu.org/licenses/lgpl-3.0.txt for more details.
//
// You should have received a copy of the GNU Lesser GPL v3
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
//========================================================================

#include "../Unix/GameCodeStd.h"
#include "HumanView.h"

#include "../EventManager/Events.h"
#include "../EventManager/EventManagerImpl.h"

const GameViewId gc_InvalidGameViewId = 0xffffffff;

//
// HumanView::HumanView - Chapter 10, page 272
//
HumanView::HumanView(std::shared_ptr<IRenderer> renderer)
{
	// TODO(munnellg) - implement
	// InitAudio()

	// m_pProcessManager = GCC_NEW ProcessManager;

	m_PointerRadius = 1;	// we assume we are on a mouse enabled machine - if this were a tablet we should detect it here.
	m_ViewId = gc_InvalidGameViewId;

	// Added post press for move, new, and destroy actor events and others
	RegisterAllDelegates();
	m_BaseGameState = BGS_Initializing;		// what is the current game state

	if (renderer)
	{
		// Moved to the HumanView class post press
		m_pScene.reset(GCC_NEW ScreenElementScene(renderer));

		Frustum frustum;
		frustum.Init(GCC_PI/4.0f, 1.0f, 0.1f, 100.0f);
		m_pCamera.reset(GCC_NEW CameraNode(glm::mat4(1.0f), frustum));
		GCC_ASSERT(m_pScene && m_pCamera && "Out of memory");

		m_pScene->VAddChild(INVALID_ACTOR_ID, m_pCamera);
		m_pScene->SetCamera(m_pCamera);
	}
}


HumanView::~HumanView()
{
	// TODO(munnellg) - implement
	// [mrmike] - RemoveAllDelegates was added post press to handle move, new, and destroy actor events.
	RemoveAllDelegates();

	while (!m_ScreenElements.empty())
	{
		m_ScreenElements.pop_front();		
	}

	// SAFE_DELETE(m_pProcessManager);

	// SAFE_DELETE(g_pAudio);
}

bool HumanView::LoadGame(TiXmlElement* pLevelData)
{
    // call the delegate method
    return VLoadGameDelegate(pLevelData);
}

//
// HumanView::VOnRender							- Chapter 10, page 274
//
void HumanView::VOnRender(double fTime, float fElapsedTime )
{
	for (ScreenElementList::iterator i=m_ScreenElements.begin(); i!=m_ScreenElements.end(); ++i)
	{
		if ( (*i)->VIsVisible() )
		{
			( (*i)->VOnRender(fTime, fElapsedTime));
		}
	}

	VRenderText();

	// TODO(munnellg) - implement the console
	// Let the console render
	// m_Console.Render()
}


//
// HumanView::VOnRestore						- Chapter 10, page 275
//
int HumanView::VOnRestore()
{
	for(ScreenElementList::iterator i=m_ScreenElements.begin(); i!=m_ScreenElements.end(); ++i)
	{
		if ( (*i)->VOnRestore() != 0)
			return 1;
	}
	return 0;
}



//
// HumanView::VOnMsgProc						- Chapter 10, page 279
//
int HumanView::VOnMsgProc( SDL_Event &e )
{
	// Iterate through the screen layers first
	// In reverse order since we'll send input messages to the 
	// screen on top
	for(ScreenElementList::reverse_iterator i=m_ScreenElements.rbegin(); i!=m_ScreenElements.rend(); ++i)
	{
		if ( (*i)->VIsVisible() )
		{
			if ( (*i)->VOnMsgProc( e ) )
			{
				return 1;
			}
		}
	}

	int result = 0;
	switch (e.type)
	{
		case SDL_EVENT_KEY_DOWN:
			if (m_KeyboardHandler)
			{
				result = m_KeyboardHandler->VOnKeyDown(e.key.scancode);
			}
			break;
		case SDL_EVENT_KEY_UP:
			if (m_KeyboardHandler)
			{
				result = m_KeyboardHandler->VOnKeyUp(e.key.scancode);
			}
			break;
		case SDL_EVENT_MOUSE_MOTION:
			if (m_PointerHandler)
				result = m_PointerHandler->VOnPointerMove(Point((int) e.motion.x, (int) e.motion.y), 1);
			break;
		case SDL_EVENT_MOUSE_BUTTON_DOWN:
		case SDL_EVENT_MOUSE_BUTTON_UP:
			break;
	}

	return 0;
}

//
// HumanView::VOnRestore						- Chapter 10, page 277
//
void HumanView::VOnUpdate(const int deltaMilliseconds)
{
	// TODO(munnellg) - implement
}

//
// HumanView::VPushElement						- Chapter 10, page 274
//
void HumanView::VPushElement(std::shared_ptr<IScreenElement> pElement)
{
	m_ScreenElements.push_front(pElement);
}

//
// HumanView::VPopElement						- Chapter 10, page 274
//
//   
//
void HumanView::VRemoveElement(std::shared_ptr<IScreenElement> pElement)
{
	m_ScreenElements.remove(pElement);
}



//
// HumanView::RegisterAllDelegates, HumanView::RemoveAllDelegates		- not described in the book
//
//   Aggregates calls to manage event listeners for the HumanView class.
//
void HumanView::RegisterAllDelegates(void)
{
	IEventManager* pGlobalEventManager = IEventManager::Get();
	// pGlobalEventManager->VAddListener(MakeDelegate(this, &HumanView::GameStateDelegate), EvtData_Game_State::sk_EventType);
	pGlobalEventManager->VAddListener(MakeDelegate(this, &HumanView::PlaySoundDelegate), EvtData_PlaySound::sk_EventType);
}

void HumanView::RemoveAllDelegates(void)
{
	IEventManager* pGlobalEventManager = IEventManager::Get();
	// pGlobalEventManager->VRemoveListener(MakeDelegate(this, &HumanView::GameStateDelegate), EvtData_Game_State::sk_EventType);
	pGlobalEventManager->VRemoveListener(MakeDelegate(this, &HumanView::PlaySoundDelegate), EvtData_PlaySound::sk_EventType);
}

//
// HumanView::PlaySoundDelegate							- Chapter X, page Y
//
void HumanView::PlaySoundDelegate(IEventDataPtr pEventData)
{
	// shared_ptr<EvtData_PlaySound> pCastEventData = static_pointer_cast<EvtData_PlaySound>(pEventData);

	// play the sound a bullet makes when it hits a teapot
	// Resource resource(pCastEventData->GetResource().c_str());
	// shared_ptr<ResHandle> srh = static_pointer_cast<ResHandle>(g_pApp->m_ResCache->GetHandle(&resource));
	// shared_ptr<SoundProcess> sfx(GCC_NEW SoundProcess(srh, 100, false));
	// m_pProcessManager->AttachProcess(sfx);
}