//========================================================================
// TeapotWars.cpp : source file for the sample 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 "../GCC4/Unix/GameCodeStd.cpp"
#include "Unix/TeapotWars.h"

#include "../GCC4/EventManager/Events.h"
#include "../GCC4/EventManager/EventManagerImpl.h"
// #include "../GCC4/Physics/PhysicsEventListener.h"
#include "../GCC4/LUAScripting/LuaStateManager.h"  // [rez] For debugging only; the view shouldn't use Lua

#include "TeapotWarsView.h"
#include "TeapotEvents.h"

#include <GL/glew.h>
#include <memory>
#include <misc/cpp/imgui_stdlib.h>

extern TeapotWarsApp g_TeaportWarsApp;

//========================================================================
//
// MainMenuUI & MainMenuView implementation
//
//
//========================================================================

#define CID_START_BUTTON				(0)
#define CID_QUIT_BUTTON					(1)


const int g_SampleUIWidth = 600;
const int g_SampleUIHeight = 600;


MainMenuUI::MainMenuUI()
{
	m_bCreatingGame = true;

	m_Levels = g_pApp->GetGameLogic()->GetLevelManager()->GetLevels();
	m_LevelIndex = 0;

	// grab defaults from the game options.
	m_NumAIs = g_pApp->m_Options.m_numAIs;
	m_NumPlayers = g_pApp->m_Options.m_expectedPlayers;
	m_HostName = g_pApp->m_Options.m_gameHost;
	m_HostListenPort = g_pApp->m_Options.m_listenPort;
	m_ClientAttachPort = g_pApp->m_Options.m_listenPort;
}

int MainMenuUI::VOnRestore()
{
	// m_SampleUI.SetLocation( (g_pApp->GetScreenSize().x - g_SampleUIWidth)/2, (g_pApp->GetScreenSize().y - g_SampleUIHeight) / 2  );
	// m_SampleUI.SetSize( g_SampleUIWidth, g_SampleUIHeight );
	// return S_OK;
	return 0;
}

int MainMenuUI::VOnRender(double fTime, float fElapsedTime)
{
	ImGuiIO& io = ImGui::GetIO();

	// don't let title bar change colour when clicked
	ImVec4 titleBgColor = ImGui::GetStyleColorVec4(ImGuiCol_TitleBg);
	ImGui::PushStyleColor(ImGuiCol_TitleBgActive, titleBgColor);

	// maths to centre window on screen
	ImVec2 screenSize = io.DisplaySize;
	ImVec2 screenCenter = ImVec2(screenSize.x * 0.5f, screenSize.y * 0.5f);
	ImGui::SetNextWindowPos(screenCenter, ImGuiCond_Appearing, ImVec2(0.5f, 0.5f));
	 
	// Let's draw a menu! 
	ImGui::Begin("Teapot Wars Main Menu", nullptr, 
		ImGuiWindowFlags_NoMove | 
		ImGuiWindowFlags_NoCollapse | 
		ImGuiWindowFlags_NoResize | 
		ImGuiWindowFlags_AlwaysAutoResize
	);

	ImGui::Text("Level");
	if (ImGui::BeginCombo("##Level", m_Levels[m_LevelIndex].c_str(), 0))
	{
		for (int i = 0; i < m_Levels.size(); i++)
		{
			const bool isSelected = (m_LevelIndex == i);
			if (ImGui::Selectable(m_Levels[i].c_str(), m_LevelIndex == i))
				m_LevelIndex = i;

			// Set the initial focus when opening the combo (scrolling + keyboard navigation focus)
			if (isSelected)
				ImGui::SetItemDefaultFocus();
		}
		ImGui::EndCombo();
	}
	ImGui::Dummy(ImVec2(0.0f, 20.0f));
	
	if (ImGui::RadioButton("Create Game", m_bCreatingGame)) {
		m_bCreatingGame = true;
	}

	ImGui::Text("Number of Players");
	ImGui::SliderInt("##Number of Players", &m_NumPlayers, 1, g_pApp->m_Options.m_maxPlayers);
	ImGui::Dummy(ImVec2(0.0f, 5.0f));
	ImGui::Text("Number of AIs");
	ImGui::SliderInt("##Number of AIs", &m_NumAIs, 0, g_pApp->m_Options.m_maxAIs);
	ImGui::Dummy(ImVec2(0.0f, 20.0f));
	
	if (ImGui::RadioButton("Join Game", !m_bCreatingGame)) {
		m_bCreatingGame = false;
	}
	ImGui::Text("Host Attach Port");
	ImGui::InputText("##Host Attach Port", &m_HostListenPort);
	ImGui::Dummy(ImVec2(0.0f, 5.0f));
	ImGui::Text("Host Name");
	ImGui::InputText("##Host Name", &m_HostName);

	ImGui::Dummy(ImVec2(0.0f, 20.0f));

	if (ImGui::Button("Start Game"))
		_OnGUIEvent(CID_START_BUTTON);
	
	ImGui::SameLine();
	if (ImGui::Button("Quit"))
		_OnGUIEvent(CID_QUIT_BUTTON);

	ImGui::End();

	ImGui::PopStyleColor();

	return 0;
}

int MainMenuUI::VOnMsgProc( SDL_Event &e )
{
	return 0;
}


//--------------------------------------------------------------------------------------
// Handles the GUI events
//--------------------------------------------------------------------------------------
//    Note: pUserContext added to comply with DirectX 9c - June 2005 Update
//
void MainMenuUI::_OnGUIEvent(unsigned int event)
{
	switch (event)
	{
		case CID_START_BUTTON:
		{
			g_pApp->m_Options.m_numAIs = m_NumAIs;
			g_pApp->m_Options.m_expectedPlayers = m_NumPlayers;
			if (m_bCreatingGame)
			{
				if (m_LevelIndex == -1)
				{
					// FUTURE WORK - AN ERROR DIALOG WOULD BE GOOD HERE, OR JUST DEFALT THE SELECTION TO SOMETHING VALID
					return;
				}
				
				g_pApp->m_Options.m_Level = m_Levels[m_LevelIndex];
				g_pApp->m_Options.m_gameHost = "";
				g_pApp->m_Options.m_listenPort = atoi(m_HostListenPort.c_str());
			}
			else
			{
				g_pApp->m_Options.m_gameHost = m_HostName;
				g_pApp->m_Options.m_listenPort = atoi(m_ClientAttachPort.c_str());
			}

			VSetVisible(false);

			std::shared_ptr<EvtData_Request_Start_Game> pRequestStartGameEvent(GCC_NEW EvtData_Request_Start_Game());
			IEventManager::Get()->VQueueEvent(pRequestStartGameEvent);

			break;
		}
		case CID_QUIT_BUTTON:
		{
			break;
		}
	}
}

MainMenuView::MainMenuView() : HumanView(std::shared_ptr<IRenderer>())
{
	// TODO(munnellg) - implement
	m_MainMenuUI.reset(GCC_NEW MainMenuUI); 
	VPushElement(m_MainMenuUI);
}


MainMenuView::~MainMenuView()
{
}


void MainMenuView::VRenderText()
{
	HumanView::VRenderText();
}


void MainMenuView::VOnUpdate(unsigned long deltaMs)
{
	HumanView::VOnUpdate(deltaMs);
}

int MainMenuView::VOnMsgProc( SDL_Event &e )
{
	if (m_MainMenuUI->VIsVisible() )
	{
		if (HumanView::VOnMsgProc(e))
			return 1;
	}
	return 0;
}
//========================================================================
//
// TeapotWarsHumanView Implementation
//
//========================================================================

//
// TeapotWarsHumanView::TeapotWarsHumanView	- Chapter 19, page 724
//
TeapotWarsHumanView::TeapotWarsHumanView(std::shared_ptr<IRenderer> renderer) : HumanView(renderer)
{ 
	m_bShowUI = true; 
    RegisterAllDelegates();
}


TeapotWarsHumanView::~TeapotWarsHumanView() 
{
    RemoveAllDelegates();
}

//
// TeapotWarsHumanView::VOnMsgProc				- Chapter 19, page 727
//
int TeapotWarsHumanView::VOnMsgProc( SDL_Event &e )
{
	if (HumanView::VOnMsgProc(e))
		return 1;

	switch (e.type)
	{
		case SDL_EVENT_KEY_DOWN:
			switch (e.key.scancode)
			{
				case SDL_SCANCODE_F4:
				{
					Resource resource("scripts/test.lua");
					std::shared_ptr<ResHandle> pResourceHandle = g_pApp->m_ResCache->GetHandle(&resource);	// this actually loads the lua file from the zip file
					return 1;
				}
				case SDL_SCANCODE_F5:
				{
					std::shared_ptr<EvtData_ScriptEventTest_ToLua> pEvent(GCC_NEW EvtData_ScriptEventTest_ToLua);
					IEventManager::Get()->VQueueEvent(pEvent);
					return 1;
				}
				// case SDL_SCANCODE_F6:
				// {
				// 	LuaStateManager::Get()->VExecuteString("TestProcess()");
				// 	return 1;
				// }
				case SDL_SCANCODE_F8:
				{
					// m_KeyboardHandler = m_pTeapotController;
					// m_PointerHandler = m_pTeapotController;
					m_pCamera->SetTarget(m_pTeapot);
					// m_pTeapot->SetAlpha(0.8f);
					SDL_SetWindowRelativeMouseMode(g_pApp->GetWindow(), false);
					return 1;
				}
				case SDL_SCANCODE_F11:
				{
					m_KeyboardHandler = m_pFreeCameraController;
					m_PointerHandler = m_pFreeCameraController;
					m_pCamera->ClearTarget();
					// m_pTeapot->SetAlpha(0.8f);
					SDL_SetWindowRelativeMouseMode(g_pApp->GetWindow(), true);
					return 1;
				}
				default:
					break;
			}
		default:
			break;
	}
	return 0;
}

void TeapotWarsHumanView::VRenderText()
{
	// TODO(munnellg) - implement
}

void TeapotWarsHumanView::VOnUpdate(unsigned long deltaMs)
{
	HumanView::VOnUpdate( deltaMs );

	if (m_pFreeCameraController)
	{
		m_pFreeCameraController->OnUpdate(deltaMs);
	}

	// if (m_pTeapotController)
	// {
	// 	m_pTeapotController->OnUpdate(deltaMs);
	// }

	//Send out a tick to listeners
	// std::shared_ptr<EvtData_Update_Tick> pTickEvent(GCC_NEW EvtData_Update_Tick(deltaMs));
	// IEventManager::Get()->VTriggerEvent(pTickEvent);
}

void TeapotWarsHumanView::VOnAttach(GameViewId vid, ActorId aid)
{
	// TODO(munnellg) - implement
}

bool TeapotWarsHumanView::VLoadGameDelegate(TiXmlElement* pLevelData)
{
	if (!HumanView::VLoadGameDelegate(pLevelData))
		return false;

	// m_StandardHUD.reset(GCC_NEW StandardHUD);
	// VPushElement(m_StandardHUD);

	// A movement controller is going to control the camera, 
    // but it could be constructed with any of the objects you see in this
    // function. You can have your very own remote controlled sphere. What fun...
    m_pFreeCameraController.reset(GCC_NEW MovementController(m_pCamera, 0, 0, false));

    m_pScene->VOnRestore();
    return true;
}

void TeapotWarsHumanView::VSetControlledActor(ActorId actorId)
{
	m_pTeapot = static_pointer_cast<SceneNode>(m_pScene->FindActor(actorId));
	if (!m_pTeapot)
	{
		GCC_ERROR("Invalid teapot");
		return;
	}

	HumanView::VSetControlledActor(actorId);

	// m_pTeapotController.reset(GCC_NEW TeapotController(m_pTeapot));
	// m_KeyboardHandler = m_pTeapotController;
	// m_PointerHandler = m_pTeapotController;
	m_pCamera->SetTarget(m_pTeapot);
	// m_pTeapot->SetAlpha(0.8f);
}

void TeapotWarsHumanView::SetControlledActorDelegate(IEventDataPtr pEventData)
{
	std::shared_ptr<EvtData_Set_Controlled_Actor> pCastEventData = static_pointer_cast<EvtData_Set_Controlled_Actor>(pEventData);
	VSetControlledActor(pCastEventData->GetActorId());
}

void TeapotWarsHumanView::RegisterAllDelegates(void)
{
	// TODO(munnellg) - implement

	// [mrmike] Move, New, and Destroy actor events are now handled by the HumanView, as are the PlaySound and GameState events

	IEventManager* pGlobalEventManager = IEventManager::Get();
	// pGlobalEventManager->VAddListener(MakeDelegate(this, &TeapotWarsHumanView::GameplayUiUpdateDelegate), EvtData_Gameplay_UI_Update::sk_EventType);
	pGlobalEventManager->VAddListener(MakeDelegate(this, &TeapotWarsHumanView::SetControlledActorDelegate), EvtData_Set_Controlled_Actor::sk_EventType);
}

void TeapotWarsHumanView::RemoveAllDelegates(void)
{
	// TODO(munnellg) - implement
	IEventManager* pGlobalEventManager = IEventManager::Get();
	// pGlobalEventManager->VRemoveListener(MakeDelegate(this, &TeapotWarsHumanView::GameplayUiUpdateDelegate), EvtData_Gameplay_UI_Update::sk_EventType);
	pGlobalEventManager->VRemoveListener(MakeDelegate(this, &TeapotWarsHumanView::SetControlledActorDelegate), EvtData_Set_Controlled_Actor::sk_EventType);
}