/* Copyright (C) 2009 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. 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 the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * File        : World.cpp
 * Project     : engine
 * Description : Contains the CWorld Class implementation.
 *
 **/
#include "precompiled.h"

#include "graphics/GameView.h"
#include "graphics/LightEnv.h"
#include "graphics/MapReader.h"
#include "graphics/MapWriter.h"
#include "graphics/Terrain.h"
#include "graphics/Terrain.h"
#include "graphics/UnitManager.h"
#include "lib/timer.h"
#include "ps/CLogger.h"
#include "ps/CStr.h"
#include "ps/Errors.h"
#include "ps/Game.h"
#include "ps/GameAttributes.h"
#include "ps/Loader.h"
#include "ps/LoaderThunks.h"
#include "ps/World.h"
#include "renderer/Renderer.h"
#include "simulation/EntityTemplateCollection.h"
#include "simulation/EntityManager.h"
#include "simulation/EntityManager.h"
#include "simulation/LOSManager.h"
#include "simulation/TerritoryManager.h"
#include "simulation/TriggerManager.h"
#include "simulation/Projectile.h"
#include "simulation2/Simulation2.h"

#define LOG_CATEGORY L"world"

/**
 * Global light settings.
 * It is not a member of CWorld because it is passed
 * to the renderer before CWorld exists.
 **/
CLightEnv g_LightEnv;


/**
 * Constructor.
 *
 * @param CGame * pGame pointer to the container game object.
 **/
CWorld::CWorld(CGame *pGame):
	m_pGame(pGame),
	m_Terrain(new CTerrain()),
	m_UnitManager(new CUnitManager()),
	m_EntityManager(new CEntityManager()),
	m_ProjectileManager(new CProjectileManager()),
	m_LOSManager(new CLOSManager()),
	m_TerritoryManager(new CTerritoryManager())
{
}

/**
 * Sets up the game world and loads required world resources.
 *
 * @param CGameAttributes * pGameAttributes pointer to the game attribute values.
 **/
void CWorld::Initialize(CGameAttributes *pAttribs)
{
	// TODO: Find a better way of handling these global things
	ONCE(RegMemFun(CEntityTemplateCollection::GetSingletonPtr(), &CEntityTemplateCollection::LoadTemplates, L"LoadTemplates", 15));

	// Load the map, if one was specified
	if (pAttribs->m_MapFile.length())
	{
		VfsPath mapfilename(VfsPath(L"maps/scenarios/")/(std::wstring)pAttribs->m_MapFile);
		CMapReader* reader = 0;

		try {
			reader = new CMapReader;
			CTriggerManager* pTriggerManager = NULL;
			if (!g_UseSimulation2)
				pTriggerManager = &g_TriggerManager;
			reader->LoadMap(mapfilename, m_Terrain, m_UnitManager, g_Renderer.GetWaterManager(),
				g_Renderer.GetSkyManager(), &g_LightEnv, m_pGame->GetView()->GetCamera(), m_pGame->GetView()->GetCinema(),
				pTriggerManager, m_pGame->GetSimulation2(), m_EntityManager);
				// fails immediately, or registers for delay loading
		} catch (PSERROR_File& err) {
			delete reader;
			LOG(CLogger::Error, LOG_CATEGORY, L"Failed to load map %ls: %hs", mapfilename.string().c_str(), err.what());
			throw PSERROR_Game_World_MapLoadFailed();
		}
	}
}


/**
 * Initializes the game world with the attributes provided.
 *
 * @param CGameAttributes * pGameAttributes pointer to the game attribute values.
 **/
void CWorld::RegisterInit(CGameAttributes *pAttribs)
{
	Initialize(pAttribs);
}


/**
 * Destructor.
 *
 **/
CWorld::~CWorld()
{
	delete m_Terrain;
	delete m_EntityManager;
	delete m_UnitManager; // must come after deleting EntityManager
	delete m_ProjectileManager;
	delete m_LOSManager;
	delete m_TerritoryManager;
}


/**
 * Redraw the world.
 * Provided for JS _rewritemaps function.
 *
 **/
void CWorld::RewriteMap()
{
	CMapWriter::RewriteAllMaps(m_Terrain, m_UnitManager,
		g_Renderer.GetWaterManager(), g_Renderer.GetSkyManager(),
		&g_LightEnv, m_pGame->GetView()->GetCamera(), 
		m_pGame->GetView()->GetCinema(), &g_TriggerManager,
		m_pGame->GetSimulation2(), m_EntityManager);
}