/* Copyright (C) 2012 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/>.
 */

#include "precompiled.h"

#include "simulation2/system/Component.h"
#include "ICmpVision.h"

#include "simulation2/MessageTypes.h"
#include "simulation2/components/ICmpOwnership.h"
#include "simulation2/components/ICmpPlayerManager.h"
#include "simulation2/components/ICmpTechnologyManager.h"

class CCmpVision : public ICmpVision
{
public:
	static void ClassInit(CComponentManager& componentManager)
	{
		componentManager.SubscribeGloballyToMessageType(MT_TechnologyModification);
	}

	DEFAULT_COMPONENT_ALLOCATOR(Vision)

	// Template state:

	entity_pos_t m_Range, m_BaseRange;
	bool m_RetainInFog;
	bool m_AlwaysVisible;

	static std::string GetSchema()
	{
		return
			"<element name='Range'>"
				"<data type='nonNegativeInteger'/>"
			"</element>"
			"<element name='RetainInFog'>"
				"<data type='boolean'/>"
			"</element>"
			"<element name='AlwaysVisible'>"
				"<data type='boolean'/>"
			"</element>";
	}

	virtual void Init(const CParamNode& paramNode)
	{
		m_BaseRange = m_Range = paramNode.GetChild("Range").ToFixed();
		m_RetainInFog = paramNode.GetChild("RetainInFog").ToBool();
		m_AlwaysVisible = paramNode.GetChild("AlwaysVisible").ToBool();
	}

	virtual void Deinit()
	{
	}

	virtual void Serialize(ISerializer& UNUSED(serialize))
	{
		// No dynamic state to serialize
	}

	virtual void Deserialize(const CParamNode& paramNode, IDeserializer& UNUSED(deserialize))
	{
		Init(paramNode);
	}

	virtual void HandleMessage(const CMessage& msg, bool UNUSED(global))
	{
		switch (msg.GetType())
		{
		case MT_TechnologyModification:
		{
			const CMessageTechnologyModification& msgData = static_cast<const CMessageTechnologyModification&> (msg);
			if (msgData.component == L"Vision")
			{
				CmpPtr<ICmpOwnership> cmpOwnership(GetSimContext(), GetEntityId());
				if (cmpOwnership)
				{
					player_id_t owner = cmpOwnership->GetOwner();
					if (owner != INVALID_PLAYER && owner == msgData.player)
					{
						CmpPtr<ICmpPlayerManager> cmpPlayerManager(GetSimContext(), SYSTEM_ENTITY);
						entity_id_t playerEnt = cmpPlayerManager->GetPlayerByID(owner);
						CmpPtr<ICmpTechnologyManager> cmpTechnologyManager(GetSimContext(), playerEnt);
						if (playerEnt != INVALID_ENTITY && cmpTechnologyManager)
						{
							entity_pos_t newRange = cmpTechnologyManager->ApplyModifications(L"Vision/Range", m_BaseRange, GetEntityId());
							if (newRange != m_Range)
							{
								// Update our vision range and broadcast message
								entity_pos_t oldRange = m_Range;
								m_Range = newRange;
								CMessageVisionRangeChanged msg(GetEntityId(), oldRange, newRange);
								GetSimContext().GetComponentManager().BroadcastMessage(msg);
							}
						}
					}
				}
			}
			break;
		}
		}
	}

	virtual entity_pos_t GetRange()
	{
		return m_Range;
	}

	virtual bool GetRetainInFog()
	{
		return m_RetainInFog;
	}

	virtual bool GetAlwaysVisible()
	{
		return m_AlwaysVisible;
	}
};

REGISTER_COMPONENT_TYPE(Vision)
