/**

 * vim: set ts=4 sw=4 tw=99 noet :

 * =============================================================================

 * SourceMod

 * Copyright (C) 2004-2008 AlliedModders LLC.  All rights reserved.

 * =============================================================================

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License, version 3.0, 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 the GNU General Public License for more

 * details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 * As a special exception, AlliedModders LLC gives you permission to link the

 * code of this program (as well as its derivative works) to "Half-Life 2," the

 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software

 * by the Valve Corporation.  You must obey the GNU General Public License in

 * all respects for all other code used.  Additionally, AlliedModders LLC grants

 * this exception to all derivative works.  AlliedModders LLC defines further

 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),

 * or <http://www.sourcemod.net/license.php>.

 *

 * Version: $Id$

 */

#ifndef _INCLUDE_SOURCEMOD_SHARESYSTEM_H_

#define _INCLUDE_SOURCEMOD_SHARESYSTEM_H_

#include <IShareSys.h>

#include <IHandleSys.h>

#include <sh_list.h>

#include <sm_stringhashmap.h>

#include <sm_namehashset.h>

#include "common_logic.h"

using namespace SourceHook;

namespace SourceMod

{

	struct IdentityToken_t

	{

		Handle_t ident;

		void *ptr;

		IdentityType_t type;

	};

};

struct IfaceInfo

{

	bool operator ==(const IfaceInfo &info)

	{

		return (info.iface == iface && info.owner == owner);

	}

	SMInterface *iface;

	IExtension *owner;

};

class CNativeOwner;

struct NativeEntry;

class CPlugin;

struct ReplaceNative

{

	CNativeOwner *owner;

	SPVM_NATIVE_FUNC func;

};

struct FakeNative

{

	char name[64];

	IPluginContext *ctx;

	IPluginFunction *call;

};

struct NativeEntry

{

	CNativeOwner *owner;

	SPVM_NATIVE_FUNC func;

	const char *name;

	ReplaceNative replacement;

	FakeNative *fake;

	static inline bool matches(const char *name, const NativeEntry *entry)

	{

		return strcmp(name, entry->name) == 0;

	}

};

struct Capability

{

	IExtension *ext;

	IFeatureProvider *provider;

};

class ShareSystem :

	public IShareSys,

	public SMGlobalClass,

	public IHandleTypeDispatch

{

	friend class CNativeOwner;

public:

	ShareSystem();

public: //IShareSys

	bool AddInterface(IExtension *myself, SMInterface *pIface);

	bool RequestInterface(const char *iface_name, 

		unsigned int iface_vers,

		IExtension *myself,

		SMInterface **pIface);

	void AddNatives(IExtension *myself, const sp_nativeinfo_t *natives);

	IdentityType_t CreateIdentType(const char *name);

	IdentityType_t FindIdentType(const char *name);

	IdentityToken_t *CreateIdentity(IdentityType_t type, void *ptr);

	void DestroyIdentType(IdentityType_t type);

	void DestroyIdentity(IdentityToken_t *identity);

	void AddDependency(IExtension *myself, const char *filename, bool require, bool autoload);

	void RegisterLibrary(IExtension *myself, const char *name);

	void OverrideNatives(IExtension *myself, const sp_nativeinfo_t *natives);

	void AddCapabilityProvider(IExtension *myself, IFeatureProvider *provider,

		                       const char *name);

	void DropCapabilityProvider(IExtension *myself, IFeatureProvider *provider,

		                        const char *name);

public: //SMGlobalClass

	/* Pre-empt in case anything tries to register idents early */

	void Initialize();

	void OnSourceModShutdown();

public: //IHandleTypeDispatch

	void OnHandleDestroy(HandleType_t type, void *object);

public:

	IdentityToken_t *CreateCoreIdentity();

	void RemoveInterfaces(IExtension *pExtension);

	FeatureStatus TestFeature(IPluginRuntime *pRuntime, FeatureType feature, const char *name);

	FeatureStatus TestNative(IPluginRuntime *pRuntime, const char *name);

	FeatureStatus TestCap(const char *name);

public:

	inline IdentityToken_t *GetIdentRoot()

	{

		return &m_IdentRoot;

	}

public:

	void BindNativesToPlugin(CPlugin *pPlugin, bool bCoreOnly);

	void BindNativeToPlugin(CPlugin *pPlugin, NativeEntry *pEntry);

	NativeEntry *AddFakeNative(IPluginFunction *pFunc, const char *name, SPVM_FAKENATIVE_FUNC func);

	NativeEntry *FindNative(const char *name);

private:

	NativeEntry *AddNativeToCache(CNativeOwner *pOwner, const sp_nativeinfo_t *ntv);

	void ClearNativeFromCache(CNativeOwner *pOwner, const char *name);

	void BindNativeToPlugin(CPlugin *pPlugin, 

		sp_native_t *ntv, 

		uint32_t index, 

		NativeEntry *pEntry);

private:

	List<IfaceInfo> m_Interfaces;

	HandleType_t m_TypeRoot;

	IdentityToken_t m_IdentRoot;

	HandleType_t m_IfaceType;

	IdentityType_t m_CoreType;

	NameHashSet<NativeEntry *> m_NtvCache;

	StringHashMap<Capability> m_caps;

};

extern ShareSystem g_ShareSys;

#endif //_INCLUDE_SOURCEMOD_SHARESYSTEM_H_