/**

 * vim: set ts=4 :

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

 * SourceMod

 * Copyright (C) 2004-2007 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_EXTENSION_SYSTEM_H_

#define _INCLUDE_SOURCEMOD_EXTENSION_SYSTEM_H_

#include <IExtensionSys.h>

#include <ILibrarySys.h>

#include <sh_list.h>

#include <sh_string.h>

#include "sm_globals.h"

#include "ShareSys.h"

#include <ISmmAPI.h>

#include <IPluginSys.h>

#include <IRootConsoleMenu.h>

#include "PluginSys.h"

using namespace SourceMod;

using namespace SourceHook;

class CExtension : public IExtension

{

	friend class CExtensionManager;

public:

	CExtension(const char *filename, char *error, size_t maxlen);

	~CExtension();

public: //IExtension

	IExtensionInterface *GetAPI();

	const char *GetFilename();

	IdentityToken_t *GetIdentity();

	bool IsLoaded();

	ITERATOR *FindFirstDependency(IExtension **pOwner, SMInterface **pInterface);

	bool FindNextDependency(ITERATOR *iter, IExtension **pOwner, SMInterface **pInterface);

	void FreeDependencyIterator(ITERATOR *iter);

	bool IsRunning(char *error, size_t maxlength);

public:

	void SetError(const char *error);

	void AddDependency(IfaceInfo *pInfo);

	void AddChildDependent(CExtension *pOther, SMInterface *iface);

	void AddInterface(SMInterface *pInterface);

	void AddPlugin(IPlugin *pPlugin);

	void RemovePlugin(IPlugin *pPlugin);

	void MarkAllLoaded();

private:

	bool Load(char *error, size_t maxlength);

private:

	IdentityToken_t *m_pIdentToken;

	IExtensionInterface *m_pAPI;

	String m_File;

	String m_Path;

	ILibrary *m_pLib;

	String m_Error;

	List<IfaceInfo> m_Deps;			/** Dependencies */

	List<IfaceInfo> m_ChildDeps;	/** Children who might depend on us */

	List<SMInterface *> m_Interfaces;

	List<IPlugin *> m_Plugins;

	List<const sp_nativeinfo_t *> m_Natives;

	List<WeakNative> m_WeakNatives;

	PluginId m_PlId;

	unsigned int unload_code;

	bool m_FullyLoaded;

};

class CExtensionManager : 

	public IExtensionManager,

	public SMGlobalClass,

	public IPluginsListener,

	public IRootConsoleCommand

{

public: //SMGlobalClass

	void OnSourceModAllInitialized();

	void OnSourceModShutdown();

public: //IExtensionManager

	IExtension *LoadExtension(const char *path, 

		ExtensionLifetime lifetime, 

		char *error,

		size_t maxlength);

	bool UnloadExtension(IExtension *pExt);

	IExtension *FindExtensionByFile(const char *file);

	IExtension *FindExtensionByName(const char *ext);

public: //IPluginsListener

	void OnPluginDestroyed(IPlugin *plugin);

public: //IRootConsoleCommand

	void OnRootConsoleCommand(const char *cmd, unsigned int argcount);

public:

	IExtension *LoadAutoExtension(const char *path);

	void BindDependency(IExtension *pOwner, IfaceInfo *pInfo);

	void AddInterface(IExtension *pOwner, SMInterface *pInterface);

	void BindChildPlugin(IExtension *pParent, IPlugin *pPlugin);

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

	void BindAllNativesToPlugin(IPlugin *pPlugin);

	void MarkAllLoaded();

	void AddDependency(IExtension *pSource, const char *file, bool required, bool autoload);

	void TryAutoload();

public:

	CExtension *GetExtensionFromIdent(IdentityToken_t *ptr);

	void Shutdown();

private:

	CExtension *FindByOrder(unsigned int num);

private:

	List<CExtension *> m_Libs;

};

extern CExtensionManager g_Extensions;

#endif //_INCLUDE_SOURCEMOD_EXTENSION_SYSTEM_H_