/**

 * vim: set ts=4 :

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

 * 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_DATABASE_MANAGER_H_

#define _INCLUDE_DATABASE_MANAGER_H_

#include <IDBDriver.h>

#include "sm_globals.h"

#include <sh_vector.h>

#include <sh_string.h>

#include <sh_list.h>

#include <ITextParsers.h>

#include "sm_memtable.h"

#include <IThreader.h>

#include "sm_simple_prioqueue.h"

#include "PluginSys.h"

using namespace SourceHook;

struct ConfDbInfo

{

	ConfDbInfo() : name(-1), driver(-1), host(-1), user(-1), pass(-1), 

		database(-1), realDriver(NULL)

	{

	}

	int name;

	int driver;

	int host;

	int user;

	int pass;

	int database;

	IDBDriver *realDriver;

	DatabaseInfo info;

};

class DBManager : 

	public IDBManager,

	public SMGlobalClass,

	public IHandleTypeDispatch,

	public ITextListener_SMC,

	public IThread,

	public IThreadWorkerCallbacks,

	public IPluginsListener

{

public:

	DBManager();

public:

	const char *GetInterfaceName();

	unsigned int GetInterfaceVersion();

public: //SMGlobalClass

	void OnSourceModAllInitialized();

	void OnSourceModLevelChange(const char *mapName);

	void OnSourceModIdentityDropped(IdentityToken_t *pToken);

	void OnSourceModShutdown();

public: //IHandleTypeDispatch

	void OnHandleDestroy(HandleType_t type, void *object);

public: //IDBManager

	void AddDriver(IDBDriver *pDrivera);

	void RemoveDriver(IDBDriver *pDriver);

	const DatabaseInfo *FindDatabaseConf(const char *name);

	bool Connect(const char *name, IDBDriver **pdr, IDatabase **pdb, bool persistent, char *error, size_t maxlength);

	unsigned int GetDriverCount();

	IDBDriver *GetDriver(unsigned int index);

	Handle_t CreateHandle(DBHandleType type, void *ptr, IdentityToken_t *pToken);

	HandleError ReadHandle(Handle_t hndl, DBHandleType type, void **ptr);

	HandleError ReleaseHandle(Handle_t hndl, DBHandleType type, IdentityToken_t *token);

	void AddDependency(IExtension *myself, IDBDriver *driver);

public: //ITextListener_SMC

	void ReadSMC_ParseStart();

	SMCResult ReadSMC_NewSection(const SMCStates *states, const char *name);

	SMCResult ReadSMC_KeyValue(const SMCStates *states, const char *key, const char *value);

	SMCResult ReadSMC_LeavingSection(const SMCStates *states);

	void ReadSMC_ParseEnd(bool halted, bool failed);

public: //IThread

	void RunThread(IThreadHandle *pThread);

	void OnTerminate(IThreadHandle *pThread, bool cancel);

public: //IThreadWorkerCallbacks

	void OnWorkerStart(IThreadWorker *pWorker);

	void OnWorkerStop(IThreadWorker *pWorker);

public: //IPluginsListener

	void OnPluginUnloaded(IPlugin *plugin);

public:

	ConfDbInfo *GetDatabaseConf(const char *name);

	IDBDriver *FindOrLoadDriver(const char *name);

	IDBDriver *GetDefaultDriver();

	const char *GetDefaultDriverName();

	bool AddToThreadQueue(IDBThreadOperation *op, PrioQueueLevel prio);

	void LockConfig();

	void UnlockConfig();

	void RunFrame();

	inline HandleType_t GetDatabaseType()

	{

		return m_DatabaseType;

	}

private:

	void KillWorkerThread();

private:

	CVector<IDBDriver *> m_drivers;

	/* Threading stuff */

	PrioQueue<IDBThreadOperation *> m_OpQueue;

	Queue<IDBThreadOperation *> m_ThinkQueue;

	CVector<bool> m_drSafety;			/* which drivers are safe? */

	IThreadWorker *m_pWorker;			/* Worker thread object */

	IMutex *m_pConfigLock;				/* Configuration lock */

	IMutex *m_pQueueLock;				/* Queue safety lock */

	IMutex *m_pThinkLock;				/* Think-queue lock */

	List<ConfDbInfo> m_confs;

	HandleType_t m_DriverType;

	HandleType_t m_DatabaseType;

	String m_DefDriver;

	BaseStringTable m_StrTab;

	char m_Filename[PLATFORM_MAX_PATH];

	unsigned int m_ParseLevel;

	unsigned int m_ParseState;

	IDBDriver *m_pDefault;

};

extern DBManager g_DBMan;

#endif //_INCLUDE_DATABASE_MANAGER_H_