/**

 * vim: set ts=4 :

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

 * SourceMod (C)2004-2007 AlliedModders LLC.  All rights reserved.

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

 *

 * This file is not open source and may not be copied without explicit

 * written permission of AlliedModders LLC.  This file may not be redistributed 

 * in whole or significant part.

 * For information, see LICENSE.txt 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 IDBThreadOperation

{

public:

	virtual IDBDriver *GetDriver() =0;

	virtual CPlugin *GetPlugin() =0;

	virtual void RunThreadPart() =0;

	virtual void RunThinkPart() =0;

	virtual void CancelThinkPart() =0;

};

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 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);

public: //ITextListener_SMC

	void ReadSMC_ParseStart();

	SMCParseResult ReadSMC_NewSection(const char *name, bool opt_quotes);

	SMCParseResult ReadSMC_KeyValue(const char *key, const char *value, bool key_quotes, bool value_quotes);

	SMCParseResult ReadSMC_LeavingSection();

	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_