/*
 *  The contents of this file are subject to the Initial
 *  Developer's Public License Version 1.0 (the "License");
 *  you may not use this file except in compliance with the
 *  License. You may obtain a copy of the License at
 *  http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
 *
 *  Software distributed under the License is distributed AS IS,
 *  WITHOUT WARRANTY OF ANY KIND, either express or implied.
 *  See the License for the specific language governing rights
 *  and limitations under the License.
 *
 *  The Original Code was created by Alex Peshkov
 *  for the Firebird Open Source RDBMS project.
 *
 *  Copyright (c) 2011 Alex Peshkov <peshkoff@mail.ru>
 *  and all contributors signed below.
 *
 *  All Rights Reserved.
 *  Contributor(s): ______________________________________.
 */

#ifndef JRD_ENGINE_INTERFACE_H
#define JRD_ENGINE_INTERFACE_H

#include "ProviderInterface.h"
#include "../common/classes/ImplementHelper.h"
#include "../common/StatementMetadata.h"
#include "../common/classes/RefCounted.h"

namespace Jrd {

// Engine objects used by interface objects
class blb;
class jrd_tra;
class dsql_req;
class JrdStatement;
class Attachment;
class Service;

// forward declarations
class JAttachment;
class JProvider;

class JBlob : public Firebird::StdIface<Firebird::IBlob, FB_I_BLOB_VERSION>
{
public:
	// IBlob implementation
	virtual int FB_CARG release();
	virtual void FB_CARG getInfo(Firebird::IStatus* status,
						 unsigned int itemsLength, const unsigned char* items,
						 unsigned int bufferLength, unsigned char* buffer);
	virtual unsigned int FB_CARG getSegment(Firebird::IStatus* status, unsigned int length, void* buffer);	// returns real length
	virtual void FB_CARG putSegment(Firebird::IStatus* status, unsigned int length, const void* buffer);
	virtual void FB_CARG cancel(Firebird::IStatus* status);
	virtual void FB_CARG close(Firebird::IStatus* status);
	virtual int FB_CARG seek(Firebird::IStatus* status, int mode, int offset);			// returns position

public:
	JBlob(blb* handle, JAttachment* ja) : blob(handle), jAtt(ja) { }

	JAttachment* getAttachment()
	{
		return jAtt;
	}

	blb* getHandle()
	{
		return blob;
	}

private:
	blb* blob;
	Firebird::RefPtr<JAttachment> jAtt;

	void freeEngineData(Firebird::IStatus* status);
};

class JTransaction : public Firebird::StdIface<Firebird::ITransaction, FB_I_TRANSACTION_VERSION>
{
public:
	// ITransaction implementation
	virtual int FB_CARG release();
	virtual void FB_CARG getInfo(Firebird::IStatus* status,
						 unsigned int itemsLength, const unsigned char* items,
						 unsigned int bufferLength, unsigned char* buffer);
	virtual void FB_CARG prepare(Firebird::IStatus* status,
						 unsigned int msg_length = 0, const unsigned char* message = 0);
	virtual void FB_CARG commit(Firebird::IStatus* status);
	virtual void FB_CARG commitRetaining(Firebird::IStatus* status);
	virtual void FB_CARG rollback(Firebird::IStatus* status);
	virtual void FB_CARG rollbackRetaining(Firebird::IStatus* status);
	virtual void FB_CARG disconnect(Firebird::IStatus* status);

public:
	JTransaction(jrd_tra* handle, JAttachment* ja) : transaction(handle), jAtt(ja) { }

	jrd_tra* getHandle()
	{
		return transaction;
	}

	void setHandle(jrd_tra* handle)
	{
		transaction = handle;
	}

	JAttachment* getAttachment()
	{
		return jAtt;
	}

	void clear()
	{
		transaction = NULL;
		release();
	}

private:
	jrd_tra* transaction;
	Firebird::RefPtr<JAttachment> jAtt;

	void freeEngineData(Firebird::IStatus* status);
};

class JStatement : public Firebird::StdIface<Firebird::IStatement, FB_I_STATEMENT_VERSION>
{
public:
	// IStatement implementation
	virtual int FB_CARG release();
	void FB_CARG prepare(Firebird::IStatus* status, Firebird::ITransaction* tra,
						 unsigned int stmtLength, const char* sqlStmt,
						 unsigned int dialect, unsigned int flags);
	virtual void FB_CARG getInfo(Firebird::IStatus* status,
								 unsigned int itemsLength, const unsigned char* items,
								 unsigned int bufferLength, unsigned char* buffer);
	virtual void FB_CARG setCursorName(Firebird::IStatus* status, const char* name);
	virtual JTransaction* FB_CARG execute(Firebird::IStatus* status, Firebird::ITransaction* tra,
										unsigned int in_msg_type, const Firebird::FbMessage* inMsgBuffer,
										const Firebird::FbMessage* outMsgBuffer);
	virtual int FB_CARG fetch(Firebird::IStatus* status, const Firebird::FbMessage* msgBuffer);	// returns 100 if EOF, 101 if fragmented
	virtual void FB_CARG insert(Firebird::IStatus* status, const Firebird::FbMessage* msgBuffer);
	virtual void FB_CARG free(Firebird::IStatus* status, unsigned int option);
	virtual ISC_UINT64 FB_CARG getAffectedRecords(Firebird::IStatus* userStatus);
	virtual const Firebird::IParametersMetadata* FB_CARG getOutputParameters(Firebird::IStatus* userStatus);
	virtual const Firebird::IParametersMetadata* FB_CARG getInputParameters(Firebird::IStatus* userStatus);
	virtual unsigned FB_CARG getType(Firebird::IStatus* status);
    virtual const char* FB_CARG getPlan(Firebird::IStatus* status, bool detailed);

public:
	JStatement(dsql_req* handle, JAttachment* ja)
		: statement(handle), jAtt(ja), metadata(getPool(), this)
	{ }

	JAttachment* getAttachment()
	{
		return jAtt;
	}

	dsql_req* getHandle()
	{
		return statement;
	}

private:
	dsql_req* statement;
	Firebird::RefPtr<JAttachment> jAtt;
	Firebird::StatementMetadata metadata;

	void freeEngineData(Firebird::IStatus* status, unsigned int option);
};

class JRequest : public Firebird::StdIface<Firebird::IRequest, FB_I_REQUEST_VERSION>
{
public:
	// IRequest implementation
	virtual int FB_CARG release();
	virtual void FB_CARG receive(Firebird::IStatus* status, int level, unsigned int msg_type,
						 unsigned int length, unsigned char* message);
	virtual void FB_CARG send(Firebird::IStatus* status, int level, unsigned int msg_type,
					  unsigned int length, const unsigned char* message);
	virtual void FB_CARG getInfo(Firebird::IStatus* status, int level,
						 unsigned int itemsLength, const unsigned char* items,
						 unsigned int bufferLength, unsigned char* buffer);
	virtual void FB_CARG start(Firebird::IStatus* status, Firebird::ITransaction* tra, int level);
	virtual void FB_CARG startAndSend(Firebird::IStatus* status, Firebird::ITransaction* tra, int level, unsigned int msg_type,
							  unsigned int length, const unsigned char* message);
	virtual void FB_CARG unwind(Firebird::IStatus* status, int level);
	virtual void FB_CARG free(Firebird::IStatus* status);

public:
	JRequest(JrdStatement* handle, JAttachment* ja) : rq(handle), jAtt(ja) { }

	JAttachment* getAttachment()
	{
		return jAtt;
	}

	JrdStatement* getHandle()
	{
		return rq;
	}

private:
	JrdStatement* rq;
	Firebird::RefPtr<JAttachment> jAtt;

	void freeEngineData(Firebird::IStatus* status);
};

class JEvents : public Firebird::StdIface<Firebird::IEvents, FB_I_EVENTS_VERSION>
{
public:
	// IEvents implementation
	virtual int FB_CARG release();
	virtual void FB_CARG cancel(Firebird::IStatus* status);

public:
	JEvents(int aId, JAttachment* ja) : id(aId), jAtt(ja) { }

	JEvents* getHandle()
	{
		return this;
	}

	JAttachment* getAttachment()
	{
		return jAtt;
	}

private:
	int id;
	Firebird::RefPtr<JAttachment> jAtt;

	void freeEngineData(Firebird::IStatus* status);
};

class JAttachment : public Firebird::StdIface<Firebird::IAttachment, FB_I_ATTACHMENT_VERSION>
{
public:
	// IAttachment implementation
	virtual int FB_CARG release();
	virtual void FB_CARG getInfo(Firebird::IStatus* status,
						 unsigned int itemsLength, const unsigned char* items,
						 unsigned int bufferLength, unsigned char* buffer);
	virtual JTransaction* FB_CARG startTransaction(Firebird::IStatus* status, unsigned int tpbLength, const unsigned char* tpb,
										  FB_API_HANDLE api);
	virtual JTransaction* FB_CARG reconnectTransaction(Firebird::IStatus* status, unsigned int length, const unsigned char* id);
	virtual JStatement* FB_CARG allocateStatement(Firebird::IStatus* status);
	virtual JRequest* FB_CARG compileRequest(Firebird::IStatus* status, unsigned int blr_length, const unsigned char* blr);
	virtual void FB_CARG transactRequest(Firebird::IStatus* status, Firebird::ITransaction* transaction,
								 unsigned int blr_length, const unsigned char* blr,
								 unsigned int in_msg_length, const unsigned char* in_msg,
								 unsigned int out_msg_length, unsigned char* out_msg);
	virtual JBlob* FB_CARG createBlob(Firebird::IStatus* status, Firebird::ITransaction* transaction,
		ISC_QUAD* id, unsigned int bpbLength = 0, const unsigned char* bpb = 0);
	virtual JBlob* FB_CARG openBlob(Firebird::IStatus* status, Firebird::ITransaction* transaction,
		ISC_QUAD* id, unsigned int bpbLength = 0, const unsigned char* bpb = 0);
	virtual int FB_CARG getSlice(Firebird::IStatus* status, Firebird::ITransaction* transaction, ISC_QUAD* id,
						 unsigned int sdl_length, const unsigned char* sdl,
						 unsigned int param_length, const unsigned char* param,
						 int sliceLength, unsigned char* slice);
	virtual void FB_CARG putSlice(Firebird::IStatus* status, Firebird::ITransaction* transaction, ISC_QUAD* id,
						  unsigned int sdl_length, const unsigned char* sdl,
						  unsigned int param_length, const unsigned char* param,
						  int sliceLength, unsigned char* slice);
	virtual void FB_CARG ddl(Firebird::IStatus* status, Firebird::ITransaction* transaction, unsigned int length,
		const unsigned char* dyn);
	virtual JTransaction* FB_CARG execute(Firebird::IStatus* status, Firebird::ITransaction* transaction,
								 unsigned int length, const char* string, unsigned int dialect,
								 unsigned int in_msg_type, const Firebird::FbMessage* inMsgBuffer,
								 const Firebird::FbMessage* outMsgBuffer);
	virtual JEvents* FB_CARG queEvents(Firebird::IStatus* status, Firebird::IEventCallback* callback,
											unsigned int length, const unsigned char* events);
	virtual void FB_CARG cancelOperation(Firebird::IStatus* status, int option);
	virtual void FB_CARG ping(Firebird::IStatus* status);
	virtual void FB_CARG detach(Firebird::IStatus* status);
	virtual void FB_CARG drop(Firebird::IStatus* status);

public:
	JAttachment(Attachment* handle);

	Attachment* getHandle()
	{
		return att;
	}

	JAttachment* getAttachment()
	{
		return this;
	}

	Firebird::Mutex* getMutex(bool useAsync = false)
	{
		return useAsync ? &asyncMutex : &mainMutex;
	}

	void cancel()
	{
		asyncMutex.assertLocked();
		mainMutex.assertLocked();

		att = NULL;
	}

private:
	Attachment* att;
	Firebird::Mutex mainMutex, asyncMutex;

	void freeEngineData(Firebird::IStatus* status);
};

class JService : public Firebird::StdIface<Firebird::IService, FB_I_SERVICE_VERSION>
{
public:
	// IService implementation
	virtual int FB_CARG release();
	virtual void FB_CARG detach(Firebird::IStatus* status);
	virtual void FB_CARG query(Firebird::IStatus* status,
					   unsigned int sendLength, const unsigned char* sendItems,
					   unsigned int receiveLength, const unsigned char* receiveItems,
					   unsigned int bufferLength, unsigned char* buffer);
	virtual void FB_CARG start(Firebird::IStatus* status,
					   unsigned int spbLength, const unsigned char* spb);

public:
	JService(Service* handle);

private:
	Service* svc;

	void freeEngineData(Firebird::IStatus* status);
};

class JProvider : public Firebird::StdPlugin<Firebird::IProvider, FB_I_PROVIDER_VERSION>
{
public:
	explicit JProvider(Firebird::IPluginConfig*)
	{ }

	// IProvider implementation
	virtual void FB_CARG attachDatabase(Firebird::IStatus* status, Firebird::IAttachment** ptr, FB_API_HANDLE api, const char* fileName,
								unsigned int dpbLength, const unsigned char* dpb);
	virtual void FB_CARG createDatabase(Firebird::IStatus* status, Firebird::IAttachment** ptr, FB_API_HANDLE api, const char* fileName,
								unsigned int dpbLength, const unsigned char* dpb);
	virtual JService* FB_CARG attachServiceManager(Firebird::IStatus* status, const char* service,
												   unsigned int spbLength, const unsigned char* spb);
	//virtual ITransaction* startTransaction(Firebird::IStatus* status, unsigned int count, ...);
	//virtual ITransaction* startMultiple(Firebird::IStatus* status, MultipleTransaction* multi);
	virtual void FB_CARG shutdown(Firebird::IStatus* status, unsigned int timeout, const int reason);
	virtual int FB_CARG release();
};

} // namespace Jrd

#endif // JRD_ENGINE_INTERFACE_H