#ifndef _XSPROTOCOL_HPP
#define _XSPROTOCOL_HPP
/*-------------------------------------------------------------------------
 * drawElements Quality Program Execution Server
 * ---------------------------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief Execution Server Protocol.
 *//*--------------------------------------------------------------------*/

#include "xsDefs.hpp"
#include "deMemory.h"

#include <string>
#include <vector>

namespace xs
{

enum
{
	PROTOCOL_VERSION			= 18,
	MESSAGE_HEADER_SIZE			= 8,

	// Times are in milliseconds.
	KEEPALIVE_SEND_INTERVAL		= 5000,
	KEEPALIVE_TIMEOUT			= 30000,
};

enum MessageType
{
	MESSAGETYPE_NONE					= 0,	//!< Not valid.

	// Commands (from Client to ExecServer).
	MESSAGETYPE_HELLO					= 100,	//!< First message from client, specifies the protocol version
	MESSAGETYPE_TEST					= 101,	//!< Debug only
	MESSAGETYPE_EXECUTE_BINARY			= 111,	//!< Request execution of a test package binary.
	MESSAGETYPE_STOP_EXECUTION			= 112,	//!< Request cancellation of the currently executing binary.

	// Responses (from ExecServer to Client)
	MESSAGETYPE_PROCESS_STARTED			= 200,	//!< Requested process has started.
	MESSAGETYPE_PROCESS_LAUNCH_FAILED	= 201,	//!< Requested process failed to launch.
	MESSAGETYPE_PROCESS_FINISHED		= 202,	//!< Requested process has finished (for any reason).
	MESSAGETYPE_PROCESS_LOG_DATA		= 203,	//!< Unprocessed log data from TestResults.qpa.
	MESSAGETYPE_INFO					= 204,	//!< Generic info message from ExecServer (for debugging purposes).

	MESSAGETYPE_KEEPALIVE				= 102	//!< Keep-alive packet
};

class MessageWriter;

class Message
{
public:
	MessageType		type;

					Message			(MessageType type_) : type(type_) {}
	virtual			 ~Message		(void) {}

	virtual void	write			(std::vector<deUint8>& buf) const = DE_NULL;

	static void		parseHeader		(const deUint8* data, size_t dataSize, MessageType& type, size_t& messageSize);
	static void		writeHeader		(MessageType type, size_t messageSize, deUint8* dst, size_t bufSize);

protected:
	void			writeNoData		(std::vector<deUint8>& buf) const;

					Message			(const Message& other);
	Message&		operator=		(const Message& other);
};

// Simple messages without any data.
template <int MsgType>
class SimpleMessage : public Message
{
public:
					SimpleMessage	(const deUint8* data, size_t dataSize) : Message((MessageType)MsgType) { DE_UNREF(data); XS_CHECK_MSG(dataSize == 0, "No payload expected"); }
					SimpleMessage	(void) : Message((MessageType)MsgType) {}
					~SimpleMessage	(void) {}

	void			write			(std::vector<deUint8>& buf) const { writeNoData(buf); }
};

typedef SimpleMessage<MESSAGETYPE_STOP_EXECUTION>			StopExecutionMessage;
typedef SimpleMessage<MESSAGETYPE_PROCESS_STARTED>			ProcessStartedMessage;
typedef SimpleMessage<MESSAGETYPE_KEEPALIVE>				KeepAliveMessage;

class HelloMessage : public Message
{
public:
	int				version;

					HelloMessage	(const deUint8* data, size_t dataSize);
					HelloMessage	(void) : Message(MESSAGETYPE_HELLO), version(PROTOCOL_VERSION) {}
					~HelloMessage	(void) {}

	void			write			(std::vector<deUint8>& buf) const;
};

class ExecuteBinaryMessage : public Message
{
public:
	std::string		name;
	std::string		params;
	std::string		workDir;
	std::string		caseList;

					ExecuteBinaryMessage	(const deUint8* data, size_t dataSize);
					ExecuteBinaryMessage	(void) : Message(MESSAGETYPE_EXECUTE_BINARY) {}
					~ExecuteBinaryMessage	(void) {}

	void			write			(std::vector<deUint8>& buf) const;
};

class ProcessLogDataMessage : public Message
{
public:
	std::string		logData;

					ProcessLogDataMessage		(const deUint8* data, size_t dataSize);
					~ProcessLogDataMessage		(void) {}

	void			write						(std::vector<deUint8>& buf) const;
};

class ProcessLaunchFailedMessage : public Message
{
public:
	std::string		reason;

					ProcessLaunchFailedMessage			(const deUint8* data, size_t dataSize);
					ProcessLaunchFailedMessage			(const char* reason_) : Message(MESSAGETYPE_PROCESS_LAUNCH_FAILED), reason(reason_) {}
					~ProcessLaunchFailedMessage			(void) {}

	void			write								(std::vector<deUint8>& buf) const;
};

class ProcessFinishedMessage : public Message
{
public:
	int				exitCode;

					ProcessFinishedMessage			(const deUint8* data, size_t dataSize);
					ProcessFinishedMessage			(int exitCode_) : Message(MESSAGETYPE_PROCESS_FINISHED), exitCode(exitCode_) {}
					~ProcessFinishedMessage			(void) {}

	void			write							(std::vector<deUint8>& buf) const;
};

class InfoMessage : public Message
{
public:
	std::string		info;

					InfoMessage			(const deUint8* data, size_t dataSize);
					~InfoMessage		(void) {}

	void			write				(std::vector<deUint8>& buf) const;
};

// For debug purposes only.
class TestMessage : public Message
{
public:
	std::string		test;

					TestMessage		(const deUint8* data, size_t dataSize);
					~TestMessage	(void) {}

	void			write			(std::vector<deUint8>& buf) const;
};

} // xs

#endif // _XSPROTOCOL_HPP