#ifndef PROTOCOL_H
#define PROTOCOL_H

#include <string>
#include <utility>
#include "util.h"


class protocol
{
public:
	class state
	{
	public:
		enum type
		{
			connected,
			disconnected
		};
	};

	typedef std::pair<state::type, std::string> result;

public:
	explicit protocol(const context& context);

	result openConnection(const std::string& address);
	result processMessage(const std::string& message);

private:
	class internalState
	{
	public:
		enum type
		{
			none,
			connect,
			helo,
			auth_login_user,
			auth_login_pass,
			mail_from,
			rcpt_to,
			data,
			mime_oundary,
			image_data,
			disconnect
		};
	};

private:
	result answer(state::type state, std::string answer) const;
	void appendMessage(const std::string& message);

private:
	internalState::type m_internalState;
	std::string m_address;
	std::string m_message;

	const context& m_context;
};

#endif // PROTOCOL_H