/*******************************************************************************
 * libretroshare/src/retroshare: rshistory.h                                   *
 *                                                                             *
 * libretroshare: retroshare core library                                      *
 *                                                                             *
 * Copyright 2011 by Thunder                                                   *
 *                                                                             *
 * This program is free software: you can redistribute it and/or modify        *
 * it under the terms of the GNU Lesser General Public License as              *
 * published by the Free Software Foundation, either version 3 of the          *
 * License, or (at your option) any later version.                             *
 *                                                                             *
 * 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 Lesser General Public License for more details.                         *
 *                                                                             *
 * You should have received a copy of the GNU Lesser General Public License    *
 * along with this program. If not, see <https://www.gnu.org/licenses/>.       *
 *                                                                             *
 *******************************************************************************/
#ifndef RS_HISTORY_INTERFACE_H
#define RS_HISTORY_INTERFACE_H

class RsHistory;
class ChatId;

extern RsHistory *rsHistory;

#include <string>
#include <inttypes.h>
#include <list>
#include "retroshare/rstypes.h"

//! data object for message history
/*!
 * data object used for message history
 */
static const uint32_t RS_HISTORY_TYPE_PUBLIC  = 0 ;
static const uint32_t RS_HISTORY_TYPE_PRIVATE = 1 ;
static const uint32_t RS_HISTORY_TYPE_LOBBY   = 2 ;
static const uint32_t RS_HISTORY_TYPE_DISTANT = 3 ;

class HistoryMsg: RsSerializable
{
public:
	HistoryMsg()
	{
		msgId = 0;
		incoming = false;
		sendTime = 0;
		recvTime = 0;
	}

    virtual void serial_process(RsGenericSerializer::SerializeJob j, RsGenericSerializer::SerializeContext& ctx) override
    {
        RS_SERIAL_PROCESS(msgId);
        RS_SERIAL_PROCESS(chatPeerId);
        RS_SERIAL_PROCESS(incoming);
        RS_SERIAL_PROCESS(peerId);
        RS_SERIAL_PROCESS(peerName);
        RS_SERIAL_PROCESS(sendTime);
        RS_SERIAL_PROCESS(recvTime);
        RS_SERIAL_PROCESS(message);
    }

	uint32_t    msgId;
	RsPeerId chatPeerId;
	bool        incoming;
	RsPeerId peerId;
	std::string peerName;
	uint32_t    sendTime;
	uint32_t    recvTime;
	std::string message;
};

//! Interface to retroshare for message history
/*!
 * Provides an interface for retroshare's message history functionality
 */
class RsHistory
{
public:
	virtual bool chatIdToVirtualPeerId(const ChatId &chat_id, RsPeerId &peer_id) = 0;

    /*!
     * @brief Retrieves the history of messages for a given chatId
     * @jsonapi{development}
     * @param[in]  chatPeerId    Chat Id for which the history needs to be retrieved
     * @param[out] msgs          retrieved messages
     * @param[in]  loadCount     maximum number of messages to get
     * @return true if messages can be retrieved, false otherwise.
     */
    virtual bool getMessages(const ChatId& chatPeerId, std::list<HistoryMsg> &msgs, uint32_t loadCount) = 0;

    /*!
     * @brief Retrieves a specific message from the history
     * @jsonapi{development}
     * @param[in]  msgId         Id of the message to get
     * @param[out] msg           retrieved message
     * @return true if message can be retrieved, false otherwise.
     */
	virtual bool getMessage(uint32_t msgId, HistoryMsg &msg) = 0;

    /*!
     * @brief Remove messages from the history
     * @jsonapi{development}
     * @param[in] msgIds list of messages to remove
     */
    virtual void removeMessages(const std::list<uint32_t>& msgIds) = 0;

    /*!
     * @brief clears the message history for a given chat peer
     * @jsonapi{development}
     * @param[in]  chatPeerID    Id of the chat/peer for which the history needs to be wiped
     */
    virtual void clear(const ChatId &chatPeerId) = 0;

    /*!
     * @brief Get whether chat history is enabled or not
     * @jsonapi{development}
     * @param[in]  chat_type    Type of chat (see list of constants above)
     * @return true when the information is available
     */
    virtual bool getEnable(uint32_t chat_type) = 0;

    /*!
     * @brief Set whether chat history is enabled or not
     * @jsonapi{development}
     * @param[in]  chat_type    Type of chat (see list of constants above)
     * @param[in]  enabled      Desired state of the variable
     */
    virtual void setEnable(uint32_t chat_type, bool enable) = 0;

    /*!
     * @brief Retrieves the maximum storage time period for messages in history
     * @return max storage duration of chat.
     */
	virtual uint32_t getMaxStorageDuration() = 0;
    /*!
     * @brief Sets the maximum storage time period for messages in history
     * @param[in] seconds max storage duration time in seconds
     */
    virtual void     setMaxStorageDuration(uint32_t seconds) = 0;

    /*!
     * @brief Gets the maximum number of messages to save
     * @param[in] chat_type Type of chat for that number limit
     * @return maximum number of messages to save
     */
    virtual uint32_t getSaveCount(uint32_t chat_type) = 0;

    /*!
     * @brief Sets the maximum number of messages to save
     * @param[in] chat_type Type of chat for that number limit
     * @param[in] count     Max umber of messages, 0 meaning indefinitly
     */
    virtual void     setSaveCount(uint32_t chat_type, uint32_t count) = 0;
};

#endif