/*
 * Copyright (C) 2014-2022 CZ.NIC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations including
 * the two.
 */

#pragma once

#include <QRunnable>
#include <QString>

#include "src/common.h" // qdatovka_error, enum MessageDirection
#include "src/io/message_db_set.h"

/*!
 * @brief Maximum length of message list to be downloaded.
 */
#define MESSAGE_LIST_LIMIT 100000

/*!
 * @brief Progress-bar labels used.
 */
#define PL_DOWNLOAD_MESSAGE "DownloadMessage"
#define PL_DOWNLOAD_RECEIVED_LIST "DownloadReceivedMessageList"
#define PL_DOWNLOAD_SENT_LIST "DownloadSentMessageList"
#define PL_GET_ACCOUNT_LIST "GetAccounts"
#define PL_IDLE "Idle"
#define PL_IMPORT_MSG "ImportMessage"
#define PL_IMPORT_ZFO_DINFO "ImportZfoDeliveryInfo"
#define PL_IMPORT_ZFO_MSG "ImportZfoMessage"
#define PL_SEND_MESSAGE "SendMessage"
#define PL_SPLIT_DB "DatabaseSplit"
#define PL_SYNC_ACCOUNT "SyncAccount"

/*!
 * @brief This class contains generic functions that can be used in derived
 *        classes.
 */
class Task : public QRunnable {
public:
	enum ProcessFlag {
		PROC_NOTHING = 0x00, /*< Nothing to be processed. */
		PROC_LIST_SCHEDULED = 0x01, /*!< Task has been scheduled from download message list task. */
		PROC_LIST_SCHEDULED_LAST = 0x02, /*!< Task is a last in the sequence. */
		PROC_IMM_DOWNLOAD = 0x04, /*!< Download immediately after the message has been sent. */
		PROC_IMM_RM_UPLOAD = 0x08, /*!< Upload into records management after the message has been downloaded. */
		PROC_IMM_RM_UPLOAD_AMBIG = 0x10, /*!< Cannot perform automatic records management upload because ambiguous targets. */
		PROC_NO_ERROR_DLG = 0x20 /*!< Suppress error dialogue. */
	};

	/*!
	 * @brief Method to be implemented in derived classes.
	 */
	virtual
	void run(void) = 0;

protected:

	/*!
	 * @brief Store signed message delivery info into database.
	 *
	 * @param[in,out] dbSet Database container.
	 * @param[in] message Message structure.
	 * @return Error state.
	 */
	static
	qdatovka_error storeSignedDeliveryInfo(MessageDbSet &dbSet,
	    const Isds::Message &message);

	/*!
	 * @brief Store message envelope into database.
	 *
	 * @param[in] transaction True to create a transaction.
	 * @param[in] msgDirect Received or sent message.
	 * @param[in,out] dbSet Database container.
	 * @param[in] envelope  Message envelope structure.
	 * @return Error state.
	 */
	static
	qdatovka_error storeMessageEnvelope(bool transaction,
	    enum MessageDirection msgDirect, MessageDbSet &dbSet,
	    const Isds::Envelope &envelope);

	/*!
	 * @brief Update message envelope in database.
	 *
	 * @param[in] transaction True to create a transaction.
	 * @param[in] msgDirect Received or sent message.
	 * @param[in,out] messageDb Database container.
	 * @param[in] envelope Message envelope structure.
	 * @return True on success.
	 */
	static
	qdatovka_error updateMessageEnvelope(bool transaction,
	    enum MessageDirection msgDirect, MessageDb &messageDb,
	    const Isds::Envelope &envelope);

	/*!
	 * @brief Store complete signed message into database.
	 *
	 * @param[in] transaction True to create a transaction.
	 * @param[in] msgDirect Received or sent message.
	 * @param[in,out] dbSet Database container.
	 * @param[in] message Message structure.
	 * @return Error state.
	 */
	static
	qdatovka_error storeSignedMessage(bool transaction,
	    enum MessageDirection msgDirect, MessageDbSet &dbSet,
	    const Isds::Message &message);
};
