/*
 *  This file is part of nzbget. See <https://nzbget.com>.
 *
 *  Copyright (C) 2005 Bo Cordes Petersen <placebodk@users.sourceforge.net>
 *  Copyright (C) 2007-2017 Andrey Prygunkov <hugbug@users.sourceforge.net>
 *
 *  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 2 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/>.
 */


#ifndef MESSAGEBASE_H
#define MESSAGEBASE_H

static const int32 NZBMESSAGE_SIGNATURE = 0x6E7A6231; // = "nzb-XX" (protocol version)
static const int NZBREQUESTFILENAMESIZE = 512;
static const int NZBREQUESTPASSWORDSIZE = 32;

/**
* NZBGet communication protocol uses only two basic data types: integer and char.
* Integer values are passed using network byte order (Big-Endian).
* Use function "htonl" and "ntohl" to convert integers to/from machine
* (host) byte order.
* All char-strings ends with nullptr-char.
*
* NOTE:
* NZBGet communication protocol is intended for usage only by NZBGet itself.
* The communication works only if server and client has the same version.
* The compatibility with previous program versions is not provided.
* Third-party programs should use JSON-RPC or XML-RPC to communicate with NZBGet.
*/

// Possible values for field "m_type" of struct "SNZBRequestBase":
enum ERemoteRequest
{
	rrDownload = 1,
	rrPauseUnpause,
	rrList,
	rrSetDownloadRate,
	rrDumpDebug,
	rrEditQueue,
	rrLog,
	rrShutdown,
	rrReload,
	rrVersion,
	rrPostQueue,
	rrWriteLog,
	rrScan,
	rrHistory
};

// Possible values for field "m_action" of struct "SNZBPauseUnpauseRequest":
enum ERemotePauseUnpauseAction
{
	rpDownload = 1, // pause/unpause download queue
	rpPostProcess, // pause/unpause post-processor queue
	rpScan // pause/unpause scan of incoming nzb-directory
};

// Possible values for field "m_matchMode" of struct "SNZBEditQueueRequest":
enum ERemoteMatchMode
{
	rmId = 1, // ID
	rmName, // Name
	rmRegEx // RegEx
};

// The basic SNZBRequestBase struct, used in all requests
struct SNzbRequestBase
{
	int32 m_signature; // Signature must be NZBMESSAGE_SIGNATURE in integer-value
	int32 m_structSize; // Size of the entire struct
	int32 m_type; // Message type, see enum in NZBMessageRequest-namespace
	char m_username[NZBREQUESTPASSWORDSIZE]; // User name
	char m_password[NZBREQUESTPASSWORDSIZE]; // Password
};

// The basic SNZBResposneBase struct, used in all responses
struct SNzbResponseBase
{
	int32 m_signature; // Signature must be NZBMESSAGE_SIGNATURE in integer-value
	int32 m_structSize; // Size of the entire struct
};

// A download request
struct SNzbDownloadRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
	char m_nzbFilename[NZBREQUESTFILENAMESIZE]; // Name of nzb-file. For URLs can be empty, then the filename is read from URL download response
	char m_category[NZBREQUESTFILENAMESIZE]; // Category, can be empty
	int32 m_addFirst; // 1 - add file to the top of download queue
	int32 m_addPaused; // 1 - pause added files
	int32 m_priority; // Priority for files (0 - default)
	int32 m_dupeScore; // Duplicate score
	int32 m_dupeMode; // Duplicate mode (EDupeMode)
	char m_dupeKey[NZBREQUESTFILENAMESIZE]; // Duplicate key
	int32 m_trailingDataLength; // Length of nzb-file in bytes
	//char m_content[m_trailingDataLength]; // variable sized
};

// A download response
struct SNzbDownloadResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_success; // 0 - command failed, 1 - command executed successfully
	int32 m_trailingDataLength; // Length of Text-string (m_szText), following to this record
	//char m_text[m_trailingDataLength]; // variable sized
};

// A list and status request
struct SNzbListRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
	int32 m_fileList; // 1 - return file list
	int32 m_serverState; // 1 - return server state
	int32 m_matchMode; // File/Group match mode, see enum eRemoteMatchMode (only values eRemoteMatchModeID (no filter) and eRemoteMatchModeRegEx are allowed)
	int32 m_matchGroup; // 0 - match files; 1 - match nzbs (when m_iMatchMode == eRemoteMatchModeRegEx)
	char m_pattern[NZBREQUESTFILENAMESIZE]; // RegEx Pattern (when m_iMatchMode == eRemoteMatchModeRegEx)
};

// A list response
struct SNzbListResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_entrySize; // Size of the SNZBListResponseEntry-struct
	int32 m_remainingSizeLo; // Remaining size in bytes, Low 32-bits of 64-bit value
	int32 m_remainingSizeHi; // Remaining size in bytes, High 32-bits of 64-bit value
	int32 m_downloadRate; // Current download speed, in Bytes pro Second
	int32 m_downloadLimit; // Current download limit, in Bytes pro Second
	int32 m_downloadPaused; // 1 - download queue is currently in paused-state
	int32 m_download2Paused; // 1 - download queue is currently in paused-state (second pause-register)
	int32 m_downloadStandBy; // 0 - there are currently downloads running, 1 - no downloads in progress (download queue paused or all download jobs completed)
	int32 m_postPaused; // 1 - post-processor queue is currently in paused-state
	int32 m_scanPaused; // 1 - scaning of incoming directory is currently in paused-state
	int32 m_threadCount; // Number of threads running
	int32 m_postJobCount; // Number of jobs in post-processor queue (including current job)
	int32 m_upTimeSec; // Server up time in seconds
	int32 m_downloadTimeSec; // Server download time in seconds (up_time - standby_time)
	int32 m_downloadedBytesLo; // Amount of data downloaded since server start, Low 32-bits of 64-bit value
	int32 m_downloadedBytesHi; // Amount of data downloaded since server start, High 32-bits of 64-bit value
	int32 m_regExValid; // 0 - error in RegEx-pattern, 1 - RegEx-pattern is valid (only when Request has eRemoteMatchModeRegEx)
	int32 m_nrTrailingNzbEntries; // Number of List-NZB-entries, following to this structure
	int32 m_nrTrailingPPPEntries; // Number of List-PPP-entries, following to this structure
	int32 m_nrTrailingFileEntries; // Number of List-File-entries, following to this structure
	int32 m_trailingDataLength; // Length of all List-entries, following to this structure
	// SNzbListResponseEntry m_nzbEntries[m_nrTrailingNZBEntries] // variable sized
	// SNzbListResponseEntry m_pppEntries[m_nrTrailingPPPEntries] // variable sized
	// SNzbListResponseEntry m_fileEntries[m_nrTrailingFileEntries] // variable sized
};

// A list response nzb entry
struct SNzbListResponseNzbEntry
{
	int32 m_id; // NZB-ID
	int32 m_kind; // Item Kind (see NZBInfo::Kind)
	int32 m_sizeLo; // Size of all files in bytes, Low 32-bits of 64-bit value
	int32 m_sizeHi; // Size of all files in bytes, High 32-bits of 64-bit value
	int32 m_remainingSizeLo; // Size of remaining (unpaused) files in bytes, Low 32-bits of 64-bit value
	int32 m_remainingSizeHi; // Size of remaining (unpaused) files in bytes, High 32-bits of 64-bit value
	int32 m_pausedSizeLo; // Size of npaused files in bytes, Low 32-bits of 64-bit value
	int32 m_pausedSizeHi; // Size of paused files in bytes, High 32-bits of 64-bit value
	int32 m_pausedCount; // Number of paused files
	int32 m_remainingParCount; // Number of remaining par-files
	int32 m_priority; // Download priority
	int32 m_match; // 1 - group matches the pattern (only when Request has eRemoteMatchModeRegEx)
	int32 m_filenameLen; // Length of Filename-string (m_szFilename), following to this record
	int32 m_nameLen; // Length of Name-string (m_szName), following to this record
	int32 m_destDirLen; // Length of DestDir-string (m_szDestDir), following to this record
	int32 m_categoryLen; // Length of Category-string (m_szCategory), following to this record
	int32 m_queuedFilenameLen; // Length of queued file name (m_szQueuedFilename), following to this record
	//char m_filename[m_filenameLen]; // variable sized
	//char m_name[m_nameLen]; // variable sized
	//char m_destDir[m_destDirLen]; // variable sized
	//char m_dategory[m_categoryLen]; // variable sized
	//char m_queuedFilename[m_queuedFilenameLen]; // variable sized
};

// A list response pp-parameter entry
struct SNzbListResponsePPPEntry
{
	int32 m_nzbIndex; // Index of NZB-Entry in m_NZBEntries-list
	int32 m_nameLen; // Length of Name-string (m_szName), following to this record
	int32 m_valueLen; // Length of Value-string (m_szValue), following to this record
	//char m_name[m_nameLen]; // variable sized
	//char m_value[m_valueLen]; // variable sized
};

// A list response file entry
struct SNzbListResponseFileEntry
{
	int32 m_id; // Entry-ID
	int32 m_nzbIndex; // Index of NZB-Entry in m_NZBEntries-list
	int32 m_fileSizeLo; // Filesize in bytes, Low 32-bits of 64-bit value
	int32 m_fileSizeHi; // Filesize in bytes, High 32-bits of 64-bit value
	int32 m_remainingSizeLo; // Remaining size in bytes, Low 32-bits of 64-bit value
	int32 m_remainingSizeHi; // Remaining size in bytes, High 32-bits of 64-bit value
	int32 m_paused; // 1 - file is paused
	int32 m_filenameConfirmed; // 1 - Filename confirmed (read from article body), 0 - Filename parsed from subject (can be changed after reading of article)
	int32 m_activeDownloads; // Number of active downloads for this file
	int32 m_match; // 1 - file matches the pattern (only when Request has eRemoteMatchModeRegEx)
	int32 m_subjectLen; // Length of Subject-string (m_szSubject), following to this record
	int32 m_filenameLen; // Length of Filename-string (m_szFilename), following to this record
	//char m_subject[m_subjectLen]; // variable sized
	//char m_filename[m_filenameLen]; // variable sized
};

// A log request
struct SNzbLogRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
	int32 m_idFrom; // Only one of these two parameters
	int32 m_lines; // can be set. The another one must be set to "0".
};

// A log response
struct SNzbLogResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_entrySize; // Size of the SNZBLogResponseEntry-struct
	int32 m_nrTrailingEntries; // Number of Log-entries, following to this structure
	int32 m_trailingDataLength; // Length of all Log-entries, following to this structure
	// SNZBLogResponseEntry m_entries[m_trailingEntries] // variable sized
};

// A log response entry
struct SNzbLogResponseEntry
{
	int32 m_id; // ID of Log-entry
	int32 m_kind; // see Message::Kind in "Log.h"
	int32 m_time; // time since the Epoch (00:00:00 UTC, January 1, 1970), measured in seconds.
	int32 m_textLen; // Length of Text-string (m_szText), following to this record
	//char m_text[m_textLen]; // variable sized
};

// A Pause/Unpause request
struct SNzbPauseUnpauseRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
	int32 m_pause; // 1 - server must be paused, 0 - server must be unpaused
	int32 m_action; // Action to be executed, see enum ERemotePauseUnpauseAction
};

// A Pause/Unpause response
struct SNzbPauseUnpauseResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_success; // 0 - command failed, 1 - command executed successfully
	int32 m_trailingDataLength; // Length of Text-string (m_szText), following to this record
	//char m_text[m_trailingDataLength]; // variable sized
};

// Request setting the download rate
struct SNzbSetDownloadRateRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
	int32 m_downloadRate; // Speed limit, in Bytes pro Second
};

// A setting download rate response
struct SNzbSetDownloadRateResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_success; // 0 - command failed, 1 - command executed successfully
	int32 m_trailingDataLength; // Length of Text-string (m_szText), following to this record
								//char m_text[m_trailingDataLength]; // variable sized
};

// edit queue request
struct SNzbEditQueueRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
	int32 m_action; // Action to be executed, see enum DownloadQueue::EEditAction
	int32 m_offset; // Offset to move (for m_iAction = 0)
	int32 m_matchMode; // File/Group match mode, see enum eRemoteMatchMode
	int32 m_nrTrailingIdEntries; // Number of ID-entries, following to this structure
	int32 m_nrTrailingNameEntries; // Number of Name-entries, following to this structure
	int32 m_trailingNameEntriesLen; // Length of all Name-entries, following to this structure
	int32 m_textLen; // Length of Text-string (m_szText), following to this record
	int32 m_trailingDataLength; // Length of Text-string and all ID-entries, following to this structure
	//char m_text[m_textLen]; // variable sized
	//int32 m_ids[m_nrTrailingIdEntries]; // variable sized array of IDs. For File-Actions - ID of file, for Group-Actions - ID of any file belonging to group
	//char* m_names[m_nrTrailingNameEntries]; // variable sized array of strings. For File-Actions - name of file incl. nzb-name as path, for Group-Actions - name of group
};

// An edit queue response
struct SNzbEditQueueResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_success; // 0 - command failed, 1 - command executed successfully
	int32 m_trailingDataLength; // Length of Text-string (m_szText), following to this record
	//char m_text[m_trailingDataLength]; // variable sized
};

// Request dumping of debug info
struct SNzbDumpDebugRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
};

// Dumping of debug response
struct SNzbDumpDebugResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_success; // 0 - command failed, 1 - command executed successfully
	int32 m_trailingDataLength; // Length of Text-string (m_szText), following to this record
	//char m_text[m_trailingDataLength]; // variable sized
};

// Shutdown server request
struct SNzbShutdownRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
};

// Shutdown server response
struct SNzbShutdownResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_success; // 0 - command failed, 1 - command executed successfully
	int32 m_trailingDataLength; // Length of Text-string (m_szText), following to this record
	//char m_text[m_trailingDataLength]; // variable sized
};

// Reload server request
struct SNzbReloadRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
};

// Reload server response
struct SNzbReloadResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_success; // 0 - command failed, 1 - command executed successfully
	int32 m_trailingDataLength; // Length of Text-string (m_szText), following to this record
	//char m_text[m_trailingDataLength]; // variable sized
};

// Server version request
struct SNzbVersionRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
};

// Server version response
struct SNzbVersionResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_success; // 0 - command failed, 1 - command executed successfully
	int32 m_trailingDataLength; // Length of Text-string (m_szText), following to this record
	//char m_text[m_trailingDataLength]; // variable sized
};

// PostQueue request
struct SNzbPostQueueRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
};

// A PostQueue response
struct SNzbPostQueueResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_entrySize; // Size of the SNZBPostQueueResponseEntry-struct
	int32 m_nrTrailingEntries; // Number of PostQueue-entries, following to this structure
	int32 m_trailingDataLength; // Length of all PostQueue-entries, following to this structure
	// SNZBPostQueueResponseEntry m_entries[m_nrTrailingEntries] // variable sized
};

// A PostQueue response entry
struct SNzbPostQueueResponseEntry
{
	int32 m_id; // ID of Post-entry
	int32 m_stage; // See PrePostProcessor::EPostJobStage
	int32 m_stageProgress; // Progress of current stage, value in range 0..1000
	int32 m_fileProgress; // Progress of current file, value in range 0..1000
	int32 m_totalTimeSec; // Number of seconds this post-job is beeing processed (after it first changed the state from QUEUED).
	int32 m_stageTimeSec; // Number of seconds the current stage is beeing processed.
	int32 m_nzbFilenameLen; // Length of NZBFileName-string (m_szNZBFilename), following to this record
	int32 m_infoNameLen; // Length of Filename-string (m_szFilename), following to this record
	int32 m_destDirLen; // Length of DestDir-string (m_szDestDir), following to this record
	int32 m_progressLabelLen; // Length of ProgressLabel-string (m_szProgressLabel), following to this record
	//char m_nzbFilename[m_nzbFilenameLen]; // variable sized, may contain full path (local path on client) or only filename
	//char m_infoName[m_infoNameLen]; // variable sized
	//char m_destDir[m_destDirLen]; // variable sized
	//char m_progressLabel[m_progressLabelLen]; // variable sized
};

// Write log request
struct SNzbWriteLogRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
	int32 m_kind; // see Message::Kind in "Log.h"
	int32 m_trailingDataLength; // Length of nzb-file in bytes
	//char m_text[m_trailingDataLength]; // variable sized
};

// Write log response
struct SNzbWriteLogResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_success; // 0 - command failed, 1 - command executed successfully
	int32 m_trailingDataLength; // Length of Text-string (m_szText), following to this record
	//char m_text[m_trailingDataLength]; // variable sized
};

// Scan nzb directory request
struct SNzbScanRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
	int32 m_syncMode; // 0 - asynchronous Scan (the command returns immediately), 1 - synchronous Scan (the command returns when the scan is completed)
};

// Scan nzb directory response
struct SNzbScanResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_success; // 0 - command failed, 1 - command executed successfully
	int32 m_trailingDataLength; // Length of Text-string (m_szText), following to this record
	//char m_text[m_trailingDataLength]; // variable sized
};

// A history request
struct SNzbHistoryRequest
{
	SNzbRequestBase m_messageBase; // Must be the first in the struct
	int32 m_hidden; // 0 - only return visible records, 1 - also return hidden records
};

// history response
struct SNzbHistoryResponse
{
	SNzbResponseBase m_messageBase; // Must be the first in the struct
	int32 m_entrySize; // Size of the SNZBHistoryResponseEntry-struct
	int32 m_nrTrailingEntries; // Number of History-entries, following to this structure
	int32 m_trailingDataLength; // Length of all History-entries, following to this structure
	// SNZBHistoryResponseEntry m_entries[m_nrTrailingEntries] // variable sized
};

// history entry
struct SNzbHistoryResponseEntry
{
	int32 m_id; // History-ID
	int32 m_kind; // Kind of Item: 1 - Collection (NZB), 2 - URL, 3 - DUP (hidden record)
	int32 m_time; // When the item was added to history. time since the Epoch (00:00:00 UTC, January 1, 1970), measured in seconds.
	int32 m_nicenameLen; // Length of Nicename-string (m_szNicename), following to this record
	// for Collection and Dup items (m_iKind = 1 or 2)
	int32 m_sizeLo; // Size of all files in bytes, Low 32-bits of 64-bit value
	int32 m_sizeHi; // Size of all files in bytes, High 32-bits of 64-bit value
	// for Collection items (m_iKind = 1)
	int32 m_fileCount; // Initial number of files included in NZB-file
	int32 m_parStatus; // See NZBInfo::EParStatus
	int32 m_scriptStatus; // See NZBInfo::EScriptStatus
	// for URL items (m_iKind = 2)
	int32 m_urlStatus; // See NZBInfo::EUrlStatus
	//char m_nicename[m_nicenameLen]; // variable sized
};

#endif
