/*
 * This file is part of the Aaru Data Preservation Suite.
 * Copyright (c) 2019-2022 Natalia Portillo.
 *
 * This library 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 2.1 of the
 * License, or (at your option) any later version.
 *
 * This library 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 library; if not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _MSC_VER
#pragma clang diagnostic push
#pragma ide diagnostic ignored "OCUnusedGlobalDeclarationInspection"
#endif

#ifndef LIBAARUFORMAT_STRUCTS_H
#define LIBAARUFORMAT_STRUCTS_H

#pragma pack(push, 1)

#include <aaru.h>
#include <stdbool.h>
#include <stdio.h>

#include "enums.h"

/**Header, at start of file */
typedef struct AaruHeader
{
    /**Header identifier, <see cref="AARU_MAGIC" /> */
    uint64_t identifier;
    /**UTF-16LE name of the application that created the image */
    uint8_t  application[64];
    /**Image format major version. A new major version means a possibly incompatible change of format */
    uint8_t  imageMajorVersion;
    /**Image format minor version. A new minor version indicates a compatible change of format */
    uint8_t  imageMinorVersion;
    /**Major version of the application that created the image */
    uint8_t  applicationMajorVersion;
    /**Minor version of the application that created the image */
    uint8_t  applicationMinorVersion;
    /**Type of media contained on image */
    uint32_t mediaType;
    /**Offset to index */
    uint64_t indexOffset;
    /**Windows filetime (100 nanoseconds since 1601/01/01 00:00:00 UTC) of image creation time */
    int64_t  creationTime;
    /**Windows filetime (100 nanoseconds since 1601/01/01 00:00:00 UTC) of image last written time */
    int64_t  lastWrittenTime;
} AaruHeader;

#define HEADER_APP_NAME_LEN 64
#define GUID_SIZE 16

/**Header, at start of file */
typedef struct AaruHeaderV2 {
    /**Header identifier, see AARU_MAGIC */
    uint64_t identifier;
    /**UTF-16LE name of the application that created the image */
    uint8_t application[HEADER_APP_NAME_LEN];
    /**Image format major version. A new major version means a possibly incompatible change of format */
    uint8_t imageMajorVersion;
    /**Image format minor version. A new minor version indicates a compatible change of format */
    uint8_t imageMinorVersion;
    /**Major version of the application that created the image */
    uint8_t applicationMajorVersion;
    /**Minor version of the application that created the image */
    uint8_t applicationMinorVersion;
    /**Type of media contained on image */
    uint32_t mediaType;
    /**Offset to index */
    uint64_t indexOffset;
    /**Windows filetime (100 nanoseconds since 1601/01/01 00:00:00 UTC) of image creation time */
    int64_t creationTime;
    /**Windows filetime (100 nanoseconds since 1601/01/01 00:00:00 UTC) of image last written time */
    int64_t lastWrittenTime;
    /**Unique identifier that allows children images to recognize and find this image.*/
    uint8_t guid[GUID_SIZE];
    /**Block alignment shift. All blocks in the image are aligned at 2 << blockAlignmentShift bytes */
    uint8_t blockAlignmentShift;
    /**Data shift. All data blocks in the image contain 2 << dataShift items at most */
    uint8_t dataShift;
    /**Table shift. All deduplication tables in the image use this shift to calculate the position of an item */
    uint8_t tableShift;
    /**Features used in this image that if unsupported are still compatible for reading and writing implementations */
    uint64_t featureCompatible;
    /**Features used in this image that if unsupported are still compatible for reading implementations but not for writing */
    uint64_t featureCompatibleRo;
    /**Featured used in this image that if unsupported prevent reading or writing the image*/
    uint64_t featureIncompatible;
} AaruHeaderV2;

/**Header for a deduplication table. Table follows it */
typedef struct DdtHeader
{
    /**Identifier, <see cref="BlockType.DeDuplicationTable" /> */
    uint32_t identifier;
    /**Type of data pointed by this DDT */
    uint32_t type;
    /**Compression algorithm used to compress the DDT */
    uint16_t compression;
    /**Each entry is ((uint8_t offset in file) &lt;&lt; shift) + (sector offset in block) */
    uint8_t  shift;
    /**How many entries are in the table */
    uint64_t entries;
    /**Compressed length for the DDT */
    uint64_t cmpLength;
    /**Uncompressed length for the DDT */
    uint64_t length;
    /**CRC64-ECMA of the compressed DDT */
    uint64_t cmpCrc64;
    /**CRC64-ECMA of the uncompressed DDT */
    uint64_t crc64;
} DdtHeader;

/**Header for the index, followed by entries */
typedef struct IndexHeader
{
    /**Identifier, <see cref="BlockType.Index" /> */
    uint32_t identifier;
    /**How many entries follow this header */
    uint16_t entries;
    /**CRC64-ECMA of the index */
    uint64_t crc64;
} IndexHeader;

/**Index entry */
typedef struct IndexEntry
{
    /**Type of item pointed by this entry */
    uint32_t blockType;
    /**Type of data contained by the block pointed by this entry */
    uint32_t dataType;
    /**Offset in file where item is stored */
    uint64_t offset;
} IndexEntry;

/**Block header, precedes block data */
typedef struct BlockHeader
{
    /**Identifier, <see cref="BlockType.DataBlock" /> */
    uint32_t identifier;
    /**Type of data contained by this block */
    uint32_t type;
    /**Compression algorithm used to compress the block */
    uint16_t compression;
    /**Size in uint8_ts of each sector contained in this block */
    uint32_t sectorSize;
    /**Compressed length for the block */
    uint32_t cmpLength;
    /**Uncompressed length for the block */
    uint32_t length;
    /**CRC64-ECMA of the compressed block */
    uint64_t cmpCrc64;
    /**CRC64-ECMA of the uncompressed block */
    uint64_t crc64;
} BlockHeader;

/**Geometry block, contains physical geometry information */
typedef struct GeometryBlockHeader
{
    /**Identifier, <see cref="BlockType.GeometryBlock" /> */
    uint32_t identifier;
    uint32_t cylinders;
    uint32_t heads;
    uint32_t sectorsPerTrack;
} GeometryBlockHeader;

/**Metadata block, contains metadata */
typedef struct MetadataBlockHeader
{
    /**Identifier, <see cref="BlockType.MetadataBlock" /> */
    uint32_t identifier;
    /**Size in uint8_ts of this whole metadata block */
    uint32_t blockSize;
    /**Sequence of media set this media beint64_ts to */
    int32_t  mediaSequence;
    /**Total number of media on the media set this media beint64_ts to */
    int32_t  lastMediaSequence;
    /**Offset to start of creator string from start of this block */
    uint32_t creatorOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t creatorLength;
    /**Offset to start of creator string from start of this block */
    uint32_t commentsOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t commentsLength;
    /**Offset to start of creator string from start of this block */
    uint32_t mediaTitleOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t mediaTitleLength;
    /**Offset to start of creator string from start of this block */
    uint32_t mediaManufacturerOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t mediaManufacturerLength;
    /**Offset to start of creator string from start of this block */
    uint32_t mediaModelOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t mediaModelLength;
    /**Offset to start of creator string from start of this block */
    uint32_t mediaSerialNumberOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t mediaSerialNumberLength;
    /**Offset to start of creator string from start of this block */
    uint32_t mediaBarcodeOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t mediaBarcodeLength;
    /**Offset to start of creator string from start of this block */
    uint32_t mediaPartNumberOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t mediaPartNumberLength;
    /**Offset to start of creator string from start of this block */
    uint32_t driveManufacturerOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t driveManufacturerLength;
    /**Offset to start of creator string from start of this block */
    uint32_t driveModelOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t driveModelLength;
    /**Offset to start of creator string from start of this block */
    uint32_t driveSerialNumberOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t driveSerialNumberLength;
    /**Offset to start of creator string from start of this block */
    uint32_t driveFirmwareRevisionOffset;
    /**Length in uint8_ts of the null-terminated UTF-16LE creator string */
    uint32_t driveFirmwareRevisionLength;
} MetadataBlockHeader;

/**Contains list of optical disc tracks */
typedef struct TracksHeader
{
    /**Identifier, <see cref="BlockType.TracksBlock" /> */
    uint32_t identifier;
    /**How many entries follow this header */
    uint16_t entries;
    /**CRC64-ECMA of the block */
    uint64_t crc64;
} TracksHeader;

/**Optical disc track */
typedef struct TrackEntry
{
    /**Track sequence */
    uint8_t sequence;
    /**Track type */
    uint8_t type;
    /**Track starting LBA */
    int64_t start;
    /**Track last LBA */
    int64_t end;
    /**Track pregap in sectors */
    int64_t pregap;
    /**Track session */
    uint8_t session;
    /**Track's ISRC in ASCII */
    uint8_t isrc[13];
    /**Track flags */
    uint8_t flags;
} TrackEntry;

/**Geometry block, contains physical geometry information */
typedef struct CicmMetadataBlock
{
    /**Identifier, <see cref="BlockType.CicmBlock" /> */
    uint32_t identifier;
    uint32_t length;
} CicmMetadataBlock;

/**Dump hardware block, contains a list of hardware used to dump the media on this image */
typedef struct DumpHardwareHeader
{
    /**Identifier, <see cref="BlockType.DumpHardwareBlock" /> */
    uint32_t identifier;
    /**How many entries follow this header */
    uint16_t entries;
    /**Size of the whole block, not including this header, in uint8_ts */
    uint32_t length;
    /**CRC64-ECMA of the block */
    uint64_t crc64;
} DumpHardwareHeader;

/**Dump hardware entry, contains length of strings that follow, in the same order as the length, this structure */
typedef struct DumpHardwareEntry
{
    /**Length of UTF-8 manufacturer string */
    uint32_t manufacturerLength;
    /**Length of UTF-8 model string */
    uint32_t modelLength;
    /**Length of UTF-8 revision string */
    uint32_t revisionLength;
    /**Length of UTF-8 firmware version string */
    uint32_t firmwareLength;
    /**Length of UTF-8 serial string */
    uint32_t serialLength;
    /**Length of UTF-8 software name string */
    uint32_t softwareNameLength;
    /**Length of UTF-8 software version string */
    uint32_t softwareVersionLength;
    /**Length of UTF-8 software operating system string */
    uint32_t softwareOperatingSystemLength;
    /**How many extents are after the strings */
    uint32_t extents;
} DumpHardwareEntry;

/**
 *     Checksum block, contains a checksum of all user data sectors (except for optical discs that is 2352 uint8_ts raw
 *     sector if available
 *  */
typedef struct ChecksumHeader
{
    /**Identifier, <see cref="BlockType.ChecksumBlock" /> */
    uint32_t identifier;
    /**Length in uint8_ts of the block */
    uint32_t length;
    /**How many checksums follow */
    uint8_t  entries;
} ChecksumHeader;

/**Checksum entry, followed by checksum data itself */
typedef struct ChecksumEntry
{
    /**Checksum algorithm */
    uint8_t  type;
    /**Length in uint8_ts of checksum that follows this structure */
    uint32_t length;
} ChecksumEntry;

typedef struct Crc64Context
{
    uint64_t finalSeed;
    uint64_t table[256];
    uint64_t hashInt;
} Crc64Context;

typedef struct CdEccContext
{
    bool      initedEdc;
    uint8_t  *eccBTable;
    uint8_t  *eccFTable;
    uint32_t *edcTable;
} CdEccContext;

#pragma pack(pop)

#endif  // LIBAARUFORMAT_STRUCTS_H

#ifndef _MSC_VER
#pragma clang diagnostic pop
#endif