/* -------------------------------------------

	Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.

------------------------------------------- */

#pragma once

#include <NewKit/Defines.h>

/// @file HeFS.h
/// @brief HeFS filesystem support.

#define kHeFSVersion  (0x0100)
#define kHeFSMagic	  "  HeFS"
#define kHeFSMagicLen (8)

#define kHeFSFileNameLen (256U)
#define kHeFSPartNameLen (256U)

#define kHeFSMinimumDiskSize (mib_cast(256))

struct HeFS_BOOT_NODE;

enum
{
	kHeFSHardDrive		   = 0xC0, // Hard Drive
	kHeFSSolidStateDrive   = 0xC1, // Solid State Drive
	kHeFSOpticalDrive	   = 0x0C, // Blu-Ray/DVD
	kHeFSMassStorageDevice = 0xCC, // USB
	kHeFSScsiDrive		   = 0xC4, // SCSI Hard Drive
	kHeFSFlashDrive		   = 0xC6,
	kHeFSUnknown		   = 0xFF, // Unknown device.
	kHeFSDriveCount		   = 7,
};

enum
{
	kHeFSStatusUnlocked = 0x18,
	kHeFSStatusLocked,
	kHeFSStatusError,
	kHeFSStatusInvalid,
	kHeFSStatusCount,
};

struct PACKED HeFS_BOOT_NODE final
{
	Kernel::Char   fMagic[kHeFSMagicLen];
	Kernel::Char   fPartName[kHeFSPartNameLen];
	Kernel::UInt32 fVersion;
	Kernel::UInt64 fBadSectors;
	Kernel::UInt64 fSectorCount;
	Kernel::UInt64 fSectorSize;
	Kernel::UInt32 fChecksum;
	Kernel::UInt8  fDriveKind;
	Kernel::UInt8  fTextEncoding;
	Kernel::UInt64 fRootINode;
	Kernel::UInt64 fRecoveryINode;
};

struct PACKED HeFS_INDEX_NODE
{
	Kernel::Char   fName[kHeFSFileNameLen];
	Kernel::UInt32 fFlags;
	Kernel::UInt16 fKind;
	Kernel::UInt32 fSize;
	Kernel::Lba	   fFirstINode;
	Kernel::Lba	   fLastINode;
	Kernel::UInt32 fChecksum;
};