package btrfsitem

import (
	"lukeshu.com/btrfs-tools/pkg/binstruct"
	"lukeshu.com/btrfs-tools/pkg/btrfs/internal"
	"lukeshu.com/btrfs-tools/pkg/util"
)

type Inode struct { // INODE_ITEM=1
	Generation    internal.Generation `bin:"off=0x0, siz=0x8"`
	TransID       int64               `bin:"off=0x8, siz=0x8"`
	Size          int64               `bin:"off=0x10, siz=0x8"`
	NumBytes      int64               `bin:"off=0x18, siz=0x8"`
	BlockGroup    int64               `bin:"off=0x20, siz=0x8"`
	NLink         int32               `bin:"off=0x28, siz=0x4"`
	UID           int32               `bin:"off=0x2C, siz=0x4"`
	GID           int32               `bin:"off=0x30, siz=0x4"`
	Mode          int32               `bin:"off=0x34, siz=0x4"`
	RDev          int64               `bin:"off=0x38, siz=0x8"`
	Flags         InodeFlags          `bin:"off=0x40, siz=0x8"`
	Sequence      int64               `bin:"off=0x48, siz=0x8"`
	Reserved      [4]int64            `bin:"off=0x50, siz=0x20"`
	ATime         internal.Time       `bin:"off=0x70, siz=0xc"`
	CTime         internal.Time       `bin:"off=0x7c, siz=0xc"`
	MTime         internal.Time       `bin:"off=0x88, siz=0xc"`
	OTime         internal.Time       `bin:"off=0x94, siz=0xc"`
	binstruct.End `bin:"off=0xa0"`
}

type InodeFlags uint64

const (
	INODE_NODATASUM = InodeFlags(1 << iota)
	INODE_NODATACOW
	INODE_READONLY
	INODE_NOCOMPRESS
	INODE_PREALLOC
	INODE_SYNC
	INODE_IMMUTABLE
	INODE_APPEND
	INODE_NODUMP
	INODE_NOATIME
	INODE_DIRSYNC
	INODE_COMPRESS
)

var inodeFlagNames = []string{
	"NODATASUM",
	"NODATACOW",
	"READONLY",
	"NOCOMPRESS",
	"PREALLOC",
	"SYNC",
	"IMMUTABLE",
	"APPEND",
	"NODUMP",
	"NOATIME",
	"DIRSYNC",
	"COMPRESS",
}

func (f InodeFlags) Has(req InodeFlags) bool { return f&req == req }
func (f InodeFlags) String() string          { return util.BitfieldString(f, inodeFlagNames, util.HexLower) }