package hotline

import (
	"encoding/binary"
	"math/big"
)

const (
	// File System Maintenance
	accessDeleteFile   = 0
	accessUploadFile   = 1
	accessDownloadFile = 2 // Can Download Files
	accessRenameFile   = 3
	accessMoveFile     = 4
	accessCreateFolder = 5
	accessDeleteFolder = 6
	accessRenameFolder = 7
	accessMoveFolder   = 8
	accessReadChat     = 9
	accessSendChat     = 10
	accessOpenChat     = 11
	// accessCloseChat        = 12 // Documented but unused?
	// accessShowInList       = 13 // Documented but unused?
	accessCreateUser = 14
	accessDeleteUser = 15
	accessOpenUser   = 16
	accessModifyUser = 17
	// accessChangeOwnPass    = 18 // Documented but unused?
	// accessSendPrivMsg      = 19 // This doesn't do what it seems like it should do. TODO: Investigate
	accessNewsReadArt    = 20
	accessNewsPostArt    = 21
	accessDisconUser     = 22 // Toggles red user name in user list
	accessCannotBeDiscon = 23
	accessGetClientInfo  = 24
	accessUploadAnywhere = 25
	accessAnyName        = 26
	// accessNoAgreement      = 27
	accessSetFileComment   = 28
	accessSetFolderComment = 29
	accessViewDropBoxes    = 30
	accessMakeAlias        = 31
	accessBroadcast        = 32
	accessNewsDeleteArt    = 33
	accessNewsCreateCat    = 34
	// accessNewsDeleteCat    = 35
	accessNewsCreateFldr = 36
	// accessNewsDeleteFldr   = 37
)

type accessBitmap [8]byte

func (bits *accessBitmap) Set(i int) {
	bits[i/8] |= 1 << uint(7-i%8)
}

// authorize checks if 64 bit access slice contain has accessBit set
// TODO: refactor to use accessBitmap type
func authorize(access *[]byte, accessBit int) bool {
	bits := big.NewInt(int64(binary.BigEndian.Uint64(*access)))

	return bits.Bit(63-accessBit) == 1
}