// SPDX-FileCopyrightText: 2026 Terin Stock <terinjokes@gmail.com>
// SPDX-License-Identifier: EUPL-1.2

package toolbox

import (
	"strings"
)

const (
	TOOLBOX_COUNT_CDS    = 0xDA
	TOOLBOX_LIST_CDS     = 0xD7
	TOOLBOX_SET_NEXT_CD  = 0xD8
	TOOLBOX_LIST_DEVICES = 0xD9
)

// FileType represents the type of file in a [FileEntry].
type FileType uint8

const (
	File FileType = iota
	Directory
)

// DeviceType represents the type of emulated device.
type DeviceType uint8

const (
	Fixed DeviceType = iota
	Removeable
	Optical
	Floppy14MB
	MO
	Sequential
	Network
	Zip100

	None DeviceType = 0xFF
)

// FileEntry describes each file recognized by the ODE as
// emulatable media.
type FileEntry [40]byte

// Index is the file's index, to be used with [Device.SetCDByIndex].
func (e *FileEntry) Index() int {
	return int(e[0])
}

// FileType returns the entry's file type.
func (e *FileEntry) FileType() FileType {
	return FileType(e[1])
}

// Name is the entry's name, truncated to 32 characters.
func (e *FileEntry) Name() string {
	str := string(e[2:35])
	idx := strings.IndexByte(str, 0)
	if idx < 0 {
		idx = 33
	}
	return str[:idx]
}

// Size returns the size of the entry in bytes.
func (e *FileEntry) Size() uint64 {
	return uint64(e[36])<<24 | uint64(e[37])<<16 | uint64(e[38])<<8 | uint64(e[39])
}