package identifiers

import "errors"

var (
	GlobalPlatformDefaultKey = []byte{0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f}
	KeycardDevelopmentKey    = []byte{0xc2, 0x12, 0xe0, 0x73, 0xff, 0x8b, 0x4b, 0xbf, 0xaf, 0xf4, 0xde, 0x8a, 0xb6, 0x55, 0x22, 0x1f}

	PackageAID = []byte{0xA0, 0x00, 0x00, 0x08, 0x04, 0x00, 0x01}

	KeycardAID = []byte{0xA0, 0x00, 0x00, 0x08, 0x04, 0x00, 0x01, 0x01}

	NdefAID         = []byte{0xA0, 0x00, 0x00, 0x08, 0x04, 0x00, 0x01, 0x02}
	NdefInstanceAID = []byte{0xD2, 0x76, 0x00, 0x00, 0x85, 0x01, 0x01}

	CashAID         = []byte{0xA0, 0x00, 0x00, 0x08, 0x04, 0x00, 0x01, 0x03}
	CashInstanceAID = []byte{0xA0, 0x00, 0x00, 0x08, 0x04, 0x00, 0x01, 0x03, 0x01}

	KeycardDefaultInstanceIndex = 1

	ErrInvalidInstanceIndex = errors.New("instance index must be between 1 and 255")
)

func KeycardInstanceAID(index int) ([]byte, error) {
	if index < 0x01 || index > 0xFF {
		return nil, ErrInvalidInstanceIndex
	}

	return append(KeycardAID, byte(index)), nil
}