package keyring

import (
	"github.com/cosmos/cosmos-sdk/crypto/hd"
	cryptotypes "github.com/cosmos/cosmos-sdk/crypto/types"
)

// Language is a language to create the BIP 39 mnemonic in.
// Currently, only english is supported though.
// Find a list of all supported languages in the BIP 39 spec (word lists).
type Language int

const (
	// English is the default language to create a mnemonic.
	// It is the only supported language by this package.
	English Language = iota + 1
	// Japanese is currently not supported.
	Japanese
	// Korean is currently not supported.
	Korean
	// Spanish is currently not supported.
	Spanish
	// ChineseSimplified is currently not supported.
	ChineseSimplified
	// ChineseTraditional is currently not supported.
	ChineseTraditional
	// French is currently not supported.
	French
	// Italian is currently not supported.
	Italian
)

const (
	// DefaultBIP39Passphrase used for deriving seed from mnemonic
	DefaultBIP39Passphrase = ""

	// bits of entropy to draw when creating a mnemonic
	defaultEntropySize = 256
	addressSuffix      = "address"
	infoSuffix         = "info"
)

// KeyType reflects a human-readable type for key listing.
type KeyType uint

// Info KeyTypes
const (
	TypeLocal   KeyType = 0
	TypeLedger  KeyType = 1
	TypeOffline KeyType = 2
	TypeMulti   KeyType = 3
)

var keyTypes = map[KeyType]string{
	TypeLocal:   "local",
	TypeLedger:  "ledger",
	TypeOffline: "offline",
	TypeMulti:   "multi",
}

// String implements the stringer interface for KeyType.
func (kt KeyType) String() string {
	return keyTypes[kt]
}

type (
	// DeriveKeyFunc defines the function to derive a new key from a seed and hd path
	DeriveKeyFunc func(mnemonic string, bip39Passphrase, hdPath string, algo hd.PubKeyType) ([]byte, error)
	// PrivKeyGenFunc defines the function to convert derived key bytes to a tendermint private key
	PrivKeyGenFunc func(bz []byte, algo hd.PubKeyType) (cryptotypes.PrivKey, error)
)