package exported

import (
	"github.com/tendermint/tendermint/crypto"

	sdk "github.com/cosmos/cosmos-sdk/types"
)

// Account is an interface used to store coins at a given address within state.
// It presumes a notion of sequence numbers for replay protection,
// a notion of account numbers for replay protection for previously pruned accounts,
// and a pubkey for authentication purposes.
//
// Many complex conditions can be used in the concrete struct which implements Account.
type Account interface {
	GetAddress() sdk.AccAddress
	SetAddress(sdk.AccAddress) error // errors if already set.

	GetPubKey() crypto.PubKey // can return nil.
	SetPubKey(crypto.PubKey) error

	GetAccountNumber() uint64
	SetAccountNumber(uint64) error

	GetSequence() uint64
	SetSequence(uint64) error

	// Ensure that account implements stringer
	String() string
}

// GenesisAccounts defines a slice of GenesisAccount objects
type GenesisAccounts []GenesisAccount

// Contains returns true if the given address exists in a slice of GenesisAccount
// objects.
func (ga GenesisAccounts) Contains(addr sdk.Address) bool {
	for _, acc := range ga {
		if acc.GetAddress().Equals(addr) {
			return true
		}
	}

	return false
}

// GenesisAccount defines a genesis account that embeds an Account with validation capabilities.
type GenesisAccount interface {
	Account

	Validate() error
}