package repo

import (
	"errors"

	"github.com/ipfs/go-datastore"
	"github.com/multiformats/go-multiaddr"

	"github.com/filecoin-project/sector-storage/fsutil"
	"github.com/filecoin-project/sector-storage/stores"

	"github.com/filecoin-project/lotus/chain/types"
)

var (
	ErrNoAPIEndpoint     = errors.New("API not running (no endpoint)")
	ErrNoAPIToken        = errors.New("API token not set")
	ErrRepoAlreadyLocked = errors.New("repo is already locked (lotus daemon already running)")
	ErrClosedRepo        = errors.New("repo is no longer open")
)

type Repo interface {
	// APIEndpoint returns multiaddress for communication with Lotus API
	APIEndpoint() (multiaddr.Multiaddr, error)

	// APIToken returns JWT API Token for use in operations that require auth
	APIToken() ([]byte, error)

	// Lock locks the repo for exclusive use.
	Lock(RepoType) (LockedRepo, error)
}

type LockedRepo interface {
	// Close closes repo and removes lock.
	Close() error

	// Returns datastore defined in this repo.
	Datastore(namespace string) (datastore.Batching, error)
	ListDatastores(namespace string) ([]int64, error)
	DeleteDatastore(namespace string) error

	// Returns config in this repo
	Config() (interface{}, error)
	SetConfig(func(interface{})) error

	GetStorage() (stores.StorageConfig, error)
	SetStorage(func(*stores.StorageConfig)) error
	Stat(path string) (fsutil.FsStat, error)
	DiskUsage(path string) (int64, error)

	// SetAPIEndpoint sets the endpoint of the current API
	// so it can be read by API clients
	SetAPIEndpoint(multiaddr.Multiaddr) error

	// SetAPIToken sets JWT API Token for CLI
	SetAPIToken([]byte) error

	// KeyStore returns store of private keys for Filecoin transactions
	KeyStore() (types.KeyStore, error)

	// Path returns absolute path of the repo
	Path() string
}