package types

import (
	"encoding/json"
	"io"

	"github.com/gogo/protobuf/grpc"
	abci "github.com/tendermint/tendermint/abci/types"
	"github.com/tendermint/tendermint/libs/log"
	tmtypes "github.com/tendermint/tendermint/types"
	dbm "github.com/tendermint/tm-db"

	"github.com/cosmos/cosmos-sdk/server/api"
)

type (
	// AppOptions defines an interface that is passed into an application
	// constructor, typically used to set BaseApp options that are either supplied
	// via config file or through CLI arguments/flags. The underlying implementation
	// is defined by the server package and is typically implemented via a Viper
	// literal defined on the server Context. Note, casting Get calls may not yield
	// the expected types and could result in type assertion errors. It is recommend
	// to either use the cast package or perform manual conversion for safety.
	AppOptions interface {
		Get(string) interface{}
	}

	// Application defines an application interface that wraps abci.Application.
	// The interface defines the necessary contracts to be implemented in order
	// to fully bootstrap and start an application.
	Application interface {
		abci.Application

		RegisterAPIRoutes(*api.Server)

		// RegisterGRPCServer registers gRPC services directly with the gRPC
		// server.
		RegisterGRPCServer(grpc.Server)
	}

	// AppCreator is a function that allows us to lazily initialize an
	// application using various configurations.
	AppCreator func(log.Logger, dbm.DB, io.Writer, AppOptions) Application

	// AppExporter is a function that dumps all app state to
	// JSON-serializable structure and returns the current validator set.
	AppExporter func(log.Logger, dbm.DB, io.Writer, int64, bool, []string) (json.RawMessage, []tmtypes.GenesisValidator, *abci.ConsensusParams, error)
)