package evm

import (
	"github.com/ipfs/go-cid"
	"golang.org/x/xerrors"

	actorstypes "github.com/filecoin-project/go-state-types/actors"
	"github.com/filecoin-project/go-state-types/cbor"

	"github.com/filecoin-project/lotus/chain/actors"
	"github.com/filecoin-project/lotus/chain/actors/adt"
	"github.com/filecoin-project/lotus/chain/types"

	"github.com/filecoin-project/go-state-types/exitcode"
	"github.com/filecoin-project/go-state-types/manifest"

	builtin{{.latestVersion}} "github.com/filecoin-project/go-state-types/builtin"
)

var Methods = builtin{{.latestVersion}}.MethodsEVM

// See https://github.com/filecoin-project/builtin-actors/blob/6e781444cee5965278c46ef4ffe1fb1970f18d7d/actors/evm/src/lib.rs#L35-L42
const (
	ErrReverted exitcode.ExitCode = iota + 33 // EVM exit codes start at 33
	ErrInvalidInstruction
	ErrUndefinedInstruction
	ErrStackUnderflow
	ErrStackOverflow
	ErrIllegalMemoryAccess
	ErrBadJumpdest
	ErrSelfdestructFailed
)

func Load(store adt.Store, act *types.Actor) (State, error) {
	if name, av, ok := actors.GetActorMetaByCode(act.Code); ok {
       if name != manifest.EvmKey {
          return nil, xerrors.Errorf("actor code is not evm: %s", name)
       }

       switch av {
            {{range .versions}}
                case actorstypes.Version{{.}}:
                     return load{{.}}(store, act.Head)
            {{end}}
       }
	}

	return nil, xerrors.Errorf("unknown actor code %s", act.Code)
}

func MakeState(store adt.Store, av actorstypes.Version, bytecode cid.Cid) (State, error) {
	switch av {
{{range .versions}}
	case actorstypes.Version{{.}}:
		return make{{.}}(store, bytecode)
{{end}}
	default: return nil, xerrors.Errorf("evm actor only valid for actors v10 and above, got %d", av)
    }
}

type State interface {
	cbor.Marshaler

	Nonce() (uint64, error)
	IsAlive() (bool, error)
	GetState() interface{}

	GetBytecode() ([]byte, error)
	GetBytecodeCID() (cid.Cid, error)
	GetBytecodeHash() ([32]byte, error)
}