package verifreg

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

	"github.com/filecoin-project/go-address"
	"github.com/filecoin-project/go-state-types/abi"

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

	builtin0 "github.com/filecoin-project/specs-actors/actors/builtin"

	builtin2 "github.com/filecoin-project/specs-actors/v2/actors/builtin"

	builtin3 "github.com/filecoin-project/specs-actors/v3/actors/builtin"

	builtin4 "github.com/filecoin-project/specs-actors/v4/actors/builtin"

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

func init() {

	builtin.RegisterActorState(builtin0.VerifiedRegistryActorCodeID, func(store adt.Store, root cid.Cid) (cbor.Marshaler, error) {
		return load0(store, root)
	})

	builtin.RegisterActorState(builtin2.VerifiedRegistryActorCodeID, func(store adt.Store, root cid.Cid) (cbor.Marshaler, error) {
		return load2(store, root)
	})

	builtin.RegisterActorState(builtin3.VerifiedRegistryActorCodeID, func(store adt.Store, root cid.Cid) (cbor.Marshaler, error) {
		return load3(store, root)
	})

	builtin.RegisterActorState(builtin4.VerifiedRegistryActorCodeID, func(store adt.Store, root cid.Cid) (cbor.Marshaler, error) {
		return load4(store, root)
	})

}

var (
	Address = builtin4.VerifiedRegistryActorAddr
	Methods = builtin4.MethodsVerifiedRegistry
)

func Load(store adt.Store, act *types.Actor) (State, error) {
	switch act.Code {

	case builtin0.VerifiedRegistryActorCodeID:
		return load0(store, act.Head)

	case builtin2.VerifiedRegistryActorCodeID:
		return load2(store, act.Head)

	case builtin3.VerifiedRegistryActorCodeID:
		return load3(store, act.Head)

	case builtin4.VerifiedRegistryActorCodeID:
		return load4(store, act.Head)

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

func MakeState(store adt.Store, av actors.Version, rootKeyAddress address.Address) (State, error) {
	switch av {

	case actors.Version0:
		return make0(store, rootKeyAddress)

	case actors.Version2:
		return make2(store, rootKeyAddress)

	case actors.Version3:
		return make3(store, rootKeyAddress)

	case actors.Version4:
		return make4(store, rootKeyAddress)

	}
	return nil, xerrors.Errorf("unknown actor version %d", av)
}

func GetActorCodeID(av actors.Version) (cid.Cid, error) {
	switch av {

	case actors.Version0:
		return builtin0.VerifiedRegistryActorCodeID, nil

	case actors.Version2:
		return builtin2.VerifiedRegistryActorCodeID, nil

	case actors.Version3:
		return builtin3.VerifiedRegistryActorCodeID, nil

	case actors.Version4:
		return builtin4.VerifiedRegistryActorCodeID, nil

	}

	return cid.Undef, xerrors.Errorf("unknown actor version %d", av)
}

type State interface {
	cbor.Marshaler

	RootKey() (address.Address, error)
	VerifiedClientDataCap(address.Address) (bool, abi.StoragePower, error)
	VerifierDataCap(address.Address) (bool, abi.StoragePower, error)
	ForEachVerifier(func(addr address.Address, dcap abi.StoragePower) error) error
	ForEachClient(func(addr address.Address, dcap abi.StoragePower) error) error
	GetState() interface{}
}