package builtin

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

	{{range .versions}}
		builtin{{.}} "github.com/filecoin-project/specs-actors{{import .}}actors/builtin"
		smoothing{{.}} "github.com/filecoin-project/specs-actors{{import .}}actors/util/smoothing"
	{{end}}

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

	miner{{.latestVersion}} "github.com/filecoin-project/specs-actors{{import .latestVersion}}actors/builtin/miner"
	proof{{.latestVersion}} "github.com/filecoin-project/specs-actors{{import .latestVersion}}actors/runtime/proof"
)

var SystemActorAddr = builtin{{.latestVersion}}.SystemActorAddr
var BurntFundsActorAddr = builtin{{.latestVersion}}.BurntFundsActorAddr
var CronActorAddr = builtin{{.latestVersion}}.CronActorAddr
var SaftAddress = makeAddress("t0122")
var ReserveAddress = makeAddress("t090")
var RootVerifierAddress = makeAddress("t080")

var (
	ExpectedLeadersPerEpoch = builtin{{.latestVersion}}.ExpectedLeadersPerEpoch
)

const (
	EpochDurationSeconds = builtin{{.latestVersion}}.EpochDurationSeconds
	EpochsInDay          = builtin{{.latestVersion}}.EpochsInDay
	SecondsInDay         = builtin{{.latestVersion}}.SecondsInDay
)

const (
	MethodSend        = builtin{{.latestVersion}}.MethodSend
	MethodConstructor = builtin{{.latestVersion}}.MethodConstructor
)

// These are all just type aliases across actor versions. In the future, that might change
// and we might need to do something fancier.
type SectorInfo = proof{{.latestVersion}}.SectorInfo
type ExtendedSectorInfo = proof{{.latestVersion}}.ExtendedSectorInfo
type PoStProof = proof{{.latestVersion}}.PoStProof
type FilterEstimate = smoothing0.FilterEstimate

func QAPowerForWeight(size abi.SectorSize, duration abi.ChainEpoch, dealWeight, verifiedWeight abi.DealWeight) abi.StoragePower {
	return miner{{.latestVersion}}.QAPowerForWeight(size, duration, dealWeight, verifiedWeight)
}

{{range .versions}}
	func FromV{{.}}FilterEstimate(v{{.}} smoothing{{.}}.FilterEstimate) FilterEstimate {
	{{if (eq . 0)}}
		return (FilterEstimate)(v{{.}}) //nolint:unconvert
	{{else}}
		return (FilterEstimate)(v{{.}})
	{{end}}
	}
{{end}}

type ActorStateLoader func(store adt.Store, root cid.Cid) (cbor.Marshaler, error)

var ActorStateLoaders = make(map[cid.Cid]ActorStateLoader)

func RegisterActorState(code cid.Cid, loader ActorStateLoader) {
	ActorStateLoaders[code] = loader
}

func Load(store adt.Store, act *types.Actor) (cbor.Marshaler, error) {
	loader, found := ActorStateLoaders[act.Code]
	if !found {
		return nil, xerrors.Errorf("unknown actor code %s", act.Code)
	}
	return loader(store, act.Head)
}

func ActorNameByCode(c cid.Cid) string {
	name, _, ok := actors.GetActorMetaByCode(c)
    if ok {
    	return name
	}

	switch {
		{{range .versions}}
			case builtin{{.}}.IsBuiltinActor(c):
			return builtin{{.}}.ActorNameByCode(c)
		{{end}}
	default:
		return "<unknown>"
	}
}

func IsBuiltinActor(c cid.Cid) bool {
	_, _, ok := actors.GetActorMetaByCode(c)
    if ok {
    	return true
	}

	{{range .versions}}
		if builtin{{.}}.IsBuiltinActor(c) {
			return true
		}
	{{end}}
	return false
}

func IsAccountActor(c cid.Cid) bool {
	name, _, ok := actors.GetActorMetaByCode(c)
    if ok {
    	return name == "account"
	}

	{{range .versions}}
		if c == builtin{{.}}.AccountActorCodeID {
			return true
		}
	{{end}}
	return false
}

func IsStorageMinerActor(c cid.Cid) bool {
	name, _, ok := actors.GetActorMetaByCode(c)
    if ok {
    	return name == "storageminer"
	}

	{{range .versions}}
		if c == builtin{{.}}.StorageMinerActorCodeID {
			return true
		}
	{{end}}
	return false
}

func IsMultisigActor(c cid.Cid) bool {
	name, _, ok := actors.GetActorMetaByCode(c)
    if ok {
    	return name == "multisig"
	}

	{{range .versions}}
		if c == builtin{{.}}.MultisigActorCodeID {
			return true
		}
	{{end}}
	return false
}

func IsPaymentChannelActor(c cid.Cid) bool {
	name, _, ok := actors.GetActorMetaByCode(c)
    if ok {
    	return name == "paymentchannel"
	}

	{{range .versions}}
		if c == builtin{{.}}.PaymentChannelActorCodeID {
			return true
		}
	{{end}}
	return false
}

func makeAddress(addr string) address.Address {
	ret, err := address.NewFromString(addr)
	if err != nil {
		panic(err)
	}

	return ret
}