package policy

import (
	"sort"

	"github.com/filecoin-project/go-state-types/abi"
	"github.com/filecoin-project/go-state-types/network"
	"github.com/filecoin-project/lotus/chain/actors"

	{{range .versions}}
    {{if (ge . 2)}} builtin{{.}} "github.com/filecoin-project/specs-actors{{import .}}actors/builtin" {{end}}
	market{{.}} "github.com/filecoin-project/specs-actors{{import .}}actors/builtin/market"
	miner{{.}} "github.com/filecoin-project/specs-actors{{import .}}actors/builtin/miner"
	verifreg{{.}} "github.com/filecoin-project/specs-actors{{import .}}actors/builtin/verifreg"
	{{if (eq . 0)}} power{{.}} "github.com/filecoin-project/specs-actors{{import .}}actors/builtin/power" {{end}}
    {{end}}

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

const (
	ChainFinality                  = miner{{.latestVersion}}.ChainFinality
	SealRandomnessLookback         = ChainFinality
	PaychSettleDelay               = paych{{.latestVersion}}.SettleDelay
	MaxPreCommitRandomnessLookback = builtin{{.latestVersion}}.EpochsInDay + SealRandomnessLookback
)

// SetSupportedProofTypes sets supported proof types, across all actor versions.
// This should only be used for testing.
func SetSupportedProofTypes(types ...abi.RegisteredSealProof) {
	{{range .versions}}
	    {{if (eq . 0)}}
	        miner{{.}}.SupportedProofTypes = make(map[abi.RegisteredSealProof]struct{}, len(types))
	    {{else}}
            miner{{.}}.PreCommitSealProofTypesV0 = make(map[abi.RegisteredSealProof]struct{}, len(types))
            miner{{.}}.PreCommitSealProofTypesV7 = make(map[abi.RegisteredSealProof]struct{}, len(types)*2)
            miner{{.}}.PreCommitSealProofTypesV8 = make(map[abi.RegisteredSealProof]struct{}, len(types))
	    {{end}}
	{{end}}

	AddSupportedProofTypes(types...)
}

// AddSupportedProofTypes sets supported proof types, across all actor versions.
// This should only be used for testing.
func AddSupportedProofTypes(types ...abi.RegisteredSealProof) {
	for _, t := range types {
		if t >= abi.RegisteredSealProof_StackedDrg2KiBV1_1 {
			panic("must specify v1 proof types only")
		}
		// Set for all miner versions.

		{{range .versions}}
            {{if (eq . 0)}}
        	    miner{{.}}.SupportedProofTypes[t] = struct{}{}
            {{else}}
                miner{{.}}.PreCommitSealProofTypesV0[t] = struct{}{}
                miner{{.}}.PreCommitSealProofTypesV7[t] = struct{}{}
                miner{{.}}.PreCommitSealProofTypesV7[t+abi.RegisteredSealProof_StackedDrg2KiBV1_1] = struct{}{}
                miner{{.}}.PreCommitSealProofTypesV8[t+abi.RegisteredSealProof_StackedDrg2KiBV1_1] = struct{}{}
            {{end}}
        {{end}}
	}
}

// SetPreCommitChallengeDelay sets the pre-commit challenge delay across all
// actors versions. Use for testing.
func SetPreCommitChallengeDelay(delay abi.ChainEpoch) {
	// Set for all miner versions.
    {{range .versions}}
        miner{{.}}.PreCommitChallengeDelay = delay
    {{end}}
}

// TODO: this function shouldn't really exist. Instead, the API should expose the precommit delay.
func GetPreCommitChallengeDelay() abi.ChainEpoch {
	return miner{{.latestVersion}}.PreCommitChallengeDelay
}

// SetConsensusMinerMinPower sets the minimum power of an individual miner must
// meet for leader election, across all actor versions. This should only be used
// for testing.
func SetConsensusMinerMinPower(p abi.StoragePower) {
    {{range .versions}}
        {{if (eq . 0)}}
            power{{.}}.ConsensusMinerMinPower = p
        {{else if (eq . 2)}}
            for _, policy := range builtin{{.}}.SealProofPolicies {
                policy.ConsensusMinerMinPower = p
            }
        {{else}}
            for _, policy := range builtin{{.}}.PoStProofPolicies {
                policy.ConsensusMinerMinPower = p
            }
        {{end}}
    {{end}}
}

// SetMinVerifiedDealSize sets the minimum size of a verified deal. This should
// only be used for testing.
func SetMinVerifiedDealSize(size abi.StoragePower) {
    {{range .versions}}
        verifreg{{.}}.MinVerifiedDealSize = size
    {{end}}
}

func GetMaxProveCommitDuration(ver actors.Version, t abi.RegisteredSealProof) abi.ChainEpoch {
	switch ver {
		{{range .versions}}
            case actors.Version{{.}}:
                {{if (eq . 0)}}
                    return miner{{.}}.MaxSealDuration[t]
                {{else}}
                    return miner{{.}}.MaxProveCommitDuration[t]
                {{end}}
        {{end}}
    default:
        panic("unsupported actors version")
    }
}

func DealProviderCollateralBounds(
	size abi.PaddedPieceSize, verified bool,
	rawBytePower, qaPower, baselinePower abi.StoragePower,
	circulatingFil abi.TokenAmount, nwVer network.Version,
) (min, max abi.TokenAmount) {
	switch actors.VersionForNetwork(nwVer) {
	    {{range .versions}}
            case actors.Version{{.}}:
                {{if (eq . 0)}}
                    return market{{.}}.DealProviderCollateralBounds(size, verified, rawBytePower, qaPower, baselinePower, circulatingFil, nwVer)
                {{else}}
                    return market{{.}}.DealProviderCollateralBounds(size, verified, rawBytePower, qaPower, baselinePower, circulatingFil)
                {{end}}
        {{end}}
	default:
		panic("unsupported actors version")
	}
}

func DealDurationBounds(pieceSize abi.PaddedPieceSize) (min, max abi.ChainEpoch) {
	return market{{.latestVersion}}.DealDurationBounds(pieceSize)
}

// Sets the challenge window and scales the proving period to match (such that
// there are always 48 challenge windows in a proving period).
func SetWPoStChallengeWindow(period abi.ChainEpoch) {
    {{range .versions}}
        miner{{.}}.WPoStChallengeWindow = period
        miner{{.}}.WPoStProvingPeriod = period * abi.ChainEpoch(miner{{.}}.WPoStPeriodDeadlines)
        {{if (ge . 3)}}
        	// by default, this is 2x finality which is 30 periods.
        	// scale it if we're scaling the challenge period.
        	miner{{.}}.WPoStDisputeWindow = period * 30
        {{end}}
    {{end}}
}

func GetWinningPoStSectorSetLookback(nwVer network.Version) abi.ChainEpoch {
	if nwVer <= network.Version3 {
		return 10
	}

	return ChainFinality
}

func GetMaxSectorExpirationExtension() abi.ChainEpoch {
	return miner{{.latestVersion}}.MaxSectorExpirationExtension
}

// TODO: we'll probably need to abstract over this better in the future.
func GetMaxPoStPartitions(p abi.RegisteredPoStProof) (int, error) {
	sectorsPerPart, err := builtin{{.latestVersion}}.PoStProofWindowPoStPartitionSectors(p)
	if err != nil {
		return 0, err
	}
	return int(miner{{.latestVersion}}.AddressedSectorsMax / sectorsPerPart), nil
}

func GetDefaultSectorSize() abi.SectorSize {
	// supported sector sizes are the same across versions.
	szs := make([]abi.SectorSize, 0, len(miner{{.latestVersion}}.PreCommitSealProofTypesV8))
	for spt := range miner{{.latestVersion}}.PreCommitSealProofTypesV8 {
		ss, err := spt.SectorSize()
		if err != nil {
			panic(err)
		}

		szs = append(szs, ss)
	}

	sort.Slice(szs, func(i, j int) bool {
		return szs[i] < szs[j]
	})

	return szs[0]
}

func GetSectorMaxLifetime(proof abi.RegisteredSealProof, nwVer network.Version) abi.ChainEpoch {
	if nwVer <= network.Version10 {
		return builtin{{.latestVersion}}.SealProofPoliciesV0[proof].SectorMaxLifetime
	}

	return builtin{{.latestVersion}}.SealProofPoliciesV11[proof].SectorMaxLifetime
}

func GetAddressedSectorsMax(nwVer network.Version) int {
	switch actors.VersionForNetwork(nwVer) {
	    {{range .versions}}
            case actors.Version{{.}}:
                return miner{{.}}.AddressedSectorsMax
        {{end}}
	default:
		panic("unsupported network version")
	}
}

func GetDeclarationsMax(nwVer network.Version) int {
	switch actors.VersionForNetwork(nwVer) {
	    {{range .versions}}
	    case actors.Version{{.}}:
            {{if (eq . 0)}}
                // TODO: Should we instead panic here since the concept doesn't exist yet?
                return miner{{.}}.AddressedPartitionsMax
            {{else}}
                return miner{{.}}.DeclarationsMax
            {{end}}
        {{end}}
	default:
		panic("unsupported network version")
	}
}