package policy

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

	miner0 "github.com/filecoin-project/specs-actors/actors/builtin/miner"
	power0 "github.com/filecoin-project/specs-actors/actors/builtin/power"
	verifreg0 "github.com/filecoin-project/specs-actors/actors/builtin/verifreg"
	builtin2 "github.com/filecoin-project/specs-actors/v2/actors/builtin"
	miner2 "github.com/filecoin-project/specs-actors/v2/actors/builtin/miner"
	verifreg2 "github.com/filecoin-project/specs-actors/v2/actors/builtin/verifreg"
)

const (
	ChainFinality          = miner0.ChainFinality
	SealRandomnessLookback = ChainFinality
)

// SetSupportedProofTypes sets supported proof types, across all actor versions.
// This should only be used for testing.
func SetSupportedProofTypes(types ...abi.RegisteredSealProof) {
	newTypes := make(map[abi.RegisteredSealProof]struct{}, len(types))
	for _, t := range types {
		newTypes[t] = struct{}{}
	}
	// Set for all miner versions.
	miner0.SupportedProofTypes = newTypes
	miner2.SupportedProofTypes = newTypes
}

// 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 {
		// Set for all miner versions.
		miner0.SupportedProofTypes[t] = struct{}{}
		miner2.SupportedProofTypes[t] = struct{}{}
	}
}

// SetPreCommitChallengeDelay sets the pre-commit challenge delay across all
// actors versions. Use for testing.
func SetPreCommitChallengeDelay(delay abi.ChainEpoch) {
	// Set for all miner versions.
	miner0.PreCommitChallengeDelay = delay
	miner2.PreCommitChallengeDelay = delay
}

// TODO: this function shouldn't really exist. Instead, the API should expose the precommit delay.
func GetPreCommitChallengeDelay() abi.ChainEpoch {
	return miner0.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) {
	power0.ConsensusMinerMinPower = p
	for _, policy := range builtin2.SealProofPolicies {
		policy.ConsensusMinerMinPower = p
	}
}

// SetMinVerifiedDealSize sets the minimum size of a verified deal. This should
// only be used for testing.
func SetMinVerifiedDealSize(size abi.StoragePower) {
	verifreg0.MinVerifiedDealSize = size
	verifreg2.MinVerifiedDealSize = size
}

func GetMaxProveCommitDuration(ver actors.Version, t abi.RegisteredSealProof) abi.ChainEpoch {
	switch ver {
	case actors.Version0:
		return miner0.MaxSealDuration[t]
	case actors.Version2:
		return miner2.MaxProveCommitDuration[t]
	default:
		panic("unsupported actors version")
	}
}