package market

import (
	"bytes"

	"github.com/filecoin-project/go-address"
	"github.com/filecoin-project/go-state-types/abi"
	"github.com/ipfs/go-cid"
	cbg "github.com/whyrusleeping/cbor-gen"
	"golang.org/x/xerrors"

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

	market{{.v}} "github.com/filecoin-project/specs-actors{{.import}}actors/builtin/market"
	adt{{.v}} "github.com/filecoin-project/specs-actors{{.import}}actors/util/adt"
)

var _ State = (*state{{.v}})(nil)

func load{{.v}}(store adt.Store, root cid.Cid) (State, error) {
	out := state{{.v}}{store: store}
	err := store.Get(store.Context(), root, &out)
	if err != nil {
		return nil, err
	}
	return &out, nil
}

func make{{.v}}(store adt.Store) (State, error) {
	out := state{{.v}}{store: store}
	{{if (le .v 2)}}
		ea, err := adt{{.v}}.MakeEmptyArray(store).Root()
		if err != nil {
			return nil, err
		}

		em, err := adt{{.v}}.MakeEmptyMap(store).Root()
		if err != nil {
			return nil, err
		}

		out.State = *market{{.v}}.ConstructState(ea, em, em)
	{{else}}
		s, err := market{{.v}}.ConstructState(store)
		if err != nil {
			return nil, err
		}

		out.State = *s
	{{end}}
	return &out, nil
}

type state{{.v}} struct {
	market{{.v}}.State
	store adt.Store
}

func (s *state{{.v}}) TotalLocked() (abi.TokenAmount, error) {
	fml := types.BigAdd(s.TotalClientLockedCollateral, s.TotalProviderLockedCollateral)
	fml = types.BigAdd(fml, s.TotalClientStorageFee)
	return fml, nil
}

func (s *state{{.v}}) BalancesChanged(otherState State) (bool, error) {
	otherState{{.v}}, ok := otherState.(*state{{.v}})
	if !ok {
		// there's no way to compare different versions of the state, so let's
		// just say that means the state of balances has changed
		return true, nil
	}
	return !s.State.EscrowTable.Equals(otherState{{.v}}.State.EscrowTable) || !s.State.LockedTable.Equals(otherState{{.v}}.State.LockedTable), nil
}

func (s *state{{.v}}) StatesChanged(otherState State) (bool, error) {
	otherState{{.v}}, ok := otherState.(*state{{.v}})
	if !ok {
		// there's no way to compare different versions of the state, so let's
		// just say that means the state of balances has changed
		return true, nil
	}
	return !s.State.States.Equals(otherState{{.v}}.State.States), nil
}

func (s *state{{.v}}) States() (DealStates, error) {
	stateArray, err := adt{{.v}}.AsArray(s.store, s.State.States{{if (ge .v 3)}}, market{{.v}}.StatesAmtBitwidth{{end}})
	if err != nil {
		return nil, err
	}
	return &dealStates{{.v}}{stateArray}, nil
}

func (s *state{{.v}}) ProposalsChanged(otherState State) (bool, error) {
	otherState{{.v}}, ok := otherState.(*state{{.v}})
	if !ok {
		// there's no way to compare different versions of the state, so let's
		// just say that means the state of balances has changed
		return true, nil
	}
	return !s.State.Proposals.Equals(otherState{{.v}}.State.Proposals), nil
}

func (s *state{{.v}}) Proposals() (DealProposals, error) {
	proposalArray, err := adt{{.v}}.AsArray(s.store, s.State.Proposals{{if (ge .v 3)}}, market{{.v}}.ProposalsAmtBitwidth{{end}})
	if err != nil {
		return nil, err
	}
	return &dealProposals{{.v}}{proposalArray}, nil
}

func (s *state{{.v}}) EscrowTable() (BalanceTable, error) {
	bt, err := adt{{.v}}.AsBalanceTable(s.store, s.State.EscrowTable)
	if err != nil {
		return nil, err
	}
	return &balanceTable{{.v}}{bt}, nil
}

func (s *state{{.v}}) LockedTable() (BalanceTable, error) {
	bt, err := adt{{.v}}.AsBalanceTable(s.store, s.State.LockedTable)
	if err != nil {
		return nil, err
	}
	return &balanceTable{{.v}}{bt}, nil
}

func (s *state{{.v}}) VerifyDealsForActivation(
	minerAddr address.Address, deals []abi.DealID, currEpoch, sectorExpiry abi.ChainEpoch,
) (weight, verifiedWeight abi.DealWeight, err error) {
	w, vw{{if (ge .v 2)}}, _{{end}}, err := market{{.v}}.ValidateDealsForActivation(&s.State, s.store, deals, minerAddr, sectorExpiry, currEpoch)
	return w, vw, err
}

func (s *state{{.v}}) NextID() (abi.DealID, error) {
	return s.State.NextID, nil
}

type balanceTable{{.v}} struct {
	*adt{{.v}}.BalanceTable
}

func (bt *balanceTable{{.v}}) ForEach(cb func(address.Address, abi.TokenAmount) error) error {
	asMap := (*adt{{.v}}.Map)(bt.BalanceTable)
	var ta abi.TokenAmount
	return asMap.ForEach(&ta, func(key string) error {
		a, err := address.NewFromBytes([]byte(key))
		if err != nil {
			return err
		}
		return cb(a, ta)
	})
}

type dealStates{{.v}} struct {
	adt.Array
}

func (s *dealStates{{.v}}) Get(dealID abi.DealID) (*DealState, bool, error) {
	var deal{{.v}} market{{.v}}.DealState
	found, err := s.Array.Get(uint64(dealID), &deal{{.v}})
	if err != nil {
		return nil, false, err
	}
	if !found {
		return nil, false, nil
	}
	deal := fromV{{.v}}DealState(deal{{.v}})
	return &deal, true, nil
}

func (s *dealStates{{.v}}) ForEach(cb func(dealID abi.DealID, ds DealState) error) error {
	var ds{{.v}} market{{.v}}.DealState
	return s.Array.ForEach(&ds{{.v}}, func(idx int64) error {
		return cb(abi.DealID(idx), fromV{{.v}}DealState(ds{{.v}}))
	})
}

func (s *dealStates{{.v}}) decode(val *cbg.Deferred) (*DealState, error) {
	var ds{{.v}} market{{.v}}.DealState
	if err := ds{{.v}}.UnmarshalCBOR(bytes.NewReader(val.Raw)); err != nil {
		return nil, err
	}
	ds := fromV{{.v}}DealState(ds{{.v}})
	return &ds, nil
}

func (s *dealStates{{.v}}) array() adt.Array {
	return s.Array
}

func fromV{{.v}}DealState(v{{.v}} market{{.v}}.DealState) DealState {
        return (DealState)(v{{.v}})
}

type dealProposals{{.v}} struct {
	adt.Array
}

func (s *dealProposals{{.v}}) Get(dealID abi.DealID) (*DealProposal, bool, error) {
	var proposal{{.v}} market{{.v}}.DealProposal
	found, err := s.Array.Get(uint64(dealID), &proposal{{.v}})
	if err != nil {
		return nil, false, err
	}
	if !found {
		return nil, false, nil
	}

    proposal, err := fromV{{.v}}DealProposal(proposal{{.v}})
    if err != nil {
        return nil, true, xerrors.Errorf("decoding proposal: %w", err)
    }

    return &proposal, true, nil
}

func (s *dealProposals{{.v}}) ForEach(cb func(dealID abi.DealID, dp DealProposal) error) error {
	var dp{{.v}} market{{.v}}.DealProposal
	return s.Array.ForEach(&dp{{.v}}, func(idx int64) error {
        dp, err := fromV{{.v}}DealProposal(dp{{.v}})
        if err != nil {
            return xerrors.Errorf("decoding proposal: %w", err)
        }

        return cb(abi.DealID(idx), dp)
	})
}

func (s *dealProposals{{.v}}) decode(val *cbg.Deferred) (*DealProposal, error) {
	var dp{{.v}} market{{.v}}.DealProposal
	if err := dp{{.v}}.UnmarshalCBOR(bytes.NewReader(val.Raw)); err != nil {
		return nil, err
	}

    dp, err := fromV{{.v}}DealProposal(dp{{.v}})
    if err != nil {
        return nil, err
    }

    return &dp, nil
}

func (s *dealProposals{{.v}}) array() adt.Array {
	return s.Array
}

func fromV{{.v}}DealProposal(v{{.v}} market{{.v}}.DealProposal) (DealProposal, error) {
    {{if (le .v 7)}}
        label, err := labelFromGoString(v{{.v}}.Label)
        if err != nil {
            return DealProposal{}, xerrors.Errorf("error setting deal label: %w", err)
        }
    {{else}}
        label := v{{.v}}.Label
    {{end}}

    return DealProposal{
        PieceCID: v{{.v}}.PieceCID,
        PieceSize: v{{.v}}.PieceSize,
        VerifiedDeal: v{{.v}}.VerifiedDeal,
        Client: v{{.v}}.Client,
        Provider: v{{.v}}.Provider,

        Label: label,

        StartEpoch: v{{.v}}.StartEpoch,
        EndEpoch: v{{.v}}.EndEpoch,
        StoragePricePerEpoch: v{{.v}}.StoragePricePerEpoch,

        ProviderCollateral: v{{.v}}.ProviderCollateral,
        ClientCollateral: v{{.v}}.ClientCollateral,
    }, nil
}


func (s *state{{.v}}) GetState() interface{} {
	return &s.State
}

var _ PublishStorageDealsReturn = (*publishStorageDealsReturn{{.v}})(nil)

func decodePublishStorageDealsReturn{{.v}}(b []byte) (PublishStorageDealsReturn, error) {
	var retval market{{.v}}.PublishStorageDealsReturn
	if err := retval.UnmarshalCBOR(bytes.NewReader(b)); err != nil {
		return nil, xerrors.Errorf("failed to unmarshal PublishStorageDealsReturn: %w", err)
	}

	return &publishStorageDealsReturn{{.v}}{retval}, nil
}

type publishStorageDealsReturn{{.v}} struct {
	market{{.v}}.PublishStorageDealsReturn
}

func (r *publishStorageDealsReturn{{.v}}) IsDealValid(index uint64) (bool, error) {
	{{if (ge .v 6)}}
	    return r.ValidDeals.IsSet(index)
	{{else}}
	    // PublishStorageDeals only succeeded if all deals were valid in this version of actors
	    return true, nil
	{{end}}
}

func (r *publishStorageDealsReturn{{.v}}) DealIDs() ([]abi.DealID, error) {
    return r.IDs, nil
}