package api

import (
	"bytes"
	"context"
	"time"

	datatransfer "github.com/filecoin-project/go-data-transfer"
	"github.com/ipfs/go-cid"
	"github.com/libp2p/go-libp2p-core/peer"

	"github.com/filecoin-project/go-address"
	"github.com/filecoin-project/go-fil-markets/piecestore"
	"github.com/filecoin-project/go-fil-markets/retrievalmarket"
	"github.com/filecoin-project/go-fil-markets/storagemarket"
	"github.com/filecoin-project/go-state-types/abi"
	"github.com/filecoin-project/lotus/chain/types"
	"github.com/filecoin-project/lotus/extern/sector-storage/fsutil"
	"github.com/filecoin-project/lotus/extern/sector-storage/stores"
	"github.com/filecoin-project/lotus/extern/sector-storage/storiface"
)

// StorageMiner is a low-level interface to the Filecoin network storage miner node
type StorageMiner interface {
	Common

	ActorAddress(context.Context) (address.Address, error)

	ActorSectorSize(context.Context, address.Address) (abi.SectorSize, error)

	MiningBase(context.Context) (*types.TipSet, error)

	// Temp api for testing
	PledgeSector(context.Context) error

	// Get the status of a given sector by ID
	SectorsStatus(ctx context.Context, sid abi.SectorNumber, showOnChainInfo bool) (SectorInfo, error)

	// List all staged sectors
	SectorsList(context.Context) ([]abi.SectorNumber, error)

	SectorsRefs(context.Context) (map[string][]SealedRef, error)

	// SectorStartSealing can be called on sectors in Empty or WaitDeals states
	// to trigger sealing early
	SectorStartSealing(context.Context, abi.SectorNumber) error
	// SectorSetSealDelay sets the time that a newly-created sector
	// waits for more deals before it starts sealing
	SectorSetSealDelay(context.Context, time.Duration) error
	// SectorGetSealDelay gets the time that a newly-created sector
	// waits for more deals before it starts sealing
	SectorGetSealDelay(context.Context) (time.Duration, error)
	// SectorSetExpectedSealDuration sets the expected time for a sector to seal
	SectorSetExpectedSealDuration(context.Context, time.Duration) error
	// SectorGetExpectedSealDuration gets the expected time for a sector to seal
	SectorGetExpectedSealDuration(context.Context) (time.Duration, error)
	SectorsUpdate(context.Context, abi.SectorNumber, SectorState) error
	SectorRemove(context.Context, abi.SectorNumber) error
	SectorMarkForUpgrade(ctx context.Context, id abi.SectorNumber) error

	StorageList(ctx context.Context) (map[stores.ID][]stores.Decl, error)
	StorageLocal(ctx context.Context) (map[stores.ID]string, error)
	StorageStat(ctx context.Context, id stores.ID) (fsutil.FsStat, error)

	// WorkerConnect tells the node to connect to workers RPC
	WorkerConnect(context.Context, string) error
	WorkerStats(context.Context) (map[uint64]storiface.WorkerStats, error)
	WorkerJobs(context.Context) (map[uint64][]storiface.WorkerJob, error)

	// SealingSchedDiag dumps internal sealing scheduler state
	SealingSchedDiag(context.Context) (interface{}, error)

	stores.SectorIndex

	MarketImportDealData(ctx context.Context, propcid cid.Cid, path string) error
	MarketListDeals(ctx context.Context) ([]MarketDeal, error)
	MarketListRetrievalDeals(ctx context.Context) ([]retrievalmarket.ProviderDealState, error)
	MarketGetDealUpdates(ctx context.Context) (<-chan storagemarket.MinerDeal, error)
	MarketListIncompleteDeals(ctx context.Context) ([]storagemarket.MinerDeal, error)
	MarketSetAsk(ctx context.Context, price types.BigInt, verifiedPrice types.BigInt, duration abi.ChainEpoch, minPieceSize abi.PaddedPieceSize, maxPieceSize abi.PaddedPieceSize) error
	MarketGetAsk(ctx context.Context) (*storagemarket.SignedStorageAsk, error)
	MarketSetRetrievalAsk(ctx context.Context, rask *retrievalmarket.Ask) error
	MarketGetRetrievalAsk(ctx context.Context) (*retrievalmarket.Ask, error)
	MarketListDataTransfers(ctx context.Context) ([]DataTransferChannel, error)
	MarketDataTransferUpdates(ctx context.Context) (<-chan DataTransferChannel, error)
	// MinerRestartDataTransfer attempts to restart a data transfer with the given transfer ID and other peer
	MarketRestartDataTransfer(ctx context.Context, transferID datatransfer.TransferID, otherPeer peer.ID, isInitiator bool) error
	// ClientCancelDataTransfer cancels a data transfer with the given transfer ID and other peer
	MarketCancelDataTransfer(ctx context.Context, transferID datatransfer.TransferID, otherPeer peer.ID, isInitiator bool) error

	DealsImportData(ctx context.Context, dealPropCid cid.Cid, file string) error
	DealsList(ctx context.Context) ([]MarketDeal, error)
	DealsConsiderOnlineStorageDeals(context.Context) (bool, error)
	DealsSetConsiderOnlineStorageDeals(context.Context, bool) error
	DealsConsiderOnlineRetrievalDeals(context.Context) (bool, error)
	DealsSetConsiderOnlineRetrievalDeals(context.Context, bool) error
	DealsPieceCidBlocklist(context.Context) ([]cid.Cid, error)
	DealsSetPieceCidBlocklist(context.Context, []cid.Cid) error
	DealsConsiderOfflineStorageDeals(context.Context) (bool, error)
	DealsSetConsiderOfflineStorageDeals(context.Context, bool) error
	DealsConsiderOfflineRetrievalDeals(context.Context) (bool, error)
	DealsSetConsiderOfflineRetrievalDeals(context.Context, bool) error

	StorageAddLocal(ctx context.Context, path string) error

	PiecesListPieces(ctx context.Context) ([]cid.Cid, error)
	PiecesListCidInfos(ctx context.Context) ([]cid.Cid, error)
	PiecesGetPieceInfo(ctx context.Context, pieceCid cid.Cid) (*piecestore.PieceInfo, error)
	PiecesGetCIDInfo(ctx context.Context, payloadCid cid.Cid) (*piecestore.CIDInfo, error)

	// CreateBackup creates node backup onder the specified file name. The
	// method requires that the lotus-miner is running with the
	// LOTUS_BACKUP_BASE_PATH environment variable set to some path, and that
	// the path specified when calling CreateBackup is within the base path
	CreateBackup(ctx context.Context, fpath string) error
}

type SealRes struct {
	Err   string
	GoErr error `json:"-"`

	Proof []byte
}

type SectorLog struct {
	Kind      string
	Timestamp uint64

	Trace string

	Message string
}

type SectorInfo struct {
	SectorID     abi.SectorNumber
	State        SectorState
	CommD        *cid.Cid
	CommR        *cid.Cid
	Proof        []byte
	Deals        []abi.DealID
	Ticket       SealTicket
	Seed         SealSeed
	PreCommitMsg *cid.Cid
	CommitMsg    *cid.Cid
	Retries      uint64
	ToUpgrade    bool

	LastErr string

	Log []SectorLog

	// On Chain Info
	SealProof          abi.RegisteredSealProof // The seal proof type implies the PoSt proof/s
	Activation         abi.ChainEpoch          // Epoch during which the sector proof was accepted
	Expiration         abi.ChainEpoch          // Epoch during which the sector expires
	DealWeight         abi.DealWeight          // Integral of active deals over sector lifetime
	VerifiedDealWeight abi.DealWeight          // Integral of active verified deals over sector lifetime
	InitialPledge      abi.TokenAmount         // Pledge collected to commit this sector
	// Expiration Info
	OnTime abi.ChainEpoch
	// non-zero if sector is faulty, epoch at which it will be permanently
	// removed if it doesn't recover
	Early abi.ChainEpoch
}

type SealedRef struct {
	SectorID abi.SectorNumber
	Offset   abi.PaddedPieceSize
	Size     abi.UnpaddedPieceSize
}

type SealedRefs struct {
	Refs []SealedRef
}

type SealTicket struct {
	Value abi.SealRandomness
	Epoch abi.ChainEpoch
}

type SealSeed struct {
	Value abi.InteractiveSealRandomness
	Epoch abi.ChainEpoch
}

func (st *SealTicket) Equals(ost *SealTicket) bool {
	return bytes.Equal(st.Value, ost.Value) && st.Epoch == ost.Epoch
}

func (st *SealSeed) Equals(ost *SealSeed) bool {
	return bytes.Equal(st.Value, ost.Value) && st.Epoch == ost.Epoch
}

type SectorState string