package sectorstorage

import (
	"context"
	"io"
	"sync"

	"github.com/google/uuid"
	"github.com/ipfs/go-cid"

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

	"github.com/filecoin-project/lotus/extern/sector-storage/mock"
	"github.com/filecoin-project/lotus/extern/sector-storage/sealtasks"
	"github.com/filecoin-project/lotus/extern/sector-storage/stores"
	"github.com/filecoin-project/lotus/extern/sector-storage/storiface"
)

type testWorker struct {
	acceptTasks map[sealtasks.TaskType]struct{}
	lstor       *stores.Local
	ret         storiface.WorkerReturn

	mockSeal *mock.SectorMgr

	pc1s    int
	pc1lk   sync.Mutex
	pc1wait *sync.WaitGroup
}

func newTestWorker(wcfg WorkerConfig, lstor *stores.Local, ret storiface.WorkerReturn) *testWorker {
	ssize, err := wcfg.SealProof.SectorSize()
	if err != nil {
		panic(err)
	}

	acceptTasks := map[sealtasks.TaskType]struct{}{}
	for _, taskType := range wcfg.TaskTypes {
		acceptTasks[taskType] = struct{}{}
	}

	return &testWorker{
		acceptTasks: acceptTasks,
		lstor:       lstor,
		ret:         ret,

		mockSeal: mock.NewMockSectorMgr(ssize, nil),
	}
}

func (t *testWorker) asyncCall(sector abi.SectorID, work func(ci storiface.CallID)) (storiface.CallID, error) {
	ci := storiface.CallID{
		Sector: sector,
		ID:     uuid.New(),
	}

	go work(ci)

	return ci, nil
}

func (t *testWorker) NewSector(ctx context.Context, sector abi.SectorID) error {
	panic("implement me")
}

func (t *testWorker) UnsealPiece(ctx context.Context, id abi.SectorID, index storiface.UnpaddedByteIndex, size abi.UnpaddedPieceSize, randomness abi.SealRandomness, cid cid.Cid) (storiface.CallID, error) {
	panic("implement me")
}

func (t *testWorker) ReadPiece(ctx context.Context, writer io.Writer, id abi.SectorID, index storiface.UnpaddedByteIndex, size abi.UnpaddedPieceSize) (storiface.CallID, error) {
	panic("implement me")
}

func (t *testWorker) AddPiece(ctx context.Context, sector abi.SectorID, pieceSizes []abi.UnpaddedPieceSize, newPieceSize abi.UnpaddedPieceSize, pieceData storage.Data) (storiface.CallID, error) {
	return t.asyncCall(sector, func(ci storiface.CallID) {
		p, err := t.mockSeal.AddPiece(ctx, sector, pieceSizes, newPieceSize, pieceData)
		if err := t.ret.ReturnAddPiece(ctx, ci, p, errstr(err)); err != nil {
			log.Error(err)
		}
	})
}

func (t *testWorker) SealPreCommit1(ctx context.Context, sector abi.SectorID, ticket abi.SealRandomness, pieces []abi.PieceInfo) (storiface.CallID, error) {
	return t.asyncCall(sector, func(ci storiface.CallID) {
		t.pc1s++

		if t.pc1wait != nil {
			t.pc1wait.Done()
		}

		t.pc1lk.Lock()
		defer t.pc1lk.Unlock()

		p1o, err := t.mockSeal.SealPreCommit1(ctx, sector, ticket, pieces)
		if err := t.ret.ReturnSealPreCommit1(ctx, ci, p1o, errstr(err)); err != nil {
			log.Error(err)
		}
	})
}

func (t *testWorker) SealPreCommit2(ctx context.Context, sector abi.SectorID, pc1o storage.PreCommit1Out) (storiface.CallID, error) {
	panic("implement me")
}

func (t *testWorker) SealCommit1(ctx context.Context, sector abi.SectorID, ticket abi.SealRandomness, seed abi.InteractiveSealRandomness, pieces []abi.PieceInfo, cids storage.SectorCids) (storiface.CallID, error) {
	panic("implement me")
}

func (t *testWorker) SealCommit2(ctx context.Context, sector abi.SectorID, c1o storage.Commit1Out) (storiface.CallID, error) {
	panic("implement me")
}

func (t *testWorker) FinalizeSector(ctx context.Context, sector abi.SectorID, keepUnsealed []storage.Range) (storiface.CallID, error) {
	panic("implement me")
}

func (t *testWorker) ReleaseUnsealed(ctx context.Context, sector abi.SectorID, safeToFree []storage.Range) (storiface.CallID, error) {
	panic("implement me")
}

func (t *testWorker) Remove(ctx context.Context, sector abi.SectorID) (storiface.CallID, error) {
	panic("implement me")
}

func (t *testWorker) MoveStorage(ctx context.Context, sector abi.SectorID, types storiface.SectorFileType) (storiface.CallID, error) {
	panic("implement me")
}

func (t *testWorker) Fetch(ctx context.Context, sector abi.SectorID, fileType storiface.SectorFileType, ptype storiface.PathType, am storiface.AcquireMode) (storiface.CallID, error) {
	return t.asyncCall(sector, func(ci storiface.CallID) {
		if err := t.ret.ReturnFetch(ctx, ci, ""); err != nil {
			log.Error(err)
		}
	})
}

func (t *testWorker) TaskTypes(ctx context.Context) (map[sealtasks.TaskType]struct{}, error) {
	return t.acceptTasks, nil
}

func (t *testWorker) Paths(ctx context.Context) ([]stores.StoragePath, error) {
	return t.lstor.Local(ctx)
}

func (t *testWorker) Info(ctx context.Context) (storiface.WorkerInfo, error) {
	res := ResourceTable[sealtasks.TTPreCommit2][abi.RegisteredSealProof_StackedDrg2KiBV1]

	return storiface.WorkerInfo{
		Hostname: "testworkerer",
		Resources: storiface.WorkerResources{
			MemPhysical: res.MinMemory * 3,
			MemSwap:     0,
			MemReserved: res.MinMemory,
			CPUs:        32,
			GPUs:        nil,
		},
	}, nil
}

func (t *testWorker) Closing(ctx context.Context) (<-chan struct{}, error) {
	return ctx.Done(), nil
}

func (t *testWorker) Close() error {
	panic("implement me")
}

var _ Worker = &testWorker{}