package shard_test

import (
	"context"
	"path/filepath"
	"testing"
	"time"

	objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
	objectCore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/blobovniczatree"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/fstree"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/testutil"
	meta "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/metabase"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger"
	cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
	"github.com/panjf2000/ants/v2"
	"github.com/stretchr/testify/require"
	"go.uber.org/zap"
)

func Test_GCDropsLockedExpiredObject(t *testing.T) {
	var sh *shard.Shard

	epoch := &epochState{
		Value: 100,
	}

	rootPath := t.TempDir()
	opts := []shard.Option{
		shard.WithID(shard.NewIDFromBytes([]byte{})),
		shard.WithLogger(&logger.Logger{Logger: zap.NewNop()}),
		shard.WithBlobStorOptions(
			blobstor.WithStorages([]blobstor.SubStorage{
				{
					Storage: blobovniczatree.NewBlobovniczaTree(
						blobovniczatree.WithRootPath(filepath.Join(rootPath, "blob", "blobovnicza")),
						blobovniczatree.WithBlobovniczaShallowDepth(2),
						blobovniczatree.WithBlobovniczaShallowWidth(2)),
					Policy: func(_ *objectSDK.Object, data []byte) bool {
						return len(data) <= 1<<20
					},
				},
				{
					Storage: fstree.New(
						fstree.WithPath(filepath.Join(rootPath, "blob"))),
				},
			}),
		),
		shard.WithMetaBaseOptions(
			meta.WithPath(filepath.Join(rootPath, "meta")),
			meta.WithEpochState(epoch),
		),
		shard.WithDeletedLockCallback(func(_ context.Context, addresses []oid.Address) {
			sh.HandleDeletedLocks(addresses)
		}),
		shard.WithExpiredLocksCallback(func(ctx context.Context, epoch uint64, a []oid.Address) {
			sh.HandleExpiredLocks(ctx, epoch, a)
		}),
		shard.WithGCWorkerPoolInitializer(func(sz int) util.WorkerPool {
			pool, err := ants.NewPool(sz)
			require.NoError(t, err)

			return pool
		}),
	}

	sh = shard.New(opts...)
	require.NoError(t, sh.Open())
	require.NoError(t, sh.Init(context.Background()))

	t.Cleanup(func() {
		releaseShard(sh, t)
	})

	cnr := cidtest.ID()

	var objExpirationAttr objectSDK.Attribute
	objExpirationAttr.SetKey(objectV2.SysAttributeExpEpoch)
	objExpirationAttr.SetValue("101")

	obj := testutil.GenerateObjectWithCID(cnr)
	obj.SetAttributes(objExpirationAttr)
	objID, _ := obj.ID()

	var lockExpirationAttr objectSDK.Attribute
	lockExpirationAttr.SetKey(objectV2.SysAttributeExpEpoch)
	lockExpirationAttr.SetValue("103")

	lock := testutil.GenerateObjectWithCID(cnr)
	lock.SetType(objectSDK.TypeLock)
	lock.SetAttributes(lockExpirationAttr)
	lockID, _ := lock.ID()

	var putPrm shard.PutPrm
	putPrm.SetObject(obj)

	_, err := sh.Put(putPrm)
	require.NoError(t, err)

	err = sh.Lock(cnr, lockID, []oid.ID{objID})
	require.NoError(t, err)

	putPrm.SetObject(lock)
	_, err = sh.Put(putPrm)
	require.NoError(t, err)

	epoch.Value = 105
	sh.NotificationChannel() <- shard.EventNewEpoch(epoch.Value)

	var getPrm shard.GetPrm
	getPrm.SetAddress(objectCore.AddressOf(obj))
	require.Eventually(t, func() bool {
		_, err = sh.Get(context.Background(), getPrm)
		return shard.IsErrNotFound(err)
	}, 3*time.Second, 1*time.Second, "expired object must be deleted")
}