//go:build integration

package meta

import (
	"context"
	"fmt"
	"io"
	"os"
	"strconv"
	"testing"
	"time"

	objectV2 "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/object"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/testutil"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/util/logger/test"
	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
	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/stretchr/testify/require"
	"golang.org/x/sync/errgroup"
)

const upgradeFilePath = "/path/to/metabase.v2"

func TestUpgradeV2ToV3(t *testing.T) {
	path := createTempCopy(t, upgradeFilePath)
	defer func() {
		require.NoError(t, os.Remove(path))
	}()
	db := New(WithPath(path), WithEpochState(epochState{e: 1000}), WithLogger(test.NewLogger(t)))
	require.NoError(t, db.Open(context.Background(), mode.ReadWrite))
	require.ErrorIs(t, db.Init(), ErrOutdatedVersion)
	require.NoError(t, db.Close())
	require.NoError(t, Upgrade(context.Background(), path, true, t.Log))
	require.NoError(t, db.Open(context.Background(), mode.ReadWrite))
	require.NoError(t, db.Init())
	require.NoError(t, db.Close())
	fmt.Println()
}

func createTempCopy(t *testing.T, path string) string {
	src, err := os.Open(path)
	require.NoError(t, err)

	tmpPath := upgradeFilePath + time.Now().Format(time.RFC3339)
	dest, err := os.Create(tmpPath)
	require.NoError(t, err)

	_, err = io.Copy(dest, src)
	require.NoError(t, err)

	require.NoError(t, src.Close())
	require.NoError(t, dest.Close())

	return tmpPath
}

func TestGenerateMetabaseFile(t *testing.T) {
	t.Skip("for generating db")
	const (
		containersCount         = 10_000
		simpleObjectsCount      = 500_000
		complexObjectsCount     = 500_000 // x2
		deletedByGCMarksCount   = 100_000
		deletedByTombstoneCount = 100_000 // x2
		lockedCount             = 100_000 // x2

		allocSize            = 128 << 20
		generateWorkersCount = 1_000
		minEpoch             = 1_000
		maxFilename          = 1_000
		maxStorageID         = 10_000
	)

	db := New(WithPath(upgradeFilePath), WithEpochState(epochState{e: minEpoch}), WithLogger(test.NewLogger(t)))
	require.NoError(t, db.Open(context.Background(), mode.ReadWrite))
	db.boltDB.AllocSize = allocSize
	db.boltDB.NoSync = true
	require.NoError(t, db.Init())
	containers := make([]cid.ID, containersCount)
	for i := range containers {
		containers[i] = cidtest.ID()
	}
	oc, err := db.ObjectCounters()
	require.NoError(t, err)
	require.True(t, oc.IsZero())
	eg, ctx := errgroup.WithContext(context.Background())
	eg.SetLimit(generateWorkersCount)
	// simple objects
	for i := range simpleObjectsCount {
		i := i
		eg.Go(func() error {
			obj := testutil.GenerateObjectWithCID(containers[i%len(containers)])
			testutil.AddAttribute(obj, "FileName", strconv.FormatInt(int64(i%maxFilename), 10))
			testutil.AddAttribute(obj, objectV2.SysAttributeExpEpoch, strconv.FormatUint(uint64(i%minEpoch+minEpoch), 10))
			_, err := db.Put(ctx, PutPrm{
				obj: obj,
				id:  []byte(strconv.FormatInt(int64(i%maxStorageID), 10) + "/" + strconv.FormatInt(int64(i%maxStorageID), 10)),
			})
			require.NoError(t, err)
			return nil
		})
	}
	require.NoError(t, eg.Wait())
	db.log.Info("simple objects generated")
	eg, ctx = errgroup.WithContext(context.Background())
	eg.SetLimit(generateWorkersCount)
	// complex objects
	for i := range complexObjectsCount {
		i := i
		eg.Go(func() error {
			parent := testutil.GenerateObjectWithCID(containers[i%len(containers)])
			child := testutil.GenerateObjectWithCID(containers[i%len(containers)])
			child.SetParent(parent)
			idParent, _ := parent.ID()
			child.SetParentID(idParent)
			testutil.AddAttribute(child, "FileName", strconv.FormatInt(int64(i%maxFilename), 10))
			testutil.AddAttribute(parent, "FileName", strconv.FormatInt(int64(i%maxFilename), 10))
			testutil.AddAttribute(child, objectV2.SysAttributeExpEpoch, strconv.FormatUint(uint64(i%minEpoch+minEpoch), 10))
			testutil.AddAttribute(parent, objectV2.SysAttributeExpEpoch, strconv.FormatUint(uint64(i%minEpoch+minEpoch), 10))
			_, err := db.Put(ctx, PutPrm{
				obj: child,
			})
			require.NoError(t, err)
			return nil
		})
	}
	require.NoError(t, eg.Wait())
	db.log.Info("complex objects generated")
	eg, ctx = errgroup.WithContext(context.Background())
	eg.SetLimit(generateWorkersCount)
	// simple objects deleted by gc marks
	for i := range deletedByGCMarksCount {
		i := i
		eg.Go(func() error {
			obj := testutil.GenerateObjectWithCID(containers[i%len(containers)])
			testutil.AddAttribute(obj, "FileName", strconv.FormatInt(int64(i%maxFilename), 10))
			_, err := db.Put(ctx, PutPrm{
				obj: obj,
				id:  []byte(strconv.FormatInt(int64(i%maxStorageID), 10) + "/" + strconv.FormatInt(int64(i%maxStorageID), 10)),
			})
			require.NoError(t, err)
			_, err = db.Inhume(ctx, InhumePrm{
				target: []oid.Address{object.AddressOf(obj)},
			})
			require.NoError(t, err)
			return nil
		})
	}
	require.NoError(t, eg.Wait())
	db.log.Info("simple objects deleted by gc marks generated")
	eg, ctx = errgroup.WithContext(context.Background())
	eg.SetLimit(10000)
	// simple objects deleted by tombstones
	for i := range deletedByTombstoneCount {
		i := i
		eg.Go(func() error {
			obj := testutil.GenerateObjectWithCID(containers[i%len(containers)])
			testutil.AddAttribute(obj, "FileName", strconv.FormatInt(int64(i%maxFilename), 10))
			_, err := db.Put(ctx, PutPrm{
				obj: obj,
				id:  []byte(strconv.FormatInt(int64(i%maxStorageID), 10) + "/" + strconv.FormatInt(int64(i%maxStorageID), 10)),
			})
			tomb := testutil.GenerateObjectWithCID(containers[i%len(containers)])
			tomb.SetType(objectSDK.TypeTombstone)
			_, err = db.Put(ctx, PutPrm{
				obj: tomb,
				id:  []byte(strconv.FormatInt(int64(i%maxStorageID), 10) + "/" + strconv.FormatInt(int64(i%maxStorageID), 10)),
			})
			require.NoError(t, err)
			tombAddr := object.AddressOf(tomb)
			_, err = db.Inhume(ctx, InhumePrm{
				target: []oid.Address{object.AddressOf(obj)},
				tomb:   &tombAddr,
			})
			require.NoError(t, err)
			return nil
		})
	}
	require.NoError(t, eg.Wait())
	db.log.Info("simple objects deleted by tombstones generated")
	eg, ctx = errgroup.WithContext(context.Background())
	eg.SetLimit(generateWorkersCount)
	// simple objects locked by locks
	for i := range lockedCount {
		i := i
		eg.Go(func() error {
			obj := testutil.GenerateObjectWithCID(containers[i%len(containers)])
			testutil.AddAttribute(obj, "FileName", strconv.FormatInt(int64(i%maxFilename), 10))
			_, err := db.Put(ctx, PutPrm{
				obj: obj,
				id:  []byte(strconv.FormatInt(int64(i%maxStorageID), 10) + "/" + strconv.FormatInt(int64(i%maxStorageID), 10)),
			})
			lock := testutil.GenerateObjectWithCID(containers[i%len(containers)])
			lock.SetType(objectSDK.TypeLock)
			testutil.AddAttribute(lock, objectV2.SysAttributeExpEpoch, strconv.FormatUint(uint64(i%minEpoch+minEpoch), 10))
			_, err = db.Put(ctx, PutPrm{
				obj: lock,
				id:  []byte(strconv.FormatInt(int64(i%maxStorageID), 10) + "/" + strconv.FormatInt(int64(i%maxStorageID), 10)),
			})
			require.NoError(t, err)
			err = db.Lock(ctx, containers[i%len(containers)], object.AddressOf(lock).Object(), []oid.ID{object.AddressOf(obj).Object()})
			require.NoError(t, err)
			return nil
		})
	}
	require.NoError(t, eg.Wait())
	db.log.Info("simple objects locked by locks generated")
	require.NoError(t, db.boltDB.Sync())
	require.NoError(t, db.Close())
}