package shard

import (
	"context"
	"crypto/rand"
	"testing"

	"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/writecache"
	cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
	"github.com/stretchr/testify/require"
	"golang.org/x/sync/errgroup"
)

func TestWriteCacheObjectLoss(t *testing.T) {
	t.Parallel()

	const (
		smallSize = 1024
		objCount  = 100
	)

	objects := make([]*objectSDK.Object, objCount)
	for i := range objects {
		size := smallSize
		// if i%2 == 0 {
		size = smallSize / 2
		// }
		data := make([]byte, size)
		rand.Read(data)

		objects[i] = testutil.GenerateObjectWithCIDWithPayload(cidtest.ID(), data)
	}

	dir := t.TempDir()
	wcOpts := []writecache.Option{
		writecache.WithMaxObjectSize(smallSize * 2),
	}

	sh := newCustomShard(t, true, shardOptions{rootPath: dir, wcOpts: wcOpts})

	var errG errgroup.Group
	for i := range objects {
		obj := objects[i]
		errG.Go(func() error {
			var putPrm PutPrm
			putPrm.SetObject(obj)
			_, err := sh.Put(context.Background(), putPrm)
			return err
		})
	}
	require.NoError(t, errG.Wait())
	require.NoError(t, sh.Close(context.Background()))

	sh = newCustomShard(t, true, shardOptions{rootPath: dir, wcOpts: wcOpts})
	defer func() { require.NoError(t, sh.Close(context.Background())) }()

	var getPrm GetPrm

	for i := range objects {
		getPrm.SetAddress(object.AddressOf(objects[i]))

		_, err := sh.Get(context.Background(), getPrm)
		require.NoError(t, err, i)
	}
}