package meta

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

	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/internal/testutil"
	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/shard/mode"
	"github.com/stretchr/testify/require"
	"go.etcd.io/bbolt"
)

type epochState struct{ e uint64 }

func (s epochState) CurrentEpoch() uint64 {
	return s.e
}

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

	db := New(
		[]Option{
			WithPath(filepath.Join(t.TempDir(), "metabase")),
			WithPermissions(0o600),
			WithEpochState(epochState{}),
		}...,
	)

	require.NoError(t, db.Open(context.Background(), mode.ReadWrite))
	require.NoError(t, db.Init())

	defer func() { require.NoError(t, db.Close()) }()

	for idx := 0; idx < 100; idx++ {
		var putPrm PutPrm
		putPrm.SetObject(testutil.GenerateObject())
		putPrm.SetStorageID([]byte(fmt.Sprintf("0/%d", idx)))
		_, err := db.Put(context.Background(), putPrm)
		require.NoError(t, err)
	}

	require.NoError(t, db.Reset())

	var bucketCount int
	require.NoError(t, db.database.Update(func(tx *bbolt.Tx) error {
		return tx.ForEach(func(name []byte, b *bbolt.Bucket) error {
			_, exists := mStaticBuckets[string(name)]
			require.True(t, exists, "unexpected bucket:"+string(name))
			bucketCount++
			return nil
		})
	}))
	require.Equal(t, len(mStaticBuckets), bucketCount)
}