package object

import (
	"crypto/rand"
	"crypto/sha256"
	"testing"

	"github.com/nspcc-dev/neofs-api-go/v2/object"
	"github.com/nspcc-dev/neofs-sdk-go/checksum"
	cidtest "github.com/nspcc-dev/neofs-sdk-go/container/id/test"
	oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
	ownertest "github.com/nspcc-dev/neofs-sdk-go/owner/test"
	sessiontest "github.com/nspcc-dev/neofs-sdk-go/session/test"
	"github.com/nspcc-dev/neofs-sdk-go/signature"
	"github.com/nspcc-dev/neofs-sdk-go/version"
	"github.com/stretchr/testify/require"
)

func randID(t *testing.T) *oid.ID {
	id := oid.NewID()
	id.SetSHA256(randSHA256Checksum(t))

	return id
}

func randSHA256Checksum(t *testing.T) (cs [sha256.Size]byte) {
	_, err := rand.Read(cs[:])
	require.NoError(t, err)

	return
}

func randTZChecksum(t *testing.T) (cs [64]byte) {
	_, err := rand.Read(cs[:])
	require.NoError(t, err)

	return
}

func TestRawObject_SetID(t *testing.T) {
	obj := NewRaw()

	id := randID(t)

	obj.SetID(id)

	require.Equal(t, id, obj.ID())
}

func TestRawObject_SetSignature(t *testing.T) {
	obj := NewRaw()

	sig := signature.New()
	sig.SetKey([]byte{1, 2, 3})
	sig.SetSign([]byte{4, 5, 6})

	obj.SetSignature(sig)

	require.Equal(t, sig, obj.Signature())
}

func TestRawObject_SetPayload(t *testing.T) {
	obj := NewRaw()

	payload := make([]byte, 10)
	_, _ = rand.Read(payload)

	obj.SetPayload(payload)

	require.Equal(t, payload, obj.Payload())
}

func TestRawObject_SetVersion(t *testing.T) {
	obj := NewRaw()

	ver := version.New()
	ver.SetMajor(1)
	ver.SetMinor(2)

	obj.SetVersion(ver)

	require.Equal(t, ver, obj.Version())
}

func TestRawObject_SetPayloadSize(t *testing.T) {
	obj := NewRaw()

	sz := uint64(133)
	obj.SetPayloadSize(sz)

	require.Equal(t, sz, obj.PayloadSize())
}

func TestRawObject_SetContainerID(t *testing.T) {
	obj := NewRaw()

	cid := cidtest.ID()

	obj.SetContainerID(cid)

	require.Equal(t, cid, obj.ContainerID())
}

func TestRawObject_SetOwnerID(t *testing.T) {
	obj := NewRaw()

	ownerID := ownertest.ID()

	obj.SetOwnerID(ownerID)

	require.Equal(t, ownerID, obj.OwnerID())
}

func TestRawObject_SetCreationEpoch(t *testing.T) {
	obj := NewRaw()

	creat := uint64(228)
	obj.setCreationEpoch(creat)

	require.Equal(t, creat, obj.CreationEpoch())
}

func TestRawObject_SetPayloadChecksum(t *testing.T) {
	obj := NewRaw()
	cs := checksum.New()
	cs.SetSHA256(randSHA256Checksum(t))

	obj.SetPayloadChecksum(cs)

	require.Equal(t, cs, obj.PayloadChecksum())
}

func TestRawObject_SetPayloadHomomorphicHash(t *testing.T) {
	obj := NewRaw()

	cs := checksum.New()
	cs.SetTillichZemor(randTZChecksum(t))

	obj.SetPayloadHomomorphicHash(cs)

	require.Equal(t, cs, obj.PayloadHomomorphicHash())
}

func TestRawObject_SetAttributes(t *testing.T) {
	obj := NewRaw()

	a1 := NewAttribute()
	a1.SetKey("key1")
	a1.SetValue("val1")

	a2 := NewAttribute()
	a2.SetKey("key2")
	a2.SetValue("val2")

	obj.SetAttributes(a1, a2)

	require.Equal(t, []*Attribute{a1, a2}, obj.Attributes())
}

func TestRawObject_SetPreviousID(t *testing.T) {
	obj := NewRaw()

	prev := randID(t)

	obj.SetPreviousID(prev)

	require.Equal(t, prev, obj.PreviousID())
}

func TestRawObject_SetChildren(t *testing.T) {
	obj := NewRaw()

	id1 := randID(t)
	id2 := randID(t)

	obj.SetChildren(id1, id2)

	require.Equal(t, []*oid.ID{id1, id2}, obj.Children())
}

func TestRawObject_SetSplitID(t *testing.T) {
	obj := NewRaw()

	require.Nil(t, obj.SplitID())

	splitID := NewSplitID()
	obj.SetSplitID(splitID)

	require.Equal(t, obj.SplitID(), splitID)
}

func TestRawObject_SetParent(t *testing.T) {
	obj := NewRaw()

	require.Nil(t, obj.Parent())

	par := NewRaw()
	par.SetID(randID(t))
	par.SetContainerID(cidtest.ID())
	par.SetSignature(signature.New())

	parObj := par.Object()

	obj.SetParent(parObj)

	require.Equal(t, parObj, obj.Parent())
}

func TestRawObject_ToV2(t *testing.T) {
	objV2 := new(object.Object)
	objV2.SetPayload([]byte{1, 2, 3})

	obj := NewRawFromV2(objV2)

	require.Equal(t, objV2, obj.ToV2())
}

func TestRawObject_SetSessionToken(t *testing.T) {
	obj := NewRaw()

	tok := sessiontest.Token()

	obj.SetSessionToken(tok)

	require.Equal(t, tok, obj.SessionToken())
}

func TestRawObject_SetType(t *testing.T) {
	obj := NewRaw()

	typ := TypeStorageGroup

	obj.SetType(typ)

	require.Equal(t, typ, obj.Type())
}

func TestRawObject_CutPayload(t *testing.T) {
	o1 := NewRaw()

	p1 := []byte{12, 3}
	o1.SetPayload(p1)

	sz := uint64(13)
	o1.SetPayloadSize(sz)

	o2 := o1.CutPayload()

	require.Equal(t, sz, o2.PayloadSize())
	require.Empty(t, o2.Payload())

	sz++
	o1.SetPayloadSize(sz)

	require.Equal(t, sz, o1.PayloadSize())
	require.Equal(t, sz, o2.PayloadSize())

	p2 := []byte{4, 5, 6}
	o2.SetPayload(p2)

	require.Equal(t, p2, o2.Payload())
	require.Equal(t, p1, o1.Payload())
}

func TestRawObject_SetParentID(t *testing.T) {
	obj := NewRaw()

	id := randID(t)
	obj.setParentID(id)

	require.Equal(t, id, obj.ParentID())
}

func TestRawObject_ResetRelations(t *testing.T) {
	obj := NewRaw()

	obj.SetPreviousID(randID(t))

	obj.ResetRelations()

	require.Nil(t, obj.PreviousID())
}

func TestRwObject_HasParent(t *testing.T) {
	obj := NewRaw()

	obj.InitRelations()

	require.True(t, obj.HasParent())

	obj.ResetRelations()

	require.False(t, obj.HasParent())
}

func TestRWObjectEncoding(t *testing.T) {
	o := NewRaw()
	o.SetID(randID(t))

	t.Run("binary", func(t *testing.T) {
		data, err := o.Marshal()
		require.NoError(t, err)

		o2 := NewRaw()
		require.NoError(t, o2.Unmarshal(data))

		require.Equal(t, o, o2)
	})

	t.Run("json", func(t *testing.T) {
		data, err := o.MarshalJSON()
		require.NoError(t, err)

		o2 := NewRaw()
		require.NoError(t, o2.UnmarshalJSON(data))

		require.Equal(t, o, o2)
	})
}