package rootcoord

import (
	"context"
	"testing"

	"github.com/golang/protobuf/proto"
	"github.com/stretchr/testify/assert"

	"github.com/milvus-io/milvus/internal/util/typeutil"

	"github.com/milvus-io/milvus/internal/proto/commonpb"
	"github.com/milvus-io/milvus/internal/proto/internalpb"
	"github.com/milvus-io/milvus/internal/proto/milvuspb"
	"github.com/milvus-io/milvus/internal/proto/schemapb"
	"github.com/milvus-io/milvus/internal/util/dependency"
)

//func TestDescribeSegmentReqTask_Type(t *testing.T) {
//	tsk := &DescribeSegmentsReqTask{
//		Req: &rootcoordpb.DescribeSegmentsRequest{
//			Base: &commonpb.MsgBase{
//				MsgType: commonpb.MsgType_DescribeSegments,
//			},
//		},
//	}
//	assert.Equal(t, commonpb.MsgType_DescribeSegments, tsk.Type())
//}

//func TestDescribeSegmentsReqTask_Execute(t *testing.T) {
//	collID := typeutil.UniqueID(1)
//	partID := typeutil.UniqueID(2)
//	segID := typeutil.UniqueID(100)
//	fieldID := typeutil.UniqueID(3)
//	buildID := typeutil.UniqueID(4)
//	indexID := typeutil.UniqueID(1000)
//	indexName := "test_describe_segments_index"
//
//	c := &Core{}
//
//	// failed to get flushed segments.
//	c.CallGetFlushedSegmentsService = func(ctx context.Context, collID, partID typeutil.UniqueID) ([]typeutil.UniqueID, error) {
//		return nil, errors.New("mock")
//	}
//	tsk := &DescribeSegmentsReqTask{
//		baseReqTask: baseReqTask{
//			core: c,
//		},
//		Req: &rootcoordpb.DescribeSegmentsRequest{
//			Base: &commonpb.MsgBase{
//				MsgType: commonpb.MsgType_DescribeSegments,
//			},
//			CollectionID: collID,
//			SegmentIDs:   []typeutil.UniqueID{segID},
//		},
//		Rsp: &rootcoordpb.DescribeSegmentsResponse{},
//	}
//	assert.Error(t, tsk.Execute(context.Background()))
//
//	// requested segment not found in flushed segments.
//	c.CallGetFlushedSegmentsService = func(ctx context.Context, collID, partID typeutil.UniqueID) ([]typeutil.UniqueID, error) {
//		return []typeutil.UniqueID{}, nil
//	}
//	assert.Error(t, tsk.Execute(context.Background()))
//
//	// segment not found in meta.
//	c.CallGetFlushedSegmentsService = func(ctx context.Context, collID, partID typeutil.UniqueID) ([]typeutil.UniqueID, error) {
//		return []typeutil.UniqueID{segID}, nil
//	}
//	c.MetaTable = &MetaTable{
//		segID2IndexID: make(map[typeutil.UniqueID]typeutil.UniqueID, 1),
//	}
//	assert.NoError(t, tsk.Execute(context.Background()))
//
//	// index not found in meta
//	c.MetaTable = &MetaTable{
//		segID2IndexID: map[typeutil.UniqueID]typeutil.UniqueID{segID: indexID},
//		indexID2Meta: map[typeutil.UniqueID]*model.Index{
//			indexID: {
//				CollectionID: collID,
//				FieldID:      fieldID,
//				IndexID:      indexID,
//				SegmentIndexes: map[int64]model.SegmentIndex{
//					segID + 1: {
//						Segment: model.Segment{
//							SegmentID:   segID,
//							PartitionID: partID,
//						},
//						BuildID:     buildID,
//						EnableIndex: true,
//					},
//				},
//			},
//		},
//	}
//	assert.Error(t, tsk.Execute(context.Background()))
//
//	// success.
//	c.MetaTable = &MetaTable{
//		segID2IndexID: map[typeutil.UniqueID]typeutil.UniqueID{segID: indexID},
//		indexID2Meta: map[typeutil.UniqueID]*model.Index{
//			indexID: {
//				CollectionID: collID,
//				FieldID:      fieldID,
//				IndexID:      indexID,
//				IndexName:    indexName,
//				IndexParams:  nil,
//				SegmentIndexes: map[int64]model.SegmentIndex{
//					segID: {
//						Segment: model.Segment{
//							SegmentID:   segID,
//							PartitionID: partID,
//						},
//						BuildID:     buildID,
//						EnableIndex: true,
//					},
//				},
//			},
//		},
//	}
//	assert.NoError(t, tsk.Execute(context.Background()))
//}

func Test_hasSystemFields(t *testing.T) {
	t.Run("no system fields", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{Fields: []*schemapb.FieldSchema{{Name: "not_system_field"}}}
		assert.False(t, hasSystemFields(schema, []string{RowIDFieldName, TimeStampFieldName}))
	})

	t.Run("has row id field", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{Fields: []*schemapb.FieldSchema{{Name: RowIDFieldName}}}
		assert.True(t, hasSystemFields(schema, []string{RowIDFieldName, TimeStampFieldName}))
	})

	t.Run("has timestamp field", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{Fields: []*schemapb.FieldSchema{{Name: TimeStampFieldName}}}
		assert.True(t, hasSystemFields(schema, []string{RowIDFieldName, TimeStampFieldName}))
	})
}

func TestCreateCollectionReqTask_Execute_hasSystemFields(t *testing.T) {
	schema := &schemapb.CollectionSchema{Name: "test", Fields: []*schemapb.FieldSchema{{Name: TimeStampFieldName}}}
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)
	task := &CreateCollectionReqTask{
		Req: &milvuspb.CreateCollectionRequest{
			Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_CreateCollection},
			CollectionName: "test",
			Schema:         marshaledSchema,
		},
	}
	err = task.Execute(context.Background())
	assert.Error(t, err)
}

func TestCreateCollectionReqTask_ChannelMismatch(t *testing.T) {
	schema := &schemapb.CollectionSchema{Name: "test", Fields: []*schemapb.FieldSchema{{Name: "f1"}}}
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)
	msFactory := dependency.NewDefaultFactory(true)

	Params.Init()
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()
	core, err := NewCore(ctx, msFactory)
	assert.NoError(t, err)
	core.IDAllocator = func(count uint32) (typeutil.UniqueID, typeutil.UniqueID, error) {
		return 0, 0, nil
	}
	core.chanTimeTick = newTimeTickSync(core.ctx, 1, core.factory, nil)
	core.TSOAllocator = func(count uint32) (typeutil.Timestamp, error) {
		return 0, nil
	}
	core.SendDdCreateCollectionReq = func(context.Context, *internalpb.CreateCollectionRequest, []string) (map[string][]byte, error) {
		return map[string][]byte{}, nil
	}

	// set RootCoordDml="" to trigger a error for code coverage
	Params.CommonCfg.RootCoordDml = ""
	task := &CreateCollectionReqTask{
		baseReqTask: baseReqTask{
			core: core,
		},
		Req: &milvuspb.CreateCollectionRequest{
			Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_CreateCollection},
			CollectionName: "test",
			Schema:         marshaledSchema,
		},
	}
	err = task.Execute(context.Background())
	assert.Error(t, err)
}