package reader

import (
	"context"
	"encoding/binary"
	"math"
	"testing"
	"time"

	"github.com/golang/protobuf/proto"
	"github.com/stretchr/testify/assert"
	"github.com/zilliztech/milvus-distributed/internal/proto/etcdpb"
	"github.com/zilliztech/milvus-distributed/internal/proto/schemapb"

	"github.com/zilliztech/milvus-distributed/internal/msgstream"
	"github.com/zilliztech/milvus-distributed/internal/proto/commonpb"
	internalPb "github.com/zilliztech/milvus-distributed/internal/proto/internalpb"
)

const ctxTimeInMillisecond = 2000
const closeWithDeadline = true

// NOTE: start pulsar before test
func TestManipulationService_Start(t *testing.T) {
	var ctx context.Context

	if closeWithDeadline {
		var cancel context.CancelFunc
		d := time.Now().Add(ctxTimeInMillisecond * time.Millisecond)
		ctx, cancel = context.WithDeadline(context.Background(), d)
		defer cancel()
	} else {
		ctx = context.Background()
	}

	// init query node
	pulsarURL := "pulsar://localhost:6650"
	node := NewQueryNode(ctx, 0, pulsarURL)

	// init meta
	fieldVec := schemapb.FieldSchema{
		Name:     "vec",
		DataType: schemapb.DataType_VECTOR_FLOAT,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "16",
			},
		},
	}

	fieldInt := schemapb.FieldSchema{
		Name:     "age",
		DataType: schemapb.DataType_INT32,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "1",
			},
		},
	}

	schema := schemapb.CollectionSchema{
		Name: "collection0",
		Fields: []*schemapb.FieldSchema{
			&fieldVec, &fieldInt,
		},
	}

	collectionMeta := etcdpb.CollectionMeta{
		ID:            UniqueID(0),
		Schema:        &schema,
		CreateTime:    Timestamp(0),
		SegmentIds:    []UniqueID{0},
		PartitionTags: []string{"default"},
	}

	collectionMetaBlob := proto.MarshalTextString(&collectionMeta)
	assert.NotEqual(t, "", collectionMetaBlob)

	var collection = node.container.addCollection(&collectionMeta, collectionMetaBlob)
	assert.Equal(t, collection.meta.Schema.Name, "collection0")
	assert.Equal(t, collection.meta.ID, UniqueID(0))
	assert.Equal(t, len(node.container.collections), 1)

	partition, err := node.container.addPartition(collection, collectionMeta.PartitionTags[0])
	assert.NoError(t, err)

	segmentID := UniqueID(0)
	targetSeg, err := node.container.addSegment(collection, partition, segmentID)
	assert.NoError(t, err)
	assert.Equal(t, targetSeg.segmentID, segmentID)

	// test data generate
	const msgLength = 10
	const DIM = 16
	const N = 10

	var vec = [DIM]float32{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
	var rawData []byte
	for _, ele := range vec {
		buf := make([]byte, 4)
		binary.LittleEndian.PutUint32(buf, math.Float32bits(ele))
		rawData = append(rawData, buf...)
	}
	bs := make([]byte, 4)
	binary.LittleEndian.PutUint32(bs, 1)
	rawData = append(rawData, bs...)
	var records []*commonpb.Blob
	for i := 0; i < N; i++ {
		blob := &commonpb.Blob{
			Value: rawData,
		}
		records = append(records, blob)
	}

	timeRange := TimeRange{
		timestampMin: 0,
		timestampMax: math.MaxUint64,
	}

	// messages generate
	insertMessages := make([]*msgstream.TsMsg, 0)
	for i := 0; i < msgLength; i++ {
		var msg msgstream.TsMsg = &msgstream.InsertMsg{
			BaseMsg: msgstream.BaseMsg{
				HashValues: []int32{
					int32(i), int32(i),
				},
			},
			InsertRequest: internalPb.InsertRequest{
				MsgType:        internalPb.MsgType_kInsert,
				ReqId:          int64(0),
				CollectionName: "collection0",
				PartitionTag:   "default",
				SegmentId:      int64(0),
				ChannelId:      int64(0),
				ProxyId:        int64(0),
				Timestamps:     []uint64{uint64(i + 1000), uint64(i + 1000)},
				RowIds:         []int64{int64(i), int64(i)},
				RowData: []*commonpb.Blob{
					{Value: rawData},
					{Value: rawData},
				},
			},
		}
		insertMessages = append(insertMessages, &msg)
	}

	msgPack := msgstream.MsgPack{
		BeginTs: timeRange.timestampMin,
		EndTs:   timeRange.timestampMax,
		Msgs:    insertMessages,
	}

	// pulsar produce
	const receiveBufSize = 1024
	producerChannels := []string{"insert"}

	insertStream := msgstream.NewPulsarMsgStream(ctx, receiveBufSize)
	insertStream.SetPulsarCient(pulsarURL)
	insertStream.CreatePulsarProducers(producerChannels)

	var insertMsgStream msgstream.MsgStream = insertStream
	insertMsgStream.Start()
	err = insertMsgStream.Produce(&msgPack)
	assert.NoError(t, err)

	// dataSync
	node.dataSyncService = newDataSyncService(node.ctx, node, node.pulsarURL)
	go node.dataSyncService.start()

	node.Close()

	<-ctx.Done()
}