// Copyright (C) 2019-2020 Zilliz. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License
// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
// or implied. See the License for the specific language governing permissions and limitations under the License.

package querynode

import (
	"context"

	"github.com/milvus-io/milvus/internal/proto/commonpb"
	"github.com/milvus-io/milvus/internal/proto/datapb"
	"github.com/milvus-io/milvus/internal/proto/indexpb"
	"github.com/milvus-io/milvus/internal/proto/internalpb"
	"github.com/milvus-io/milvus/internal/proto/milvuspb"
	"github.com/milvus-io/milvus/internal/proto/proxypb"
	"github.com/milvus-io/milvus/internal/proto/rootcoordpb"
	"github.com/milvus-io/milvus/internal/types"
)

// TODO: move to mock_test
// TODO: getMockFrom common package
type mockRootCoord struct {
	state       internalpb.StateCode
	returnError bool // TODO: add error tests
}

func (m *mockRootCoord) CreateAlias(ctx context.Context, req *milvuspb.CreateAliasRequest) (*commonpb.Status, error) {
	panic("implement me")
}

func (m *mockRootCoord) DropAlias(ctx context.Context, req *milvuspb.DropAliasRequest) (*commonpb.Status, error) {
	panic("implement me")
}

func (m *mockRootCoord) AlterAlias(ctx context.Context, req *milvuspb.AlterAliasRequest) (*commonpb.Status, error) {
	panic("implement me")
}

func newMockRootCoord() *mockRootCoord {
	return &mockRootCoord{
		state: internalpb.StateCode_Healthy,
	}
}

func (m *mockRootCoord) GetTimeTickChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
	return nil, nil
}

func (m *mockRootCoord) Init() error {
	return nil
}

func (m *mockRootCoord) Start() error {
	return nil
}

func (m *mockRootCoord) Stop() error {
	m.state = internalpb.StateCode_Abnormal
	return nil
}

func (m *mockRootCoord) Register() error {
	return nil
}

func (m *mockRootCoord) GetComponentStates(ctx context.Context) (*internalpb.ComponentStates, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) GetStatisticsChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) CreateCollection(ctx context.Context, req *milvuspb.CreateCollectionRequest) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) DropCollection(ctx context.Context, req *milvuspb.DropCollectionRequest) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) HasCollection(ctx context.Context, req *milvuspb.HasCollectionRequest) (*milvuspb.BoolResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) DescribeCollection(ctx context.Context, req *milvuspb.DescribeCollectionRequest) (*milvuspb.DescribeCollectionResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) ShowCollections(ctx context.Context, req *milvuspb.ShowCollectionsRequest) (*milvuspb.ShowCollectionsResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) CreatePartition(ctx context.Context, req *milvuspb.CreatePartitionRequest) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) DropPartition(ctx context.Context, req *milvuspb.DropPartitionRequest) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) HasPartition(ctx context.Context, req *milvuspb.HasPartitionRequest) (*milvuspb.BoolResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) ShowPartitions(ctx context.Context, req *milvuspb.ShowPartitionsRequest) (*milvuspb.ShowPartitionsResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) CreateIndex(ctx context.Context, req *milvuspb.CreateIndexRequest) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) DescribeIndex(ctx context.Context, req *milvuspb.DescribeIndexRequest) (*milvuspb.DescribeIndexResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) DropIndex(ctx context.Context, req *milvuspb.DropIndexRequest) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) AllocTimestamp(ctx context.Context, req *rootcoordpb.AllocTimestampRequest) (*rootcoordpb.AllocTimestampResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) AllocID(ctx context.Context, req *rootcoordpb.AllocIDRequest) (*rootcoordpb.AllocIDResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) DescribeSegment(ctx context.Context, req *milvuspb.DescribeSegmentRequest) (*milvuspb.DescribeSegmentResponse, error) {
	return &milvuspb.DescribeSegmentResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_Success,
		},
		IndexID:     indexID,
		BuildID:     buildID,
		EnableIndex: true,
	}, nil
}

func (m *mockRootCoord) ShowSegments(ctx context.Context, req *milvuspb.ShowSegmentsRequest) (*milvuspb.ShowSegmentsResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) GetDdChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) UpdateChannelTimeTick(ctx context.Context, req *internalpb.ChannelTimeTickMsg) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) ReleaseDQLMessageStream(ctx context.Context, req *proxypb.ReleaseDQLMessageStreamRequest) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}
func (m *mockRootCoord) SegmentFlushCompleted(ctx context.Context, in *datapb.SegmentFlushCompletedMsg) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}
func (m *mockRootCoord) AddNewSegment(ctx context.Context, in *datapb.SegmentMsg) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockRootCoord) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error) {
	panic("not implemented") // TODO: Implement
}

////////////////////////////////////////////////////////////////////////////////////////////
// TODO: move to mock_test
// TODO: getMockFrom common package
type mockIndexCoord struct {
	types.Component
	types.TimeTickProvider

	idxFileInfo *indexpb.IndexFilePathInfo
}

func newMockIndexCoord() *mockIndexCoord {
	paths, _ := generateIndex(defaultSegmentID)
	return &mockIndexCoord{
		idxFileInfo: &indexpb.IndexFilePathInfo{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_Success,
			},
			IndexBuildID:   buildID,
			IndexFilePaths: paths,
		},
	}

}

func (m *mockIndexCoord) BuildIndex(ctx context.Context, req *indexpb.BuildIndexRequest) (*indexpb.BuildIndexResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockIndexCoord) DropIndex(ctx context.Context, req *indexpb.DropIndexRequest) (*commonpb.Status, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockIndexCoord) GetIndexStates(ctx context.Context, req *indexpb.GetIndexStatesRequest) (*indexpb.GetIndexStatesResponse, error) {
	panic("not implemented") // TODO: Implement
}

func (m *mockIndexCoord) GetIndexFilePaths(ctx context.Context, req *indexpb.GetIndexFilePathsRequest) (*indexpb.GetIndexFilePathsResponse, error) {
	return &indexpb.GetIndexFilePathsResponse{
		Status: &commonpb.Status{
			ErrorCode: commonpb.ErrorCode_Success,
		},
		FilePaths: []*indexpb.IndexFilePathInfo{m.idxFileInfo},
	}, nil
}

func (m *mockIndexCoord) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error) {
	panic("not implemented") // TODO: Implement
}