// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 grpcindexnodeclient

import (
	"context"
	"math/rand"
	"os"
	"strings"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
	"go.uber.org/zap"

	"github.com/milvus-io/milvus/internal/mocks"
	"github.com/milvus-io/milvus/pkg/v2/log"
	"github.com/milvus-io/milvus/pkg/v2/proto/internalpb"
	"github.com/milvus-io/milvus/pkg/v2/proto/workerpb"
	"github.com/milvus-io/milvus/pkg/v2/util/etcd"
	"github.com/milvus-io/milvus/pkg/v2/util/metricsinfo"
	"github.com/milvus-io/milvus/pkg/v2/util/paramtable"
)

func TestMain(m *testing.M) {
	// init embed etcd
	embedetcdServer, tempDir, err := etcd.StartTestEmbedEtcdServer()
	if err != nil {
		log.Fatal("failed to start embed etcd server", zap.Error(err))
	}
	defer os.RemoveAll(tempDir)
	defer embedetcdServer.Close()

	addrs := etcd.GetEmbedEtcdEndpoints(embedetcdServer)

	paramtable.Init()
	paramtable.Get().Save(Params.EtcdCfg.Endpoints.Key, strings.Join(addrs, ","))

	rand.Seed(time.Now().UnixNano())
	os.Exit(m.Run())
}

func Test_NewClient(t *testing.T) {
	ctx := context.Background()
	client, err := NewClient(ctx, "", 1, false)
	assert.Nil(t, client)
	assert.Error(t, err)

	client, err = NewClient(ctx, "localhost:1234", 1, false)
	assert.NotNil(t, client)
	assert.NoError(t, err)

	err = client.Close()
	assert.NoError(t, err)
}

func TestIndexNodeClient(t *testing.T) {
	ctx := context.Background()
	client, err := NewClient(ctx, "localhost:1234", 1, false)
	assert.NoError(t, err)
	assert.NotNil(t, client)

	mockIN := mocks.NewMockIndexNodeClient(t)

	mockGrpcClient := mocks.NewMockGrpcClient[workerpb.IndexNodeClient](t)
	mockGrpcClient.EXPECT().Close().Return(nil)
	mockGrpcClient.EXPECT().ReCall(mock.Anything, mock.Anything).RunAndReturn(func(ctx context.Context, f func(nodeClient workerpb.IndexNodeClient) (interface{}, error)) (interface{}, error) {
		return f(mockIN)
	})
	client.(*Client).grpcClient = mockGrpcClient

	t.Run("GetComponentStates", func(t *testing.T) {
		mockIN.EXPECT().GetComponentStates(mock.Anything, mock.Anything).Return(nil, nil)
		_, err := client.GetComponentStates(ctx, nil)
		assert.NoError(t, err)
	})

	t.Run("GetStatisticsChannel", func(t *testing.T) {
		mockIN.EXPECT().GetStatisticsChannel(mock.Anything, mock.Anything).Return(nil, nil)
		_, err := client.GetStatisticsChannel(ctx, nil)
		assert.NoError(t, err)
	})

	t.Run("CreatJob", func(t *testing.T) {
		mockIN.EXPECT().CreateJob(mock.Anything, mock.Anything).Return(nil, nil)

		req := &workerpb.CreateJobRequest{
			ClusterID: "0",
			BuildID:   0,
		}
		_, err := client.CreateJob(ctx, req)
		assert.NoError(t, err)
	})

	t.Run("QueryJob", func(t *testing.T) {
		mockIN.EXPECT().QueryJobs(mock.Anything, mock.Anything).Return(nil, nil)

		req := &workerpb.QueryJobsRequest{}
		_, err := client.QueryJobs(ctx, req)
		assert.NoError(t, err)
	})

	t.Run("DropJob", func(t *testing.T) {
		mockIN.EXPECT().DropJobs(mock.Anything, mock.Anything).Return(nil, nil)

		req := &workerpb.DropJobsRequest{}
		_, err := client.DropJobs(ctx, req)
		assert.NoError(t, err)
	})

	t.Run("ShowConfigurations", func(t *testing.T) {
		mockIN.EXPECT().ShowConfigurations(mock.Anything, mock.Anything).Return(nil, nil)

		req := &internalpb.ShowConfigurationsRequest{
			Pattern: "",
		}
		_, err := client.ShowConfigurations(ctx, req)
		assert.NoError(t, err)
	})

	t.Run("GetMetrics", func(t *testing.T) {
		mockIN.EXPECT().GetMetrics(mock.Anything, mock.Anything).Return(nil, nil)

		req, err := metricsinfo.ConstructRequestByMetricType(metricsinfo.SystemInfoMetrics)
		assert.NoError(t, err)
		_, err = client.GetMetrics(ctx, req)
		assert.NoError(t, err)
	})

	t.Run("GetJobStats", func(t *testing.T) {
		mockIN.EXPECT().GetJobStats(mock.Anything, mock.Anything).Return(nil, nil)

		req := &workerpb.GetJobStatsRequest{}
		_, err := client.GetJobStats(ctx, req)
		assert.NoError(t, err)
	})

	t.Run("CreateJobV2", func(t *testing.T) {
		mockIN.EXPECT().CreateJobV2(mock.Anything, mock.Anything).Return(nil, nil)

		req := &workerpb.CreateJobV2Request{}
		_, err := client.CreateJobV2(ctx, req)
		assert.NoError(t, err)
	})

	t.Run("QueryJobsV2", func(t *testing.T) {
		mockIN.EXPECT().QueryJobsV2(mock.Anything, mock.Anything).Return(nil, nil)

		req := &workerpb.QueryJobsV2Request{}
		_, err := client.QueryJobsV2(ctx, req)
		assert.NoError(t, err)
	})

	t.Run("DropJobsV2", func(t *testing.T) {
		mockIN.EXPECT().DropJobsV2(mock.Anything, mock.Anything).Return(nil, nil)

		req := &workerpb.DropJobsV2Request{}
		_, err := client.DropJobsV2(ctx, req)
		assert.NoError(t, err)
	})

	err = client.Close()
	assert.NoError(t, err)
}