// 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 indexcoord

import (
	"context"
	"testing"

	"github.com/milvus-io/milvus/internal/proto/commonpb"
	"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/util/etcd"
	"github.com/stretchr/testify/assert"
)

func TestIndexCoordMock(t *testing.T) {
	Params.Init()
	icm := Mock{}

	etcdCli, err := etcd.GetEtcdClient(&Params.BaseParams)
	assert.Nil(t, err)
	icm.SetEtcdClient(etcdCli)
	defer etcdCli.Close()
	err = icm.Register()
	assert.Nil(t, err)
	err = icm.Init()
	assert.Nil(t, err)
	err = icm.Start()
	assert.Nil(t, err)
	ctx := context.Background()

	t.Run("Register", func(t *testing.T) {

	})
	t.Run("GetComponentStates", func(t *testing.T) {
		states, err := icm.GetComponentStates(ctx)
		assert.Nil(t, err)
		assert.Equal(t, internalpb.StateCode_Healthy, states.State.StateCode)
	})

	t.Run("GetTimeTickChannel", func(t *testing.T) {
		resp, err := icm.GetTimeTickChannel(ctx)
		assert.Nil(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	})

	t.Run("GetStatisticsChannel", func(t *testing.T) {
		resp, err := icm.GetStatisticsChannel(ctx)
		assert.Nil(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	})

	t.Run("BuildIndex", func(t *testing.T) {
		req := &indexpb.BuildIndexRequest{
			IndexBuildID: 0,
			IndexID:      0,
			DataPaths:    []string{},
		}
		resp, err := icm.BuildIndex(ctx, req)
		assert.Nil(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
	})

	t.Run("GetIndexStates", func(t *testing.T) {
		req := &indexpb.GetIndexStatesRequest{
			IndexBuildIDs: []UniqueID{0},
		}
		resp, err := icm.GetIndexStates(ctx, req)
		assert.Nil(t, err)
		assert.Equal(t, len(req.IndexBuildIDs), len(resp.States))
		assert.Equal(t, commonpb.IndexState_Finished, resp.States[0].State)
	})

	t.Run("DropIndex", func(t *testing.T) {
		req := &indexpb.DropIndexRequest{
			IndexID: 0,
		}
		resp, err := icm.DropIndex(ctx, req)
		assert.Nil(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.ErrorCode)
	})

	t.Run("GetIndexFilePaths", func(t *testing.T) {
		req := &indexpb.GetIndexFilePathsRequest{
			IndexBuildIDs: []UniqueID{0, 1},
		}
		resp, err := icm.GetIndexFilePaths(ctx, req)
		assert.Nil(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
		assert.Equal(t, len(req.IndexBuildIDs), len(resp.FilePaths))
	})

	t.Run("GetMetrics", func(t *testing.T) {
		req := &milvuspb.GetMetricsRequest{
			Request: "",
		}
		resp, err := icm.GetMetrics(ctx, req)
		assert.Nil(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, resp.Status.ErrorCode)
		assert.Equal(t, "IndexCoord", resp.ComponentName)
	})

	err = icm.Stop()
	assert.Nil(t, err)
}

func TestIndexCoordMockError(t *testing.T) {
	icm := Mock{
		Failure: true,
	}
	err := icm.Init()
	assert.NotNil(t, err)
	err = icm.Start()
	assert.NotNil(t, err)
	ctx := context.Background()

	t.Run("Register", func(t *testing.T) {
		err = icm.Register()
		assert.NotNil(t, err)
	})
	t.Run("GetComponentStates", func(t *testing.T) {
		states, err := icm.GetComponentStates(ctx)
		assert.NotNil(t, err)
		assert.Equal(t, internalpb.StateCode_Abnormal, states.State.StateCode)
	})

	t.Run("GetTimeTickChannel", func(t *testing.T) {
		resp, err := icm.GetTimeTickChannel(ctx)
		assert.NotNil(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, resp.Status.ErrorCode)
	})

	t.Run("GetStatisticsChannel", func(t *testing.T) {
		resp, err := icm.GetStatisticsChannel(ctx)
		assert.NotNil(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, resp.Status.ErrorCode)
	})

	t.Run("BuildIndex", func(t *testing.T) {
		req := &indexpb.BuildIndexRequest{
			IndexBuildID: 0,
			IndexID:      0,
			DataPaths:    []string{},
		}
		resp, err := icm.BuildIndex(ctx, req)
		assert.NotNil(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, resp.Status.ErrorCode)
	})

	t.Run("GetIndexStates", func(t *testing.T) {
		req := &indexpb.GetIndexStatesRequest{
			IndexBuildIDs: []UniqueID{0},
		}
		resp, err := icm.GetIndexStates(ctx, req)
		assert.NotNil(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, resp.Status.ErrorCode)
	})

	t.Run("DropIndex", func(t *testing.T) {
		req := &indexpb.DropIndexRequest{
			IndexID: 0,
		}
		resp, err := icm.DropIndex(ctx, req)
		assert.NotNil(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, resp.ErrorCode)
	})

	t.Run("GetIndexFilePaths", func(t *testing.T) {
		req := &indexpb.GetIndexFilePathsRequest{
			IndexBuildIDs: []UniqueID{0, 1},
		}
		resp, err := icm.GetIndexFilePaths(ctx, req)
		assert.NotNil(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, resp.Status.ErrorCode)
	})

	t.Run("GetMetrics", func(t *testing.T) {
		req := &milvuspb.GetMetricsRequest{
			Request: "",
		}
		resp, err := icm.GetMetrics(ctx, req)
		assert.NotNil(t, err)
		assert.Equal(t, commonpb.ErrorCode_UnexpectedError, resp.Status.ErrorCode)
	})

	err = icm.Stop()
	assert.NotNil(t, err)
}
