// 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 rootcoord

import (
	"context"
	"testing"
	"time"

	"github.com/cockroachdb/errors"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
	"github.com/stretchr/testify/require"

	"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
	"github.com/milvus-io/milvus/internal/metastore/model"
	mockrootcoord "github.com/milvus-io/milvus/internal/rootcoord/mocks"
	"github.com/milvus-io/milvus/pkg/v2/common"
	"github.com/milvus-io/milvus/pkg/v2/mq/msgstream"
	"github.com/milvus-io/milvus/pkg/v2/proto/rootcoordpb"
	"github.com/milvus-io/milvus/pkg/v2/util/funcutil"
)

func Test_alterDatabaseTask_Prepare(t *testing.T) {
	t.Run("invalid collectionID", func(t *testing.T) {
		task := &alterDatabaseTask{Req: &rootcoordpb.AlterDatabaseRequest{}}
		err := task.Prepare(context.Background())
		assert.Error(t, err)
	})

	t.Run("normal case", func(t *testing.T) {
		task := &alterDatabaseTask{
			Req: &rootcoordpb.AlterDatabaseRequest{
				DbName: "cn",
			},
		}
		err := task.Prepare(context.Background())
		assert.NoError(t, err)
	})

	t.Run("replicate id", func(t *testing.T) {
		{
			// no collections
			meta := mockrootcoord.NewIMetaTable(t)
			core := newTestCore(withMeta(meta))
			meta.EXPECT().
				ListCollections(mock.Anything, mock.Anything, mock.Anything, mock.Anything).
				Return([]*model.Collection{}, nil).
				Once()
			task := &alterDatabaseTask{
				baseTask: newBaseTask(context.Background(), core),
				Req: &rootcoordpb.AlterDatabaseRequest{
					DbName: "cn",
					Properties: []*commonpb.KeyValuePair{
						{
							Key:   common.ReplicateIDKey,
							Value: "local-test",
						},
					},
				},
			}
			err := task.Prepare(context.Background())
			assert.NoError(t, err)
		}
		{
			meta := mockrootcoord.NewIMetaTable(t)
			core := newTestCore(withMeta(meta))
			meta.EXPECT().ListCollections(mock.Anything, mock.Anything, mock.Anything, mock.Anything).Return([]*model.Collection{
				{
					Name: "foo",
				},
			}, nil).Once()
			task := &alterDatabaseTask{
				baseTask: newBaseTask(context.Background(), core),
				Req: &rootcoordpb.AlterDatabaseRequest{
					DbName: "cn",
					Properties: []*commonpb.KeyValuePair{
						{
							Key:   common.ReplicateIDKey,
							Value: "local-test",
						},
					},
				},
			}
			err := task.Prepare(context.Background())
			assert.Error(t, err)
		}
		{
			meta := mockrootcoord.NewIMetaTable(t)
			core := newTestCore(withMeta(meta))
			meta.EXPECT().ListCollections(mock.Anything, mock.Anything, mock.Anything, mock.Anything).
				Return(nil, errors.New("err")).
				Once()
			task := &alterDatabaseTask{
				baseTask: newBaseTask(context.Background(), core),
				Req: &rootcoordpb.AlterDatabaseRequest{
					DbName: "cn",
					Properties: []*commonpb.KeyValuePair{
						{
							Key:   common.ReplicateIDKey,
							Value: "local-test",
						},
					},
				},
			}
			err := task.Prepare(context.Background())
			assert.Error(t, err)
		}
	})
}

func Test_alterDatabaseTask_Execute(t *testing.T) {
	properties := []*commonpb.KeyValuePair{
		{
			Key:   common.CollectionTTLConfigKey,
			Value: "3600",
		},
	}

	t.Run("properties is empty", func(t *testing.T) {
		task := &alterDatabaseTask{Req: &rootcoordpb.AlterDatabaseRequest{}}
		err := task.Execute(context.Background())
		assert.Error(t, err)
	})

	t.Run("failed to create alias", func(t *testing.T) {
		core := newTestCore(withInvalidMeta())
		task := &alterDatabaseTask{
			baseTask: newBaseTask(context.Background(), core),
			Req: &rootcoordpb.AlterDatabaseRequest{
				DbName:     "cn",
				Properties: properties,
			},
		}
		err := task.Execute(context.Background())
		assert.Error(t, err)
	})

	meta := mockrootcoord.NewIMetaTable(t)
	properties = append(properties, &commonpb.KeyValuePair{Key: common.DatabaseForceDenyReadingKey, Value: "true"})

	meta.On("GetDatabaseByName",
		mock.Anything,
		mock.Anything,
		mock.Anything,
		mock.Anything,
	).Return(&model.Database{ID: int64(1), Properties: properties}, nil).Maybe()
	meta.On("AlterDatabase",
		mock.Anything,
		mock.Anything,
		mock.Anything,
		mock.Anything,
	).Return(nil).Maybe()

	t.Run("alter skip due to no change", func(t *testing.T) {
		core := newTestCore(withMeta(meta))
		task := &alterDatabaseTask{
			baseTask: newBaseTask(context.Background(), core),
			Req: &rootcoordpb.AlterDatabaseRequest{
				DbName: "cn",
				Properties: []*commonpb.KeyValuePair{
					{
						Key:   common.DatabaseForceDenyReadingKey,
						Value: "true",
					},
				},
			},
		}

		err := task.Execute(context.Background())
		assert.NoError(t, err)
	})

	t.Run("alter step failed", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetDatabaseByName",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(&model.Database{ID: int64(1)}, nil)
		meta.On("AlterDatabase",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(errors.New("err"))

		core := newTestCore(withMeta(meta))
		task := &alterDatabaseTask{
			baseTask: newBaseTask(context.Background(), core),
			Req: &rootcoordpb.AlterDatabaseRequest{
				DbName:     "cn",
				Properties: properties,
			},
		}

		err := task.Execute(context.Background())
		assert.Error(t, err)
	})

	t.Run("alter successfully", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetDatabaseByName",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(&model.Database{
			ID:   int64(1),
			Name: "cn",
			Properties: []*commonpb.KeyValuePair{
				{
					Key:   common.ReplicateIDKey,
					Value: "local-test",
				},
			},
		}, nil)
		meta.On("AlterDatabase",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(nil)
		// the chan length should larger than 4, because newChanTimeTickSync will send 4 ts messages when execute the `broadcast` step
		packChan := make(chan *msgstream.ConsumeMsgPack, 10)
		ticker := newChanTimeTickSync(packChan)
		ticker.addDmlChannels("by-dev-rootcoord-dml_1")

		core := newTestCore(withMeta(meta), withValidProxyManager(), withTtSynchronizer(ticker))
		newPros := append(properties,
			&commonpb.KeyValuePair{Key: common.ReplicateEndTSKey, Value: "1000"},
		)
		task := &alterDatabaseTask{
			baseTask: newBaseTask(context.Background(), core),
			Req: &rootcoordpb.AlterDatabaseRequest{
				DbName:     "cn",
				Properties: newPros,
			},
		}

		unmarshalFactory := &msgstream.ProtoUDFactory{}
		unmarshalDispatcher := unmarshalFactory.NewUnmarshalDispatcher()

		err := task.Execute(context.Background())
		assert.NoError(t, err)
		time.Sleep(time.Second)
		select {
		case pack := <-packChan:
			assert.Equal(t, commonpb.MsgType_Replicate, pack.Msgs[0].GetType())

			tsMsg, err := pack.Msgs[0].Unmarshal(unmarshalDispatcher)
			require.NoError(t, err)
			replicateMsg := tsMsg.(*msgstream.ReplicateMsg)
			assert.Equal(t, "cn", replicateMsg.ReplicateMsg.GetDatabase())
			assert.True(t, replicateMsg.ReplicateMsg.GetIsEnd())
		default:
			assert.Fail(t, "no message sent")
		}
	})

	t.Run("test update collection props", func(t *testing.T) {
		oldProps := []*commonpb.KeyValuePair{
			{
				Key:   common.CollectionTTLConfigKey,
				Value: "1",
			},
		}

		updateProps1 := []*commonpb.KeyValuePair{
			{
				Key:   common.CollectionAutoCompactionKey,
				Value: "true",
			},
		}

		ret := MergeProperties(oldProps, updateProps1)

		assert.Contains(t, ret, &commonpb.KeyValuePair{
			Key:   common.CollectionTTLConfigKey,
			Value: "1",
		})

		assert.Contains(t, ret, &commonpb.KeyValuePair{
			Key:   common.CollectionAutoCompactionKey,
			Value: "true",
		})

		updateProps2 := []*commonpb.KeyValuePair{
			{
				Key:   common.CollectionTTLConfigKey,
				Value: "2",
			},
		}
		ret2 := MergeProperties(ret, updateProps2)

		assert.Contains(t, ret2, &commonpb.KeyValuePair{
			Key:   common.CollectionTTLConfigKey,
			Value: "2",
		})

		assert.Contains(t, ret2, &commonpb.KeyValuePair{
			Key:   common.CollectionAutoCompactionKey,
			Value: "true",
		})
	})

	t.Run("test delete collection props", func(t *testing.T) {
		oldProps := []*commonpb.KeyValuePair{
			{
				Key:   common.CollectionTTLConfigKey,
				Value: "1",
			},
		}

		deleteKeys := []string{
			common.CollectionAutoCompactionKey,
		}

		ret := DeleteProperties(oldProps, deleteKeys)

		assert.Contains(t, ret, &commonpb.KeyValuePair{
			Key:   common.CollectionTTLConfigKey,
			Value: "1",
		})

		oldProps2 := []*commonpb.KeyValuePair{
			{
				Key:   common.CollectionTTLConfigKey,
				Value: "1",
			},
		}

		deleteKeys2 := []string{
			common.CollectionTTLConfigKey,
		}

		ret2 := DeleteProperties(oldProps2, deleteKeys2)

		assert.Empty(t, ret2)
	})
}

func TestMergeProperties(t *testing.T) {
	p := MergeProperties([]*commonpb.KeyValuePair{
		{
			Key:   common.ReplicateIDKey,
			Value: "local-test",
		},
		{
			Key:   "foo",
			Value: "xxx",
		},
	}, []*commonpb.KeyValuePair{
		{
			Key:   common.ReplicateEndTSKey,
			Value: "1001",
		},
	})
	assert.Len(t, p, 3)
	m := funcutil.KeyValuePair2Map(p)
	assert.Equal(t, "", m[common.ReplicateIDKey])
	assert.Equal(t, "1001", m[common.ReplicateEndTSKey])
	assert.Equal(t, "xxx", m["foo"])
}