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

func Test_alterCollectionTask_Prepare(t *testing.T) {
	t.Run("invalid collectionID", func(t *testing.T) {
		task := &alterCollectionTask{Req: &milvuspb.AlterCollectionRequest{Base: &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollection}}}
		err := task.Prepare(context.Background())
		assert.Error(t, err)
	})

	t.Run("normal case", func(t *testing.T) {
		task := &alterCollectionTask{
			Req: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollection},
				CollectionName: "cn",
			},
		}
		err := task.Prepare(context.Background())
		assert.NoError(t, err)
	})
}

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

	t.Run("properties is empty", func(t *testing.T) {
		task := &alterCollectionTask{Req: &milvuspb.AlterCollectionRequest{Base: &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollection}}}
		err := task.Execute(context.Background())
		assert.Error(t, err)
	})

	t.Run("failed to create alias", func(t *testing.T) {
		core := newTestCore(withInvalidMeta())
		task := &alterCollectionTask{
			baseTask: newBaseTask(context.Background(), core),
			Req: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollection},
				CollectionName: "cn",
				Properties:     properties,
			},
		}
		err := task.Execute(context.Background())
		assert.Error(t, err)
	})

	t.Run("alter step failed", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByName",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(&model.Collection{CollectionID: int64(1)}, nil)
		meta.On("AlterCollection",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(errors.New("err"))
		meta.On("ListAliasesByID", mock.Anything, mock.Anything).Return([]string{})

		core := newTestCore(withValidProxyManager(), withMeta(meta))
		task := &alterCollectionTask{
			baseTask: newBaseTask(context.Background(), core),
			Req: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollection},
				CollectionName: "cn",
				Properties:     properties,
			},
		}

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

	t.Run("broadcast step failed", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByName",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(&model.Collection{CollectionID: int64(1)}, nil)
		meta.On("AlterCollection",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(nil)
		meta.On("ListAliasesByID", mock.Anything, mock.Anything).Return([]string{})

		broker := newMockBroker()
		broker.BroadcastAlteredCollectionFunc = func(ctx context.Context, req *milvuspb.AlterCollectionRequest) error {
			return errors.New("err")
		}

		core := newTestCore(withValidProxyManager(), withMeta(meta), withBroker(broker))
		task := &alterCollectionTask{
			baseTask: newBaseTask(context.Background(), core),
			Req: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollection},
				CollectionName: "cn",
				Properties:     properties,
			},
		}

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

	t.Run("expire cache failed", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByName",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(&model.Collection{CollectionID: int64(1)}, nil)
		meta.On("AlterCollection",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(nil)
		meta.On("ListAliasesByID", mock.Anything, mock.Anything).Return([]string{})

		broker := newMockBroker()
		broker.BroadcastAlteredCollectionFunc = func(ctx context.Context, req *milvuspb.AlterCollectionRequest) error {
			return errors.New("err")
		}

		core := newTestCore(withInvalidProxyManager(), withMeta(meta), withBroker(broker))
		task := &alterCollectionTask{
			baseTask: newBaseTask(context.Background(), core),
			Req: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollection},
				CollectionName: "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("GetCollectionByName",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(&model.Collection{
			CollectionID: int64(1),
			Properties: []*commonpb.KeyValuePair{
				{
					Key:   common.CollectionTTLConfigKey,
					Value: "1",
				},
				{
					Key:   common.CollectionAutoCompactionKey,
					Value: "true",
				},
			},
		}, nil)
		core := newTestCore(withValidProxyManager(), withMeta(meta))
		task := &alterCollectionTask{
			baseTask: newBaseTask(context.Background(), core),
			Req: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollection},
				CollectionName: "cn",
				Properties: []*commonpb.KeyValuePair{
					{
						Key:   common.CollectionAutoCompactionKey,
						Value: "true",
					},
				},
			},
		}

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

	t.Run("alter successfully2", func(t *testing.T) {
		meta := mockrootcoord.NewIMetaTable(t)
		meta.On("GetCollectionByName",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(&model.Collection{
			CollectionID: int64(1),
			Name:         "cn",
			DBName:       "foo",
			Properties: []*commonpb.KeyValuePair{
				{
					Key:   common.ReplicateIDKey,
					Value: "local-test",
				},
			},
			PhysicalChannelNames: []string{"by-dev-rootcoord-dml_1"},
		}, nil)
		meta.On("AlterCollection",
			mock.Anything,
			mock.Anything,
			mock.Anything,
			mock.Anything,
		).Return(nil)
		meta.On("ListAliasesByID", mock.Anything, mock.Anything).Return([]string{})

		broker := newMockBroker()
		broker.BroadcastAlteredCollectionFunc = func(ctx context.Context, req *milvuspb.AlterCollectionRequest) error {
			return nil
		}
		packChan := make(chan *msgstream.MsgPack, 10)
		ticker := newChanTimeTickSync(packChan)
		ticker.addDmlChannels("by-dev-rootcoord-dml_1")

		core := newTestCore(withValidProxyManager(), withMeta(meta), withBroker(broker), withTtSynchronizer(ticker))
		newPros := append(properties, &commonpb.KeyValuePair{
			Key:   common.ReplicateEndTSKey,
			Value: "10000",
		})
		task := &alterCollectionTask{
			baseTask: newBaseTask(context.Background(), core),
			Req: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollection},
				CollectionName: "cn",
				Properties:     newPros,
			},
		}

		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].Type())
			replicateMsg := pack.Msgs[0].(*msgstream.ReplicateMsg)
			assert.Equal(t, "foo", replicateMsg.ReplicateMsg.GetDatabase())
			assert.Equal(t, "cn", replicateMsg.ReplicateMsg.GetCollection())
			assert.True(t, replicateMsg.ReplicateMsg.GetIsEnd())
		default:
			assert.Fail(t, "no message sent")
		}
	})

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

		updateProps1 := []*commonpb.KeyValuePair{
			{
				Key:   common.CollectionAutoCompactionKey,
				Value: "true",
			},
		}
		coll.Properties = MergeProperties(coll.Properties, updateProps1)

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

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

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

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

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

		updatePropsIso := []*commonpb.KeyValuePair{
			{
				Key:   common.PartitionKeyIsolationKey,
				Value: "true",
			},
		}
		coll.Properties = MergeProperties(coll.Properties, updatePropsIso)
		assert.Contains(t, coll.Properties, &commonpb.KeyValuePair{
			Key:   common.PartitionKeyIsolationKey,
			Value: "true",
		})
	})

	t.Run("test delete collection props", func(t *testing.T) {
		coll := &model.Collection{
			Properties: []*commonpb.KeyValuePair{
				{
					Key:   common.CollectionTTLConfigKey,
					Value: "1",
				},
				{
					Key:   common.CollectionAutoCompactionKey,
					Value: "true",
				},
			},
		}

		deleteKeys := []string{common.CollectionTTLConfigKey}
		coll.Properties = DeleteProperties(coll.Properties, deleteKeys)
		assert.NotContains(t, coll.Properties, &commonpb.KeyValuePair{
			Key:   common.CollectionTTLConfigKey,
			Value: "1",
		})

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

		deleteKeys = []string{"nonexistent.key"}
		coll.Properties = DeleteProperties(coll.Properties, deleteKeys)
		assert.Contains(t, coll.Properties, &commonpb.KeyValuePair{
			Key:   common.CollectionAutoCompactionKey,
			Value: "true",
		})

		deleteKeys = []string{common.CollectionAutoCompactionKey}
		coll.Properties = DeleteProperties(coll.Properties, deleteKeys)
		assert.Empty(t, coll.Properties)
	})
}