// Licensed to the LF AI & Data foundation under one
// or more contributor license agreementassert. 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 datacoord

import (
	"testing"

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

	"github.com/milvus-io/milvus/internal/metastore/mocks"
	"github.com/milvus-io/milvus/internal/proto/datapb"
	"github.com/milvus-io/milvus/internal/proto/internalpb"
)

func TestImportMeta_Restore(t *testing.T) {
	catalog := mocks.NewDataCoordCatalog(t)
	catalog.EXPECT().ListImportJobs().Return([]*datapb.ImportJob{{JobID: 0}}, nil)
	catalog.EXPECT().ListPreImportTasks().Return([]*datapb.PreImportTask{{TaskID: 1}}, nil)
	catalog.EXPECT().ListImportTasks().Return([]*datapb.ImportTaskV2{{TaskID: 2}}, nil)

	im, err := NewImportMeta(catalog)
	assert.NoError(t, err)

	jobs := im.GetJobBy()
	assert.Equal(t, 1, len(jobs))
	assert.Equal(t, int64(0), jobs[0].GetJobID())
	tasks := im.GetTaskBy()
	assert.Equal(t, 2, len(tasks))
	tasks = im.GetTaskBy(WithType(PreImportTaskType))
	assert.Equal(t, 1, len(tasks))
	assert.Equal(t, int64(1), tasks[0].GetTaskID())
	tasks = im.GetTaskBy(WithType(ImportTaskType))
	assert.Equal(t, 1, len(tasks))
	assert.Equal(t, int64(2), tasks[0].GetTaskID())

	// new meta failed
	mockErr := errors.New("mock error")
	catalog = mocks.NewDataCoordCatalog(t)
	catalog.EXPECT().ListPreImportTasks().Return([]*datapb.PreImportTask{{TaskID: 1}}, mockErr)
	_, err = NewImportMeta(catalog)
	assert.Error(t, err)

	catalog = mocks.NewDataCoordCatalog(t)
	catalog.EXPECT().ListImportTasks().Return([]*datapb.ImportTaskV2{{TaskID: 2}}, mockErr)
	catalog.EXPECT().ListPreImportTasks().Return([]*datapb.PreImportTask{{TaskID: 1}}, nil)
	_, err = NewImportMeta(catalog)
	assert.Error(t, err)

	catalog = mocks.NewDataCoordCatalog(t)
	catalog.EXPECT().ListImportJobs().Return([]*datapb.ImportJob{{JobID: 0}}, mockErr)
	catalog.EXPECT().ListPreImportTasks().Return([]*datapb.PreImportTask{{TaskID: 1}}, nil)
	catalog.EXPECT().ListImportTasks().Return([]*datapb.ImportTaskV2{{TaskID: 2}}, nil)
	_, err = NewImportMeta(catalog)
	assert.Error(t, err)
}

func TestImportMeta_ImportJob(t *testing.T) {
	catalog := mocks.NewDataCoordCatalog(t)
	catalog.EXPECT().ListImportJobs().Return(nil, nil)
	catalog.EXPECT().ListPreImportTasks().Return(nil, nil)
	catalog.EXPECT().ListImportTasks().Return(nil, nil)
	catalog.EXPECT().SaveImportJob(mock.Anything).Return(nil)
	catalog.EXPECT().DropImportJob(mock.Anything).Return(nil)

	im, err := NewImportMeta(catalog)
	assert.NoError(t, err)

	var job ImportJob = &importJob{
		ImportJob: &datapb.ImportJob{
			JobID:        0,
			CollectionID: 1,
			PartitionIDs: []int64{2},
			Vchannels:    []string{"ch0"},
			State:        internalpb.ImportJobState_Pending,
		},
	}

	err = im.AddJob(job)
	assert.NoError(t, err)
	jobs := im.GetJobBy()
	assert.Equal(t, 1, len(jobs))
	err = im.AddJob(job)
	assert.NoError(t, err)
	jobs = im.GetJobBy()
	assert.Equal(t, 1, len(jobs))

	assert.Nil(t, job.GetSchema())
	err = im.UpdateJob(job.GetJobID(), UpdateJobState(internalpb.ImportJobState_Completed))
	assert.NoError(t, err)
	job2 := im.GetJob(job.GetJobID())
	assert.Equal(t, internalpb.ImportJobState_Completed, job2.GetState())
	assert.Equal(t, job.GetJobID(), job2.GetJobID())
	assert.Equal(t, job.GetCollectionID(), job2.GetCollectionID())
	assert.Equal(t, job.GetPartitionIDs(), job2.GetPartitionIDs())
	assert.Equal(t, job.GetVchannels(), job2.GetVchannels())

	err = im.RemoveJob(job.GetJobID())
	assert.NoError(t, err)
	jobs = im.GetJobBy()
	assert.Equal(t, 0, len(jobs))

	// test failed
	mockErr := errors.New("mock err")
	catalog = mocks.NewDataCoordCatalog(t)
	catalog.EXPECT().SaveImportJob(mock.Anything).Return(mockErr)
	catalog.EXPECT().DropImportJob(mock.Anything).Return(mockErr)
	im.(*importMeta).catalog = catalog

	err = im.AddJob(job)
	assert.Error(t, err)
	im.(*importMeta).jobs[job.GetJobID()] = job
	err = im.UpdateJob(job.GetJobID())
	assert.Error(t, err)
	err = im.RemoveJob(job.GetJobID())
	assert.Error(t, err)
}

func TestImportMeta_ImportTask(t *testing.T) {
	catalog := mocks.NewDataCoordCatalog(t)
	catalog.EXPECT().ListImportJobs().Return(nil, nil)
	catalog.EXPECT().ListPreImportTasks().Return(nil, nil)
	catalog.EXPECT().ListImportTasks().Return(nil, nil)
	catalog.EXPECT().SaveImportTask(mock.Anything).Return(nil)
	catalog.EXPECT().DropImportTask(mock.Anything).Return(nil)

	im, err := NewImportMeta(catalog)
	assert.NoError(t, err)

	task1 := &importTask{
		ImportTaskV2: &datapb.ImportTaskV2{
			JobID:        1,
			TaskID:       2,
			CollectionID: 3,
			SegmentIDs:   []int64{5, 6},
			NodeID:       7,
			State:        datapb.ImportTaskStateV2_Pending,
		},
	}
	err = im.AddTask(task1)
	assert.NoError(t, err)
	err = im.AddTask(task1)
	assert.NoError(t, err)
	res := im.GetTask(task1.GetTaskID())
	assert.Equal(t, task1, res)

	task2 := task1.Clone()
	task2.(*importTask).TaskID = 8
	task2.(*importTask).State = datapb.ImportTaskStateV2_Completed
	err = im.AddTask(task2)
	assert.NoError(t, err)

	tasks := im.GetTaskBy(WithJob(task1.GetJobID()))
	assert.Equal(t, 2, len(tasks))
	tasks = im.GetTaskBy(WithType(ImportTaskType), WithStates(datapb.ImportTaskStateV2_Completed))
	assert.Equal(t, 1, len(tasks))
	assert.Equal(t, task2.GetTaskID(), tasks[0].GetTaskID())

	err = im.UpdateTask(task1.GetTaskID(), UpdateNodeID(9),
		UpdateState(datapb.ImportTaskStateV2_Failed),
		UpdateFileStats([]*datapb.ImportFileStats{1: {
			FileSize: 100,
		}}))
	assert.NoError(t, err)
	task := im.GetTask(task1.GetTaskID())
	assert.Equal(t, int64(9), task.GetNodeID())
	assert.Equal(t, datapb.ImportTaskStateV2_Failed, task.GetState())

	err = im.RemoveTask(task1.GetTaskID())
	assert.NoError(t, err)
	tasks = im.GetTaskBy()
	assert.Equal(t, 1, len(tasks))
	err = im.RemoveTask(10)
	assert.NoError(t, err)
	tasks = im.GetTaskBy()
	assert.Equal(t, 1, len(tasks))

	// test failed
	mockErr := errors.New("mock err")
	catalog = mocks.NewDataCoordCatalog(t)
	catalog.EXPECT().SaveImportTask(mock.Anything).Return(mockErr)
	catalog.EXPECT().DropImportTask(mock.Anything).Return(mockErr)
	im.(*importMeta).catalog = catalog

	err = im.AddTask(task1)
	assert.Error(t, err)
	im.(*importMeta).tasks[task1.GetTaskID()] = task1
	err = im.UpdateTask(task1.GetTaskID(), UpdateNodeID(9))
	assert.Error(t, err)
	err = im.RemoveTask(task1.GetTaskID())
	assert.Error(t, err)
}