/*
 * # 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 embedding

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"os"
	"testing"

	"github.com/stretchr/testify/suite"

	"github.com/milvus-io/milvus-proto/go-api/v3/commonpb"
	"github.com/milvus-io/milvus-proto/go-api/v3/schemapb"
	"github.com/milvus-io/milvus/internal/util/credentials"
	"github.com/milvus-io/milvus/internal/util/function/models"
	"github.com/milvus-io/milvus/internal/util/function/models/vertexai"
)

func TestVertexAITextEmbeddingProvider(t *testing.T) {
	suite.Run(t, new(VertexAITextEmbeddingProviderSuite))
}

type VertexAITextEmbeddingProviderSuite struct {
	suite.Suite
	schema    *schemapb.CollectionSchema
	providers []string
}

func (s *VertexAITextEmbeddingProviderSuite) SetupTest() {
	s.schema = &schemapb.CollectionSchema{
		Name: "test",
		Fields: []*schemapb.FieldSchema{
			{FieldID: 100, Name: "int64", DataType: schemapb.DataType_Int64},
			{FieldID: 101, Name: "text", DataType: schemapb.DataType_VarChar},
			{
				FieldID: 102, Name: "vector", DataType: schemapb.DataType_FloatVector,
				TypeParams: []*commonpb.KeyValuePair{
					{Key: "dim", Value: "4"},
				},
			},
		},
	}
}

func createVertexAIGeminiProvider(url string, schema *schemapb.FieldSchema) (textEmbeddingProvider, error) {
	functionSchema := &schemapb.FunctionSchema{
		Name:             "test",
		Type:             schemapb.FunctionType_Unknown,
		InputFieldNames:  []string{"text"},
		OutputFieldNames: []string{"vector"},
		InputFieldIds:    []int64{101},
		OutputFieldIds:   []int64{102},
		Params: []*commonpb.KeyValuePair{
			{Key: models.ModelNameParamKey, Value: "gemini-embedding-2-preview"},
			{Key: models.LocationParamKey, Value: "mock_local"},
			{Key: models.ProjectIDParamKey, Value: "mock_id"},
			{Key: models.DimParamKey, Value: "4"},
		},
	}
	mockClient := vertexai.NewVertexAIEmbedding(url, []byte{1, 2, 3}, "mock scope", "mock token")
	return NewVertexAIEmbeddingProvider(schema, functionSchema, mockClient, map[string]string{models.URLParamKey: url}, credentials.NewCredentials(map[string]string{"mock.credential_json": "mock"}), &models.ModelExtraInfo{ClusterID: "test-cluster", DBName: "test-db", BatchFactor: 5})
}

func createVertexAIProvider(url string, schema *schemapb.FieldSchema) (textEmbeddingProvider, error) {
	functionSchema := &schemapb.FunctionSchema{
		Name:             "test",
		Type:             schemapb.FunctionType_Unknown,
		InputFieldNames:  []string{"text"},
		OutputFieldNames: []string{"vector"},
		InputFieldIds:    []int64{101},
		OutputFieldIds:   []int64{102},
		Params: []*commonpb.KeyValuePair{
			{Key: models.ModelNameParamKey, Value: TestModel},
			{Key: models.LocationParamKey, Value: "mock_local"},
			{Key: models.ProjectIDParamKey, Value: "mock_id"},
			{Key: models.TaskTypeParamKey, Value: vertexAICodeRetrival},
			{Key: models.URLParamKey, Value: url},
			{Key: models.DimParamKey, Value: "4"},
		},
	}
	mockClient := vertexai.NewVertexAIEmbedding(url, []byte{1, 2, 3}, "mock scope", "mock token")
	return NewVertexAIEmbeddingProvider(schema, functionSchema, mockClient, map[string]string{}, credentials.NewCredentials(map[string]string{"mock.credential_json": "mock"}), &models.ModelExtraInfo{ClusterID: "test-cluster", DBName: "test-db", BatchFactor: 5})
}

func (s *VertexAITextEmbeddingProviderSuite) TestEmbedding() {
	ts := CreateVertexAIEmbeddingServer()

	defer ts.Close()
	provder, err := createVertexAIProvider(ts.URL, s.schema.Fields[2])
	s.NoError(err)
	{
		data := []string{"sentence"}
		r, err2 := provder.CallEmbedding(context.Background(), data, models.InsertMode)
		ret := r.([][]float32)
		s.NoError(err2)
		s.Equal(1, len(ret))
		s.Equal(4, len(ret[0]))
		s.Equal([]float32{0.0, 1.0, 2.0, 3.0}, ret[0])
	}
	{
		data := []string{"sentence 1", "sentence 2", "sentence 3"}
		ret, _ := provder.CallEmbedding(context.Background(), data, models.SearchMode)
		s.Equal([][]float32{{0.0, 1.0, 2.0, 3.0}, {1.0, 2.0, 3.0, 4.0}, {2.0, 3.0, 4.0, 5.0}}, ret)
	}
}

func (s *VertexAITextEmbeddingProviderSuite) TestEmbeddingDimNotMatch() {
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		var res vertexai.EmbeddingResponse
		res.Predictions = append(res.Predictions, vertexai.Prediction{
			Embeddings: vertexai.Embeddings{
				Statistics: vertexai.Statistics{
					Truncated:  false,
					TokenCount: 10,
				},
				Values: []float32{1.0, 1.0, 1.0, 1.0},
			},
		})
		res.Predictions = append(res.Predictions, vertexai.Prediction{
			Embeddings: vertexai.Embeddings{
				Statistics: vertexai.Statistics{
					Truncated:  false,
					TokenCount: 10,
				},
				Values: []float32{1.0, 1.0},
			},
		})

		res.Metadata = vertexai.Metadata{
			BillableCharacterCount: 100,
		}

		w.WriteHeader(http.StatusOK)
		data, _ := json.Marshal(res)
		w.Write(data)
	}))

	defer ts.Close()
	provder, err := createVertexAIProvider(ts.URL, s.schema.Fields[2])
	s.NoError(err)

	// embedding dim not match
	data := []string{"sentence", "sentence"}
	_, err2 := provder.CallEmbedding(context.Background(), data, models.InsertMode)
	s.Error(err2)
}

func (s *VertexAITextEmbeddingProviderSuite) TestEmbeddingNubmerNotMatch() {
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		var res vertexai.EmbeddingResponse
		res.Predictions = append(res.Predictions, vertexai.Prediction{
			Embeddings: vertexai.Embeddings{
				Statistics: vertexai.Statistics{
					Truncated:  false,
					TokenCount: 10,
				},
				Values: []float32{1.0, 1.0, 1.0, 1.0},
			},
		})
		res.Metadata = vertexai.Metadata{
			BillableCharacterCount: 100,
		}

		w.WriteHeader(http.StatusOK)
		data, _ := json.Marshal(res)
		w.Write(data)
	}))

	defer ts.Close()
	provder, err := createVertexAIProvider(ts.URL, s.schema.Fields[2])

	s.NoError(err)

	// embedding dim not match
	data := []string{"sentence", "sentence2"}
	_, err2 := provder.CallEmbedding(context.Background(), data, models.InsertMode)
	s.Error(err2)
}

func (s *VertexAITextEmbeddingProviderSuite) TestGetVertexAIJsonKey() {
	os.Setenv(models.VertexServiceAccountJSONEnv, "ErrorPath")
	defer os.Unsetenv(models.VertexServiceAccountJSONEnv)
	_, err := getVertexAIJsonKey()
	s.Error(err)
}

func (s *VertexAITextEmbeddingProviderSuite) TestGetTaskType() {
	functionSchema := &schemapb.FunctionSchema{
		Name:             "test",
		Type:             schemapb.FunctionType_Unknown,
		InputFieldNames:  []string{"text"},
		OutputFieldNames: []string{"vector"},
		InputFieldIds:    []int64{101},
		OutputFieldIds:   []int64{102},
		Params: []*commonpb.KeyValuePair{
			{Key: models.ModelNameParamKey, Value: TestModel},
			{Key: models.ProjectIDParamKey, Value: "mock_id"},
			{Key: models.DimParamKey, Value: "4"},
		},
	}
	mockClient := vertexai.NewVertexAIEmbedding("mock_url", []byte{1, 2, 3}, "mock scope", "mock token")

	{
		provider, err := NewVertexAIEmbeddingProvider(s.schema.Fields[2], functionSchema, mockClient, map[string]string{}, credentials.NewCredentials(map[string]string{"mock.credential_json": "mock"}), &models.ModelExtraInfo{ClusterID: "test-cluster", DBName: "test-db"})
		s.NoError(err)
		s.Equal(provider.getTaskType(models.InsertMode), "RETRIEVAL_DOCUMENT")
		s.Equal(provider.getTaskType(models.SearchMode), "RETRIEVAL_QUERY")
	}

	{
		functionSchema.Params = append(functionSchema.Params, &commonpb.KeyValuePair{Key: models.TaskTypeParamKey, Value: vertexAICodeRetrival})
		provider, err := NewVertexAIEmbeddingProvider(s.schema.Fields[2], functionSchema, mockClient, map[string]string{}, credentials.NewCredentials(map[string]string{"mock.credential_json": "mock"}), &models.ModelExtraInfo{ClusterID: "test-cluster", DBName: "test-db"})
		s.NoError(err)
		s.Equal(provider.getTaskType(models.InsertMode), "RETRIEVAL_DOCUMENT")
		s.Equal(provider.getTaskType(models.SearchMode), "CODE_RETRIEVAL_QUERY")
	}

	{
		functionSchema.Params[3] = &commonpb.KeyValuePair{Key: models.TaskTypeParamKey, Value: vertexAISTS}
		provider, err := NewVertexAIEmbeddingProvider(s.schema.Fields[2], functionSchema, mockClient, map[string]string{}, credentials.NewCredentials(map[string]string{"mock.credential_json": "mock"}), &models.ModelExtraInfo{ClusterID: "test-cluster", DBName: "test-db"})
		s.NoError(err)
		s.Equal(provider.getTaskType(models.InsertMode), "SEMANTIC_SIMILARITY")
		s.Equal(provider.getTaskType(models.SearchMode), "SEMANTIC_SIMILARITY")
	}
}

func (s *VertexAITextEmbeddingProviderSuite) TestNewVertexAIEmbeddingProvider() {
	functionSchema := &schemapb.FunctionSchema{
		Name:             "test",
		Type:             schemapb.FunctionType_Unknown,
		InputFieldNames:  []string{"text"},
		OutputFieldNames: []string{"vector"},
		InputFieldIds:    []int64{101},
		OutputFieldIds:   []int64{102},
		Params: []*commonpb.KeyValuePair{
			{Key: models.ModelNameParamKey, Value: TestModel},
			{Key: models.ProjectIDParamKey, Value: "mock_id"},
			{Key: models.DimParamKey, Value: "4"},
		},
	}
	mockClient := vertexai.NewVertexAIEmbedding("mock_url", []byte{1, 2, 3}, "mock scope", "mock token")
	provider, err := NewVertexAIEmbeddingProvider(s.schema.Fields[2], functionSchema, mockClient, map[string]string{}, credentials.NewCredentials(map[string]string{"mock.credential_json": "mock"}), &models.ModelExtraInfo{ClusterID: "test-cluster", DBName: "test-db", BatchFactor: 5})
	s.NoError(err)
	s.True(provider.MaxBatch() > 0)
	s.Equal(provider.FieldDim(), int64(4))
}

func (s *VertexAITextEmbeddingProviderSuite) TestGeminiEmbedding() {
	ts := CreateVertexAIGeminiEmbeddingServer()
	defer ts.Close()
	provider, err := createVertexAIGeminiProvider(ts.URL, s.schema.Fields[2])
	s.NoError(err)
	{
		data := []string{"sentence"}
		r, err2 := provider.CallEmbedding(context.Background(), data, models.InsertMode)
		ret := r.([][]float32)
		s.NoError(err2)
		s.Equal(1, len(ret))
		s.Equal(4, len(ret[0]))
		s.Equal([]float32{0.0, 1.0, 2.0, 3.0}, ret[0])
	}
	{
		// counter continues from 1 (previous call used 0)
		data := []string{"sentence 1", "sentence 2", "sentence 3"}
		ret, _ := provider.CallEmbedding(context.Background(), data, models.SearchMode)
		s.Equal([][]float32{{1.0, 2.0, 3.0, 4.0}, {2.0, 3.0, 4.0, 5.0}, {3.0, 4.0, 5.0, 6.0}}, ret)
	}
}

func (s *VertexAITextEmbeddingProviderSuite) TestGeminiEmbeddingDimNotMatch() {
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		res := vertexai.GeminiEmbedContentResponse{
			Embedding: vertexai.GeminiEmbeddingValues{
				Values: []float32{1.0, 1.0},
			},
		}
		w.WriteHeader(http.StatusOK)
		data, _ := json.Marshal(res)
		w.Write(data)
	}))
	defer ts.Close()
	provider, err := createVertexAIGeminiProvider(ts.URL, s.schema.Fields[2])
	s.NoError(err)
	data := []string{"sentence"}
	_, err2 := provider.CallEmbedding(context.Background(), data, models.InsertMode)
	s.Error(err2)
}

func (s *VertexAITextEmbeddingProviderSuite) TestGeminiEmbeddingError() {
	ts := CreateErrorEmbeddingServer()
	defer ts.Close()
	provider, err := createVertexAIGeminiProvider(ts.URL, s.schema.Fields[2])
	s.NoError(err)
	data := []string{"sentence"}
	_, err2 := provider.CallEmbedding(context.Background(), data, models.InsertMode)
	s.Error(err2)
}

func (s *VertexAITextEmbeddingProviderSuite) TestIsGeminiModel() {
	s.True(isGeminiModel("gemini-embedding-2-preview"))
	s.True(isGeminiModel("gemini-embedding-2-0"))
	s.False(isGeminiModel("gemini-embedding-001"))
	s.False(isGeminiModel("text-embedding-004"))
	s.False(isGeminiModel("textembedding-gecko"))
}

func (s *VertexAITextEmbeddingProviderSuite) TestGeminiGetTaskType() {
	functionSchema := &schemapb.FunctionSchema{
		Name:             "test",
		Type:             schemapb.FunctionType_Unknown,
		InputFieldNames:  []string{"text"},
		OutputFieldNames: []string{"vector"},
		InputFieldIds:    []int64{101},
		OutputFieldIds:   []int64{102},
		Params: []*commonpb.KeyValuePair{
			{Key: models.ModelNameParamKey, Value: "gemini-embedding-2-preview"},
			{Key: models.ProjectIDParamKey, Value: "mock_id"},
			{Key: models.DimParamKey, Value: "4"},
		},
	}
	mockClient := vertexai.NewVertexAIEmbedding("mock_url", []byte{1, 2, 3}, "mock scope", "mock token")

	{
		provider, err := NewVertexAIEmbeddingProvider(s.schema.Fields[2], functionSchema, mockClient, map[string]string{}, credentials.NewCredentials(map[string]string{"mock.credential_json": "mock"}), &models.ModelExtraInfo{ClusterID: "test-cluster", DBName: "test-db"})
		s.NoError(err)
		s.True(provider.isGemini)
		s.Equal("RETRIEVAL_DOCUMENT", provider.getTaskType(models.InsertMode))
		s.Equal("RETRIEVAL_QUERY", provider.getTaskType(models.SearchMode))
	}

	{
		functionSchema.Params = append(functionSchema.Params, &commonpb.KeyValuePair{Key: models.TaskTypeParamKey, Value: "SEMANTIC_SIMILARITY"})
		provider, err := NewVertexAIEmbeddingProvider(s.schema.Fields[2], functionSchema, mockClient, map[string]string{}, credentials.NewCredentials(map[string]string{"mock.credential_json": "mock"}), &models.ModelExtraInfo{ClusterID: "test-cluster", DBName: "test-db"})
		s.NoError(err)
		s.Equal("SEMANTIC_SIMILARITY", provider.getTaskType(models.InsertMode))
		s.Equal("SEMANTIC_SIMILARITY", provider.getTaskType(models.SearchMode))
	}
}

func (s *VertexAITextEmbeddingProviderSuite) TestParseCredentail() {
	{
		cred := credentials.NewCredentials(map[string]string{})
		data, err := parseGcpCredentialInfo(cred, []*commonpb.KeyValuePair{}, map[string]string{})
		s.Nil(data)
		s.ErrorContains(err, "VetexAI credentials file path is empty")
	}
	{
		os.Setenv(models.VertexServiceAccountJSONEnv, "mock.json")
		defer os.Unsetenv(models.VertexServiceAccountJSONEnv)
		cred := credentials.NewCredentials(map[string]string{})
		data, err := parseGcpCredentialInfo(cred, []*commonpb.KeyValuePair{}, map[string]string{})
		s.Nil(data)
		s.ErrorContains(err, "Vertexai: read credentials file failed")
	}
	{
		cred := credentials.NewCredentials(map[string]string{})
		_, err := parseGcpCredentialInfo(cred, []*commonpb.KeyValuePair{}, map[string]string{"credential": "noExist"})
		s.ErrorContains(err, "is not a gcp crediential, can not find key")
	}
	{
		cred := credentials.NewCredentials(map[string]string{"mock.credential_json": "NotBase64"})
		_, err := parseGcpCredentialInfo(cred, []*commonpb.KeyValuePair{}, map[string]string{"credential": "mock"})
		s.ErrorContains(err, "parse gcp credential")
	}
	{
		cred := credentials.NewCredentials(map[string]string{"mock.credential_json": "bW9jaw=="}) //nolint:gosec // not a real credential, test data
		_, err := parseGcpCredentialInfo(cred, []*commonpb.KeyValuePair{}, map[string]string{"credential": "mock"})
		s.NoError(err)
	}
}
