// 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 paramtable

import (
	"encoding/json"
	"strconv"
	"testing"

	"github.com/stretchr/testify/assert"

	"github.com/milvus-io/milvus/pkg/v3/common"
	"github.com/milvus-io/milvus/pkg/v3/config"
)

const (
	MetricTypeKey = common.MetricTypeKey
	IndexTypeKey  = common.IndexTypeKey
)

func TestAutoIndexParams_build(t *testing.T) {
	var CParams ComponentParam
	bt := NewBaseTable(SkipRemote(true))
	CParams.Init(bt)

	t.Run("test parseBuildParams success", func(t *testing.T) {
		// Params := CParams.AutoIndexConfig
		// buildParams := make([string]interface)
		var err error
		map1 := map[string]any{
			IndexTypeKey:     "HNSW",
			"M":              48,
			"efConstruction": 500,
		}
		var jsonStrBytes []byte
		jsonStrBytes, err = json.Marshal(map1)
		assert.NoError(t, err)
		bt.Save(CParams.AutoIndexConfig.IndexParams.Key, string(jsonStrBytes))
		assert.Equal(t, "HNSW", CParams.AutoIndexConfig.IndexType.GetValue())
		assert.Equal(t, strconv.Itoa(map1["M"].(int)), CParams.AutoIndexConfig.IndexParams.GetAsJSONMap()["M"])
		assert.Equal(t, strconv.Itoa(map1["efConstruction"].(int)), CParams.AutoIndexConfig.IndexParams.GetAsJSONMap()["efConstruction"])

		map2 := map[string]interface{}{
			IndexTypeKey: "IVF_FLAT",
			"nlist":      1024,
		}
		jsonStrBytes, err = json.Marshal(map2)
		assert.NoError(t, err)
		bt.Save(CParams.AutoIndexConfig.IndexParams.Key, string(jsonStrBytes))
		assert.Equal(t, "IVF_FLAT", CParams.AutoIndexConfig.IndexType.GetValue())
		assert.Equal(t, strconv.Itoa(map2["nlist"].(int)), CParams.AutoIndexConfig.IndexParams.GetAsJSONMap()["nlist"])
	})

	t.Run("test parseIntVectorBuildParams success", func(t *testing.T) {
		var err error
		map1 := map[string]any{
			IndexTypeKey:     "HNSW",
			"M":              24,
			"efConstruction": 200,
			"metric_type":    "COSINE",
		}
		var jsonStrBytes []byte
		jsonStrBytes, err = json.Marshal(map1)
		assert.NoError(t, err)
		bt.Save(CParams.AutoIndexConfig.IntVectorIndexParams.Key, string(jsonStrBytes))
		intVectorParams := CParams.AutoIndexConfig.IntVectorIndexParams.GetAsJSONMap()
		assert.Equal(t, "HNSW", intVectorParams[IndexTypeKey])
		assert.Equal(t, strconv.Itoa(map1["M"].(int)), intVectorParams["M"])
		assert.Equal(t, strconv.Itoa(map1["efConstruction"].(int)), intVectorParams["efConstruction"])
		assert.Equal(t, "COSINE", intVectorParams["metric_type"])
	})
	t.Run("test parseSparseBuildParams success", func(t *testing.T) {
		// Params := CParams.AutoIndexConfig
		// buildParams := make([string]interface)
		var err error
		map1 := map[string]any{
			IndexTypeKey:       "SPARSE_INVERTED_INDEX",
			"drop_ratio_build": 0.1,
		}
		var jsonStrBytes []byte
		jsonStrBytes, err = json.Marshal(map1)
		assert.NoError(t, err)
		bt.Save(CParams.AutoIndexConfig.SparseIndexParams.Key, string(jsonStrBytes))
		assert.Equal(t, "SPARSE_INVERTED_INDEX", CParams.AutoIndexConfig.SparseIndexParams.GetAsJSONMap()[IndexTypeKey])
		assert.Equal(t, "0.1", CParams.AutoIndexConfig.SparseIndexParams.GetAsJSONMap()["drop_ratio_build"])

		map2 := map[string]interface{}{
			IndexTypeKey:       "SPARSE_WAND",
			"drop_ratio_build": 0.2,
		}
		jsonStrBytes, err = json.Marshal(map2)
		assert.NoError(t, err)
		bt.Save(CParams.AutoIndexConfig.SparseIndexParams.Key, string(jsonStrBytes))
		assert.Equal(t, "SPARSE_WAND", CParams.AutoIndexConfig.SparseIndexParams.GetAsJSONMap()[IndexTypeKey])
		assert.Equal(t, "0.2", CParams.AutoIndexConfig.SparseIndexParams.GetAsJSONMap()["drop_ratio_build"])
	})

	t.Run("test parseBinaryParams success", func(t *testing.T) {
		// Params := CParams.AutoIndexConfig
		// buildParams := make([string]interface)
		var err error
		map1 := map[string]any{
			IndexTypeKey: "BIN_IVF_FLAT",
			"nlist":      768,
		}
		var jsonStrBytes []byte
		jsonStrBytes, err = json.Marshal(map1)
		assert.NoError(t, err)
		bt.Save(CParams.AutoIndexConfig.BinaryIndexParams.Key, string(jsonStrBytes))
		assert.Equal(t, "BIN_IVF_FLAT", CParams.AutoIndexConfig.BinaryIndexParams.GetAsJSONMap()[IndexTypeKey])
		assert.Equal(t, strconv.Itoa(map1["nlist"].(int)), CParams.AutoIndexConfig.BinaryIndexParams.GetAsJSONMap()["nlist"])

		map2 := map[string]interface{}{
			IndexTypeKey: "BIN_FLAT",
		}
		jsonStrBytes, err = json.Marshal(map2)
		assert.NoError(t, err)
		bt.Save(CParams.AutoIndexConfig.BinaryIndexParams.Key, string(jsonStrBytes))
		assert.Equal(t, "BIN_FLAT", CParams.AutoIndexConfig.BinaryIndexParams.GetAsJSONMap()[IndexTypeKey])
	})

	t.Run("test parsePrepareParams success", func(t *testing.T) {
		var err error
		map1 := map[string]any{
			"key1": 25,
		}
		var jsonStrBytes []byte
		jsonStrBytes, err = json.Marshal(map1)
		assert.NoError(t, err)
		bt.Save(CParams.AutoIndexConfig.IndexParams.Key, string(jsonStrBytes))
		assert.Equal(t, strconv.Itoa(map1["key1"].(int)), CParams.AutoIndexConfig.IndexParams.GetAsJSONMap()["key1"])
	})
}

func Test_autoIndexConfig_panicIfNotValid(t *testing.T) {
	t.Run("not in json format", func(t *testing.T) {
		mgr := config.NewManager()
		mgr.SetConfig("autoIndex.params.build", "not in json format")
		p := &AutoIndexConfig{
			IndexParams: ParamItem{
				Key:       "autoIndex.params.build",
				Formatter: GetBuildParamFormatter(FloatVectorDefaultMetricType, "autoIndex.params.build"),
			},
		}

		assert.Panics(t, func() {
			p.IndexParams.Init(mgr)
		})
	})
}

func TestScalarAutoIndexParams_build(t *testing.T) {
	var CParams ComponentParam
	bt := NewBaseTable(SkipRemote(true))
	CParams.Init(bt)

	t.Run("parse scalar auto index param success", func(t *testing.T) {
		var err error
		map1 := map[string]any{
			"numeric": "STL_SORT",
			"varchar": "TRIE",
			"bool":    "INVERTED",
		}
		var jsonStrBytes []byte
		jsonStrBytes, err = json.Marshal(map1)
		assert.NoError(t, err)
		err = bt.Save(CParams.AutoIndexConfig.ScalarAutoIndexParams.Key, string(jsonStrBytes))
		assert.NoError(t, err)
		assert.Equal(t, "STL_SORT", CParams.AutoIndexConfig.ScalarNumericIndexType.GetValue())
		assert.Equal(t, "TRIE", CParams.AutoIndexConfig.ScalarVarcharIndexType.GetValue())
		assert.Equal(t, "INVERTED", CParams.AutoIndexConfig.ScalarBoolIndexType.GetValue())
	})
}

func TestGetIndexParam_DefaultValue(t *testing.T) {
	paramItem := GetIndexParam()

	t.Run("default value is valid JSON", func(t *testing.T) {
		var params map[string]any
		err := json.Unmarshal([]byte(paramItem.DefaultValue), &params)
		assert.NoError(t, err, "DefaultValue should be valid JSON")
	})

	t.Run("default value contains required fields", func(t *testing.T) {
		var params map[string]any
		err := json.Unmarshal([]byte(paramItem.DefaultValue), &params)
		assert.NoError(t, err)

		assert.Contains(t, params, IndexTypeKey, "DefaultValue should contain index_type")
		assert.Contains(t, params, MetricTypeKey, "DefaultValue should contain metric_type")
	})

	t.Run("default value can be parsed by config", func(t *testing.T) {
		mgr := config.NewManager()
		mgr.SetConfig(paramItem.Key, paramItem.DefaultValue)

		p := &AutoIndexConfig{
			IndexParams: ParamItem{
				Key:       paramItem.Key,
				Formatter: GetBuildParamFormatter(FloatVectorDefaultMetricType, paramItem.Key),
			},
		}

		assert.NotPanics(t, func() {
			p.IndexParams.Init(mgr)
		}, "DefaultValue should be parseable without panic")

		jsonMap := p.IndexParams.GetAsJSONMap()
		assert.NotEmpty(t, jsonMap[IndexTypeKey], "index_type should not be empty")
		assert.NotEmpty(t, jsonMap[MetricTypeKey], "metric_type should not be empty")
	})
}

func TestTwoStageSearchParams(t *testing.T) {
	var CParams ComponentParam
	bt := NewBaseTable(SkipRemote(true))
	CParams.Init(bt)

	t.Run("test default values", func(t *testing.T) {
		// Check default values
		assert.Equal(t, "false", CParams.AutoIndexConfig.TwoStageSearchEnabled.GetValue())
		assert.Equal(t, "2000", CParams.AutoIndexConfig.TwoStageSearchMinTopk.GetValue())
		assert.Equal(t, "5", CParams.AutoIndexConfig.TwoStageSearchMinNumSegments.GetValue())
	})

	t.Run("test enable two-stage search", func(t *testing.T) {
		err := bt.Save(CParams.AutoIndexConfig.TwoStageSearchEnabled.Key, "true")
		assert.NoError(t, err)
		assert.True(t, CParams.AutoIndexConfig.TwoStageSearchEnabled.GetAsBool())

		err = bt.Save(CParams.AutoIndexConfig.TwoStageSearchEnabled.Key, "false")
		assert.NoError(t, err)
		assert.False(t, CParams.AutoIndexConfig.TwoStageSearchEnabled.GetAsBool())
	})

	t.Run("test min topk configuration", func(t *testing.T) {
		err := bt.Save(CParams.AutoIndexConfig.TwoStageSearchMinTopk.Key, "1000")
		assert.NoError(t, err)
		assert.Equal(t, int64(1000), CParams.AutoIndexConfig.TwoStageSearchMinTopk.GetAsInt64())

		err = bt.Save(CParams.AutoIndexConfig.TwoStageSearchMinTopk.Key, "5000")
		assert.NoError(t, err)
		assert.Equal(t, int64(5000), CParams.AutoIndexConfig.TwoStageSearchMinTopk.GetAsInt64())
	})

	t.Run("test min num segments configuration", func(t *testing.T) {
		err := bt.Save(CParams.AutoIndexConfig.TwoStageSearchMinNumSegments.Key, "3")
		assert.NoError(t, err)
		assert.Equal(t, 3, CParams.AutoIndexConfig.TwoStageSearchMinNumSegments.GetAsInt())

		err = bt.Save(CParams.AutoIndexConfig.TwoStageSearchMinNumSegments.Key, "10")
		assert.NoError(t, err)
		assert.Equal(t, 10, CParams.AutoIndexConfig.TwoStageSearchMinNumSegments.GetAsInt())
	})
}
