package eta_bridge

import (
	"context"
	"encoding/json"
	"eta_gn/eta_task/models"
	"eta_gn/eta_task/utils"
	"fmt"
	"html"
	"strconv"
	"strings"

	"github.com/PuerkitoBio/goquery"
	"github.com/olivere/elastic/v7"
)

func NewClient() (client *elastic.Client, err error) {
	client, err = elastic.NewClient(
		elastic.SetURL(utils.ES_URL),
		elastic.SetBasicAuth(utils.ES_USERNAME, utils.ES_PASSWORD),
		elastic.SetSniff(false))

	return
}

// EsAddOrEditKnowledgeResource 新增/修改es中的知识资源数据
func EsAddOrEditKnowledgeResource(item *models.KnowledgeResource) (err error) {
	defer func() {
		if err != nil {
			fmt.Println("EsAddOrEditData Err:", err.Error())
			utils.FileLog.Info("EsAddOrEditKnowledgeResource err:", err)
		}
	}()
	client, err := NewClient()
	if err != nil {
		return
	}
	indexName := utils.EsKnowledgeResourceIndexName
	if item.IsFile == 0 {
		content := ExtractTextFromResourceContent(item.Content)
		contentRunes := []rune(content)
		if len(contentRunes) > 60 {
			item.Content = string(contentRunes[:60])
		} else {
			item.Content = content
		}
	}
	request := client.Index().Index(indexName).Id(strconv.Itoa(item.KnowledgeResourceId)).BodyJson(item)
	response, err := request.Do(context.Background())
	if err != nil {
		jsonBytes, _ := json.Marshal(item)
		utils.FileLog.Info("add json:%s,EsAddOrEditKnowledgeResource err:%s", string(jsonBytes), err.Error())
		return
	}
	if response.Status == 0 {
		err = nil
	} else {
		fmt.Println("EsAddOrEditKnowledgeResource:", response.Status, response.Result)
	}
	return
}

func ExtractTextFromResourceContent(content string) (text string) {
	content = html.UnescapeString(content)
	doc, err := goquery.NewDocumentFromReader(strings.NewReader(content))
	if err != nil {
		return
	}
	text = doc.Text()
	text = strings.ReplaceAll(text, "\n", "")
	return
}

// UpdateEsKnowledgeResource updates a document in the Elasticsearch knowledge resource index.
//
// Parameters:
//   - docId: The ID of the document to update.
//   - docFields: A map containing the fields to update in the document.
//
// Returns:
//   - err: An error object if an error occurred, otherwise nil.
func UpdateEsKnowledgeResource(docId int, docFields map[string]interface{}) (err error) {
	defer func() {
		if err != nil {
			fmt.Println("EsAddOrEditData Err:", err.Error())
			utils.FileLog.Info("EsAddOrEditKnowledgeResource err:", err)
		}
	}()
	client, err := NewClient()
	if err != nil {
		return
	}
	indexName := utils.EsKnowledgeResourceIndexName
	res, err := client.Update().
		Index(indexName).
		Id(strconv.Itoa(docId)).
		Doc(docFields).
		Do(context.Background())
	if err != nil {
		utils.FileLog.Info("update docId:%d,UpdateEsKnowledgeResource err:%s", docId, err.Error())
		return
	}
	if res.Result == "updated" {
		err = nil
	} else {
		fmt.Println("UpdateEsKnowledgeResource:", res.Result)
	}
	return
}

func EsBatchAddOrEditKnowledgeResource(list []*models.KnowledgeResource) (err error) {
	if len(list) == 0 {
		return
	}
	defer func() {
		if err != nil {
			fmt.Println("EsBatchAddOrEditData Err:", err.Error())
			utils.FileLog.Info("EsBatchAddOrEditKnowledgeResource err:", err)
		}
	}()
	indexName := utils.EsKnowledgeResourceIndexName
	client, err := NewClient()
	if err != nil {
		return
	}

	actions := make([]elastic.BulkableRequest, len(list))
	for i, item := range list {
		request := elastic.NewBulkIndexRequest().Index(indexName).Id(strconv.Itoa(item.KnowledgeResourceId)).Doc(item)
		actions[i] = request
	}
	response, err := client.Bulk().Add(actions...).Do(context.Background())
	if err != nil {
		jsonBytes, _ := json.Marshal(list)
		fmt.Println("add json:", string(jsonBytes))
		fmt.Println("EsBatchAddOrEditKnowledgeResource err:", err)
		return
	}
	if response.Errors {
		err = fmt.Errorf("add knowledge resource to es failed, response result is %+v", response.Items)
		fmt.Println("EsBatchAddOrEditKnowledgeResource:", response.Errors)
	} else {
		fmt.Printf("EsBatchAddOrEditKnowledgeResource:%+v\n", response)
	}
	return
}