package meiliService

import (
	"fmt"
	"regexp"
	"strings"
	"time"

	"git.ma-al.com/goc_daniel/b2b/app/config"
	"git.ma-al.com/goc_daniel/b2b/app/repos/productDescriptionRepo"
	constdata "git.ma-al.com/goc_daniel/b2b/app/utils/const_data"
	"github.com/meilisearch/meilisearch-go"
)

type MeiliService struct {
	productDescriptionRepo productDescriptionRepo.UIProductDescriptionRepo
	meiliClient            meilisearch.ServiceManager
}

func New() *MeiliService {

	client := meilisearch.New(
		config.Get().MailiSearch.ServerURL,
		meilisearch.WithAPIKey(config.Get().MailiSearch.ApiKey),
	)

	return &MeiliService{
		meiliClient:            client,
		productDescriptionRepo: productDescriptionRepo.New(),
	}
}

func getIndexName(id_lang uint) string {
	return fmt.Sprintf("shop_%d_lang_%d", constdata.SHOP_ID, id_lang)
}

// ====================================   FOR TESTING ONLY   ====================================
func (s *MeiliService) CreateIndex(id_lang uint) error {
	indexName := getIndexName(id_lang)

	products, err := s.productDescriptionRepo.GetMeiliProducts(id_lang)
	if err != nil {
		return fmt.Errorf("failed to get products: %w", err)
	}

	if len(products) == 0 {
		return nil
	}

	// Process products: prepare for indexing
	for i := range products {
		// Convert JSON fields to searchable strings
		if len(products[i].Features) > 0 {
			products[i].FeaturesStr = string(products[i].Features)
		}
		if len(products[i].Attributes) > 0 {
			products[i].AttributesStr = string(products[i].Attributes)
		}
		if len(products[i].AttributeFilters) > 0 {
			products[i].AttributeFiltersStr = string(products[i].AttributeFilters)
		}

		// Build cover image URL from image ID
		if products[i].IDImage > 0 {
			products[i].CoverImage = config.Get().Image.ImagePrefix + fmt.Sprintf("/%d", products[i].IDImage)
		}
	}

	// Add documents to index
	primaryKey := "product_id"
	docOptions := &meilisearch.DocumentOptions{
		PrimaryKey:   &primaryKey,
		SkipCreation: false,
	}

	task, err := s.meiliClient.Index(indexName).AddDocuments(products, docOptions)
	if err != nil {
		return fmt.Errorf("failed to add documents: %w", err)
	}

	finishedTask, err := s.meiliClient.WaitForTask(task.TaskUID, 1000*time.Millisecond)
	if err != nil {
		return fmt.Errorf("failed to wait for task: %w", err)
	}
	if finishedTask.Status == "failed" {
		return fmt.Errorf("task failed: %v", finishedTask.Error)
	}

	// Configure filterable attributes
	filterableAttributes := []interface{}{
		"product_id",
		"category_id",
		"category_ids",
		"active",
		"attribute_filters",
		"features",
	}
	task, err = s.meiliClient.Index(indexName).UpdateFilterableAttributes(&filterableAttributes)
	if err != nil {
		return fmt.Errorf("failed to update filterable attributes: %w", err)
	}
	_, err = s.meiliClient.WaitForTask(task.TaskUID, 500*time.Millisecond)
	if err != nil {
		return fmt.Errorf("failed to wait for filterable task: %w", err)
	}

	// Configure sortable attributes
	sortableAttributes := []string{
		"price",
		"name",
		"product_id",
		"category_ids",
	}
	task, err = s.meiliClient.Index(indexName).UpdateSortableAttributes(&sortableAttributes)
	if err != nil {
		return fmt.Errorf("failed to update sortable attributes: %w", err)
	}
	_, err = s.meiliClient.WaitForTask(task.TaskUID, 500*time.Millisecond)
	if err != nil {
		return fmt.Errorf("failed to wait for sortable task: %w", err)
	}

	// Configure displayed attributes
	displayedAttributes := []string{
		"product_id",
		"name",
		"ean13",
		"reference",
		"variations",
		"id_image",
		"price",
		"category_name",
		"category_ids",
		"attribute_filters",
	}
	task, err = s.meiliClient.Index(indexName).UpdateDisplayedAttributes(&displayedAttributes)
	if err != nil {
		return fmt.Errorf("failed to update displayed attributes: %w", err)
	}
	_, err = s.meiliClient.WaitForTask(task.TaskUID, 500*time.Millisecond)
	if err != nil {
		return fmt.Errorf("failed to wait for displayed task: %w", err)
	}

	// Configure searchable attributes
	searchableAttributes := []string{
		"name",
		"description",
		"description_short",
		"usage",
		"features_str",
		"attributes_str",
		"reference",
		"ean13",
		"category_name",
	}
	task, err = s.meiliClient.Index(indexName).UpdateSearchableAttributes(&searchableAttributes)
	if err != nil {
		return fmt.Errorf("failed to update searchable attributes: %w", err)
	}
	_, err = s.meiliClient.WaitForTask(task.TaskUID, 500*time.Millisecond)
	if err != nil {
		return fmt.Errorf("failed to wait for searchable task: %w", err)
	}

	return nil
}

// ====================================   FOR TESTING ONLY   ====================================
func (s *MeiliService) Test(id_lang uint) (meilisearch.SearchResponse, error) {
	indexName := getIndexName(id_lang)

	searchReq := &meilisearch.SearchRequest{
		Limit: 4,
		Facets: []string{
			"CategoryID",
		},
	}

	// Perform search
	results, err := s.meiliClient.Index(indexName).Search("mat", searchReq)
	if err != nil {
		fmt.Printf("Meilisearch error: %v\n", err)
		return meilisearch.SearchResponse{}, err
	}

	fmt.Printf("Search results for query 'mat' in %s: %d hits\n", indexName, len(results.Hits))

	return *results, nil
}

// Search performs a full-text search on the specified index
func (s *MeiliService) Search(id_lang uint, query string, id_category uint) (meilisearch.SearchResponse, error) {
	indexName := getIndexName(id_lang)

	filter_query := "Active = 1"
	if id_category != 0 {
		// Use CategoryIDs to include products from child categories
		filter_query += fmt.Sprintf(" AND CategoryIDs = %d", id_category)
	}

	searchReq := &meilisearch.SearchRequest{
		Limit: 30,
		Facets: []string{
			"CategoryID",
		},
		Filter: filter_query,
	}

	results, err := s.meiliClient.Index(indexName).Search(query, searchReq)
	if err != nil {
		fmt.Printf("Meilisearch search error: %v\n", err)
		return meilisearch.SearchResponse{}, err
	}

	return *results, nil
}

// HealthCheck checks if Meilisearch is healthy and accessible
func (s *MeiliService) HealthCheck() (*meilisearch.Health, error) {
	health, err := s.meiliClient.Health()
	if err != nil {
		return nil, fmt.Errorf("meilisearch health check failed: %w", err)
	}

	return health, nil
}

// GetIndexSettings retrieves the current settings for a specific index
func (s *MeiliService) GetIndexSettings(id_lang uint) (map[string]interface{}, error) {
	indexName := getIndexName(id_lang)

	index := s.meiliClient.Index(indexName)

	result := make(map[string]interface{})

	// Get searchable attributes
	searchable, err := index.GetSearchableAttributes()
	if err == nil {
		result["searchableAttributes"] = searchable
	}

	// Get filterable attributes
	filterable, err := index.GetFilterableAttributes()
	if err == nil {
		result["filterableAttributes"] = filterable
	}

	// Get displayed attributes
	displayed, err := index.GetDisplayedAttributes()
	if err == nil {
		result["displayedAttributes"] = displayed
	}

	// Get ranking rules
	ranking, err := index.GetRankingRules()
	if err == nil {
		result["rankingRules"] = ranking
	}

	// Get distinct attribute
	distinct, err := index.GetDistinctAttribute()
	if err == nil && distinct != nil {
		result["distinctAttribute"] = *distinct
	}

	// Get typo tolerance
	typo, err := index.GetTypoTolerance()
	if err == nil {
		result["typoTolerance"] = typo
	}

	return result, nil
}

// remove all tags from HTML text
func cleanHTML(s string) string {
	// Simple regex to remove all HTML tags
	re := regexp.MustCompile(`<[^>]*>`)
	result := re.ReplaceAllString(s, "")
	// Replace multiple spaces with single space
	result = regexp.MustCompile(`\s+`).ReplaceAllString(result, " ")
	return strings.TrimSpace(result)
}