package productDescriptionRepo

import (
	"fmt"

	"git.ma-al.com/goc_daniel/b2b/app/db"
	"git.ma-al.com/goc_daniel/b2b/app/model"
	constdata "git.ma-al.com/goc_daniel/b2b/app/utils/const_data"
)

type UIProductDescriptionRepo interface {
	GetProductDescription(productID uint, productLangID uint) (*model.ProductDescription, error)
	CreateIfDoesNotExist(productID uint, productLangID uint) error
	UpdateFields(productID uint, productLangID uint, updates map[string]string) error
	GetMeiliProducts(id_lang uint) ([]model.MeiliSearchProduct, error)
}

type ProductDescriptionRepo struct{}

func New() UIProductDescriptionRepo {
	return &ProductDescriptionRepo{}
}

// We assume that any user has access to all product descriptions
func (r *ProductDescriptionRepo) GetProductDescription(productID uint, productLangID uint) (*model.ProductDescription, error) {
	var ProductDescription model.ProductDescription

	err := db.DB.
		Table("ps_product_lang").
		Where("id_product = ? AND id_shop = ? AND id_lang = ?", productID, constdata.SHOP_ID, productLangID).
		First(&ProductDescription).Error
	if err != nil {
		return nil, fmt.Errorf("database error: %w", err)
	}

	return &ProductDescription, nil
}

// If it doesn't exist, returns an error.
func (r *ProductDescriptionRepo) CreateIfDoesNotExist(productID uint, productLangID uint) error {
	record := model.ProductDescription{
		ProductID: productID,
		ShopID:    constdata.SHOP_ID,
		LangID:    productLangID,
	}

	err := db.DB.
		Table("ps_product_lang").
		Where("id_product = ? AND id_shop = ? AND id_lang = ?", productID, constdata.SHOP_ID, productLangID).
		FirstOrCreate(&record).Error
	if err != nil {
		return fmt.Errorf("database error: %w", err)
	}

	return nil
}

func (r *ProductDescriptionRepo) UpdateFields(productID uint, productLangID uint, updates map[string]string) error {
	if len(updates) == 0 {
		return nil
	}
	updatesIface := make(map[string]interface{}, len(updates))
	for k, v := range updates {
		updatesIface[k] = v
	}

	err := db.DB.
		Table("ps_product_lang").
		Where("id_product = ? AND id_shop = ? AND id_lang = ?", productID, constdata.SHOP_ID, productLangID).
		Updates(updatesIface).Error
	if err != nil {
		return fmt.Errorf("database error: %w", err)
	}

	return nil
}

// We assume that any user has access to all product descriptions
func (r *ProductDescriptionRepo) GetMeiliProducts(id_lang uint) ([]model.MeiliSearchProduct, error) {
	var products []model.MeiliSearchProduct

	err := db.DB.Debug().
		// Select(`
		// 	ps.id_product AS id_product,
		// 	pl.name AS name,
		// 	ps.price AS price,
		// 	pl.description AS description,
		// 	pl.description_short AS description_short,
		// 	pl.usage AS used_for,
		// 	p.ean13 AS ean13,
		// 	p.reference AS reference,
		// 	p.width AS width,
		// 	p.height AS height,
		// 	p.depth AS depth,
		// 	p.weight AS weight,
		// 	ps.id_category_default AS id_category,
		// 	cl.name AS category_name,
		// 	COUNT(DISTINCT pas.id_product_attribute) AS variations
		// `).
		// Table("ps_product_shop AS ps").
		// Joins("LEFT JOIN ps_product_lang AS pl ON ps.id_product = pl.id_product AND pl.id_shop = ? AND pl.id_lang = ?", constdata.SHOP_ID, id_lang).
		// Joins("LEFT JOIN ps_product AS p ON p.id_product = ps.id_product").
		// Joins("LEFT JOIN ps_category_lang AS cl ON cl.id_category = ps.id_category_default AND cl.id_shop = ? AND cl.id_lang = ?", constdata.SHOP_ID, id_lang).
		// Joins("LEFT JOIN ps_product_attribute_shop AS pas ON pas.id_product = ps.id_product AND pas.id_shop = ?", constdata.SHOP_ID).
		// Where("ps.id_shop = ? AND ps.active = 1", constdata.SHOP_ID).
		// Group("ps.id_product").

		Select(`
			ps.id_product AS id_product,
			pl.name AS name,
			pl.description AS description,
			pl.description_short AS description_short,
			pl.usage AS used_for,
			p.ean13 AS ean13,
			p.reference AS reference,
			ps.id_category_default AS id_category,
			cl.name AS category_name,
			cl.link_rewrite as link_rewrite,
			COUNT(DISTINCT pas.id_product_attribute) AS variations,
			pis.id_image AS id_image,
			GROUP_CONCAT(DISTINCT pcp.id_category) AS category_ids
		`).
		Table("ps_product_shop AS ps").
		Joins("LEFT JOIN ps_product_lang AS pl ON ps.id_product = pl.id_product AND pl.id_shop = ? AND pl.id_lang = ?", constdata.SHOP_ID, id_lang).
		Joins("LEFT JOIN ps_product AS p ON p.id_product = ps.id_product").
		Joins("LEFT JOIN ps_category_lang AS cl ON cl.id_category = ps.id_category_default AND cl.id_shop = ? AND cl.id_lang = ?", constdata.SHOP_ID, id_lang).
		Joins("LEFT JOIN ps_product_attribute_shop AS pas ON pas.id_product = ps.id_product AND pas.id_shop = ?", constdata.SHOP_ID).
		Joins("JOIN ps_image_shop AS pis ON pis.id_product = ps.id_product AND pis.cover = 1").
		Joins("JOIN ps_category_product AS pcp ON pcp.id_product = ps.id_product").
		Where("ps.id_shop = ? AND ps.active = 1", constdata.SHOP_ID).
		Group("pcp.id_product, ps.id_product").
		Scan(&products).Error
	if err != nil {
		return products, fmt.Errorf("database error: %w", err)
	}

	// Get all category IDs for each product (including child categories)
	for i := range products {
		var categoryIDs []uint
		// Find all parent categories and their children using nested set
		err := db.DB.
			Table("ps_category AS c").
			Select("c.id_category").
			Joins("JOIN ps_category_product AS cp ON cp.id_category = c.id_category").
			Joins("JOIN ps_category AS parent ON c.nleft >= parent.nleft AND c.nright <= parent.nright AND parent.id_category = ?", products[i].CategoryID).
			Where("cp.id_product = ?", products[i].ProductID).
			Group("c.id_category").
			Pluck("c.id_category", &categoryIDs).Error
		if err != nil {
			continue // Skip if error, use default category
		}
		if len(categoryIDs) > 0 {
			products[i].CategoryIDs = categoryIDs
		} else {
			products[i].CategoryIDs = []uint{products[i].CategoryID}
		}

		// Get cover image for the product
		var imageID int
		err = db.DB.
			Table("ps_image AS i").
			Select("i.id_image").
			Joins("LEFT JOIN ps_image_shop AS iss ON iss.id_image = i.id_image AND iss.id_shop = ?", constdata.SHOP_ID).
			Where("i.id_product = ? AND (i.cover = 1 OR i.cover IS TRUE)", products[i].ProductID).
			Order("i.position ASC").
			Limit(1).
			Pluck("i.id_image", &imageID).Error
		if err == nil && imageID > 0 {
			products[i].CoverImage = fmt.Sprintf("%d/%d.jpg", products[i].ProductID, imageID)
		}
	}

	return products, nil
}