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, productid_lang uint) (*model.ProductDescription, error)
	CreateIfDoesNotExist(productID uint, productid_lang uint) error
	UpdateFields(productID uint, productid_lang 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, productid_lang 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, productid_lang).
		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, productid_lang uint) error {
	record := model.ProductDescription{
		ProductID: productID,
		ShopID:    constdata.SHOP_ID,
		LangID:    productid_lang,
	}

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

	return nil
}

func (r *ProductDescriptionRepo) UpdateFields(productID uint, productid_lang 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, productid_lang).
		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

	query := db.Get().Debug().Raw(`
		WITH products_page AS (
			SELECT ps.id_product, ps.price
			FROM ps_product_shop ps 
			WHERE ps.id_shop = ? AND ps.active = 1
		),
		variation_attributes AS (
			SELECT pas.id_product, pagl.public_name AS attribute_name,
				JSON_ARRAYAGG(DISTINCT pal.name) AS attribute_values
			FROM ps_product_attribute_shop pas
			JOIN ps_product_attribute_combination ppac 
				ON ppac.id_product_attribute = pas.id_product_attribute
			JOIN ps_attribute_lang pal 
				ON pal.id_attribute = ppac.id_attribute AND pal.id_lang = ?
			JOIN ps_attribute pa 
				ON pa.id_attribute = ppac.id_attribute
			JOIN ps_attribute_group pag 
				ON pag.id_attribute_group = pa.id_attribute_group
			JOIN ps_attribute_group_lang pagl 
				ON pagl.id_attribute_group = pag.id_attribute_group AND pagl.id_lang = ?
			WHERE pas.id_shop = ?
			GROUP BY pas.id_product, pagl.public_name
		),
		variations AS (
			SELECT id_product, JSON_OBJECTAGG(attribute_name, attribute_values) AS attributes
			FROM variation_attributes
			GROUP BY id_product
		),
		variation_attribute_filters AS (
			SELECT pas.id_product,
				JSON_ARRAYAGG(
					DISTINCT CONCAT(
						LOWER(REPLACE(CAST(pagl.public_name AS CHAR) COLLATE utf8mb4_unicode_ci, ' ', '_')),
						':',
						LOWER(REPLACE(CAST(pal.name AS CHAR) COLLATE utf8mb4_unicode_ci, ' ', '_'))
					)
				) AS attribute_filters
			FROM ps_product_attribute_shop pas
			JOIN ps_product_attribute_combination ppac 
				ON ppac.id_product_attribute = pas.id_product_attribute
			JOIN ps_attribute_lang pal 
				ON pal.id_attribute = ppac.id_attribute AND pal.id_lang = ?
			JOIN ps_attribute pa 
				ON pa.id_attribute = ppac.id_attribute
			JOIN ps_attribute_group pag 
				ON pag.id_attribute_group = pa.id_attribute_group
			JOIN ps_attribute_group_lang pagl 
				ON pagl.id_attribute_group = pag.id_attribute_group AND pagl.id_lang = ?
			WHERE pas.id_shop = ?
			GROUP BY pas.id_product
		),
		features AS (
			SELECT pfp.id_product, JSON_OBJECTAGG(pfl.name, pfvl.value) AS features
			FROM ps_feature_product pfp
			JOIN ps_feature_lang pfl 
				ON pfl.id_feature = pfp.id_feature AND pfl.id_lang = ?
			JOIN ps_feature_value_lang pfvl 
				ON pfvl.id_feature_value = pfp.id_feature_value AND pfvl.id_lang = ?
			GROUP BY pfp.id_product
		),
		images AS (
			SELECT id_product, id_image
			FROM ps_image_shop
			WHERE id_shop = ? AND cover = 1
		),
		categories AS (
			SELECT id_product, JSON_ARRAYAGG(id_category) AS category_ids
			FROM ps_category_product
			GROUP BY id_product
		)
		SELECT pp.id_product,
			pl.name,
			TRIM(REGEXP_REPLACE(REGEXP_REPLACE(pl.description, '<[^>]*>', ' '), '[[:space:]]+', ' ')) AS description,
			TRIM(REGEXP_REPLACE(REGEXP_REPLACE(pl.description_short, '<[^>]*>', ' '), '[[:space:]]+', ' ')) AS description_short,
			TRIM(REGEXP_REPLACE(REGEXP_REPLACE(pl.usage, '<[^>]*>', ' '), '[[:space:]]+', ' ')) AS used_for,
			p.ean13,
			p.reference,
			pp.price,
			ps.id_category_default AS id_category,
			cl.name AS category_name,
			cl.link_rewrite,
			COALESCE(vary.attributes, JSON_OBJECT()) AS attributes,
			COALESCE(vaf.attribute_filters, JSON_ARRAY()) AS attribute_filters,
			COALESCE(feat.features, JSON_OBJECT()) AS features,
			img.id_image,
			cat.category_ids,
			(SELECT COUNT(*) FROM ps_product_attribute_shop pas2 WHERE pas2.id_product = pp.id_product AND pas2.id_shop = ?) AS variations
		FROM products_page pp
		JOIN ps_product_shop ps ON ps.id_product = pp.id_product
		JOIN ps_product_lang pl 
			ON pl.id_product = ps.id_product AND pl.id_shop = ? AND pl.id_lang = ?
		JOIN ps_product p ON p.id_product = ps.id_product
		JOIN ps_category_lang cl 
			ON cl.id_category = ps.id_category_default AND cl.id_shop = ? AND cl.id_lang = ?
		LEFT JOIN variations vary ON vary.id_product = ps.id_product
		LEFT JOIN variation_attribute_filters vaf ON vaf.id_product = ps.id_product
		LEFT JOIN features feat ON feat.id_product = ps.id_product
		LEFT JOIN images img ON img.id_product = ps.id_product
		LEFT JOIN categories cat ON cat.id_product = ps.id_product
		ORDER BY ps.id_product
	`,
		constdata.SHOP_ID, // products_page
		id_lang, id_lang,  // variation_attributes pal.id_lang, pagl.id_lang
		constdata.SHOP_ID, // variation_attributes pas.id_shop
		id_lang, id_lang,  // variation_attribute_filters pal.id_lang, pagl.id_lang
		constdata.SHOP_ID, // variation_attribute_filters pas.id_shop
		id_lang, id_lang,  // features pfl.id_lang, pfvl.id_lang
		constdata.SHOP_ID, // images id_shop
		constdata.SHOP_ID, // variation count subquery
		constdata.SHOP_ID, // ps_product_lang pl.id_shop
		id_lang,           // ps_product_lang pl.id_lang
		constdata.SHOP_ID, // ps_category_lang cl.id_shop
		id_lang,           // ps_category_lang cl.id_lang
	)
	if err := query.Scan(&products).Error; err != nil {
		return products, fmt.Errorf("database error: %w", err)
	}

	return products, nil
}