package productDescriptionRepo

import (
	"errors"
	"fmt"

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

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
}

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.Get().
		Model(dbmodel.PsProductLang{}).
		Where(&dbmodel.PsProductLang{
			IDProduct: int32(productID),
			IDShop:    int32(constdata.SHOP_ID),
			IDLang:    int32(productid_lang),
		}).
		Select(`
			`+dbmodel.PsProductLangCols.IDProduct.TabCol()+` AS id_product,
			`+dbmodel.PsProductLangCols.IDShop.TabCol()+` AS id_shop,
			`+dbmodel.PsProductLangCols.IDLang.TabCol()+` AS id_lang,
			`+dbmodel.PsProductLangCols.Description.TabCol()+` AS description,
			`+dbmodel.PsProductLangCols.DescriptionShort.TabCol()+` AS description_short,
			`+dbmodel.PsProductLangCols.LinkRewrite.TabCol()+` AS link_rewrite,
			`+dbmodel.PsProductLangCols.MetaDescription.TabCol()+` AS meta_description,
			`+dbmodel.PsProductLangCols.MetaKeywords.TabCol()+` AS meta_keywords,
			`+dbmodel.PsProductLangCols.MetaTitle.TabCol()+` AS meta_title,
			`+dbmodel.PsProductLangCols.Name.TabCol()+` AS name,
			`+dbmodel.PsProductLangCols.AvailableNow.TabCol()+` AS available_now,
			`+dbmodel.PsProductLangCols.AvailableLater.TabCol()+` AS available_later,
			`+dbmodel.PsProductLangCols.DeliveryInStock.TabCol()+` AS delivery_in_stock,
			`+dbmodel.PsProductLangCols.DeliveryOutStock.TabCol()+` AS delivery_out_stock,
			`+dbmodel.PsProductLangCols.Usage.TabCol()+` AS `+"`usage`"+`,
			CONCAT(?, '/', `+dbmodel.PsImageShopCols.IDImage.TabCol()+`, '-large_default/', `+dbmodel.PsProductLangCols.LinkRewrite.TabCol()+`, '.webp') AS image_link
		`, config.Get().Image.ImagePrefix).
		Joins("JOIN " + dbmodel.TableNamePsImageShop +
			" ON " + dbmodel.PsImageShopCols.IDProduct.TabCol() + "=" + dbmodel.PsProductLangCols.IDProduct.TabCol() +
			" AND " + dbmodel.PsImageShopCols.Cover.TabCol() + " = 1").
		First(&ProductDescription).Error

	if errors.Is(err, gorm.ErrRecordNotFound) {
		// handle "not found" case only
		ProductDescription.ExistsInDatabase = false
	} else if err != nil {
		return nil, fmt.Errorf("database error: %w", err)
	} else {
		ProductDescription.ExistsInDatabase = true
	}

	return &ProductDescription, nil
}

// If it doesn't exist, returns an error.
func (r *ProductDescriptionRepo) CreateIfDoesNotExist(productID uint, productid_lang uint) error {
	record := dbmodel.PsProductLang{
		IDProduct: int32(productID),
		IDShop:    int32(constdata.SHOP_ID),
		IDLang:    int32(productid_lang),
	}

	err := db.Get().
		Model(dbmodel.PsProductLang{}).
		Where(&dbmodel.PsProductLang{
			IDProduct: int32(productID),
			IDShop:    int32(constdata.SHOP_ID),
			IDLang:    int32(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.Get().
		Model(&dbmodel.PsProductLang{}).
		Where(&dbmodel.PsProductLang{
			IDProduct: int32(productID),
			IDShop:    int32(constdata.SHOP_ID),
			IDLang:    int32(productid_lang),
		}).
		Updates(updatesIface).Error
	if err != nil {
		return fmt.Errorf("database error: %w", err)
	}

	return nil
}