package storage

import (
	"context"
	"relynolli-server/internal"
)

type StorageOrder interface {
	GetTotal(ctx context.Context, fuserId int64) (*TotalQuery, error)
}

func NewStorageOrder() StorageOrder {
	if instance == nil {
		instance = &storage{
			db:  internal.InitDatabase().GetInstance(),
			rdb: internal.InitRedis(),
		}
	}
	return instance
}

type TotalQuery struct {
	Total float64 `bun:"total" json:"total"`
}

func (s *storage) GetTotal(ctx context.Context, fuserId int64) (*TotalQuery, error) {
	model := new(TotalQuery)
	stmt := `select sum(price.PRICE * cart.quantity) as total from api_cart cart left join b_catalog_price price on cart.product_id = price.PRODUCT_ID and cart.price_type_id = price.CATALOG_GROUP_ID where fuser_id = ?`
	err := s.db.NewRaw(stmt, fuserId).Scan(ctx, model)
	if err != nil {
		return nil, err
	}
	return model, nil
}