if(coupons.length) {
    let wrWithDiscount = coupons.map(c => {

        let discount

        if(c.discount_percentage) {
            discount = (wr.price - (wr.price * c.discount_percentage / 100))
        }

        if(c.discount_price) {
            discount = (wr.price - c.discount_price)
        }

        return {
            coupon_id: c.id,
            discount: discount
        }
    })

    let smallest = wrWithDiscount.reduce((a, b) => (a.discount > b.discount) ? a : b)
    wr.price = smallest.discount.toFixed(2)
}