document.addEventListener('DOMContentLoaded', function(){
    const list = [];

    const form = document.querySelector('.shopping-form');
    const itemInput = document.querySelector('shopping-form-item-input');
    const quantityInput = document.querySelector('.shopping-form-quantity-input');
    const incrementButton = document.querySelector('.shopping-form-increment-button');
    const decrementButton = document.querySelector('.shopping-form-decrement-button');

    const items = document.querySelector('.shopping-items');

    incrementButton.addEventListener("click", incrementQuantity);
    decrementButton.addEventListener("click", decrementQuantity);

    form.addEventListener('submit', addItemToList)

    // BOTOES DE + e -
    function incrementQuantity() {
        const currentValue = Number(quantityInput.value);
        const newValue = currentValue + 1;

        quantityInput.value = newValue;
    }

    function decrementQuantity() {
        const currentValue = Number(quantityInput.value);
        const newValue = currentValue - 1;

        if(newValue > 0){
            quantityInput.value = newValue;
        }
    }

    // SUBMIT FUNCTION

    function addItemToList(event) {
        event.preventDefault();

        const itemName = event.target["item-name"].value;
        const itemQuantity = event.target["item-quantity"].value;

        if(itemName !== ""){
            const item = {
                name: itemName,
                quantity: itemQuantity,
            };
    
            list.push(item);
    
            renderListItems();
            resetInputs();
        }
    }

    // RENDER LIST
    function renderListItems() {
        let itemsStructure = "";

        list.forEach(function(item){
            itemsStructure += `
                <li class="shopping-item">
                    <span>${item.name}</span>
                    <span>${item.quantity}</span>
                </li>
                `;
        });

        items.innerHTML = itemsStructure;
    }

    // Resetar inputs
    function resetInputs() {
        console.log(itemInput)
        //itemInput.value = "";
        //quantityInput.value = 1;
    }

        
});