scripts.js

const Modal = {
    open(){
        document
        .querySelector('.modal-overlay')
        .classList.
        add('active')
    },
    close(){
        document
        .querySelector('.modal-overlay')
        .classList
        .remove('active')
    }
}

const Storage = {
    get(){
        return JSON.parse(localStorage.getItem("dev.finances:transactions")) || []
    },
    set(transactions){
        localStorage.setItem("dev.finances:transactions", JSON.stringify(transactions))
    }
} 

const Transaction = {
    all: Storage.get(),

    add(transaction){
        Transaction.all.push(transaction)

        App.reload()
    },

    remove(index){
        Transaction.all.splice(index,1)

        App.reload()
    },


    incomes() {
        let income = 0;
        Transaction.all.forEach(transaction=> {
            if (transaction.amount > 0 ) {
                income += transaction.amount;
            }
        })
        return income;
    },
    expenses(){
        let expense = 0;
        Transaction.all.forEach(transaction =>{
            if (transaction.amount < 0){
                expense += transaction.amount;
            }
        })
        return expense;
    },
    total(){
        return Transaction.incomes() + Transaction.expenses();
    },
}

const DOM = { 
    transactionsContainer: document.querySelector('#data-table tbody'),

    addTransaction(transaction, index) {
        const tr = document.createElement('tr')
        tr.innerHTML = DOM.innerHTMLTransaction(transaction,index)
        tr.dataset.index = index

        DOM.transactionsContainer.appendChild(tr)
    },

    innerHTMLTransaction(transaction, index) {
        const CSSclass = transaction.amount > 0 ? "income" : "expense"

        const amount = Utils.formatCurrency(transaction.amount)

        const html = ` 
        <td class="description">${transaction.description}</td>
        <td class="${CSSclass}">${amount}</td>
        <td class="date">${transaction.date}</td>
        <td>
            <img onclick="Transaction.remove(${index})" src="./assets/minus.svg" alt="remover trasação">
        </td>
        `
        return html

    },

    updateBalance(){
        document 
            .getElementById('incomeDisplay')
            .innerHTML = Utils.formatCurrency(Transaction.incomes())
        document 
            .getElementById('expenseDisplay')
            .innerHTML = Utils.formatCurrency(Transaction.expenses())
        document 
            .getElementById('totalDisplay')
            .innerHTML = Utils.formatCurrency(Transaction.total())
    },

    clearTransaction(){
        DOM.transactionsContainer.innerHTML = ""
    }

}

const Utils = {
    formatAmount(value){
        value = Number(value.replace(/\,\./g,"")) * 100

        return value
    },
    formatDate(date){
        const splittedDate = date.split("-")

        return `${splittedDate[2]}/${splittedDate[1]}/${splittedDate[0]}`
    },
    formatCurrency(value) {
        const signal = Number(value) < 0 ? "-" : ""
        
        value = String(value).replace(/\D/g, "")

        value = Number(value) / 100

        value = value.toLocaleString("pt-BR", {
            style: "currency",
            currency: "BRL"
        })

        return signal + value
    }
}

const Form = {
    description: document.querySelector('input#description'),
    amount: document.querySelector('input#amount'),
    date: document.querySelector('input#date'),

    getValues(){
        return{
            description: Form.description.value,
            amount: Form.amount.value,
            date: Form.date.value
        }
    },

    validateFields(){
        const { description, amount, date} = Form.getValues()
        
        if (description.trim() === "" || amount.trim() === "" || date.trim() === "" ){
            throw new Error("Por favor, preencha todos os campos")
        }
    },

    formatValues(){
        let { description, amount, date} = Form.getValues()

        amount = Utils.formatAmount(amount)

        date = Utils.formatDate(date)

        return {
            description,
            amount,
            date
        }
    },

    clearFields(){
        Form.description.value = ""
        Form.amount.value = ""
        Form.date.value = ""
    },

    submit(event){
        event.preventDefault()

        try {
            Form.validateFields()
            const transaction = Form.formatValues()
            Transaction.add(transaction)
            Form.clearFields()
            Modal.close() 
        } catch (error) {
            alert(error.message)
        }
    }
}


const App = {
    init(){
        
        Transaction.all.forEach(DOM.addTransaction)

        DOM.updateBalance()

        Storage.set(Transaction.all)
    },
    reload(){
        DOM.clearTransaction()
        App.init()
    },
}
App.init()