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" : "expenses"

         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>
                <img onclick="Transaction.remove(${index})" src="./assets/minus.svg" alt="Remover transação">
        </td>
        `
        return html
    },

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

    clearTransactions(){
        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
        }
    },

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

    submit(event){
        event.preventDefault()
    
        try{
            Form.validateFields()
            const transaction = Form.formatValues()
            Transaction.add(transaction)
            Form.clearFieds()
            Modal.close()

        }catch (error){
            alert(error.message)
        }
    }
}

const App = {
    init() {

        Transaction.all.forEach(DOM.addTransaction)
            
        DOM.uptadeBalance()

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

App.init()