script.js

class Application {
    constructor() {
        this.button = document.getElementById('button-choose');
        this.button.addEventListener('click', this.getData);
    }
    getData = () => {
        let initialSum = +document.getElementById('initial-sum-input').value;
        let monthlyRefill = +document.getElementById('monthly').value;
        let depositTime = +document.getElementById('time').value;
        let depositCurrency = document.getElementById('currency').value;
        let resultBox = document.getElementById('result');
        let table = document.getElementById('resultTable');

        let clientData = new Deposit(initialSum, monthlyRefill, depositTime, depositCurrency);
        clientData.check();
        console.log(clientData);

        let calc = new Calculator();
        let result = calc.getDataFromClient();
        console.log(result);

        function drawTable(result) {
            if (result[0] == undefined) {
                resultBox.innerHTML = "<p>Нет подходящих вариантов</p>";
                table.style.display = "none";
            }
            if (result[0] != undefined) {
                resultBox.innerHTML = "";
                let rows = [];
                result.forEach(element => rows.push("<tr><td>" + element.bankName + "</td><td>" + element.investName + "</td><td>" +
                    element.incomeType + "</td><td>" + element.finalSum + "</td></tr>"))
                table.style.display = "block";
                let fullRows = "";
                for (let i = 0; i < rows.length; i++) {
                    fullRows += rows[i];
                }
                table.innerHTML = "<tr class='head'><th>Название банка</th><th>Вклад</th><th>Процент</th><th>Итоговая сумма</th></tr>"
                    + fullRows;
            }
        }
        drawTable(result);
    }
}

class Deposit {
    constructor(initial, monthly, time, currency) {
        this.initial = initial;
        this.monthly = monthly;
        this.time = time;
        this.currency = currency;
    }
    check = () => {
        if (this.initial >= 0 && this.monthly >= 0 && Number.isInteger(+this.time) && this.time > 0 && (this.currency == 'RUB' || this.currency == 'USD')) {
            console.log('ok')
        }
        else {
            alert('Ошибка!');
        }
    }
}

class BankProduct {
    constructor(initial, monthly, time, currency) {
        this.initial = initial;
        this.monthly = monthly;
        this.time = time;
        this.currency = currency;
    }
    getBankArray = () => {
        let banks = [...deposits];       
        return banks;
    }
}

class Calculator {
    getDataFromClient = (initialSum, monthlyRefill, depositTime, depositCurrency) => {
        initialSum = +document.getElementById('initial-sum-input').value;
        monthlyRefill = +document.getElementById('monthly').value;
        depositTime = +document.getElementById('time').value;
        depositCurrency = document.getElementById('currency').value;

        let bankProduct = new BankProduct();
        let newArray = bankProduct.getBankArray();

        function currencyFilter(depositCurrency, newArray) {
            let currencyArray = [];
            newArray.forEach(element => {
                if (element.currency == depositCurrency) {
                    currencyArray.push(element);
                }
            });            
            return currencyArray;
        }

        let firstFiltered = currencyFilter(depositCurrency, newArray);
        console.log(firstFiltered);

        function canRefill(monthlyRefill, array) {
            let resultArray = [];
            for (let i = 0; i < array.length; i++) {
                if (monthlyRefill == 0 && array[i].canDeposit == false) {
                    resultArray.push(array[i]);
                }
                else if (monthlyRefill > 0 && array[i].canDeposit == true) {
                    resultArray.push(array[i]);
                }
            }
            return resultArray;
        }
        let secondFiltered = canRefill(monthlyRefill, firstFiltered);
        console.log(secondFiltered);

        function minMaxAmountFilter(initialSum, array) {
            let result = array.filter(element => element.sumMin <= initialSum);
            let result2 = [];
            result.forEach(element => {
                if (element.sumMax == null) {
                    result2.push(element);
                }
                else if (element.sumMax >= initialSum) {
                    result2.push(element);
                }
            }
            )
            return result2;
        }

        let thirdFiltered = minMaxAmountFilter(initialSum, secondFiltered);
        console.log(thirdFiltered);

        function minMaxTermFilter(depositTime, array) {
            let result = array.filter(element => element.termMin <= depositTime);
            return result;
        }

        let forthFiltered = minMaxTermFilter(depositTime, thirdFiltered);
        console.log(forthFiltered);

        function bestSuggestion(array, initialSum, depositTime) {
            let result = array.map(element => {
                return {
                    bankName: element.bankName,
                    investName: element.investName,
                    incomeType: element.incomeType,
                    finalSum: Math.trunc(initialSum * (Math.pow((1 + element.incomeType / 100), depositTime / 12)))
                }
            });

            const newArr = [...result];
            newArr.sort((objectOne, objectTwo) => objectTwo.finalSum - objectOne.finalSum);
            let maximum = newArr[0];
            const equalToMaximum = newArr.filter(element => element.finalSum == maximum.finalSum);
            return equalToMaximum;
        }

        let finalSuggestion = bestSuggestion(forthFiltered, initialSum, depositTime);
        return finalSuggestion;
    }
}

let application = new Application();