script.js

document.addEventListener("DOMContentLoaded", () => {
    const resultEl = document.getElementById('result');
    const lengthEl = document.getElementById('length');
    const uppercaseE1 = document.getElementById('uppercase');
    const lowercaseE1 = document.getElementById('lowercase');
    const numbersE1 = document.getElementById('number');
    const symbolsE1 = document.getElementById('symbol');
    const generateE1 = document.getElementById('generate');
    const clipboardE1 = document.getElementById('clipboard');

    const randomFunc = {
        lower: getRandomLowercase,
        upper: getRandomUppercase,
        number: getRandomNumbers,
        symbol: getRandomSymbols
    };

    generateE1.addEventListener('click', () => {
        const length = +lengthEl.value;
        const hasLower = lowercaseE1.checked;
        const hasUpper = uppercaseE1.checked;
        const hasNumber = numbersE1.checked;
        const hasSymbol = symbolsE1.checked;

        resultEl.innerText = generatePassword(hasLower, hasUpper, hasNumber, hasSymbol, length);
    });

    clipboardE1.addEventListener('click', copyToClipboard);

    function copyToClipboard() {
        const password = resultEl.innerText;
        if (!password) {
            alert('No password to copy!');
            return;
        }

        navigator.clipboard.writeText(password)
            .then(() => {
                alert('Password copied to clipboard!');
            })
            .catch(err => {
                console.error('Failed to copy:', err);
            });
    }

    function generatePassword(lower, upper, number, symbol, length) {
        let generatedPassword = '';
        let typeCount = lower + upper + number + symbol;

        const typeArr = [
            { key: 'lower', enabled: lower },
            { key: 'upper', enabled: upper },
            { key: 'number', enabled: number },
            { key: 'symbol', enabled: symbol }
        ].filter(item => item.enabled);

        if (typeCount === 0) {
            return '';
        }

        for (let i = 0; i < length; i += typeCount) {
            typeArr.forEach(type => {
                const keyFromRandomFun = type.key;
                generatedPassword += randomFunc[keyFromRandomFun]();
            });
        }

        return generatedPassword.slice(0, length);
    }

    function getRandomLowercase() {
        return String.fromCharCode(Math.floor(Math.random() * 26) + 97);
    }

    function getRandomUppercase() {
        return String.fromCharCode(Math.floor(Math.random() * 26) + 65);
    }

    function getRandomNumbers() {
        return String.fromCharCode(Math.floor(Math.random() * 10) + 48);
    }

    function getRandomSymbols() {
        const symbols = "!@#$%&*(){}[]=<>/,.";
        return symbols[Math.floor(Math.random() * symbols.length)];
    }
});