const Maths = Math; // Yes, I'm that patriotic.
const hellos = ['Hewwo!', 'Hello!', 'Awoo!'];

const imaTypingSpeed = 100;
const imaDeletingSpeed = 50;
const imaGapTime = 1500;
const imaTexts = ['dumbass', 'network engineer', 'Arch Linux user', 'programmer', 'furry', 'massive nerd'];

function pickRandom(array) {
    return array[Maths.floor(Maths.random() * array.length)];
}

window.addEventListener('load', (e) => {
    // ----- Hellos section -----
    const helloEl = document.getElementById('helloText');
    helloEl.innerText = pickRandom(hellos);

    // ----- I'm a text section -----
    const imaEl = document.getElementById('imaText');
    let imaSelection = 0;
    let imaCharIdx = 0;
    let currentIntervalID = -1;

    const typeFunc = () => {
        imaEl.innerText += imaTexts[imaSelection][imaCharIdx];
        imaCharIdx++;

        if (imaCharIdx >= imaTexts[imaSelection].length) {
            clearInterval(currentIntervalID);
            setTimeout(() => {
                currentIntervalID = setInterval(deleteFunc, imaDeletingSpeed)
            }, imaGapTime);
        }
    };

    const deleteFunc = () => {
        imaEl.innerText = imaEl.innerText.slice(0, -1);

        if (imaEl.innerText == '') {
            imaCharIdx = 0;
            imaSelection += 1;
            if (imaSelection >= imaTexts.length) {
                imaSelection = 0;
            }
            clearInterval(currentIntervalID);
            currentIntervalID = setInterval(typeFunc, imaTypingSpeed);
        }
    };

    currentIntervalID = setInterval(typeFunc, imaTypingSpeed);
});