const THRESHOLD_FIDELITY = 150 ;

// mutation observer for the video element
const videoTitle = document.querySelector('#video-title');

// const pastryIframe = document.querySelector('#connie-pastries')


const observer = new IntersectionObserver(entries => {
    // note - if the boundingClientRect.y is negative, then they are scrolling down
    // note - since using id, only 1 entry
    const {intersectionRatio} = entries[0];
    if (intersectionRatio !== 1) {
        videoTitle.currentTime = 5 - 3 * intersectionRatio;
    } else {
        videoTitle.currentTime = 2;
    }
}, {
    threshold: [...Array(THRESHOLD_FIDELITY).keys()].map(num => num/THRESHOLD_FIDELITY),
    rootMargin: '-100px 0px 0px 0px'
});

// after two seconds pause the video
setTimeout(() => {
    videoTitle.pause();
    videoTitle.currentTime = 2;
    observer.observe(videoTitle);
}, 2500)

// borrowed from https://www.w3schools.com/howto/howto_js_collapse_sidepanel.asp
/* Set the width of the sidebar to 250px (show it) */
openNav = () => {
    document.querySelector('#sidepanel').style.width = "250px";
}

/* Set the width of the sidebar to 0 (hide it) */
closeNav = () => {
    document.querySelector('#sidepanel').style.width = "0";
}