09. On Time for the Exam - Conditional Statements Advanced

function onTimeForTheExam(input) {
let hourOfExam = Number(input.shift());
    let minutesOfExam = Number(input.shift());
    let hoursOfArriving = Number(input.shift());
    let minutesOfArriving = Number(input.shift());

    let totalMinutesOfExam = hourOfExam * 60 + minutesOfExam;
    let totalMinutesOfArriving = hoursOfArriving * 60 + minutesOfArriving;

    if (totalMinutesOfArriving > totalMinutesOfExam) {
        console.log("Late");
        let timeLate = totalMinutesOfArriving - totalMinutesOfExam;
        if (timeLate < 60) {
            console.log(`${timeLate} minutes after the start`);
        } else {
            let hours = Math.floor(timeLate / 60);
            let minutes = timeLate % 60;
            if (minutes < 10) {
                console.log(`${hours}:0${minutes} hours after the start`);
            } else {
                console.log(`${hours}:${minutes} hours after the start`);
            }
        }
    } else if (totalMinutesOfExam - totalMinutesOfArriving <= 30) {
        console.log("On time");
        let early = totalMinutesOfExam - totalMinutesOfArriving;
        if (early !== 0) {
            console.log(`${early} minutes before the start`);
        }
    } else if (totalMinutesOfExam - totalMinutesOfArriving > 30) {
        console.log("Early");
        let earlyMinutes = totalMinutesOfExam - totalMinutesOfArriving;
        let hours = Math.floor(earlyMinutes / 60);
        let minutes = earlyMinutes % 60;

        if (earlyMinutes < 60) {
            console.log(`${minutes} minutes before the start`);
        } else {
            if (minutes < 10) {
                console.log(`${hours}:0${minutes} hours before the start`);
            } else {
                console.log(`${hours}:${minutes} hours before the start`);
            }
        }
    }
}