OnTimeForExam-Problem

function exam (input) {
    let examHour = Number(input.shift());
    let examMinutes = Number(input.shift());
    let arriveHour = Number(input.shift());
    let arriveMinutes = Number(input.shift());

    let examTotalMinutes = (examHour * 60) + examMinutes;
    let arriveTotalMinutes = (arriveHour * 60) + arriveMinutes;

    let arrive;
    let time;
    let text;
    let timeHour;

    if (arriveHour > examHour) {
        arrive = "Late";
        timeHour = Math.floor((arriveTotalMinutes - examTotalMinutes) / 60);
        time = (arriveTotalMinutes - examTotalMinutes) % 60;

        if (timeHour === 0) {
            text = (`${time} minutes after the start`);

        }else {
        text = (`${timeHour}:${time} hours after the start`);
        }

    }else if ((arriveHour === examHour) && (arriveMinutes > examMinutes)){
        arrive = "Late";
        time = arriveMinutes - examMinutes;
        text = (`${time} minutes after the start`);

    }else if (arriveHour === examHour && arriveMinutes === examMinutes) {
        arrive = "On Time";
        text = "";

    }else if((arriveHour < examHour) && (((60-arriveMinutes) + examMinutes) <= 30)) {
        arrive = "On Time";
        time = (examTotalMinutes - arriveTotalMinutes) % 60;
        text = (`${time} minutes before the start`);

    }else if (arriveHour < examHour && (((60-arriveMinutes) + examMinutes) > 30)) {
        arrive = "Early";
        timeHour = Math.floor((examTotalMinutes - arriveTotalMinutes) / 60);
        time = (examTotalMinutes - arriveTotalMinutes) % 60;

        if (time < 10) {
            text = (`${timeHour}:0${time} hours before the start`);

        }else if (timeHour === 0) {
            text = (`${time} minutes before the start`);
        }else {
            text = (`${timeHour}:${time} hours before the start`);
        }
    }

    console.log(arrive);
    console.log(text);

}