03. Heart Delivery

function heartDelivery(input) {
    let houses = input.shift().split('@').map(Number);
    let index = 0;

    while (input[0] !== 'Love!') {
        index += Number(input.shift().slice(5));
        if (index >= houses.length){
            index = 0;
        }

        if (houses[index] == 0) {
            console.log(`Place ${index} already had Valentine's day.`);
        } else {
            houses[index] -= 2;
            if (houses[index] == 0) {
                console.log(`Place ${index} has Valentine's day.`);
            }
        }
    }

    console.log(`Cupid's last position was ${index}.`);
    let houseCount = houses.filter(x => x !== 0).length;
    console.log(houseCount === 0 ? 'Mission was successful.' : `Cupid has failed ${houseCount} places.`);
    return;
}