var obj1, obj2, obj3, obj4, obj5, obj6, obj7;
var composers;

function init()
{
    obj1 = obj("Bach", 1);
    obj2 = obj("Beethoven", 2);
    obj3 = obj("Mozart", 3);
    obj4 = obj("Vivaldi", 4);
    obj5 = obj("Wagner", 5);
    obj6 = obj("Verdi", 6);
    obj7 = obj("Straus", 7);

    composers = [obj6, obj4, obj2, obj7, obj5, obj3, obj1];

    //unsorted
    printComposers();

    //sorted
    sortComposers();
    printComposers();

    //average
    console.log(calculateAverage());
}

function obj(names, rankings)
{
    return {
        name: names,
        ranking: rankings
    };
}

function sortComposers()
{
    let max;            //used as index for sorting
    let tmpObj;         //temporary object
    let array = [];     //temproary array

    //find largest ranking and push it to the end of a temporary array
    while(composers.length > 0)
    {
        max = 0;

        for(let i = 0; i < composers.length; i++)
        {
            if(composers[max].ranking > composers[i].ranking)
                max = i;
        }
        tmpObj = composers.splice(max, 1);
        array.push(obj(tmpObj[0].name, tmpObj[0].ranking));
    }

    //copy back into original composers array
    composers = JSON.parse(JSON.stringify(array));
}

function printComposers()
{
    for(let i = 0; i < composers.length; i++)
        console.log(composers[i].ranking + ": " + composers[i].name);
}

function calculateAverage()
{
    let average = 0;

    for(let i = 0; i < composers.length; i++)
        average += composers[i].ranking;

    return average / composers.length;
}

document.addEventListener("DOMContentLoaded", init, false);