viarno reshenie plant discovery - final exam

function plant(input) {
    let actions = {
        "Rate": rate,
        "Update": update,
        "Reset": reset
    };
    let catalog = {};
    let n = Number(input.shift());
    for (let i = 0; i < n; i++) {
    let [name, rarity] = input.shift().split("<->");

         catalog[name] = {
            rarity: Number(rarity),
            ratings: [],
            avgRating: 0
         };
    }
       // console.log(catalog);
    while (input[0] != "Exhibition") {
        let [command, params] = input.shift().split(": ");
        let action = actions[command];
        action(params);
    }
        let sorted = Object.entries(catalog).sort(comparePlants);
      // console.log(sorted);
        //console.log('First element', sorted[0]);
        //let firstElement = sorted[1];
        //console.log('First element', firstElement);
        //console.log(`First element key`, firstElement[0])
        //console.log('First element value', firstElement[1]);
        //console.log(firstElement[1].ratings);

        function comparePlants(a, b) {
            let rarityA = a[1].rarity;
            let rarityB = b[1].rarity;

            let ratingA = a[1].avgRating;
            let ratingB = b[1].avgRating;

            return (rarityB - rarityA) || (ratingB - ratingA);
        }

        console.log(`Plants for the exhibition:`);
        for (let [name, plant] of sorted) {
            console.log(`- ${name}; Rarity: ${plant.rarity}; Rating: ${plant.avgRating.toFixed(2)}`);
        }


        function rate(line) {
            let [name, rating] = line.split(" - ");
            if (catalog[name] != undefined) {
                let plant = catalog[name];
                plant.ratings.push(Number(rating));

                let total = 0;
                for (let rating of plant.ratings) {
                   total += rating;
                }
                plant.avgRating = total / plant.ratings.length;
            } else {
                console.log("error");
            }
        }
         function update (line) {
            let [name, rarity] = line.split(" - ");
            if (catalog[name] != undefined) {
                let plant = catalog[name];
                plant.rarity = Number(rarity);
            } else {
                console.log(`error`);
            }
        }
        function reset (name) {
            if (catalog[name] != undefined) {
                let plant = catalog[name];
                plant.ratings.length = 0;
                plant.avgRating = 0;
            } else {
                console.log("error");
            }
        }
        line = input.shift();
    }



plant(['3',
'Arnoldii<->4',
'Woodii<->7',
'Welwitschia<->2',
'Rate: Woodii - 10',
'Rate: Welwitschia - 7',
'Rate: Arnoldii - 3',
'Rate: Woodii - 5',
'Update: Woodii - 5',
'Reset: Arnoldii',
'Exhibition']);