za stanku

function test(arr) {
  let plantInfoCount = Number(arr.shift());
  let plantInfo = {};

  for (let i = 0; i < plantInfoCount; i++) {
    let [plantName, rarity] = arr.shift().split('<->');

    if (!plantInfo[plantName]) {
      plantInfo[plantName] = {};
    }

    plantInfo[plantName]['Rarity'] = Number(rarity);
    plantInfo[plantName]['Rating'] = [];
  }

  let commandInfo = arr.shift();

  while (commandInfo != 'Exhibition') {
    let [command, plantCommandInfo] = commandInfo.split(': ');
    let [plantName, value] = plantCommandInfo.split(' - ');

    switch (command) {
      case 'Rate': ratingHandler(plantName, Number(value)); break;
      case 'Update': updateRarityHandler(plantName, Number(value)); break;
      case 'Reset': resetRatingHandler(plantName); break;
    }

    commandInfo = arr.shift();
  }

  function ratingHandler(plantName, rating) {
    if (!plantInfo[plantName]) {
      console.log('error');
      return;
    }

    plantInfo[plantName]['Rating'].push(rating);
  }

  function updateRarityHandler(plantName, rarity) {
    if (!plantInfo[plantName]) {
      console.log('error');
      return;
    }

    plantInfo[plantName]['Rarity'] = Number(rarity);
  }

  function resetRatingHandler(plantName) {
    if (!plantInfo[plantName]) {
      console.log('error');
      return;
    }

    plantInfo[plantName]['Rating'] = [];
  }

  let avgRatingSort = Object.entries(plantInfo).sort((a, b) => {
    let firstAvgRating = 0;
    let secondAvgRating = 0;

    if (a[1]['Rating'].length !== 0) {
      firstAvgRating = (a[1]['Rating'].reduce((acc, curr) => acc += curr, 0) / a[1]['Rating'].length);
    }

    if (b[1]['Rating'].length !== 0) {
      secondAvgRating = (b[1]['Rating'].reduce((acc, curr) => acc += curr, 0) / b[1]['Rating'].length);
    }

    return secondAvgRating - firstAvgRating;
  });

  let raritySort = avgRatingSort.sort((a, b) => b[1]['Rarity'] - a[1]['Rarity']);

  console.log('Plants for the exhibition:');

  for (let kvp of raritySort) {
    let avgSum = 0;

    if (kvp[1]['Rating'].length > 0) {
      avgSum = (kvp[1]['Rating'].reduce((a, c) => a += c, 0) / kvp[1]['Rating'].length);
    }

    console.log(`- ${kvp[0]}; Rarity: ${kvp[1]['Rarity']}; Rating: ${avgSum.toFixed(2)}`);
  }
}