function gladiatorInvertory(gears) {
  let invertory = gears.shift().split(" ");
  let gearsLength = gears.length;

  for (let i = 0; i < gearsLength; i++) {
    let command = gears[i].split(" ");
    let item = command[1];

    switch (command[0]) {
      case "Buy":
        buy(invertory, item);
        break;
      case "Trash":
        trash(invertory, item);
        break;
      case "Repair":
        repair(invertory, item);
        break;
      case "Upgrade":
        upgrade(invertory, item);
        break;
    }
  }
  console.log(invertory.join(" "));
}

function buy(invertory, item) {
  if (!invertory.includes(item)) {
    invertory.push(item);
  }
}

function trash(invertory, item) {
  if (invertory.includes(item)) {
    let index = invertory.indexOf(item);
    invertory.splice(index, 1);
  }
}

function repair(invertory, item) {
  if (invertory.includes(item)) {
    let index = invertory.indexOf(item);
    let repairedItem = invertory.splice(index, 1).join();
    invertory.push(repairedItem);
  }
}

function upgrade(invertory, item) {
  let upgrade = item.split("-");

  if (invertory.includes(upgrade[0])) {
    let index = invertory.indexOf(upgrade[0]);
    let upgradedItem = invertory[index] + ":" + upgrade[1];
    invertory.splice([index + 1], 0, upgradedItem);
  }
}