Coffee Lover JS Fundamentals Mid Exam

function coffeeLover(arr) {
    let coffees = arr.shift().split(" ");
    let numberOfCommands = Number(arr.shift());

    for (let i = 0; i < numberOfCommands; i++) {
      let tokens = arr[i].split(" ");
      let command = tokens[0];

      if (command === "Include") {
        let coffee = tokens[1];
        coffees.push(coffee);
      } else if (command === "Remove") {
        let direction = tokens[1];
        let count = Number(tokens[2]);
        if (direction === "first") {
          coffees.splice(0, count);
        } else if (direction === "last") {
          coffees.splice(-count, count);
        }
      } else if (command === "Prefer") {
        let index1 = Number(tokens[1]);
        let index2 = Number(tokens[2]);
        if (index1 >= 0 && index1 < coffees.length && index2 >= 0 && index2 < coffees.length) {
          let temp = coffees[index1];
          coffees[index1] = coffees[index2];
          coffees[index2] = temp;
        }
      } else if (command === "Reverse") {
        coffees.reverse();
      }
    }
    console.log("Coffees:");
    console.log(coffees.join(" "));
  }