Gladiator Inventory

       function solve(input) {
       let inventory = input.shift().split(' ');
       let commands = input;

        for (let i=0; i<commands.length;i++) {
        let tokens = commands[i].split(' ');
        if (tokens[0]==='Buy') {
            if (!inventory.includes(tokens[1])) {
                inventory.push(tokens[1]);
            }

        } else if (tokens[0]==='Trash') {
            if (inventory.includes(tokens[1])) {
                inventory.splice(inventory.indexOf(tokens[1]), 1);
            }
        } else if (tokens[0]==='Repair') {
            if (inventory.includes(tokens[1])) {
                inventory.splice(inventory.indexOf(tokens[1]), 1);
                inventory.push(tokens[1]);
            }
        } else if (tokens[0]==='Upgrade') {
                let upgradeArray = tokens[1].split('-');
                let el=upgradeArray[0];
                if (inventory.includes(el)) {

                inventory.splice(inventory.indexOf(el)+1, 0, el+':'+upgradeArray[1]);
                }
        }
      }
      console.log(inventory.join(' '));
    }
/*solve(['SWORD Shield Spear',
'Buy Bag',
'Trash Shield',
'Repair Spear',
'Upgrade SWORD-Steel']
);*/