You badly tore a muscle and also damaged a tendon or ligament. The swelling and purple bruising are secretions from the tear and the body attempting to repair itself. Unfortunately, this isn't something that's going to heal in a few days. Generally, it will take a few weeks to a month or more depending on the severity. If you notice any small bulges around the area that hurts, it means that muscle had contracted almost into a ball because it's only partially connected. Worse case scenario is when it's completely unconnected, which I've had happen before and it required surgery on my entire arm.