package SBC;

public class ProcessorStatus {
    public String name;
    public int user;
    public int nice;
    public int system;
    public int idle;
    public int iowait;
    public int irq;
    public int softirq;
    public int steal;
    public int guest;
    public int guest_nice;

    /**
     * Calculate total CPU time
     * @return Total CPU time
     */
    public int total_time(){
        return user + nice + system + idle + iowait + irq + softirq + steal + guest + guest_nice;
    }

    /**
     * Calculate idle CPU time
     * @return Idle CPU time
     */
    public int idle_time(){
        return idle + iowait;
    }

    /**
     * Calculate CPU usage percentage
     * @param prev Previous CPU information
     * @return CPU usage percentage 0 - 100
     */
    public int cpu_usage(ProcessorStatus prev){
        if (prev!=null){
            int total_diff = total_time() - prev.total_time();
            int idle_diff = idle_time() - prev.idle_time();
            return (int)(100.0 * (total_diff - idle_diff) / total_diff);
        }
        return 0;
    }
}