package SO1;

import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

public class Processor
{
    private static List<Process> queue = new LinkedList<>();
    private static List<Process> waitingTime = new ArrayList<>();
    public static Procedure procedure;
    private static int generalTime =0;
    public static boolean canContinue = true;
    private static Process current;
    private static int timeQuantum=0;


    public static void setTimeQuantum(int q)
    {
        timeQuantum=q;
    }

    public static void addProcessToQueue(Process p)
    {
        p.set_addTime(generalTime);

        if(procedure==Procedure.SJFW && current!=null)
        {
            if(p.getTime() < current.getTime())
            {
                canContinue = false;
                queue.add(0,p);
            }
        }

        if(procedure==Procedure.SJF || ( procedure==Procedure.SJFW && canContinue))
        {
            int i =0;
            while (i<queue.size() && p.getTime()>=queue.get(i).getTime())
                i++;
            queue.add(i,p);
        }
        else if(procedure==Procedure.FCFS || procedure==Procedure.ROT)
        {
            queue.add(p);
        }

    }

    private static void executeProcess()    //wykonywanie wszystkich procesow oprocz ROT
    {
        if(!canContinue)
            canContinue=true;

        while (current.getTime()>0)
        {
            if(!canContinue)
                return;

            generalTime++;
            current.executePart();
            ProcessorManager.checkIfIsSomeNewProcess();
        }
    }

    private static void  executeProcessROT()
    {
        if(!canContinue)
            canContinue=true;

        for(int i=0; i<=timeQuantum;i++)
        {
            generalTime++;
            current.executePart();
            ProcessorManager.checkIfIsSomeNewProcess();

            if (current.getTime() <= 0)
                return;
        }

        canContinue=false;
        queue.remove(current);
        queue.add(current);



    }

    public static void runProcessor()
    {

        while (!queue.isEmpty())
        {
            current = queue.get(0);
            if(procedure==Procedure.ROT)
                executeProcessROT();
            else
                executeProcess();

            if(canContinue)
            {
                current.set_endTime(generalTime);
                queue.remove(current);
                waitingTime.add(current);
            }

        }

        print();
    }

    public static void countAverage()
    {
        double total =0;
        for(Process p: waitingTime)
        {
            total+= p.getWaitingTime();
        }

        double average= total/ waitingTime.size();

        System.out.println("ŚREDNI CZAS (" +procedure + ") :" + average + " ");

        waitingTime.removeAll(waitingTime);
    }

    public static void print()
    {
        for(Process w: waitingTime)
        {
            System.out.println(w);
        }
    }

}