/*
file name:      ServerFarmSimulation.java
Authors:        Ike Lage
last modified:  03/07/2024
*/

public class ServerFarmSimulation {

    public static void main(String[] args) {

        //You can explore how these change your results if you want!
        //How often a new job arrives at the server farm, on average
        int meanArrivalTime = 3 ; 
        //How long a job takes to process, on average
        int meanProcessingTime = 100 ; 

        //Debugging settings
        int numServers = 4 ; //Numbers of servers in the farm
        int numJobs = 10 ; //Number of jobs to process
        boolean showViz = true ; //Set to true to see the visualization, and false to run your experiments

        //Main experiment settings
        /**
        int numServers = 34 ; //Numbers of servers in the farm
        int numJobs = 10000000 ; //Number of jobs to process
        boolean showViz = false ; //Set to true to see the visualization, and false to run your experiments
        */

        String dispatcherType = "random" ; //Which jobDispatcher to use

        //Initialize the job maker with the mean arrival and processing time
        JobMaker jobMaker = new JobMaker( meanArrivalTime , meanProcessingTime );

        //Create a dispatcher of the appropriate type
        JobDispatcher dispatcher = null ;
        if ( dispatcherType == "random" ){
            dispatcher = new RandomDispatcher( numServers , showViz ) ; 
        } else if ( dispatcherType == "round" ) { 
            dispatcher = new RoundRobinDispatcher( numServers , showViz ) ; 
        } else if ( dispatcherType == "shortest" ) {
            dispatcher = new ShortestQueueDispatcher( numServers , showViz ) ; 
        } else if ( dispatcherType == "least" ) {
            dispatcher = new LeastWorkDispatcher( numServers , showViz ) ; 
        }
        
        //Have the dispatched handle the specified number of jobs
        for ( int i = 0 ; i < numJobs ; i ++ ) {
            dispatcher.handleJob( jobMaker.getNextJob() ) ;
        }
        dispatcher.finishUp() ; //Finish all of the remaining jobs in Server queues
        
        
        //Print out the mean processing time
        System.out.println( "Dispatcher: " + dispatcherType + ", Avg. Wait time: " + dispatcher.getAverageWaitingTime() ) ;

    }


}