import java.util.*;
import java.io.*;
import redis.clients.jedis.Jedis; 

class MakeStudent {

    public static void main(String[] args) throws FileNotFoundException {

        // hostname is command-line arg, or localhost by default  
        String hostname = "localhost";
        if(args.length>0){
            hostname = args[0];
        }

        //Connecting to Redis server on localhost
        Jedis jedis = new Jedis(hostname);
	System.out.println("Connection to server sucessfully"); 

	//check whether server is running or not 
	System.out.println("Server is running: "+jedis.ping()); 

	Scanner scan = new Scanner(new File("student.txt"));

	while(scan.hasNextLine()){
	    String line = scan.nextLine();
	    String[] parsed = line.split("\t");
	    if(parsed.length!=4){
		System.out.println("error in line:"+line);
	    }
	    else {
		String sid = parsed[0];
		String sname = parsed[1];
		String majorid = parsed[2];
		String gradyr = parsed[3];
		String major = jedis.get("dept:"+majorid+":dname");
		System.out.println("sid:"+sid+" sname:"+sname+" majorid:"+majorid+" gradyr:"+gradyr+" major:"+major);
		jedis.rpush("student",sid);
		jedis.set("student:"+sid+":sname",sname);
		jedis.set("student:"+sid+":majorid",majorid);
		jedis.set("student:"+sid+":gradyr",gradyr);
		jedis.hset("student:"+sid,"sname",sname);
		jedis.hset("student:"+sid,"majorid",majorid);
		jedis.hset("student:"+sid,"gradyr",gradyr);
		jedis.sadd("dept:"+majorid+":majors",sid);
		jedis.sadd("classof:"+gradyr,sid);
		if(major!=null){
		    jedis.set("student:"+sid+":major",major);
		    jedis.hset("student:"+sid,"major",major);
		    jedis.sadd("dept:"+major+":majors",sid);
		}
	    }
	}
    }
}