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

class MakeSection {

    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("section.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 sectid = parsed[0];
		String courseid = parsed[1];
		String prof = parsed[2];
		String yroffered = parsed[3];
		String ctitle = jedis.get("course:"+courseid+":title");
		System.out.println("sectid:"+sectid+" courseid:"+courseid+" prof:"+prof+" yroffered:"+yroffered+" ctitle:"+ctitle);
		jedis.rpush("section",sectid);
		jedis.set("section:"+sectid+":courseid",courseid);
		jedis.set("section:"+sectid+":prof",prof);
		jedis.set("section:"+sectid+":yroffered",yroffered);
		jedis.hset("section:"+sectid,"courseid",courseid);
		jedis.hset("section:"+sectid,"prof",prof);
		jedis.hset("section:"+sectid,"yroffered",yroffered);
		jedis.sadd("course:"+courseid+":sections",sectid);
		jedis.sadd("taughtby:"+prof,sectid);
		if(ctitle!=null){
		    jedis.set("section:"+sectid+":ctitle",ctitle);
		    jedis.hset("section:"+sectid,"ctitle",ctitle);
		    jedis.sadd("course:"+courseid+":ctitle",ctitle);
		}
	    }
	}
    }
}