package algs35;
import stdlib.*;
/* ***********************************************************************
 *  Compilation:  javac LookupCSV.java
 *  Execution:    java LookupCSV file.csv keyField valField
 *  Dependencies: ST.java In.java StdIn.java StdOut.java
 *  Data files:   http://algs4.cs.princeton.edu/35applications/DJIA.csv
 *                http://algs4.cs.princeton.edu/35applications/UPC.csv
 *                http://algs4.cs.princeton.edu/35applications/amino.csv
 *                http://algs4.cs.princeton.edu/35applications/elements.csv
 *                http://algs4.cs.princeton.edu/35applications/ip.csv
 *                http://algs4.cs.princeton.edu/35applications/morse.csv
 *
 *  Reads in a set of key-value pairs from a two-column CSV file
 *  specified on the command line; then, reads in keys from standard
 *  input and prints out corresponding values.
 *
 *  % java LookupCSV amino.csv 0 3     % java LookupCSV ip.csv 0 1
 *  TTA                                www.google.com
 *  Leucine                            216.239.41.99
 *  ABC
 *  Not found                          % java LookupCSV ip.csv 1 0
 *  TCT                                216.239.41.99
 *  Serine                             www.google.com
 *
 *  % java LookupCSV amino.csv 3 0     % java LookupCSV DJIA.csv 0 1
 *  Glycine                            29-Oct-29
 *  GGG                                252.38
 *                                     20-Oct-87
 *                                     1738.74
 *
 *
 *************************************************************************/

public class LookupCSV {
	public static void main(String[] args) {
		args = new String[] { "data/ip.csv", "0", "1" }; StdIn.fromString ("www.google.com");
		//        args = new String[] { "data/ip.csv", "1", "0" }; StdIn.fromString ("216.239.41.99");
		//        args = new String[] { "data/amino.csv", "0", "3" }; StdIn.fromString ("TTA");

		int keyField = Integer.parseInt(args[1]);
		int valField = Integer.parseInt(args[2]);

		// symbol table
		ST<String, String> st = new ST<>();

		// read in the data from csv file
		In in = new In(args[0]);
		while (in.hasNextLine()) {
			String line = in.readLine();
			String[] tokens = line.split(",");
			String key = tokens[keyField];
			String val = tokens[valField];
			st.put(key, val);
		}

		while (!StdIn.isEmpty()) {
			String s = StdIn.readString();
			if (st.contains(s)) StdOut.println(st.get(s));
			else                StdOut.println("Not found");
		}
	}
}