import java.io.IOException;
import java.net.URL;
import java.util.Scanner;

import javax.swing.JOptionPane;

public class Assignment2 {

	private static Place[] places;

	public static void main(String[] args) {

		// read the data set
		readData();

		// Query loop
		Scanner inS = new Scanner(System.in); // Open console input stream

		// useful query loop variables
		boolean more = true; // more input?
		String query; // query string (zip code)
		do {

			// get and parse user input
			// query = inS.nextLine();
			query = getUserInput();
			System.out.println("\nYou asked me to search for zip code: " + query);
			// search
			int result = search(places, query);
			if (result != -1) {
				 System.out.println("The zip code " + query + " belongs to " + places[result]);
			} else {
				System.out.println("The zip code " + query + " does not exist.");
			}
			// does user want more?
			System.out.print("Do you want me to search again (Yes/No)? ");
			String response = inS.nextLine();
			more = response.equalsIgnoreCase("yes");
		} while (more);

		System.out.println("Good Bye!");

	} // main()

	public static String getUserInput() {
		String inputStr = null;
		while (inputStr == null) {
			try {
				inputStr = JOptionPane.showInputDialog("Enter a zip code.");
			} catch(NumberFormatException e) {
				JOptionPane.showMessageDialog(null,
						"Bad numeric string - try again",
						"Input Error",
						JOptionPane.ERROR_MESSAGE);
			} // catch
		}
		return inputStr;
	} // getUserInput()
	
	public static int search(Place[] p, String zipCode) { // Linear Search
																	
		for (int i = 0; i < p.length; i++) {
			if (p[i].equals(zipCode)) {
				return i;
			}
		}
		return -1;
	} // Search()

	public static void readData() {

		try { // Create a valid web resource (URL)
			URL webFile = new URL("http://cs.brynmawr.edu/Courses/cs206/fall2017/DataFiles/uszipcodes.csv");

			// Open the file
			Scanner inS = new Scanner(webFile.openStream());
			String line;

			// Parse first line to get N
			line = inS.nextLine();
			String[] tokens = line.split(",");
			int N = Integer.parseInt(tokens[0]);
			System.out.println("There are " + N + " entries in input file.");
			places = new Place[N];	// Create the array of size. N
			
			int i=0;
			while (inS.hasNextLine()) {
				line = inS.nextLine();
				// Parse line...
				tokens = line.split(",");
				String town, state, zip;
				town = tokens[1];
				state = tokens[2];
				zip = tokens[0];
	
				Place p = new Place(town, state, zip);

				places[i] = p; // add to dataset
				i = i + 1;
			}
			inS.close();
			System.out.println("The dataset contains:" + places.length + " entries.");
		} catch (IOException e) {
			e.printStackTrace();
			System.exit(1);
		}
	} // readData()

} // class Assignment2