package Assignment4S19;

import java.io.File;
import java.util.Formatter;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Scanner;

import javax.swing.JFileChooser;

public class CountWords {
	static void countEachWord(File file, Map<String, Integer> words) {

		try {
			Scanner input = new Scanner(file);
			while (input.hasNext()) {
				String next = input.next();
				next = next.toLowerCase();
				Integer count = words.get(next);
				if (count != null)
					count++;
				else
					count = 1;
				words.put(next, count);
			}
			input.close();
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	}

	public static void main(String[] args) {

		try {
			Map<String, Integer> words = new LinkedHashMap<String, Integer>();
			JFileChooser chooser = new JFileChooser();
			int num = chooser.showOpenDialog(null);
			File file = chooser.getSelectedFile();
			Scanner input2 = new Scanner(file);
			countEachWord(file, words);
			String filename = file.getName();
			System.out.println(filename);
			String outputFileName = filename.substring(0, filename.length() - 4);
			outputFileName += "_Out.txt";

			File outputFile = new File(outputFileName);
			if (outputFile.createNewFile()) {
				System.out.println("File created.");
			} else {
				System.out.println("File already exists.");
			}
			Formatter formatter = new Formatter("C:\\CST8284\\output\\"+outputFile);
			Iterator it = words.entrySet().iterator();
			while (it.hasNext()) {
				Map.Entry pair = (Map.Entry) it.next();
				formatter.format("%s\t%d%n", pair.getKey(), pair.getValue());
				it.remove();
			}
			formatter.close();
			input2.close();
		} catch (Exception e) {
			System.out.println(e.getMessage());
		}
	}
}