package exercise04;

import java.io.*;
import java.util.HashMap;
import java.util.Map;

public class PropertyReader {
	public static void main(String[] args) throws IOException {
		try {
			BufferedReader reader = new BufferedReader(new FileReader(args[0]));

			Map<String, String> props = readProps(reader);
			for (String key : props.keySet()) {
				System.out.println(key + ": " + props.get(key));
			}
		} catch (WrongPropertySyntaxException e) {
			System.err.println(e.getMessage());
		} catch (FileNotFoundException e) {
			System.err.println("File not found.");
		}
	}

	private static Map<String, String> readProps(BufferedReader reader) throws IOException {
		String line;
		Map<String, String> res = new HashMap<>();
		try {
			while ((line = reader.readLine()) != null) {
				String[] split = line.split(":");
				if (split.length == 2) {
					res.put(split[0].trim(), split[1].trim());					
				} else {
					throw new WrongPropertySyntaxException("Property file is not good");
				}
			}
		} finally {
			reader.close();
		}
		return res;
	}
}