/*
 * CS161: Programming Assignment P5
 * Summer 2015 semester
 * Skeleton code provided by instructor for the CodeBreaker assignment.
 * Date: July 22, 2015
 */
public class CodeBreaker {

	// constants defined for English. 
	// You must use the constants and not the values in your program.
	public final int NUMBER_OF_LETTERS = 26;

	// knownFrequencies stores the results obtained from the training data. 
	// Each element stores the known frequency of the corresponding letter.
	private double[] knownFrequencies = new double[NUMBER_OF_LETTERS]; 

	// No constructor to be defined. Uses default constructor

	// This method is needed only for testing that you got the 
	// correct array of known frequency values.
	// Helps with grading and awarding partial credit.
	public double[] getKnownFrequencies() {
		// fill in this code
	}

	// This method is needed for testing to bypass the training method while
	// testing decryption functionality in case your training method isn't 
	// working correctly. Helps with grading and providing partial credit.
	public void setKnownFrequencies(double[] knownFrequencies) {
		// fill in this code
	}

	// Implements the training step. Sets the array knownFrequencies
	public void train(String trainingFileName) {
		// fill in this code
	}

	// Decrypts the contents of the file referred to by cipherTextFileName,
	// and produces an output file called outputFileName, which contains the
	// decrypted text using the decryption algorithm in the Caesar cipher. 
	// Returns that the value of shift that was used in the Caesar cipher.
	public int decrypt(String cipherTextFileName, String outputFileName) {

	}

	// barebones main method to test your code
	public static void main(String[] args) {
		CodeBreaker cb = new CodeBreaker();
		cb.train("sample.txt"); 
		cb.decrypt("encrypt-output.txt", "codebreaker-output.txt"); 
			// File encrypt-output.txt should be created if you run
			// the main method I provided for the Sentry class.
			// File codebreaker-output.txt will get 
			// created as a result of your decrypt method. 
	}
}