// Using the String class and a first view of conditionals in java
// You will need to consult the String class documentation to write this program.
import javax.swing.JOptionPane;
import uwcse.io.*;

/**
 * This class simulates a simple game: The player enters letter by letter the
 * name of the capital of a US state.<br>
 * If the letter entered is correct, the game moves on to the next letter or
 * terminates if this was the last letter.<br>
 * If the letter entered is incorrect, the game asks for the same letter again.<br>
 * Input and output is done in dialog and message boxes.<br>
 */

public class USStateCapitalTest {
	// The state and its capital
	private String capital = "OLYMPIA";

	private String state = "Washington";

	// The answer from the user
	private String answer = "_______"; // same length as capital. Initially all

	// underscores

	private int position = 0; // Current position of the letter to find.

	// Note: character indices start at 0 in a String

	// Do we need a constructor?
	// Answer no: All of the instance fields have been initialized on their
	// line of declaration.
	// In java, if there is no constructor in the class, a default (i.e. no
	// input
	// parameters) constructor that does nothing is automatically added to the
	// class.
	// That way, a user can instantiate the class.

	/**
	 * If the current answer is incomplete, <br>
	 * asks for the next letter in the name (via a dialog box). <br>
	 * Tells the player if the entry is correct or incorrect.<br>
	 * If correct, updates the current answer.
	 * <p>
	 * If the current answer is now complete, tells the player that the game is
	 * over and return true, otherwise return false.
	 */
	public boolean findNextLetter() {
		// For the input
		Input input = new Input();

		// The answer is complete: the game is over
		// Hint: the answer is complete when the position of the next letter
		// to find is beyond the end of the answer (recall that positions in
		// a String starts at 0).
		// Use JOptionPane.showMessageDialog to display the message
		if (position >= capital.length()) {
			JOptionPane.showMessageDialog(null,
					"You have found all of the letters", "Game over",
					JOptionPane.INFORMATION_MESSAGE);
			return true;
		}

		// Ask for and get the next letter
		// Use JOptionPane.showInputDialog
		char letter; // to receive the input
		letter = input.readCharDialog("What is the capital of the state of "
				+ state + "?\n" + answer + "\nEnter the next letter");

		// Make the input upper case
		// use the method toUpperCase from the String class
		letter = Character.toUpperCase(letter);

		// Is it the right character
		// (use the charAt method)
		if (letter == capital.charAt(position)) {
			// update the current answer
			// (use the substring method)
			answer = answer.substring(0, position) + letter
					+ answer.substring(position + 1);

			// update the position of the letter to find
			position = position + 1;
			// Message for the player: game over or move on to the next letter
			if (position >= capital.length()) {
				JOptionPane.showMessageDialog(null,
						"Congratulations, you have found all of the letters",
						"Game over", JOptionPane.INFORMATION_MESSAGE);
				return true;
			} else {
				JOptionPane.showMessageDialog(null,
						"Correct. Move on to the next letter", "Message",
						JOptionPane.INFORMATION_MESSAGE);
			}
		} else {
			// Wrong character
			JOptionPane.showMessageDialog(null, "Incorrect. Try again.",
					"Error", JOptionPane.ERROR_MESSAGE);
		}
		return false;
	}

	/**
	 * Starts the application
	 * 
	 * @param args
	 */
	public static void main(String[] args) {
		USStateCapitalTest test = new USStateCapitalTest();
		while (!test.findNextLetter()) {
		}
	}
}