/*
 * Created on 2007 feb 8
 */
package lab4.data;

import java.util.Observable;
import java.util.Observer;

import lab4.client.GomokuClient;

/**
 * Represents the state of a game
 */

public class GomokuGameState extends Observable implements Observer{

   // Game variables
	private final int DEFAULT_SIZE = 15;
	private GameGrid gameGrid;

    //Possible game states
	private final int NOT_STARTED = 0,MY_TURN = 1,OTHER_TURN = 2,FINISHED = 3;
	private int currentState;

	private GomokuClient client;

	private String message;

	/**
	 * The constructor
	 *
	 * @param gc The client used to communicate with the other player
	 */
	public GomokuGameState(GomokuClient gc){
		client = gc;
		client.addObserver(this);
		gc.setGameState(this);
		currentState = NOT_STARTED;
		gameGrid = new GameGrid(DEFAULT_SIZE);
	}


	/**
	 * Returns the message string
	 *
	 * @return the message string
	 */
	public String getMessageString(){
		return message;
	}

	/**
	 * Returns the game grid
	 *
	 * @return the game grid
	 */
	public GameGrid getGameGrid(){
		return gameGrid;
	}

	/**
	 * This player makes a move at a specified location
	 *
	 * @param x the x coordinate
	 * @param y the y coordinate
	 */
	public void move(int x, int y){
		if (currentState == MY_TURN) {
			if (gameGrid.move(x,y,MY_TURN)) {
				message = "moved the boi";
				client.sendMoveMessage(x,y);
				if (gameGrid.isWinner(MY_TURN)) {
					currentState = FINISHED;
				}
			} else {
				message = "error";
			}
			setChanged();
			notifyObservers();
		}
	}

	/**
	 * Starts a new game with the current client
	 */
	public void newGame(){
		gameGrid.clearGrid();
		currentState = OTHER_TURN;
		message = "NEW GAME STARTED BY YOU";
		setChanged();
		notifyObservers();
	}

	/**
	 * Other player has requested a new game, so the
	 * game state is changed accordingly
	 */
	public void receivedNewGame(){
		gameGrid.clearGrid();
		currentState = MY_TURN;
		message = "NEW GAME STARTED BY OTHER";
		client.sendNewGameMessage();
		setChanged();
		notifyObservers();
	}

	/**
	 * The connection to the other player is lost,
	 * so the game is interrupted
	 */
	public void otherGuyLeft(){
		gameGrid.clearGrid();
		currentState = FINISHED;
		message = "other guy disconnected";
		setChanged();
		notifyObservers();
	}

	/**
	 * The player disconnects from the client
	 */
	public void disconnect(){
		gameGrid.clearGrid();
		currentState = FINISHED;
		message = "disconnected";
		client.disconnect();
		setChanged();
		notifyObservers();
	}

	/**
	 * The player receives a move from the other player
	 *
	 * @param x The x coordinate of the move
	 * @param y The y coordinate of the move
	 */
	public void receivedMove(int x, int y){
		message = "opponent moved the boi";
		client.sendMoveMessage(x,y);
		if (gameGrid.isWinner(OTHER_TURN)) {
			currentState = FINISHED;
		}
		setChanged();
		notifyObservers();
	}

	public void update(Observable o, Object arg) {

		switch(client.getConnectionStatus()){
		case GomokuClient.CLIENT:
			message = "Game started, it is your turn!";
			currentState = MY_TURN;
			break;
		case GomokuClient.SERVER:
			message = "Game started, waiting for other player...";
			currentState = OTHER_TURN;
			break;
		}
		setChanged();
		notifyObservers();


	}

}