/**
 * Copyright (c) 2012, Andy Janata
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 * 
 * * Redistributions of source code must retain the above copyright notice, this list of conditions
 *   and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright notice, this list of
 *   conditions and the following disclaimer in the documentation and/or other materials provided
 *   with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package net.socialgamer.cah.handlers;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpSession;

import net.socialgamer.cah.Constants.AjaxOperation;
import net.socialgamer.cah.Constants.AjaxRequest;
import net.socialgamer.cah.Constants.ErrorCode;
import net.socialgamer.cah.Constants.ReturnableData;
import net.socialgamer.cah.RequestWrapper;
import net.socialgamer.cah.data.Game;
import net.socialgamer.cah.data.Game.TooManyPlayersException;
import net.socialgamer.cah.data.GameManager;
import net.socialgamer.cah.data.User;

import com.google.inject.Inject;


/**
 * Handler to join a game.
 * 
 * @author Andy Janata (ajanata@socialgamer.net)
 */
public class JoinGameHandler extends GameHandler {

  public static final String OP = AjaxOperation.JOIN_GAME.toString();

  @Inject
  public JoinGameHandler(final GameManager gameManager) {
    super(gameManager);
  }

  @Override
  public Map<ReturnableData, Object> handle(final RequestWrapper request,
      final HttpSession session, final User user, final Game game) {
    final Map<ReturnableData, Object> data = new HashMap<ReturnableData, Object>();

    final String password = request.getParameter(AjaxRequest.PASSWORD);
    final String gamePassword = game.getPassword();
    if (gamePassword != null && !gamePassword.equals("")) {
      if (password == null || !gamePassword.equals(password)) {
        return error(ErrorCode.WRONG_PASSWORD);
      }
    }
    try {
      game.addPlayer(user);
    } catch (final IllegalStateException e) {
      return error(ErrorCode.CANNOT_JOIN_ANOTHER_GAME);
    } catch (final TooManyPlayersException e) {
      return error(ErrorCode.GAME_FULL);
    }
    return data;
  }
}