/**
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 *
 * Copyright 2012-2015 the original author or authors.
 */
package org.assertj.swing.util;

import java.awt.AWTException;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Robot;

import javax.annotation.Nonnull;

/**
 * Factory of AWT {@code Robot}s.
 * 
 * @author Alex Ruiz
 */
public class RobotFactory {
  /**
   * Creates a new AWT {@code Robot} object in the coordinate system of the primary screen.
   * 
   * @return the created {@code Robot}.
   * @throws AWTException if the platform configuration does not allow low-level input control. This exception is always
   *           thrown when {@code GraphicsEnvironment.isHeadless()} returns {@code true}.
   * @throws SecurityException if {@code createRobot} permission is not granted.
   */
  public @Nonnull Robot newRobotInPrimaryScreen() throws AWTException {
    return new Robot();
  }

  /**
   * Creates a new AWT {@code Robot} object in the coordinate system of the left screen (in terms of coordinates).
   * 
   * @return the created {@code Robot}.
   * @throws AWTException if the platform configuration does not allow low-level input control. This exception is always
   *           thrown when {@code GraphicsEnvironment.isHeadless()} returns {@code true}.
   * @throws SecurityException if {@code createRobot} permission is not granted.
   */
  public @Nonnull
  Robot newRobotInLeftScreen() throws AWTException {
    int lowestX = Integer.MAX_VALUE;
    GraphicsDevice lowestScreen = null;
    for (GraphicsDevice screen : GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()) {
      if (screen.getDefaultConfiguration().getBounds().x < lowestX) {
        lowestX = screen.getDefaultConfiguration().getBounds().x;
        lowestScreen = screen;
      }
    }
    return new Robot(lowestScreen);
  }
}