/*
 * cubeWorker.java
 *
 * Copyright 2011 Thomas Buck <xythobuz@me.com>
 * Copyright 2011 Max Nuding <max.nuding@gmail.com>
 * Copyright 2011 Felix Bäder <baeder.felix@gmail.com>
 *
 * This file is part of LED-Cube.
 *
 * LED-Cube is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * LED-Cube is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with LED-Cube.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * This class handles one animation file. This file can contain
 * many animations, but has to be only 1Mbit in size (128*1024 Byte).
 */
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import java.util.Collections;

/**
 * This class holds all Data of the Application. Additionally it performs the
 * transmission of animation data to/from the cube and saves/loads animations
 * in/from a file.
 * 
 * @author Thomas Buck
 * @author Felix Bäder
 * @author Max Nuding
 * @version 1.0
 */

public class cubeWorker {

	// --------------------
	// Definitions
	// --------------------

	final int UP = 0;
	final int DOWN = 1;

	// --------------------
	// Fields
	// --------------------

	private List<Animation> animations = new ArrayList<Animation>();
	private final int framesRemaining = 2016; // (128 * 1024) / 65 = 2016,...
	private boolean changedState = false;
	private Frame parentFrame;

	// --------------------

	/**
	 * Creates a worker with one animation, containing an empty frame.
	 */
	public cubeWorker(Frame parent) {
		animations.add(new Animation());
		animations.get(0).setName("Animation 1");
		animations.get(0).add(0);
		animations.get(0).get(0).setName("Frame 1");
		parentFrame = parent;
	}

	/**
	 * Creates a worker from the given animation list
	 * 
	 * @param anims List of animations
	 */
	public cubeWorker(List<Animation> anims, Frame parent) {
		animations = anims;
		parentFrame = parent;
	}

	/**
	 * Returns number of frames in this cubeWorker.
	 *
	 * @return number of frames.
	 */
	public int completeNumOfFrames() {
		int count = 0;
		for (int i = 0; i < numOfAnimations(); i++) {
			count += numOfFrames(i);
		}
		return count;
	}

	// --------------------
	// Misc. Methods
	// --------------------

	// Returns a number that is below the size of the animations list and not used as order
	// If a order is higher or equal to the size of the list, it tries to assign a hole found to this
	// Returns -1 if there is no hole
	private int holeInAnimationList() {
		int s = animations.size();
		byte[] result = new byte[s];
		int hole = -1;
		int fix = -1;
		for (int i = 0; i < s; i++) {
			result[i] = 0;
		}
		for (int i = 0; i < s; i++) {
			int order = animations.get(i).getOrder();
			if (order >= s) {
				// Houston, we have a problem...
				fix = i;
			}
			result[order] = 1;
		}
		for (int i = 0; i < s; i++) {
			if (result[i] == 0) {
				hole = i;
				break;
			}
		}
		if ((hole != -1) && (fix != 1)) {
			animations.get(fix).setOrder(hole);
			return holeInAnimationList();
		}
		return hole;
	}

	// return true if damaged and to be sorted
	private boolean checkAnimationList() {
		for (int i = 0; i < animations.size(); i++) {
			if (animations.get(i).getOrder() != i) {
				int h = holeInAnimationList();
				if (h != -1) {
					animations.get(i).setOrder(h);
				}
				return true;
			}
		}
		return false;
	}

	/**
	 * Get the number of animations in this worker.
	 * Also fixes the order of the animation list, if needed.
	 * 
	 * @return number of animations
	 */
	public int numOfAnimations() {
		while(checkAnimationList()) {
			Collections.sort(animations);
		}
		return animations.size();
	}

	/**
	 * Get the number of frames in an animation.
	 * 
	 * @param selectedAnimation the animation you want to check
	 * @return number of frames in this animation
	 */
	public int numOfFrames(int selectedAnimation) {
		return animations.get(selectedAnimation).size();
	}

	/**
	 * Get the number of frames you can add until the Cubes memory is full.
	 * 
	 * @return number of frames remaining
	 */
	public int framesRemaining() {
		return framesRemaining - completeNumOfFrames();
	}

	// --------------------
	// Animation Specific
	// --------------------

	/**
	 * Add an animation. It has an initial empty frame
	 * 
	 * @return Index of new animation, or -1 if not enough space remaining.
	 */
	public int addAnimation() {
		changedState = true;
		if (framesRemaining() <= 0) {
			return -1;
		} else {
			int s = animations.size();
			animations.add(s, new Animation());
			animations.get(s).setName("Animation " + animations.size());
			animations.get(s).add(0, new AFrame());
			animations.get(s).get(0).setName("Frame 1");
			return s;
		}
	}

	/**
	 * Remove an animation.
	 * 
	 * @param selectedAnimation the animation you want to delete
	 */
	public void removeAnimation(int selectedAnimation) {
		changedState = true;
		animations.remove(selectedAnimation);
	}

	/**
	 * Get the name of an animation
	 * 
	 * @return The name
	 * @param selectedAnimation The animation you want to get the name from
	 */
	public String getAnimationName(int selectedAnimation) {
		return animations.get(selectedAnimation).getName();
	}

	/**
	 * Set the name of an animation  @param s New name
	 * 
	 * @param selectedAnimation Index of the animation you want to change
	 */
	public void setAnimationName(String s, int selectedAnimation) {
		changedState = true;
		animations.get(selectedAnimation).setName(s);
	}

	/**
	 * Move an animation UP or DOWN.
	 * 
	 * @param dir Direction. Use UP and DOWN defined in cubeWorker
	 * @param selectedAnimation Animation you want to move
	 */
	public void moveAnimation(int dir, int selectedAnimation) {
		changedState = true;
		if (dir == UP) {
			// animation moved up
			if (selectedAnimation > 0) {
				Animation tmp = animations.get(selectedAnimation);
				animations.set(selectedAnimation,
						animations.get(selectedAnimation - 1));
				animations.set(selectedAnimation - 1, tmp);
			}
		} else if (dir == DOWN) {
			// animation moved down
			if (selectedAnimation < (animations.size() - 1)) {
				Animation tmp = animations.get(selectedAnimation);
				animations.set(selectedAnimation,
						animations.get(selectedAnimation + 1));
				animations.set(selectedAnimation + 1, tmp);
			}
		}
	}

	// --------------------
	// Frame Specific
	// --------------------

	/**
	 * Get the name of a frame.
	 * 
	 * @param anim Animation the frame is in
	 * @param frame Index of the frame
	 */
	public String getFrameName(int anim, int frame) {
		return animations.get(anim).get(frame).getName();
	}

	/**
	 * Set the name of a frame.
	 * 
	 * @param s New name
	 * @param anim Animation Index
	 * @param frame Frame Index
	 */
	public void setFrameName(String s, int anim, int frame) {
		changedState = true;
		animations.get(anim).get(frame).setName(s);
	}

	/**
	 * Add a Frame to an animation.
	 * 
	 * @return Index of new Frame or -1 if not enough space
	 * @param anim Animation Index
	 */
	public int addFrame(int anim) {
		changedState = true;
		if (framesRemaining() <= 0) {
			return -1;
		}
		int s = animations.get(anim).size();
		animations.get(anim).add(s);
		animations.get(anim).get(s)
				.setName("Frame " + animations.get(anim).size());
		return s;
	}

	/**
	 * Remove a frame.
	 * 
	 * @param anim Animation Index
	 * @param frame Frame you want to remove
	 */
	public void removeFrame(int anim, int frame) {
		changedState = true;
		animations.get(anim).remove(frame);
	}

	/**
	 * Get the data of a frame.
	 * 
	 * @param anim Animation Index  @param frame Frame Index
	 * @return 64 byte array with data (8 bits per byte => 512 bits)
	 */
	public short[] getFrame(int anim, int frame) {
		return animations.get(anim).get(frame).getData();
	}

	/**
	 * Set the data of a frame
	 * 
	 * @param data 64 byte array with data
	 * @param anim Animation Index
	 * @param frame Frame Index
	 * @see cubeWorker#getFrame(int, int) getFrame()
	 */
	public void setFrame(short[] data, int anim, int frame) {
		changedState = true;
		animations.get(anim).get(frame).setData(data);
	}

	/**
	 * Get frame duration.
	 * 
	 * @param anim Animation Index
	 * @param frame Frame Index
	 * @return Duration. 0 means 1/24th of a second.
	 */
	public short getFrameTime(int anim, int frame) {
		return animations.get(anim).get(frame).getTime();
	}

	/**
	 * Set the frames duration.
	 * 
	 * @param time New duration
	 * @param anim Animation Index
	 * @param frame Frame Index
	 * @see cubeWorker#getFrameTime(int, int) getFrameTime()
	 */
	public void setFrameTime(short time, int anim, int frame) {
		changedState = true;
		animations.get(anim).get(frame).setTime(time);
	}

	/**
	 * Move a frame.
	 * 
	 * @param dir Direction to move. Use UP and DOWN from cubeWorker
	 * @param anim Animation Index
	 * @param frame Frame Index
	 * @see cubeWorker#moveAnimation(int, int) moveAnimation()
	 */
	public void moveFrame(int dir, int anim, int frame) {
		changedState = true;
		if (dir == UP) {
			// frame moved up
			if (frame > 0) {
				AFrame tmp = animations.get(anim).frames.get(frame);
				animations.get(anim).frames.set(frame,
						animations.get(anim).frames.get(frame - 1));
				animations.get(anim).frames.set(frame - 1, tmp);
			}
		} else if (dir == DOWN) {
			// frame moved down
			if (frame < (animations.get(anim).size() - 1)) {
				AFrame tmp = animations.get(anim).frames.get(frame);
				animations.get(anim).frames.set(frame,
						animations.get(anim).frames.get(frame + 1));
				animations.get(anim).frames.set(frame + 1, tmp);
			}
		}
	}

	// --------------------
	// File Specific
	// --------------------

	/**
	 * Loads an animation file into this worker.
	 * 
	 * @param path Path of file to load
	 * @return 0 on success, -1 on error.
	 */
	public int loadState(String path) {
		changedState = false;
		try {
			animations = AnimationUtility.readFile(path);
		} catch (Exception e) {
			System.out.println("Did not load!");
			e.printStackTrace(System.out);
			return -1;
		}
		int size = 0;
		for (int i = 0; i < animations.size(); i++) {
			size += animations.get(i).size();
		}
		if (size > framesRemaining) {
			return -1;
		}
		return 0;
	}

	/**
	 * Save the state of this object into a file.
	 * 
	 * @param path Path to save file in
	 * @return 0 on success, -1 on error
	 */
	public int saveState(String path) {
		changedState = false;
		AnimationUtility.writeFile(path, animations);
		if (AnimationUtility.getLastError() != null) {
			System.out.println(AnimationUtility.getLastError());
			return -1;
		}
		return 0;
	}

	/**
	 * Check if something changed after loading/saving.
	 * 
	 * @return TRUE if something changed, FALSE otherwise
	 */
	public boolean changedStateSinceSave() {
		return changedState;
	}

	// --------------------
	// Serial Port Specific
	// --------------------

	/**
	 * Send all animations to the cube.
	 * 
	 * @param port Name of serial port to use
	 * @return 0 on success, -1 on error
	 */
	public int uploadState(String port) {
		try {
			SerialHelper sh = new SerialHelper(port, parentFrame);
			int ret = sh.sendAnimationsToCube(this);
			sh.closeSerialPort();
			return ret;
		} catch (Exception e) {
			return -1;
		}
	}

	/**
	 * Get all animations from the cube, place it in this object
	 * 
	 * @param port Name of serial port to use
	 * @return 0 on success, -1 on error
	 */
	public int downloadState(String port) {
		try {
			SerialHelper sh = new SerialHelper(port, parentFrame);
			cubeWorker ret = sh.getAnimationsFromCube();
			sh.closeSerialPort();
			if (ret == null) {
				return -1;
			} else {
				changedState = true;
				animations = ret.getAnimationList();
				return 0;
			}
		} catch (Exception e) {
			return -1;
		}
	}

	/**
	 * Get the list used internally to store all the animations.
	 * @return The list.
	 */
	public List<Animation> getAnimationList() {
		return animations;
	}

	/**
	 * Try to speak with the cube.
	 * 
	 * @return TRUE if cube responds
	 * @param port Name of serial port
	 */
	public boolean probeCubeConnected(String port) {
		try {
			SerialHelper sh = new SerialHelper(port, parentFrame);
			boolean response = sh.probeForCube();
			sh.closeSerialPort();
			return response;
		} catch (Exception e) {
			return false;
		}
	}

	/**
	 * Get the names of all available serial ports.
	 * 
	 * @return Array of port names. First entry is "Select serial port..." if no
	 *         others
	 */
	public String[] getSerialPorts() {
		String[] ports = { "Select serial port..." };
		String portLines = HelperUtility.getPorts();
		if (portLines == null) {
			return ports;
		}
		StringTokenizer sT = new StringTokenizer(portLines, "\n");
		int size = sT.countTokens();
		ports = new String[size];
		for (int i = 0; i < size; i++) {
			ports[i] = sT.nextToken();
		}
		return ports;
	}

	// --------------------

}