/*
 * Copyright (c) 2011, Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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 se.sics.mrm;

import java.awt.Color;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Point;

import org.apache.log4j.Logger;

import se.sics.cooja.ClassDescription;
import se.sics.cooja.Mote;
import se.sics.cooja.Simulation;
import se.sics.cooja.interfaces.Position;
import se.sics.cooja.interfaces.Radio;
import se.sics.cooja.plugins.Visualizer;
import se.sics.cooja.plugins.VisualizerSkin;
import se.sics.mrm.ChannelModel.RadioPair;
import se.sics.mrm.ChannelModel.TxPair;

@ClassDescription("Radio environment (MRM)")
public class MRMVisualizerSkin implements VisualizerSkin {
  private static Logger logger = Logger.getLogger(MRMVisualizerSkin.class);

  private Simulation simulation = null;
  private Visualizer visualizer = null;

  public void setActive(Simulation simulation, Visualizer vis) {
    if (!(simulation.getRadioMedium() instanceof MRM)) {
      logger.fatal("Cannot activate MRM skin for unknown radio medium: " + simulation.getRadioMedium());
      return;
    }
    this.simulation = simulation;
    this.visualizer = vis;
  }

  public void setInactive() {
    if (simulation == null) {
      /* Skin was never activated */
      return;
    }
  }

  public Color[] getColorOf(Mote mote) {
    Mote selectedMote = visualizer.getSelectedMote();
    if (mote == selectedMote) {
      return new Color[] { Color.CYAN };
    }
    return null;
  }

  public void paintBeforeMotes(Graphics g) {
    final Mote selectedMote = visualizer.getSelectedMote();
    if (simulation == null 
        || selectedMote == null
        || selectedMote.getInterfaces().getRadio() == null) {
      return;
    }
    final Position sPos = selectedMote.getInterfaces().getPosition();

    /* Paint transmission and interference range for selected mote */
    Position motePos = selectedMote.getInterfaces().getPosition();

    Point pixelCoord = visualizer.transformPositionToPixel(motePos);
    int x = pixelCoord.x;
    int y = pixelCoord.y;

    FontMetrics fm = g.getFontMetrics();
    g.setColor(Color.BLACK);

    MRM radioMedium = (MRM) simulation.getRadioMedium();

    /* Print transmission success probabilities */
    Mote[] dests = simulation.getMotes();
    if (dests == null || dests.length == 0) {
      String msg = "No edges";
      int msgWidth = fm.stringWidth(msg);
      g.setColor(Color.BLACK);
      g.drawString(msg, x - msgWidth/2, y + 2*Visualizer.MOTE_RADIUS + 3);
      return;
    }
    g.setColor(Color.BLACK);
    int edges = 0;
    for (Mote d: dests) {
      if (d == selectedMote) {
        continue;
      }
      final Radio dRadio = d.getInterfaces().getRadio();
      TxPair txPair = new RadioPair() {
        public Radio getFromRadio() {
          return selectedMote.getInterfaces().getRadio();
        }
        public Radio getToRadio() {
          return dRadio;
        }
      };
      double probArr[] = radioMedium.getChannelModel().getProbability(
          txPair,
          Double.NEGATIVE_INFINITY
      );
      double prob = probArr[0];
      double ss = probArr[1];

      if (prob == 0.0d) {
        continue;
      }
      edges++;
      String msg = String.format("%1.1f%%, %1.2fdB", 100.0*prob, ss);
      Point pixel = visualizer.transformPositionToPixel(d.getInterfaces().getPosition());
      int msgWidth = fm.stringWidth(msg);
      g.setColor(new Color(1-(float)prob, (float)prob, 0.0f));
      g.drawLine(x, y, pixel.x, pixel.y);
      g.setColor(Color.BLACK);
      g.drawString(msg, pixel.x - msgWidth/2, pixel.y + 2*Visualizer.MOTE_RADIUS + 3);
    }

    String msg = dests.length + " edges";
    int msgWidth = fm.stringWidth(msg);
    g.setColor(Color.BLACK);
    g.drawString(msg, x - msgWidth/2, y + 2*Visualizer.MOTE_RADIUS + 3);
  }

  public void paintAfterMotes(Graphics g) {
  }

  public Visualizer getVisualizer() {
    return visualizer;
  }
}