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/*******************************************************************************
 * Copyright (c) 2016 comtel inc.
 *
 * 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.
 *******************************************************************************/
package org.jfxvnc.swing.service;

import java.util.function.BiConsumer;

import org.jfxvnc.net.rfb.VncConnection;
import org.jfxvnc.net.rfb.codec.ProtocolState;
import org.jfxvnc.net.rfb.codec.decoder.BellEvent;
import org.jfxvnc.net.rfb.codec.decoder.ColourMapEvent;
import org.jfxvnc.net.rfb.codec.decoder.ServerCutTextEvent;
import org.jfxvnc.net.rfb.codec.decoder.ServerDecoderEvent;
import org.jfxvnc.net.rfb.codec.encoder.InputEventListener;
import org.jfxvnc.net.rfb.render.ConnectInfoEvent;
import org.jfxvnc.net.rfb.render.ProtocolConfiguration;
import org.jfxvnc.net.rfb.render.RenderCallback;
import org.jfxvnc.net.rfb.render.RenderProtocol;
import org.jfxvnc.net.rfb.render.rect.ImageRect;
import org.slf4j.LoggerFactory;

import javafx.beans.property.BooleanProperty;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.ReadOnlyBooleanProperty;
import javafx.beans.property.ReadOnlyBooleanWrapper;
import javafx.beans.property.ReadOnlyObjectProperty;
import javafx.beans.property.ReadOnlyObjectWrapper;
import javafx.beans.property.ReadOnlyStringProperty;
import javafx.beans.property.ReadOnlyStringWrapper;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleDoubleProperty;

public class VncRenderService implements RenderProtocol {

  private final static org.slf4j.Logger logger = LoggerFactory.getLogger(VncRenderService.class);

  private final VncConnection con;

  private BiConsumer eventConsumer;

  private final BooleanProperty listeningMode = new SimpleBooleanProperty(false);

  private final ReadOnlyBooleanWrapper online = new ReadOnlyBooleanWrapper(false);
  private final ReadOnlyBooleanWrapper bell = new ReadOnlyBooleanWrapper(false);
  private final ReadOnlyStringWrapper serverCutText = new ReadOnlyStringWrapper();

  private final ReadOnlyObjectWrapper connectInfo = new ReadOnlyObjectWrapper<>();
  private final ReadOnlyObjectWrapper protocolState = new ReadOnlyObjectWrapper<>(ProtocolState.CLOSED);
  private final ReadOnlyObjectWrapper inputEventListener = new ReadOnlyObjectWrapper<>();
  private final ReadOnlyObjectWrapper colourMapEvent = new ReadOnlyObjectWrapper<>();

  private final ReadOnlyObjectWrapper exceptionCaught = new ReadOnlyObjectWrapper<>();

  private ReadOnlyObjectWrapper image;

  private final double minZoomLevel = 0.2;
  private final double maxZoomLevel = 5.0;

  private final DoubleProperty zoomLevel = new SimpleDoubleProperty(1);
  private final BooleanProperty fullSceen = new SimpleBooleanProperty(false);
  private final BooleanProperty restart = new SimpleBooleanProperty(false);

  public VncRenderService() {
    this(new VncConnection());
  }

  public VncRenderService(VncConnection con) {
    this.con = con;
    zoomLevel.addListener((l, a, b) -> {
      if (b.doubleValue() > maxZoomLevel) {
        zoomLevel.set(maxZoomLevel);
      } else if (b.doubleValue() < minZoomLevel) {
        zoomLevel.set(minZoomLevel);
      }
    });

  }

  public void setEventConsumer(BiConsumer c) {
    eventConsumer = c;
  }

  public ProtocolConfiguration getConfiguration() {
    return con.getConfiguration();
  }

  public void connect() {
    con.setRenderProtocol(this);
    con.addFaultListener(exceptionCaught::set);

    if (listeningMode.get()) {
      con.startListeningMode().whenComplete((c, th) -> {
        if (th != null) {
          exceptionCaught(th);
          disconnect();
        }
      });
      return;
    }
    con.connect().whenComplete((c, th) -> {
      if (th != null) {
        exceptionCaught(th);
        disconnect();
      }
    });
  }

  public void disconnect() {
    con.disconnect();
    online.set(false);
  }

  @Override
  public void render(ImageRect rect, RenderCallback callback) {
    if (eventConsumer != null) {
      eventConsumer.accept(null, rect);
    }
    if (image != null) {
      image.set(rect);
    }
    callback.renderComplete();
  }

  @Override
  public void eventReceived(ServerDecoderEvent event) {
    logger.debug("event received: {}", event);
    
    if (eventConsumer != null) {
      eventConsumer.accept(event, null);
    }
    
    if (event instanceof ConnectInfoEvent) {
      connectInfo.set((ConnectInfoEvent) event);
      online.set(true);
      return;
    }
    if (event instanceof BellEvent) {
      bell.set(!bell.get());
      return;
    }
    if (event instanceof ServerCutTextEvent) {
      serverCutText.set(((ServerCutTextEvent) event).getText());
      return;
    }
    if (event instanceof ColourMapEvent) {
      colourMapEvent.set((ColourMapEvent) event);
      return;
    }

    logger.warn("not handled event: {}", event);
  }

  @Override
  public void exceptionCaught(Throwable t) {
    exceptionCaught.set(t);
  }

  @Override
  public void stateChanged(ProtocolState state) {
    protocolState.set(state);
    if (state == ProtocolState.CLOSED) {
      disconnect();
    }
  }

  @Override
  public void registerInputEventListener(InputEventListener listener) {
    inputEventListener.set(listener);
  }

  public ReadOnlyObjectProperty connectInfoProperty() {
    return connectInfo.getReadOnlyProperty();
  }

  public ReadOnlyObjectProperty protocolStateProperty() {
    return protocolState;
  }

  public ReadOnlyObjectProperty inputEventListenerProperty() {
    return inputEventListener.getReadOnlyProperty();
  }

  public ReadOnlyObjectProperty imageProperty() {
    if (image == null) {
      image = new ReadOnlyObjectWrapper<>();
    }
    return image.getReadOnlyProperty();
  }

  public ReadOnlyObjectProperty colourMapEventProperty() {
    return colourMapEvent.getReadOnlyProperty();
  }

  public ReadOnlyObjectProperty exceptionCaughtProperty() {
    return exceptionCaught.getReadOnlyProperty();
  }

  public ReadOnlyBooleanProperty connectingProperty() {
    return con.connectingProperty();
  }

  public ReadOnlyBooleanProperty connectedProperty() {
    return con.connectedProperty();
  }
  
  public ReadOnlyBooleanProperty onlineProperty() {
    return online.getReadOnlyProperty();
  }

  public ReadOnlyBooleanProperty bellProperty() {
    return bell.getReadOnlyProperty();
  }

  public ReadOnlyStringProperty serverCutTextProperty() {
    return serverCutText.getReadOnlyProperty();
  }

  public DoubleProperty zoomLevelProperty() {
    return zoomLevel;
  }

  public BooleanProperty fullSceenProperty() {
    return fullSceen;
  }

  public BooleanProperty restartProperty() {
    return restart;
  }

  public BooleanProperty listeningModeProperty() {
    return listeningMode;
  }

  public IntegerProperty listeningPortProperty() {
    return getConfiguration().listeningPortProperty();
  }
}