/**
 *
 */
package net.sf.taverna.t2.workbench.loop;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

import org.apache.log4j.Logger;

import com.fasterxml.jackson.databind.node.ObjectNode;

import uk.org.taverna.configuration.app.ApplicationConfiguration;
import uk.org.taverna.scufl2.api.core.Processor;
import uk.org.taverna.scufl2.api.profiles.Profile;

import net.sf.taverna.t2.workbench.edits.EditManager;
import net.sf.taverna.t2.workbench.file.FileManager;
import net.sf.taverna.t2.workbench.helper.HelpEnabledDialog;

/**
 * @author Alan R Williams
 * @author Stian Soiland-Reyes
 *
 */
@SuppressWarnings("serial")
public class LoopConfigureAction extends AbstractAction {

	private static Logger logger = Logger.getLogger(LoopConfigureAction.class);

	private final EditManager editManager;
	private final FileManager fileManager;

	private final Frame owner;
	private final ObjectNode loopLayer;
	private final LoopContextualView contextualView;
	private final Processor processor;
    private final Profile profile;

    private ApplicationConfiguration applicationConfig;


    protected LoopConfigureAction(Frame owner,
            LoopContextualView contextualView, Processor processor,
            ObjectNode loopLayer, Profile profile, EditManager editManager,
            FileManager fileManager, ApplicationConfiguration applicationConfig) {
		super("Configure");
		this.owner = owner;
		this.contextualView = contextualView;
		this.loopLayer = loopLayer;
        this.profile = profile;
		this.editManager = editManager;
		this.fileManager = fileManager;
		this.processor = processor;
        this.applicationConfig = applicationConfig;
	}

	public void actionPerformed(ActionEvent e) {
		String title = "Looping for service " + processor.getName();
		final JDialog dialog = new HelpEnabledDialog(owner, title, true);
        LoopConfigurationPanel loopConfigurationPanel = new LoopConfigurationPanel(
                processor, loopLayer, profile, applicationConfig);
		dialog.add(loopConfigurationPanel, BorderLayout.CENTER);

		JPanel buttonPanel = new JPanel();
		buttonPanel.setLayout(new FlowLayout());

		JButton okButton = new JButton(new OKAction(dialog, loopConfigurationPanel));
		buttonPanel.add(okButton);

		JButton resetButton = new JButton(new ResetAction(loopConfigurationPanel));
		buttonPanel.add(resetButton);

		JButton cancelButton = new JButton(new CancelAction(dialog));
		buttonPanel.add(cancelButton);

		dialog.add(buttonPanel, BorderLayout.SOUTH);
		dialog.pack();
		dialog.setSize(650, 430);
		dialog.setLocationRelativeTo(null);
		dialog.setVisible(true);
	}

	protected class CancelAction extends AbstractAction {
		private final JDialog dialog;

		protected CancelAction(JDialog dialog) {
			super("Cancel");
			this.dialog = dialog;
		}

		public void actionPerformed(ActionEvent e) {
			dialog.setVisible(false);
			if (contextualView != null) {
				contextualView.refreshView();
			}
		}

	}

	protected class OKAction extends AbstractAction {
		private final JDialog dialog;
		private final LoopConfigurationPanel loopConfigurationPanel;

		protected OKAction(JDialog dialog, LoopConfigurationPanel loopConfigurationPanel) {
			super("OK");
			this.dialog = dialog;
			this.loopConfigurationPanel = loopConfigurationPanel;
		}

		public void actionPerformed(ActionEvent e) {
			try {

				List<Edit<?>> compoundEdit = new ArrayList<Edit<?>>();
				LoopConfiguration configuration = loopConfigurationPanel.getConfiguration();
				compoundEdit.add(edits.getConfigureEdit(loopLayer, configuration));
				compoundEdit.addAll(checkPortMappings(configuration.getCondition()));

				editManager.doDataflowEdit(fileManager.getCurrentDataflow(), new CompoundEdit(
						compoundEdit));
				dialog.setVisible(false);
				if (contextualView != null) {
					contextualView.refreshView();
				}
			} catch (RuntimeException ex) {
				logger.warn("Could not configure looping", ex);
				JOptionPane.showMessageDialog(owner, "Could not configure looping",
						"An error occured when configuring looping: " + ex.getMessage(),
						JOptionPane.ERROR_MESSAGE);
			} catch (EditException ex) {
				logger.warn("Could not configure looping", ex);
				JOptionPane.showMessageDialog(owner, "Could not configure looping",
						"An error occured when configuring looping: " + ex.getMessage(),
						JOptionPane.ERROR_MESSAGE);
			}
		}

		protected List<Edit<?>> checkPortMappings(Activity<?> conditionActivity) {

			List<Edit<?>> compoundEdit = new ArrayList<Edit<?>>();
			if (processor.getActivityList().isEmpty()) {
				return compoundEdit;
			}
			Set<String> newInputs = new HashSet<String>();
			Set<String> newOutputs = new HashSet<String>();

			Activity<?> firstProcessorActivity;
			firstProcessorActivity = processor.getActivityList().get(0);
			if (conditionActivity != null) {
				for (OutputPort condOutPort : conditionActivity.getOutputPorts()) {
					String portName = condOutPort.getName();
					Map<String, String> mapping = firstProcessorActivity.getInputPortMapping();
					if (!mapping.containsKey(portName)) {
						if (mapping.containsKey(portName)) {
							logger.warn("Can't re-map input for " + "conditional output "
									+ portName);
						}
						for (InputPort inputPort : firstProcessorActivity.getInputPorts()) {
							if (inputPort.equals(portName)) {
								Edit<Activity<?>> edit = edits.getAddActivityInputPortMappingEdit(
										firstProcessorActivity, portName, portName);
								compoundEdit.add(edit);
								newInputs.add(portName);
							}
						}
					}
				}
				for (InputPort condInPort : conditionActivity.getInputPorts()) {
					String portName = condInPort.getName();
					Map<String, String> mapping = firstProcessorActivity.getOutputPortMapping();
					if (!mapping.containsValue(portName)) {
						for (OutputPort outputPort : firstProcessorActivity.getOutputPorts()) {
							if (outputPort.equals(portName)) {
								if (mapping.containsKey(portName)) {
									logger.warn("Can't re-map output for " + "conditional input "
											+ portName);
								}
								Edit<Activity<?>> edit = edits.getAddActivityOutputPortMappingEdit(
										firstProcessorActivity, portName, portName);
								logger.info("Mapping for conditional non-outgoing activity port binding "
										+ portName);
								compoundEdit.add(edit);
								newOutputs.add(portName);
							}
						}
					}
				}
			}
			// Remove any stale bindings that no longer match neither
			// conditional activity or the processor output ports
			for (String processorIn : firstProcessorActivity.getInputPortMapping().keySet()) {
				if (newInputs.contains(processorIn)) {
					continue;
				}
				boolean foundMatch = false;
				for (InputPort processorPort : processor.getInputPorts()) {
					if (processorPort.getName().equals(processorIn)) {
						foundMatch = true;
						break;
					}
				}
				if (!foundMatch) {
					Edit<Activity<?>> edit = edits.getRemoveActivityInputPortMappingEdit(
							firstProcessorActivity, processorIn);
					logger.info("Removing stale input port binding " + processorIn);
					compoundEdit.add(edit);
				}
			}
			for (String processorOut : firstProcessorActivity.getOutputPortMapping().keySet()) {
				if (newInputs.contains(processorOut)) {
					continue;
				}
				boolean foundMatch = false;
				for (OutputPort processorPort : processor.getOutputPorts()) {
					if (processorPort.getName().equals(processorOut)) {
						foundMatch = true;
						break;
					}
				}
				if (!foundMatch) {
					Edit<Activity<?>> edit = edits.getRemoveActivityOutputPortMappingEdit(
							firstProcessorActivity, processorOut);
					logger.info("Removing stale output port binding " + processorOut);
					compoundEdit.add(edit);
				}
			}

			return compoundEdit;
		}
	}

	protected class ResetAction extends AbstractAction {
		private LoopConfigurationPanel loopConfigurationPanel;

		protected ResetAction(LoopConfigurationPanel loopConfigurationPanel) {
			super("Reset");
			this.loopConfigurationPanel = loopConfigurationPanel;
		}

		public void actionPerformed(ActionEvent e) {
			if (contextualView != null) {
				contextualView.refreshView();
			}
			loopConfigurationPanel.setConfiguration(loopLayer.getConfiguration());
		}

	}

}