package de.openms.knime.featureTextReader;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.List;

import org.knime.core.data.DataTableSpec;
import org.knime.core.data.uri.IURIPortObject;
import org.knime.core.data.uri.URIContent;
import org.knime.core.node.BufferedDataTable;
import org.knime.core.node.CanceledExecutionException;
import org.knime.core.node.ExecutionContext;
import org.knime.core.node.ExecutionMonitor;
import org.knime.core.node.InvalidSettingsException;
import org.knime.core.node.NodeLogger;
import org.knime.core.node.NodeModel;
import org.knime.core.node.NodeSettingsRO;
import org.knime.core.node.NodeSettingsWO;
import org.knime.core.node.port.PortObject;
import org.knime.core.node.port.PortObjectSpec;
import org.knime.core.node.port.PortType;

import de.openms.knime.TextExporterParser;

/**
 * This is the model implementation of FeatureTextReader. Reads files exported
 * b...
 * 
 * @author The OpenMS Team
 */
public class FeatureTextReaderNodeModel extends NodeModel {

    // the logger instance
    private static final NodeLogger logger = NodeLogger
            .getLogger(FeatureTextReaderNodeModel.class);

    /**
     * Constructor for the node model.
     */
    protected FeatureTextReaderNodeModel() {
        super(new PortType[] { new PortType(IURIPortObject.class) },
                new PortType[] { new PortType(BufferedDataTable.class) });
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected BufferedDataTable[] execute(final PortObject[] inObjects,
            final ExecutionContext exec) throws Exception {

        IURIPortObject obj = (IURIPortObject) inObjects[0];
        List<URIContent> uris = obj.getURIContents();
        if (uris.size() == 0) {
            throw new Exception(
                    "No URI was supplied in URIPortObject at input port 0");
        } else if (uris.size() != 1) {
            throw new Exception(String.format(
                    "We can only demangle a single file but got %d.",
                    uris.size()));
        }

        URI relURI = uris.get(0).getURI();
        File cXMLFile = new File(relURI);

        TextExporterParser parser = new TextExporterParser("FEATURE");
        BufferedDataTable out = parser.parseFile(cXMLFile, exec);

        return new BufferedDataTable[] { out };
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void reset() {
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected DataTableSpec[] configure(final PortObjectSpec[] inSpecs)
            throws InvalidSettingsException {
        return new DataTableSpec[] { null };
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void saveSettingsTo(final NodeSettingsWO settings) {
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void loadValidatedSettingsFrom(final NodeSettingsRO settings)
            throws InvalidSettingsException {
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void validateSettings(final NodeSettingsRO settings)
            throws InvalidSettingsException {
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void loadInternals(final File internDir,
            final ExecutionMonitor exec) throws IOException,
            CanceledExecutionException {
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void saveInternals(final File internDir,
            final ExecutionMonitor exec) throws IOException,
            CanceledExecutionException {
    }

}