package net.sourceforge.fenixedu.presentationTier.renderers;

import net.sourceforge.fenixedu.domain.tests.TestsGrade;
import pt.ist.fenixWebFramework.renderers.InputRenderer;
import pt.ist.fenixWebFramework.renderers.components.HtmlComponent;
import pt.ist.fenixWebFramework.renderers.components.HtmlHiddenField;
import pt.ist.fenixWebFramework.renderers.components.HtmlInlineContainer;
import pt.ist.fenixWebFramework.renderers.components.HtmlText;
import pt.ist.fenixWebFramework.renderers.components.HtmlTextInput;
import pt.ist.fenixWebFramework.renderers.components.controllers.HtmlController;
import pt.ist.fenixWebFramework.renderers.components.converters.ConversionException;
import pt.ist.fenixWebFramework.renderers.components.converters.Converter;
import pt.ist.fenixWebFramework.renderers.components.state.IViewState;
import pt.ist.fenixWebFramework.renderers.layouts.Layout;
import pt.ist.fenixWebFramework.renderers.model.MetaSlot;

public class TestGradeInputRenderer extends InputRenderer {
    private String fieldWidth;

    public String getFieldWidth() {
	return fieldWidth;
    }

    /**
     * This property allows to specify the width of each input field (value and
     * scale).
     * 
     * @property
     */
    public void setFieldWidth(String fieldWidth) {
	this.fieldWidth = fieldWidth;
    }

    public class GradeInputLayout extends Layout {

	@Override
	public HtmlComponent createComponent(Object object, Class type) {
	    HtmlInlineContainer container = new HtmlInlineContainer();

	    MetaSlot slot = (MetaSlot) getInputContext().getMetaObject();
	    final HtmlHiddenField hiddenField = new HtmlHiddenField();
	    hiddenField.bind(slot);

	    final HtmlTextInput value = new HtmlTextInput();
	    value.setName(slot.getKey().toString() + "_value");
	    value.setSize(getFieldWidth());
	    final HtmlTextInput scale = new HtmlTextInput();
	    scale.setName(slot.getKey().toString() + "_scale");
	    scale.setSize(getFieldWidth());

	    hiddenField.setController(new HtmlController() {
		@Override
		public void execute(IViewState viewState) {
		    hiddenField.setValue(value.getValue() + "|" + scale.getValue());
		}
	    });

	    hiddenField.setConverter(new Converter() {
		@Override
		public Object convert(Class type, Object inValue) {
		    String input = (String) inValue;

		    if (input == null || input.length() == 0) {
			return null;
		    }

		    try {
			String[] parts = input.split("\\|");
			double value = Double.parseDouble(parts[0]);
			double scale = Double.parseDouble(parts[1]);

			return new TestsGrade(value, scale);
		    } catch (NumberFormatException e) {
			throw new ConversionException("fenix.renderers.converter.grade.invalid", e);
		    } catch (IndexOutOfBoundsException e) {
			throw new ConversionException("fenix.renderers.converter.grade.invalid", e);
		    }
		}
	    });

	    container.addChild(hiddenField);
	    container.addChild(value);
	    container.addChild(new HtmlText("/"));
	    container.addChild(scale);

	    return container;
	}

    }

    public TestGradeInputRenderer() {
	super();
    }

    @Override
    protected Layout getLayout(Object object, Class type) {
	return new GradeInputLayout();
    }

}