package net.sourceforge.fenixedu.presentationTier.renderers.providers;

import java.util.Set;
import java.util.TreeSet;

import net.sourceforge.fenixedu.domain.CurricularCourse;
import net.sourceforge.fenixedu.domain.DegreeCurricularPlan;
import net.sourceforge.fenixedu.domain.ExecutionDegree;
import net.sourceforge.fenixedu.domain.ExecutionYear;
import net.sourceforge.fenixedu.domain.degreeStructure.CurricularCourseFunctor;
import net.sourceforge.fenixedu.domain.interfaces.HasExecutionYear;
import net.sourceforge.fenixedu.presentationTier.renderers.converters.DomainObjectKeyConverter;
import pt.ist.fenixWebFramework.renderers.DataProvider;
import pt.ist.fenixWebFramework.renderers.components.converters.Converter;

public class ExecutionDegreesWithDissertationByExecutionYearProvider implements DataProvider {

    private static class HasDissertationPredicate implements CurricularCourseFunctor {

	boolean hasDissertation = false;

	public void doWith(final CurricularCourse curricularCourse) {
	    if (curricularCourse.isDissertation()) {
		hasDissertation = true;
	    }
	}

	public boolean keepDoing() {
	    return !hasDissertation;
	}

    }

    public Object provide(Object source, Object currentValue) {
	final HasExecutionYear hasExecutionYear = (HasExecutionYear) source;
	final Set<ExecutionDegree> executionDegrees = new TreeSet<ExecutionDegree>(
		ExecutionDegree.EXECUTION_DEGREE_COMPARATORY_BY_DEGREE_TYPE_AND_NAME);
	final ExecutionYear executionYear = hasExecutionYear.getExecutionYear();
	if (executionYear != null) {
	    for (final ExecutionDegree executionDegree : executionYear.getExecutionDegreesSet()) {
		if (!executionDegree.getDegreeCurricularPlan().isEmpty() && hasDissertation(executionDegree)) {
		    executionDegrees.add(executionDegree);
		}
	    }
	}
	return executionDegrees;
    }

    private boolean hasDissertation(final ExecutionDegree executionDegree) {
	final DegreeCurricularPlan degreeCurricularPlan = executionDegree.getDegreeCurricularPlan();
	final HasDissertationPredicate hasDissertationPredicate = new HasDissertationPredicate();
	degreeCurricularPlan.doForAllCurricularCourses(hasDissertationPredicate);
	return hasDissertationPredicate.hasDissertation;
    }

    public Converter getConverter() {
	return new DomainObjectKeyConverter();
    }

}