package net.sourceforge.fenixedu.presentationTier.Action.vigilancy;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sourceforge.fenixedu.applicationTier.Servico.person.vigilancy.AddExecutionCourseToGroup;
import net.sourceforge.fenixedu.applicationTier.Servico.person.vigilancy.RemoveExecutionCoursesFromGroup;
import net.sourceforge.fenixedu.domain.Department;
import net.sourceforge.fenixedu.domain.ExecutionCourse;
import net.sourceforge.fenixedu.domain.RootDomainObject;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.domain.organizationalStructure.ScientificAreaUnit;
import net.sourceforge.fenixedu.domain.organizationalStructure.Unit;
import net.sourceforge.fenixedu.domain.vigilancy.VigilantGroup;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixDispatchAction;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import pt.ist.fenixWebFramework.renderers.components.state.IViewState;
import pt.ist.fenixWebFramework.renderers.utils.RenderUtils;

public class VigilancyCourseGroupManagement extends FenixDispatchAction {

    public ActionForward prepareEdition(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	VigilancyCourseGroupBean bean = new VigilancyCourseGroupBean();
	String oid = request.getParameter("gid");
	Integer idInternal = Integer.valueOf(oid);

	VigilantGroup group = (VigilantGroup) RootDomainObject.readDomainObjectByOID(VigilantGroup.class, idInternal);
	bean.setSelectedVigilantGroup(group);
	bean.setSelectedDepartment(getDepartment(group));
	request.setAttribute("bean", bean);

	return mapping.findForward("editCourseGroup");
    }

    private Department getDepartment(VigilantGroup group) {
	Unit unit = group.getUnit();
	if (unit.isDepartmentUnit()) {
	    return unit.getDepartment();
	}
	if (unit.isScientificAreaUnit()) {
	    ScientificAreaUnit scientificAreaUnit = (ScientificAreaUnit) unit;
	    return scientificAreaUnit.getDepartmentUnit().getDepartment();
	}
	return null;
    }

    public ActionForward selectUnit(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	VigilancyCourseGroupBean bean = (VigilancyCourseGroupBean) RenderUtils.getViewState("selectUnit").getMetaObject()
		.getObject();
	request.setAttribute("bean", bean);
	RenderUtils.invalidateViewState("selectUnit");
	return mapping.findForward("editCourseGroup");
    }

    public ActionForward addExecutionCourseToGroup(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	IViewState viewState = RenderUtils.getViewState("addExecutionCourses");
	VigilancyCourseGroupBean bean = (VigilancyCourseGroupBean) viewState.getMetaObject().getObject();
	List<ExecutionCourse> executionCourses = bean.getCoursesToAdd();
	VigilantGroup group = bean.getSelectedVigilantGroup();

	if (executionCourses.size() > 0) {
	    List<ExecutionCourse> coursesUnableToAdd;

	    coursesUnableToAdd = (List<ExecutionCourse>) AddExecutionCourseToGroup.run(group, executionCourses);

	    request.setAttribute("coursesUnableToAdd", coursesUnableToAdd);
	}
	bean.setCoursesToAdd(new ArrayList<ExecutionCourse>());
	request.setAttribute("bean", bean);
	RenderUtils.invalidateViewState("addExecutionCourses");
	return mapping.findForward("editCourseGroup");

    }

    public ActionForward removeExecutionCoursesFromGroup(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	VigilancyCourseGroupBean bean = (VigilancyCourseGroupBean) RenderUtils.getViewState("removeExecutionCourses")
		.getMetaObject().getObject();
	List<ExecutionCourse> executionCourses = bean.getCourses();
	VigilantGroup group = bean.getSelectedVigilantGroup();

	try {

	    RemoveExecutionCoursesFromGroup.run(group, executionCourses);
	} catch (DomainException e) {
	    addActionMessage(request, e.getMessage());
	}

	request.setAttribute("bean", bean);
	RenderUtils.invalidateViewState("removeExecutionCourses");
	return mapping.findForward("editCourseGroup");
    }

    public ActionForward addExternalCourse(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {

	IViewState viewState = (IViewState) RenderUtils.getViewState("addExternalCourse");
	if (viewState == null) {
	    viewState = (IViewState) RenderUtils.getViewState("addExternalCourse-withoutjs");
	}
	VigilancyCourseGroupBean bean = (VigilancyCourseGroupBean) viewState.getMetaObject().getObject();

	ExecutionCourse course = bean.getExternalCourse();
	VigilantGroup group = bean.getSelectedVigilantGroup();
	if (course != null) {
	    List<ExecutionCourse> courses = new ArrayList<ExecutionCourse>();
	    courses.add(course);

	    try {

		AddExecutionCourseToGroup.run(group, courses);
	    } catch (DomainException e) {
		addActionMessage(request, e.getMessage());
	    }
	}
	if (RenderUtils.getViewState("addExternalCourse-withoutjs") != null) {
	    RenderUtils.invalidateViewState("addExternalCourse-withoutjs");
	}

	request.setAttribute("bean", bean);
	bean.setExternalCourse(null);
	return mapping.findForward("editCourseGroup");
    }
}