/**
 * 
 */
package net.sourceforge.fenixedu.presentationTier.Action.publico;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

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

import net.sourceforge.fenixedu.dataTransferObject.inquiries.SearchInquiriesResultPageDTO;
import net.sourceforge.fenixedu.domain.ExecutionCourse;
import net.sourceforge.fenixedu.domain.ExecutionDegree;
import net.sourceforge.fenixedu.domain.ExecutionSemester;
import net.sourceforge.fenixedu.domain.inquiries.StudentInquiriesCourseResult;
import net.sourceforge.fenixedu.domain.inquiries.teacher.InquiryResponsePeriodType;
import net.sourceforge.fenixedu.domain.inquiries.teacher.TeachingInquiry;
import net.sourceforge.fenixedu.presentationTier.Action.base.FenixDispatchAction;

import org.apache.commons.collections.comparators.ReverseComparator;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import pt.ist.fenixWebFramework.struts.annotations.Forward;
import pt.ist.fenixWebFramework.struts.annotations.Forwards;
import pt.ist.fenixWebFramework.struts.annotations.Mapping;

/**
 * @author - Shezad Anavarali (shezad@ist.utl.pt)
 * 
 */
@Mapping(path = "/searchInquiriesResultPage", module = "publico", formBeanClass = SearchInquiriesResultPageDTO.class)
@Forwards( { @Forward(name = "searchPage", path = "/executionCourse/inquiries/searchInquiriesResultPage.jsp", useTile = false) })
public class SearchInquiriesResultPageDA extends FenixDispatchAction {

    public ActionForward prepare(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) {

	SearchInquiriesResultPageDTO searchPageDTO = (SearchInquiriesResultPageDTO) actionForm;
	if (searchPageDTO.isEmptyExecutionSemesterID()) {
	    final ExecutionSemester executionSemester = ExecutionSemester.readActualExecutionSemester();
	    if (executionSemester != null) {
		final ExecutionSemester previous = executionSemester.getPreviousExecutionPeriod();
		if (previous != null) {
		    searchPageDTO.setExecutionSemesterID(previous.getOid());
		}
	    }
	}

	if (!searchPageDTO.isEmptyExecutionSemesterID()) {
	    return selectExecutionSemester(actionMapping, actionForm, request, response);
	}

	request.setAttribute("executionCourses", Collections.EMPTY_LIST);
	request.setAttribute("executionDegrees", Collections.EMPTY_LIST);
	request.setAttribute("executionSemesters", getExecutionSemesters());

	return actionMapping.findForward("searchPage");
    }

    public ActionForward selectExecutionSemester(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) {

	SearchInquiriesResultPageDTO searchPageDTO = (SearchInquiriesResultPageDTO) actionForm;

	ExecutionSemester executionSemester = searchPageDTO.getExecutionSemester();
	if (executionSemester == null) {
	    return prepare(actionMapping, actionForm, request, response);
	}

	request.setAttribute("executionCourses", Collections.EMPTY_LIST);
	request.setAttribute("executionDegrees", getExecutionDegrees(executionSemester));
	request.setAttribute("executionSemesters", getExecutionSemesters());

	return actionMapping.findForward("searchPage");
    }

    public ActionForward selectExecutionDegree(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) {

	SearchInquiriesResultPageDTO searchPageDTO = (SearchInquiriesResultPageDTO) actionForm;

	ExecutionSemester executionSemester = searchPageDTO.getExecutionSemester();
	if (executionSemester == null) {
	    return prepare(actionMapping, actionForm, request, response);
	}

	ExecutionDegree executionDegree = searchPageDTO.getExecutionDegree();
	if (executionDegree == null) {
	    return selectExecutionSemester(actionMapping, actionForm, request, response);
	}

	Collection<ExecutionCourse> executionCourses = new ArrayList<ExecutionCourse>();
	for (StudentInquiriesCourseResult studentInquiriesCourseResult : executionDegree.getStudentInquiriesCourseResults()) {
	    final ExecutionCourse executionCourse = studentInquiriesCourseResult.getExecutionCourse();
	    if (executionCourse != null && executionCourse.getExecutionPeriod() == executionSemester) {
		final Boolean publicDisclosure = studentInquiriesCourseResult.getPublicDisclosure();
		final TeachingInquiry responsibleTeachingInquiry = executionCourse.getResponsibleTeachingInquiry();
		if ((publicDisclosure != null && publicDisclosure.booleanValue())
			|| (responsibleTeachingInquiry != null && responsibleTeachingInquiry
				.getResultsDisclosureToAcademicComunity())) {
		    executionCourses.add(studentInquiriesCourseResult.getExecutionCourse());
		}
	    }
	}
	Collections.sort((List<ExecutionCourse>) executionCourses, ExecutionCourse.EXECUTION_COURSE_NAME_COMPARATOR);

	request.setAttribute("executionCourses", executionCourses);
	request.setAttribute("executionDegrees", getExecutionDegrees(executionSemester));
	request.setAttribute("executionSemesters", getExecutionSemesters());

	return actionMapping.findForward("searchPage");
    }

    public ActionForward selectExecutionCourse(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) {

	request.setAttribute("executionCourse", ((SearchInquiriesResultPageDTO) actionForm).getExecutionCourse());
	return selectExecutionDegree(actionMapping, actionForm, request, response);
    }

    private Collection<ExecutionSemester> getExecutionSemesters() {
	Collection<ExecutionSemester> executionSemesters = new ArrayList<ExecutionSemester>();
	for (final ExecutionSemester executionSemester : ExecutionSemester.readNotClosedPublicExecutionPeriods()) {
	    if (executionSemester.getInquiryResponsePeriod(InquiryResponsePeriodType.STUDENT) != null) {
		executionSemesters.add(executionSemester);
	    }
	}
	Collections.sort((List<ExecutionSemester>) executionSemesters, new ReverseComparator(
		ExecutionSemester.EXECUTION_PERIOD_COMPARATOR_BY_SEMESTER_AND_YEAR));
	return executionSemesters;
    }

    private Collection<ExecutionDegree> getExecutionDegrees(ExecutionSemester executionSemester) {
	Collection<ExecutionDegree> executionDegrees = new ArrayList<ExecutionDegree>();
	for (final ExecutionDegree executionDegree : executionSemester.getExecutionYear().getExecutionDegrees()) {
	    if (!executionDegree.getStudentInquiriesCourseResults().isEmpty()) {
		executionDegrees.add(executionDegree);
	    }
	}
	Collections.sort((List<ExecutionDegree>) executionDegrees,
		ExecutionDegree.EXECUTION_DEGREE_COMPARATORY_BY_DEGREE_TYPE_AND_NAME);
	return executionDegrees;
    }
}