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

import java.util.List;
import java.util.Map;
import java.util.TreeMap;

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

import net.sourceforge.fenixedu.dataTransferObject.research.result.ExecutionYearBean;
import net.sourceforge.fenixedu.domain.ExecutionYear;
import net.sourceforge.fenixedu.domain.ExpectationEvaluationGroup;
import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.Teacher;
import net.sourceforge.fenixedu.domain.teacher.TeacherPersonalExpectation;
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 ExpectationsEvaluationDA extends FenixDispatchAction {

    public ActionForward chooseTeacher(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) {

	Teacher teacher = getLoggedTeacher(request);
	ExecutionYear executionYear = ExecutionYear.readCurrentExecutionYear();

	readAndSetEvaluatedTeachersWithExpectations(request, teacher, executionYear);

	return mapping.findForward("chooseTeacher");
    }

    public ActionForward chooseTeacherInSelectedExecutionYear(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) {

	Teacher teacher = getLoggedTeacher(request);
	IViewState viewState = RenderUtils.getViewState("executionYear");
	ExecutionYear executionYear = (ExecutionYear) viewState.getMetaObject().getObject();

	readAndSetEvaluatedTeachersWithExpectations(request, teacher, executionYear);

	return mapping.findForward("chooseTeacher");
    }

    public ActionForward chooseTeacherInExecutionYear(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) {

	Teacher teacher = getLoggedTeacher(request);
	ExecutionYear executionYear = getExecutionYearFromParameter(request);

	readAndSetEvaluatedTeachersWithExpectations(request, teacher, executionYear);

	return mapping.findForward("chooseTeacher");
    }

    public ActionForward prepareEditExpectationEvaluation(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) {

	TeacherPersonalExpectation expectation = getTeacherPersonalExpectationFromParameter(request);
	if (expectation != null) {
	    Teacher teacher = getLoggedTeacher(request);
	    ExecutionYear executionYear = expectation.getExecutionYear();
	    if (teacher.hasExpectationEvaluatedTeacher(expectation.getTeacher(), executionYear)) {
		request.setAttribute("teacherPersonalExpectation", expectation);
	    }
	}
	return mapping.findForward("prepareEditEvaluation");
    }

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

	TeacherPersonalExpectation teacherPersonalExpectation = getTeacherPersonalExpectationFromParameter(request);
	Teacher loggedTeacher = getLoggedTeacher(request);
	if (teacherPersonalExpectation != null
		&& loggedTeacher.hasExpectationEvaluatedTeacher(teacherPersonalExpectation.getTeacher(),
			teacherPersonalExpectation.getExecutionYear())) {
	    request.setAttribute("noEdit", true);
	    request.setAttribute("teacherPersonalExpectation", teacherPersonalExpectation);
	}
	return mapping.findForward("seeTeacherPersonalExpectations");
    }

    private TeacherPersonalExpectation getTeacherPersonalExpectationFromParameter(final HttpServletRequest request) {
	final String teacherPersonalExpectationIDString = request.getParameter("teacherPersonalExpectationID");
	final Integer teacherPersonalExpectationID = Integer.valueOf(teacherPersonalExpectationIDString);
	return rootDomainObject.readTeacherPersonalExpectationByOID(teacherPersonalExpectationID);
    }

    private ExecutionYear getExecutionYearFromParameter(final HttpServletRequest request) {
	final String executionYearIDString = request.getParameter("executionYearID");
	final Integer executionYearID = Integer.valueOf(executionYearIDString);
	return rootDomainObject.readExecutionYearByOID(executionYearID);
    }

    private void readAndSetEvaluatedTeachersWithExpectations(HttpServletRequest request, Teacher teacher,
	    ExecutionYear executionYear) {
	Map<Teacher, TeacherPersonalExpectation> result = new TreeMap<Teacher, TeacherPersonalExpectation>(
		Teacher.TEACHER_COMPARATOR_BY_CATEGORY_AND_NUMBER);
	List<ExpectationEvaluationGroup> groups = teacher.getEvaluatedExpectationEvaluationGroups(executionYear);
	for (ExpectationEvaluationGroup group : groups) {
	    TeacherPersonalExpectation evaluatedTeacherExpectation = group.getEvaluated()
		    .getTeacherPersonalExpectationByExecutionYear(executionYear);
	    result.put(group.getEvaluated(), evaluatedTeacherExpectation);
	}
	request.setAttribute("evaluatedTeachers", result);
	request.setAttribute("executionYearBean", new ExecutionYearBean(executionYear));
    }

    private Teacher getLoggedTeacher(HttpServletRequest request) {
	Person loggedPerson = getLoggedPerson(request);
	return (loggedPerson != null) ? loggedPerson.getTeacher() : null;
    }
}