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

import net.sourceforge.fenixedu.applicationTier.Servico.departmentAdmOffice.DeleteExpectationEvaluationGroup;

import net.sourceforge.fenixedu.applicationTier.Servico.departmentAdmOffice.CreateExpectationEvaluationGroup;

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.applicationTier.Filtro.exception.FenixFilterException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.dataTransferObject.department.ExpectationEvaluationGroupBean;
import net.sourceforge.fenixedu.dataTransferObject.research.result.ExecutionYearBean;
import net.sourceforge.fenixedu.domain.Department;
import net.sourceforge.fenixedu.domain.ExecutionYear;
import net.sourceforge.fenixedu.domain.ExpectationEvaluationGroup;
import net.sourceforge.fenixedu.domain.Teacher;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
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 ExpectationsEvaluationGroupsDA extends FenixDispatchAction {

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

	Department department = getDepartment(request);
	ExecutionYear executionYear = ExecutionYear.readCurrentExecutionYear();
	readAndSetAppraiserTeachers(request, department, executionYear);
	return mapping.findForward("listGroups");
    }

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

	Department department = getDepartment(request);
	IViewState viewState = RenderUtils.getViewState("executionYear");
	ExecutionYear executionYear = (ExecutionYear) viewState.getMetaObject().getObject();
	readAndSetAppraiserTeachers(request, department, executionYear);
	return mapping.findForward("listGroups");
    }

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

	Department department = getDepartment(request);
	ExecutionYear executionYear = getExecutionYearFromParameter(request);
	readAndSetAppraiserTeachers(request, department, executionYear);
	return mapping.findForward("listGroups");
    }

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

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

	Department employeeDepartment = getDepartment(request);
	Department teacherWorkingDepartment = teacher.getLastWorkingDepartment(executionYear.getBeginDateYearMonthDay(),
		executionYear.getEndDateYearMonthDay());

	if (teacherWorkingDepartment != null && employeeDepartment != null && teacherWorkingDepartment.equals(employeeDepartment)) {
	    request.setAttribute("expectationEvaluationGroupBean", new ExpectationEvaluationGroupBean(teacher, executionYear));
	    request.setAttribute("evaluatedTeacherGroups", teacher.getEvaluatedExpectationEvaluationGroups(executionYear));
	}

	return mapping.findForward("manageGroups");
    }

    public ActionForward createGroup(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws FenixFilterException, FenixServiceException {

	IViewState viewState = RenderUtils.getViewState("expectationEvaluationGroupBeanWithEvaluatedTeacher");
	ExpectationEvaluationGroupBean bean = (ExpectationEvaluationGroupBean) viewState.getMetaObject().getObject();

	try {
	    CreateExpectationEvaluationGroup.run(bean.getAppraiser(), bean.getEvaluated(), bean.getExecutionYear());
	} catch (DomainException e) {
	    addActionMessage(request, e.getMessage());
	}

	RenderUtils.invalidateViewState("expectationEvaluationGroupBeanWithEvaluatedTeacher");
	bean.setEvaluated(null);
	request.setAttribute("evaluatedTeacherGroups", bean.getAppraiser().getEvaluatedExpectationEvaluationGroups(
		bean.getExecutionYear()));
	request.setAttribute("expectationEvaluationGroupBean", bean);

	return mapping.findForward("manageGroups");
    }

    public ActionForward deleteGroup(ActionMapping mapping, ActionForm form, HttpServletRequest request,
	    HttpServletResponse response) throws FenixFilterException, FenixServiceException {

	ExpectationEvaluationGroup group = getExpectationEvaluationGroupFromParameter(request);
	Teacher appraiser = group.getAppraiser();
	ExecutionYear executionYear = group.getExecutionYear();

	Department employeeDepartment = getDepartment(request);
	Department appraiserDepartment = appraiser.getLastWorkingDepartment(executionYear.getBeginDateYearMonthDay(),
		executionYear.getEndDateYearMonthDay());

	if (appraiserDepartment != null && employeeDepartment != null && appraiserDepartment.equals(employeeDepartment)) {
	    try {
		DeleteExpectationEvaluationGroup.run(group);
		request.setAttribute("evaluatedTeacherGroups", appraiser.getEvaluatedExpectationEvaluationGroups(executionYear));
		request.setAttribute("expectationEvaluationGroupBean", new ExpectationEvaluationGroupBean(appraiser,
			executionYear));

	    } catch (DomainException e) {
		addActionMessage(request, e.getMessage());
	    }
	}

	return mapping.findForward("manageGroups");
    }

    // private methods

    private void readAndSetAppraiserTeachers(HttpServletRequest request, Department department, ExecutionYear executionYear) {
	Map<Teacher, List<ExpectationEvaluationGroup>> result = new TreeMap<Teacher, List<ExpectationEvaluationGroup>>(
		Teacher.TEACHER_COMPARATOR_BY_CATEGORY_AND_NUMBER);
	if (executionYear != null && department != null) {
	    List<Teacher> currentTeachers = department.getAllTeachers(executionYear.getBeginDateYearMonthDay(), executionYear
		    .getEndDateYearMonthDay());
	    for (Teacher teacher : currentTeachers) {
		result.put(teacher, teacher.getEvaluatedExpectationEvaluationGroups(executionYear));
	    }
	}
	request.setAttribute("executionYearBean", new ExecutionYearBean(executionYear));
	request.setAttribute("teachers", result);
    }

    private ExpectationEvaluationGroup getExpectationEvaluationGroupFromParameter(final HttpServletRequest request) {
	final String goupIDString = request.getParameter("groupID");
	final Integer goupID = Integer.valueOf(goupIDString);
	return rootDomainObject.readExpectationEvaluationGroupByOID(goupID);
    }

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

    private Teacher getTeacherFromParameter(final HttpServletRequest request) {
	final String teacherIDString = request.getParameter("teacherID");
	final Integer teacherID = Integer.valueOf(teacherIDString);
	return rootDomainObject.readTeacherByOID(teacherID);
    }

    private Department getDepartment(HttpServletRequest request) {
	return getLoggedPerson(request).getEmployee().getCurrentDepartmentWorkingPlace();
    }
}