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

import java.io.IOException;
import java.io.OutputStream;
import java.util.Set;

import javax.servlet.ServletOutputStream;
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.domain.Degree;
import net.sourceforge.fenixedu.domain.Department;
import net.sourceforge.fenixedu.domain.ExecutionCourse;
import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.Professorship;
import net.sourceforge.fenixedu.domain.Teacher;
import net.sourceforge.fenixedu.domain.executionCourse.ExecutionCourseWithNoEvaluationMethodSearchBean;
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 org.joda.time.DateTime;

import pt.utl.ist.fenix.tools.util.excel.Spreadsheet;
import pt.utl.ist.fenix.tools.util.excel.Spreadsheet.Row;

public class EvaluationMethodControlDA extends FenixDispatchAction {

    private abstract static class MethodInvoker {
	public abstract void export(final Spreadsheet spreadsheet, final OutputStream outputStream) throws IOException;

	public abstract String getExtension();
    }

    public ActionForward search(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) throws Exception {
	final ExecutionCourseWithNoEvaluationMethodSearchBean executionCourseWithNoEvaluationMethodSearchBean = getSearchBean(request);
	request.setAttribute("executionCourseWithNoEvaluationMethodSearchBean", executionCourseWithNoEvaluationMethodSearchBean);
	request.setAttribute("executionCourses", executionCourseWithNoEvaluationMethodSearchBean.getSearchResult());
	return mapping.findForward("search");
    }

    public ActionForward exportToXLS(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) throws FenixServiceException, FenixFilterException {
	export(request, response, new MethodInvoker() {
	    @Override
	    public void export(Spreadsheet spreadsheet, OutputStream outputStream) throws IOException {
		spreadsheet.exportToXLSSheet(outputStream);
	    }

	    @Override
	    public String getExtension() {
		return ".xls";
	    }
	});
	return null;
    }

    public ActionForward exportToCSV(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request,
	    HttpServletResponse response) throws FenixServiceException, FenixFilterException {
	export(request, response, new MethodInvoker() {
	    @Override
	    public void export(Spreadsheet spreadsheet, OutputStream outputStream) throws IOException {
		spreadsheet.exportToCSV(outputStream, "\t");
	    }

	    @Override
	    public String getExtension() {
		return ".csv";
	    }
	});
	return null;
    }

    public ActionForward export(HttpServletRequest request, HttpServletResponse response, final MethodInvoker methodInvoker)
	    throws FenixServiceException, FenixFilterException {

	final ExecutionCourseWithNoEvaluationMethodSearchBean executionCourseWithNoEvaluationMethodSearchBean = getSearchBean(request);

	try {
	    String filename = "ControloMetodosAvaliacao:" + new DateTime().toString("yyyyMMddHHmm");
	    response.setContentType("text/plain");
	    response.setHeader("Content-disposition", "attachment; filename=" + filename + methodInvoker.getExtension());

	    ServletOutputStream writer = response.getOutputStream();

	    final Spreadsheet spreadsheet = new Spreadsheet("ControloMetodosAvaliacao");
	    for (final ExecutionCourse executionCourse : (Set<ExecutionCourse>) executionCourseWithNoEvaluationMethodSearchBean
		    .getSearchResult()) {
		final Row row = spreadsheet.addRow();
		row.setCell(executionCourse.getNome());
		final StringBuilder degrees = new StringBuilder();
		for (final Degree degree : executionCourse.getDegreesSortedByDegreeName()) {
		    if (degrees.length() > 0) {
			degrees.append(", ");
		    }
		    degrees.append(degree.getSigla());
		}
		row.setCell(degrees.toString());
		final StringBuilder responsibleTeachers = new StringBuilder();
		final StringBuilder otherTeachers = new StringBuilder();
		for (final Professorship professorship : executionCourse.getProfessorshipsSet()) {
		    final Teacher teacher = professorship.getTeacher();
		    final Person person = teacher.getPerson();
		    if (professorship.isResponsibleFor()) {
			if (responsibleTeachers.length() > 0) {
			    responsibleTeachers.append(", ");
			}
			responsibleTeachers.append(person.getName());
			responsibleTeachers.append(" (");
			responsibleTeachers.append(person.getEmail());
			responsibleTeachers.append(" )");
		    } else {
			if (otherTeachers.length() > 0) {
			    otherTeachers.append(", ");
			}
			otherTeachers.append(person.getName());
			otherTeachers.append(" (");
			otherTeachers.append(person.getEmail());
			otherTeachers.append(" )");
		    }
		}
		row.setCell(responsibleTeachers.toString());
		row.setCell(otherTeachers.toString());
		final StringBuilder departments = new StringBuilder();
		for (final Department department : executionCourse.getDepartments()) {
		    if (departments.length() > 0) {
			departments.append(", ");
		    }
		    departments.append(department.getName());
		}
		row.setCell(departments.toString());
	    }
	    methodInvoker.export(spreadsheet, writer);

	    writer.flush();
	    response.flushBuffer();

	} catch (IOException e) {
	    throw new FenixServiceException();
	}
	return null;
    }

    private ExecutionCourseWithNoEvaluationMethodSearchBean getSearchBean(HttpServletRequest request) {
	ExecutionCourseWithNoEvaluationMethodSearchBean executionCourseWithNoEvaluationMethodSearchBean = getExecutionCourseWithNoEvaluationMethodSearchBean(request);
	if (executionCourseWithNoEvaluationMethodSearchBean == null) {
	    executionCourseWithNoEvaluationMethodSearchBean = new ExecutionCourseWithNoEvaluationMethodSearchBean();
	}
	return executionCourseWithNoEvaluationMethodSearchBean;
    }

    private ExecutionCourseWithNoEvaluationMethodSearchBean getExecutionCourseWithNoEvaluationMethodSearchBean(
	    final HttpServletRequest request) {
	final ExecutionCourseWithNoEvaluationMethodSearchBean executionCourseWithNoEvaluationMethodSearchBean = (ExecutionCourseWithNoEvaluationMethodSearchBean) getRenderedObject();
	return executionCourseWithNoEvaluationMethodSearchBean == null ? (ExecutionCourseWithNoEvaluationMethodSearchBean) request
		.getAttribute("executionCourseWithNoEvaluationMethodSearchBean")
		: executionCourseWithNoEvaluationMethodSearchBean;
    }

}