package net.sourceforge.fenixedu.applicationTier.Servico.resourceAllocationManager;

import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;

import net.sourceforge.fenixedu.domain.ExecutionCourse;
import net.sourceforge.fenixedu.domain.ExecutionDegree;
import net.sourceforge.fenixedu.domain.RootDomainObject;
import net.sourceforge.fenixedu.domain.WrittenTest;
import net.sourceforge.fenixedu.domain.accessControl.Group;
import net.sourceforge.fenixedu.domain.accessControl.RoleGroup;
import net.sourceforge.fenixedu.domain.person.RoleType;
import net.sourceforge.fenixedu.domain.util.email.Message;
import net.sourceforge.fenixedu.domain.util.email.Recipient;
import net.sourceforge.fenixedu.domain.util.email.Sender;
import net.sourceforge.fenixedu.util.BundleUtil;

import org.apache.commons.lang.StringUtils;
import org.joda.time.DateTime;

import pt.ist.fenixWebFramework.services.Service;

public class GOPSendMessageService {
    private static Sender GOP_SENDER = null;

    private static Sender getGOPSender() {
        if (GOP_SENDER == null) {
            GOP_SENDER = initGOPSender();
            if (GOP_SENDER == null) {
                System.out.println("WARN: GOPSender couldn't be found, using SystemSender ...");
                GOP_SENDER = RootDomainObject.getInstance().getSystemSender();
            }
        }
        return GOP_SENDER;
    }

    private static Sender initGOPSender() {
        for (Sender sender : Sender.getAvailableSenders()) {
            final Group members = sender.getMembers();
            if (members instanceof RoleGroup) {
                if (((RoleGroup) members).getRole().getRoleType().equals(RoleType.RESOURCE_ALLOCATION_MANAGER)) {
                    return sender;
                }
            }
        }
        return null;
    }

    @Service
    public static void sendMessage(Collection<Recipient> spaceManagers, String email, String subject, String body) {
        final Sender sender = getGOPSender();
        if (email != null || !spaceManagers.isEmpty()) {
            new Message(sender, sender.getConcreteReplyTos(), spaceManagers, subject, body, email);
        }
    }

    @Service
    public static void requestRoom(WrittenTest test) {
        final String date = new SimpleDateFormat("dd/MM/yyyy").format(test.getDay().getTime());
        final String time = new SimpleDateFormat("HH:mm").format(test.getBeginning().getTime());
        final String endTime = new SimpleDateFormat("HH:mm").format(test.getEnd().getTime());

        // Foi efectuado um pedido de requisição de sala para {0} da
        // disciplina
        // {1} do(s) curso(s) {4} no dia {2} das {3} às {5}

        final Set<String> courseNames = new HashSet<String>();
        final Set<String> degreeNames = new HashSet<String>();
        final Set<ExecutionDegree> degrees = new HashSet<ExecutionDegree>();
        for (ExecutionCourse course : test.getAssociatedExecutionCourses()) {
            courseNames.add(course.getName());
            degreeNames.add(course.getDegreePresentationString());
            degrees.addAll(course.getExecutionDegrees());
        }

        final String degreesString = StringUtils.join(degreeNames, ",");
        final String coursesString = StringUtils.join(courseNames, ",");
        final String subject =
                BundleUtil.getStringFromResourceBundle("resources.ApplicationResources", "email.request.room.subject",
                        coursesString, test.getDescription());

        final String body =
                BundleUtil.getStringFromResourceBundle("resources.ApplicationResources", "email.request.room.body",
                        test.getDescription(), coursesString, date, time, degreesString, endTime);
        for (String email : getGOPEmail(degrees)) {
            new Message(getGOPSender(), email, subject, body);
        }
        test.setRequestRoomSentDate(new DateTime());
    }

    @Service
    public static void requestChangeRoom(WrittenTest test, Date oldDay, Date oldBeginning, Date oldEnd) {

        final String oldDate = new SimpleDateFormat("dd/MM/yyyy").format(oldDay);
        final String oldStartTime = new SimpleDateFormat("HH:mm").format(oldBeginning);
        final String oldEndTime = new SimpleDateFormat("HH:mm").format(oldEnd);

        final String date = new SimpleDateFormat("dd/MM/yyyy").format(test.getDay().getTime());
        final String startTime = new SimpleDateFormat("HH:mm").format(test.getBeginning().getTime());
        final String endTime = new SimpleDateFormat("HH:mm").format(test.getEnd().getTime());

        final Set<String> courseNames = new HashSet<String>();
        final Set<String> degreeNames = new HashSet<String>();
        final Set<ExecutionDegree> degrees = new HashSet<ExecutionDegree>();
        for (ExecutionCourse course : test.getAssociatedExecutionCourses()) {
            courseNames.add(course.getName());
            degreeNames.add(course.getDegreePresentationString());
            degrees.addAll(course.getExecutionDegrees());
        }

        String coursesString = StringUtils.join(courseNames, ",");
        String degreesString = StringUtils.join(degreeNames, ",");

        final String subject =
                BundleUtil.getStringFromResourceBundle("resources.ApplicationResources", "email.request.room.subject.edit",
                        coursesString, test.getDescription());

        // O pedido de requisição de sala para {0} da disciplina {1} do(s)
        // cursos(s) {2} efecuado em {3} para o dia {4} das {5} às {6} foi
        // alterado para o dia {7} das {8} às {9}
        final String body =
                BundleUtil.getStringFromResourceBundle("resources.ApplicationResources", "email.request.room.body.edit",
                        test.getDescription(), coursesString, degreesString, test.getRequestRoomSentDateString(), oldDate,
                        oldStartTime, oldEndTime, date, startTime, endTime);
        for (String email : getGOPEmail(degrees)) {
            new Message(getGOPSender(), email, subject, body);
        }
        test.setRequestRoomSentDate(new DateTime());
    }

    private static Set<String> getGOPEmail(Collection<ExecutionDegree> degrees) {
        Set<String> emails = new HashSet<String>();
        for (ExecutionDegree executionDegree : degrees) {
            if (executionDegree.getCampus().isCampusAlameda()) {
                emails.add(BundleUtil.getStringFromResourceBundle("resources.ApplicationResources", "email.gop.alameda"));
            }
            if (executionDegree.getCampus().isCampusTaguspark()) {
                emails.add(BundleUtil.getStringFromResourceBundle("resources.ApplicationResources", "email.gop.taguspark"));
            }
        }
        return emails;
    }
}