/*
 * This file is part of LibrePlan
 *
 * Copyright (C) 2009-2010 Fundación para o Fomento da Calidade Industrial e
 *                         Desenvolvemento Tecnolóxico de Galicia
 * Copyright (C) 2010-2012 Igalia, S.L.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.libreplan.ws.workreports.impl;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;

import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

import org.libreplan.business.common.daos.IIntegrationEntityDAO;
import org.libreplan.business.common.exceptions.InstanceNotFoundException;
import org.libreplan.business.common.exceptions.ValidationException;
import org.libreplan.business.orders.daos.ISumChargedEffortDAO;
import org.libreplan.business.orders.entities.OrderElement;
import org.libreplan.business.workreports.daos.IWorkReportDAO;
import org.libreplan.business.workreports.daos.IWorkReportLineDAO;
import org.libreplan.business.workreports.entities.WorkReport;
import org.libreplan.business.workreports.entities.WorkReportLine;
import org.libreplan.ws.common.api.InstanceConstraintViolationsListDTO;
import org.libreplan.ws.common.impl.GenericRESTService;
import org.libreplan.ws.workreports.api.IWorkReportService;
import org.libreplan.ws.workreports.api.WorkReportDTO;
import org.libreplan.ws.workreports.api.WorkReportListDTO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
 * REST-based implementation of {@link IWorkReportService}.
 *
 * @author Manuel Rego Casasnovas <mrego@igalia.com>
 */
@Path("/workreports/")
@Produces("application/xml")
@Service("workReportServiceREST")
public class WorkReportServiceREST extends GenericRESTService<WorkReport, WorkReportDTO> implements IWorkReportService {

    private Set<OrderElement> orderElements;

    @Autowired
    private IWorkReportDAO workReportDAO;

    @Autowired
    private IWorkReportLineDAO workReportLineDAO;

    @Autowired
    private ISumChargedEffortDAO sumChargedEffortDAO;

    @Override
    @GET
    @Transactional(readOnly = true)
    public WorkReportListDTO getWorkReports() {
        return new WorkReportListDTO(findAll());
    }

    @Override
    @POST
    @Consumes("application/xml")
    public InstanceConstraintViolationsListDTO addWorkReports(WorkReportListDTO workReportListDTO) {
        return save(workReportListDTO.workReports);
    }

    @Override
    protected WorkReport toEntity(WorkReportDTO entityDTO) {
        try {
            return WorkReportConverter.toEntity(entityDTO);
        } catch (InstanceNotFoundException e) {
            return null;
        }
    }

    @Override
    protected WorkReportDTO toDTO(WorkReport entity) {
        return WorkReportConverter.toDTO(entity);
    }

    @Override
    protected IIntegrationEntityDAO<WorkReport> getIntegrationEntityDAO() {
        return workReportDAO;
    }

    @Override
    protected void updateEntity(WorkReport entity, WorkReportDTO entityDTO)
            throws ValidationException {

        WorkReportConverter.updateWorkReport(entity, entityDTO);

    }

    @Override
    protected void beforeSaving(WorkReport entity) {
        orderElements = sumChargedEffortDAO
                .getOrderElementsToRecalculateTimsheetDates(
                        entity.getWorkReportLines(), null);
        sumChargedEffortDAO
                .updateRelatedSumChargedEffortWithWorkReportLineSet(entity
                        .getWorkReportLines());
    }

    @Override
    protected void afterSaving(WorkReport entity) {
        sumChargedEffortDAO.recalculateTimesheetData(orderElements);
    }

    @Override
    @GET
    @Path("/{code}/")
    @Transactional(readOnly = true)
    public Response getWorkReport(@PathParam("code") String code) {
        return getDTOByCode(code);
    }

    @Override
    @DELETE
    @Path("/{code}/")
    @Transactional
    public Response removeWorkReport(@PathParam("code") String code) {
        try {
            WorkReport workReport = workReportDAO.findByCode(code);
            Set<OrderElement> orderElements = sumChargedEffortDAO
                    .getOrderElementsToRecalculateTimsheetDates(null,
                            workReport.getWorkReportLines());
            sumChargedEffortDAO
                    .updateRelatedSumChargedEffortWithDeletedWorkReportLineSet(workReport
                            .getWorkReportLines());
            workReportDAO.remove(workReport.getId());
            sumChargedEffortDAO.recalculateTimesheetData(orderElements);
            return Response.ok().build();
        } catch (InstanceNotFoundException e) {
            return Response.status(Status.NOT_FOUND).build();
        }
    }

    @Override
    @DELETE
    @Path("/line/{code}/")
    @Transactional
    public Response removeWorkReportLine(@PathParam("code") String code) {
        try {
            WorkReportLine workReportLine = workReportLineDAO.findByCode(code);
            Set<OrderElement> orderElements = sumChargedEffortDAO
                    .getOrderElementsToRecalculateTimsheetDates(null,
                            Collections.singleton(workReportLine));
            sumChargedEffortDAO
                    .updateRelatedSumChargedEffortWithDeletedWorkReportLineSet(new HashSet<>(
                            Collections.singletonList(workReportLine)));
            workReportLineDAO.remove(workReportLine.getId());
            sumChargedEffortDAO.recalculateTimesheetData(orderElements);
            return Response.ok().build();
        } catch (InstanceNotFoundException e) {
            return Response.status(Status.NOT_FOUND).build();
        }
    }

}