/*
 * eGov suite of products aim to improve the internal efficiency,transparency,
 *    accountability and the service delivery of the government  organizations.
 *
 *     Copyright (C) <2015>  eGovernments Foundation
 *
 *     The updated version of eGov suite of products as by eGovernments Foundation
 *     is available at http://www.egovernments.org
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     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 General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program. If not, see http://www.gnu.org/licenses/ or
 *     http://www.gnu.org/licenses/gpl.html .
 *
 *     In addition to the terms of the GPL license to be adhered to in using this
 *     program, the following additional terms are to be complied with:
 *
 *         1) All versions of this program, verbatim or modified must carry this
 *            Legal Notice.
 *
 *         2) Any misrepresentation of the origin of the material is prohibited. It
 *            is required that all modified versions of this material be marked in
 *            reasonable ways as different from the original version.
 *
 *         3) This license does not grant any rights to any user of the program
 *            with regards to rights under trademark law for use of the trade names
 *            or trademarks of eGovernments Foundation.
 *
 *   In case of any queries, you can reach eGovernments Foundation at contact@egovernments.org.
 */
package org.egov.works.lineestimate.service;

import java.io.Serializable;
import java.sql.SQLException;
import java.util.Calendar;
import java.util.Date;

import org.egov.commons.CFinancialYear;
import org.egov.commons.dao.FinancialYearHibernateDAO;
import org.egov.infra.exception.ApplicationRuntimeException;
import org.egov.infra.persistence.utils.DBSequenceGenerator;
import org.egov.infra.persistence.utils.SequenceNumberGenerator;
import org.egov.works.lineestimate.entity.LineEstimateDetails;
import org.egov.works.lineestimate.entity.enums.WorkCategory;
import org.hibernate.exception.SQLGrammarException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
public class WorkOrderIdentificationNumberGenerator {

    private static final String PROJECTCODE_SEQ_PREFIX = "SEQ_PROJECTCODE";

    @Autowired
    private SequenceNumberGenerator sequenceNumberGenerator;

    @Autowired
    private DBSequenceGenerator dbSequenceGenerator;

    @Autowired
    private FinancialYearHibernateDAO financialYearHibernateDAO;

    @Transactional
    public String generateWorkOrderIdentificationNumber(final LineEstimateDetails lineEstimateDetails) {
        try {
            final CFinancialYear financialYear = financialYearHibernateDAO
                    .getFinYearByDate(lineEstimateDetails.getLineEstimate().getLineEstimateDate());
            final String finYearRange[] = financialYear.getFinYearRange().split("-");
            final String sequenceName = PROJECTCODE_SEQ_PREFIX + "_" + finYearRange[0] + "_" + finYearRange[1];
            final String workCategory;
            if (!lineEstimateDetails.getLineEstimate().getWorkCategory().toString().equals(WorkCategory.NON_SLUM.toString()))
                workCategory = "SL";
            else
                workCategory = "NS";
            Serializable sequenceNumber;
            try {
                sequenceNumber = sequenceNumberGenerator.getNextSequence(sequenceName);
            } catch (final SQLGrammarException e) {
                sequenceNumber = dbSequenceGenerator.createAndGetNextSequence(sequenceName);
            }
            return String.format("%s/%s/%05d/%02d/%s", lineEstimateDetails.getLineEstimate().getExecutingDepartment().getCode(),
                    workCategory, sequenceNumber,
                    getMonthOfTransaction(lineEstimateDetails.getLineEstimate().getLineEstimateDate()),
                    financialYear.getFinYearRange());
        } catch (final SQLException e) {
            throw new ApplicationRuntimeException("Error occurred while generating WIN", e);
        }
    }

    private int getMonthOfTransaction(final Date lineEstimateDate) {
        final Calendar cal = Calendar.getInstance();
        cal.setTime(lineEstimateDate);
        return cal.get(Calendar.MONTH) + 1;
    }

}