/*
 * @(#)SimplifiedAcquisitionPredicate.java
 *
 * Copyright 2009 Instituto Superior Tecnico
 * Founding Authors: Luis Cruz, Nuno Ochoa, Paulo Abrantes
 * 
 *      https://fenix-ashes.ist.utl.pt/
 * 
 *   This file is part of the Expenditure Tracking Module.
 *
 *   The Expenditure Tracking Module is free software: you can
 *   redistribute it and/or modify it under the terms of the GNU Lesser General
 *   Public License as published by the Free Software Foundation, either version 
 *   3 of the License, or (at your option) any later version.
 *
 *   The Expenditure Tracking Module 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 Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with the Expenditure Tracking Module. If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package pt.ist.expenditureTrackingSystem.domain.acquisitions.search.predicates;

import java.util.Collection;
import java.util.Set;

import module.workflow.domain.ProcessFile;

import org.fenixedu.bennu.core.domain.User;

import pt.ist.expenditureTrackingSystem.domain.acquisitions.AcquisitionProcess;
import pt.ist.expenditureTrackingSystem.domain.acquisitions.AcquisitionProcessStateType;
import pt.ist.expenditureTrackingSystem.domain.acquisitions.AcquisitionProposalDocument;
import pt.ist.expenditureTrackingSystem.domain.acquisitions.AcquisitionRequest;
import pt.ist.expenditureTrackingSystem.domain.acquisitions.Financer;
import pt.ist.expenditureTrackingSystem.domain.acquisitions.PaymentProcess;
import pt.ist.expenditureTrackingSystem.domain.acquisitions.RegularAcquisitionProcess;
import pt.ist.expenditureTrackingSystem.domain.acquisitions.search.SearchPaymentProcess;
import pt.ist.expenditureTrackingSystem.domain.acquisitions.search.SearchProcessValues;
import pt.ist.expenditureTrackingSystem.domain.acquisitions.simplified.SimplifiedProcedureProcess;
import pt.ist.expenditureTrackingSystem.domain.acquisitions.simplified.SimplifiedProcedureProcess.ProcessClassification;
import pt.ist.expenditureTrackingSystem.domain.organization.AccountingUnit;
import pt.ist.expenditureTrackingSystem.domain.organization.Person;
import pt.ist.expenditureTrackingSystem.domain.organization.Supplier;

/**
 * 
 * @author Paulo Abrantes
 * @author Luis Cruz
 * 
 */
public class SimplifiedAcquisitionPredicate extends SearchPredicate {

    @Override
    public boolean evaluate(PaymentProcess process, SearchPaymentProcess searchBean) {
        final AcquisitionRequest acquisitionRequest = process.getRequest();
        final Person taker = searchBean.getTaker();
        return matchesSearchCriteria(acquisitionRequest, searchBean)
                && (acquisitionRequest.getProcess().isAccessibleToCurrentUser() || process.isTakenByCurrentUser() || (taker != null && process
                        .isTakenByPerson(taker.getUser())));
    }

    private boolean matchesSearchCriteria(final AcquisitionRequest acquisitionRequest, SearchPaymentProcess searchBean) {

        final Person person = acquisitionRequest.getRequester();
        AcquisitionProcess acquisitionProcess = acquisitionRequest.getAcquisitionProcess();

        final Collection<Supplier> suppliers = acquisitionRequest.getSuppliers();
        final String identification = acquisitionRequest.getAcquisitionProcessId();
        final String acquisitionRequestDocumentID =
                acquisitionProcess.hasPurchaseOrderDocument() ? acquisitionProcess.getAcquisitionRequestDocumentID() : null;
        final AcquisitionProcessStateType type = acquisitionProcess.getAcquisitionProcessStateType();
        final Set<AccountingUnit> accountingUnits = acquisitionRequest.getAccountingUnits();
        User currentOwner = acquisitionProcess.getCurrentOwner();
        final Person taker = currentOwner != null ? currentOwner.getExpenditurePerson() : null;
        final Person accountManager = searchBean.getAccountManager();
        final Boolean showOnlyWithUnreadComments = searchBean.getShowOnlyWithUnreadComments();
        final SimplifiedProcedureProcess process = (SimplifiedProcedureProcess) acquisitionRequest.getProcess();
        final Boolean showPrioritiesOnly = searchBean.getShowPriorityOnly();
        SearchProcessValues searchProcess = searchBean.getSearchProcess();
        final ProcessClassification searchClassification = searchProcess != null ? searchProcess.getSearchClassification() : null;

        Person loggedPerson = Person.getLoggedPerson();

        return matchCriteria(searchBean.getProcessId(), identification)
                && matchCriteria(searchClassification, process.getProcessClassification())
                && matchCriteria(searchBean.getRequestingPerson(), person)
                && (matchCriteria(searchBean.getRequestingUnit(), acquisitionRequest.getRequestingUnit()))
                && (matchCriteria(searchBean.getPayingUnit(), acquisitionRequest.getFinancersSet()))
                && matchContainsCriteria(searchBean.getSupplier(), suppliers)
                && matchAcquisitionProposalId(searchBean.getProposalId(), acquisitionRequest.getAcquisitionProcess())
                && matchCriteria(searchBean.getHasAvailableAndAccessibleActivityForUser(), acquisitionRequest)
                && matchCriteria(searchBean.getAcquisitionProcessStateType(), type)
                && matchContainsCriteria(searchBean.getAccountingUnit(), accountingUnits)
                && matchCriteria(searchBean.getRequestDocumentId(), acquisitionRequestDocumentID)
                && (!showPrioritiesOnly || process.isPriorityProcess())
                && matchShowOnlyCriteris(acquisitionRequest, searchBean)
                && matchCriteria(searchBean.getTaker(), taker)
                && matchesProjectAccountManager(acquisitionRequest, accountManager)
                && (!showOnlyWithUnreadComments || (!process.getUnreadCommentsForPerson(loggedPerson).isEmpty() && process
                        .hasActivitiesFromUser(loggedPerson)))
                && matchContainsCriteria(searchBean.getCpvReference(), acquisitionRequest.getProcess().getCPVReferences());
    }

    private boolean matchCriteria(ProcessClassification searchClassification, ProcessClassification processClassification) {
        return searchClassification == null || searchClassification == processClassification;
    }

    private boolean matchAcquisitionProposalId(final String proposalId, final AcquisitionProcess acquisitionProcess) {
        if (proposalId == null || proposalId.length() == 0) {
            return true;
        }
        for (final ProcessFile processFile : acquisitionProcess.getFilesSet()) {
            if (processFile instanceof AcquisitionProposalDocument) {
                final AcquisitionProposalDocument acquisitionProposalDocument = (AcquisitionProposalDocument) processFile;
                if (matchCriteria(proposalId, acquisitionProposalDocument.getProposalId())) {
                    return true;
                }
            }
        }
        return false;
    }

    protected boolean matchCriteria(AcquisitionProcessStateType acquisitionProcessStateType, AcquisitionProcessStateType type) {
        return acquisitionProcessStateType == null || acquisitionProcessStateType.equals(type);
    }

    private boolean matchCriteria(final Boolean hasAvailableAndAccessibleActivityForUser,
            final AcquisitionRequest acquisitionRequest) {
        return hasAvailableAndAccessibleActivityForUser == null
                || !hasAvailableAndAccessibleActivityForUser.booleanValue()
                || (acquisitionRequest.getProcess() instanceof RegularAcquisitionProcess && acquisitionRequest.getProcess()
                        .hasAnyAvailableActivity(true));
    }

    private boolean matchShowOnlyCriteris(final AcquisitionRequest acquisitionRequest, final SearchPaymentProcess searchBean) {
        if (searchBean.getShowOnlyAcquisitionsExcludedFromSupplierLimit().booleanValue()
                && !acquisitionRequest.getProcess().getShouldSkipSupplierFundAllocation().booleanValue()) {
            return false;
        }
        if (searchBean.getShowOnlyAcquisitionsWithAdditionalCosts().booleanValue()) {
            return acquisitionRequest.hasAdditionalCosts();
        }
        return true;
    }

    private boolean matchesProjectAccountManager(final AcquisitionRequest acquisitionRequest, final Person accountManager) {
        if (accountManager == null) {
            return true;
        }
        for (final Financer financer : acquisitionRequest.getFinancersSet()) {
            if (financer.isAccountManager(accountManager)) {
                return true;
            }
        }
        return false;
    }

}