/*
 * Copyright (c) 2010 Lockheed Martin Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.eurekastreams.server.action.validation;

import java.io.Serializable;
import java.util.Map;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.eurekastreams.commons.actions.ValidationStrategy;
import org.eurekastreams.commons.actions.context.PrincipalActionContext;
import org.eurekastreams.commons.exceptions.ValidationException;
import org.eurekastreams.commons.logging.LogFactory;
import org.eurekastreams.server.domain.CompositeEntity;
import org.eurekastreams.server.domain.DomainGroup;
import org.eurekastreams.server.persistence.mappers.stream.GetOrganizationsByShortNames;
import org.eurekastreams.server.search.modelview.DomainGroupModelView;

/**
 * 
 * Validates values entered for a Group.
 * 
 */
public class UpdateGroupValidation implements ValidationStrategy<PrincipalActionContext>
{
    /**
     * Logging for this class.
     */
    private static Log logger = LogFactory.make();

    /**
     * {@link GetOrganizationsByShortNames}.
     */
    private GetOrganizationsByShortNames mapper;

    /**
     * @param inMapper
     *            the mapper to use to get orgs.
     */
    public UpdateGroupValidation(final GetOrganizationsByShortNames inMapper)
    {
        mapper = inMapper;
    }

    /**
     * These are one off messages that are only used for this validation if these need to be reused move them to the
     * DTO. These are package protected so that test can access them.
     */

    /**
     * message if no such parent org exist.
     */
    static final String NO_SUCH_PARENT_ORG = "The selected parent organization does not exist.";

    /**
     * message if no parent org is selected.
     */
    static final String MUST_HAVE_PARENT_ORG_MESSAGE = "Please select a parent organization.";

    /**
     * {@inheritDoc}
     */
    @SuppressWarnings("unchecked")
    @Override
    public void validate(final PrincipalActionContext inActionContext) throws ValidationException
    {
        Map<String, Serializable> fields = (Map<String, Serializable>) inActionContext.getParams();

        ValidationException ve = new ValidationException();
        ValidationHelper vHelper = new ValidationHelper();

        vHelper.getAndCheckStringFieldExist(fields, DomainGroupModelView.ID_KEY, true, ve);
        vHelper.getAndCheckStringFieldExist(fields, DomainGroupModelView.SHORT_NAME_KEY, true, ve);

        String url = (String) vHelper.getAndCheckStringFieldExist(fields, DomainGroupModelView.URL_KEY, false, ve);
        vHelper.stringMeetsRequirments(DomainGroupModelView.URL_KEY, url, ve, null, null, null,
                CompositeEntity.URL_REGEX_PATTERN, DomainGroup.WEBSITE_MESSAGE);

        String parentOrgShortName = (String) vHelper.getAndCheckStringFieldExist(fields,
                DomainGroupModelView.ORG_PARENT_KEY, true, ve);
        if (vHelper.stringMeetsRequirments(DomainGroupModelView.ORG_PARENT_KEY, parentOrgShortName, ve,
                MUST_HAVE_PARENT_ORG_MESSAGE, null, null, null, null))
        {
            if (mapper.fetchUniqueResult(parentOrgShortName) == null)
            {
                ve.addError(DomainGroupModelView.ORG_PARENT_KEY, NO_SUCH_PARENT_ORG);
            }
        }

        if (fields.containsKey(DomainGroupModelView.PRIVACY_KEY))
        {
            throw new ValidationException(ValidationHelper.UNEXPECTED_DATA_ERROR_MESSAGE);
        }

        Set coordinators = (Set) vHelper.getAndCheckStringFieldExist(fields, DomainGroupModelView.COORDINATORS_KEY,
                true, ve);
        if (coordinators == null || coordinators.isEmpty())
        {
            ve.addError(DomainGroupModelView.COORDINATORS_KEY, DomainGroup.MIN_COORDINATORS_MESSAGE);
        }

        String name = (String) vHelper.getAndCheckStringFieldExist(fields, DomainGroupModelView.NAME_KEY, true, ve);
        if (name == null || name.isEmpty())
        {
            ve.addError(DomainGroupModelView.NAME_KEY, DomainGroup.NAME_REQUIRED);
        }
        else
        {
            vHelper.stringMeetsRequirments(DomainGroupModelView.NAME_KEY, name, ve, DomainGroup.NAME_LENGTH_MESSAGE,
                    DomainGroup.MAX_NAME_LENGTH, DomainGroup.NAME_LENGTH_MESSAGE, null, null);
        }

        String description = (String) vHelper.getAndCheckStringFieldExist(fields, DomainGroupModelView.DESCRIPTION_KEY,
                true, ve);
        vHelper.stringMeetsRequirments(DomainGroupModelView.DESCRIPTION_KEY, description, ve, null,
                DomainGroup.MAX_DESCRIPTION_LENGTH, DomainGroup.DESCRIPTION_LENGTH_MESSAGE, null, null);

        String keywords = (String) vHelper.getAndCheckStringFieldExist(fields, DomainGroupModelView.KEYWORDS_KEY, true,
                ve);

        if (keywords != null)
        {
            if (!vHelper.validBackgroundItems(keywords))
            {
                ve.addError(DomainGroupModelView.KEYWORDS_KEY, DomainGroupModelView.KEYWORD_MESSAGE);
            }
        }

        if (!ve.getErrors().isEmpty())
        {
            throw ve;
        }
    }

}