/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * 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.keycloak.exportimport.singlefile;

import org.jboss.logging.Logger;
import org.keycloak.Config;
import org.keycloak.exportimport.ImportProvider;
import org.keycloak.exportimport.Strategy;
import org.keycloak.exportimport.util.ExportImportSessionTask;
import org.keycloak.exportimport.util.ImportUtils;
import org.keycloak.models.KeycloakSession;
import org.keycloak.models.KeycloakSessionFactory;
import org.keycloak.models.utils.KeycloakModelUtils;
import org.keycloak.representations.idm.RealmRepresentation;
import org.keycloak.util.JsonSerialization;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Map;

/**
 * @author <a href="mailto:mposolda@redhat.com">Marek Posolda</a>
 */
public class SingleFileImportProvider implements ImportProvider {

    private static final Logger logger = Logger.getLogger(SingleFileImportProvider.class);

    private File file;

    // Allows to cache representation per provider to avoid parsing them twice
    protected Map<String, RealmRepresentation> realmReps;

    public SingleFileImportProvider(File file) {
        this.file = file;
    }

    @Override
    public void importModel(KeycloakSessionFactory factory, final Strategy strategy) throws IOException {
        logger.infof("Full importing from file %s", this.file.getAbsolutePath());
        checkRealmReps();

        KeycloakModelUtils.runJobInTransaction(factory, new ExportImportSessionTask() {

            @Override
            protected void runExportImportTask(KeycloakSession session) throws IOException {
                ImportUtils.importRealms(session, realmReps.values(), strategy);
            }

        });
    }

    @Override
    public boolean isMasterRealmExported() throws IOException {
        checkRealmReps();
        return (realmReps.containsKey(Config.getAdminRealm()));
    }

    protected void checkRealmReps() throws IOException {
        if (realmReps == null) {
            FileInputStream is = new FileInputStream(file);
            realmReps = ImportUtils.getRealmsFromStream(JsonSerialization.mapper, is);
        }
    }

    @Override
    public void importRealm(KeycloakSessionFactory factory, String realmName, Strategy strategy) throws IOException {
        // TODO: import just that single realm in case that file contains many realms?
        importModel(factory, strategy);
    }

    @Override
    public void close() {

    }
}