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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.component.openstack.common;

import org.apache.camel.Component;
import org.apache.camel.Consumer;
import org.apache.camel.Processor;
import org.apache.camel.support.DefaultEndpoint;
import org.openstack4j.api.OSClient;
import org.openstack4j.api.client.IOSClientBuilder;
import org.openstack4j.core.transport.Config;
import org.openstack4j.model.common.Identifier;
import org.openstack4j.openstack.OSFactory;

public abstract class AbstractOpenstackEndpoint extends DefaultEndpoint {

    public static final String V2 = "V2";
    public static final String V3 = "V3";

    protected AbstractOpenstackEndpoint(String endpointUri, Component component) {
        super(endpointUri, component);
    }

    protected abstract String getHost();

    protected abstract String getUsername();

    protected abstract String getDomain();

    protected abstract String getPassword();

    protected abstract String getProject();

    protected abstract String getOperation();

    protected abstract Config getConfig();

    protected abstract String getApiVersion();

    protected OSClient createClient() {

        //client should reAuthenticate itself when token expires
        if (V2.equals(getApiVersion())) {
            return createV2Client();
        }

        return createV3Client();
    }

    @Override
    public Consumer createConsumer(Processor processor) throws Exception {
        throw new IllegalStateException("There is no consumer available for OpenStack");
    }

    private OSClient.OSClientV3 createV3Client() {
        IOSClientBuilder.V3 builder = OSFactory.builderV3()
                .endpoint(getHost());

        builder.credentials(getUsername(), getPassword(), Identifier.byName(getDomain()));

        if (getProject() != null) {
            builder.scopeToProject(Identifier.byId(getProject()));
        }

        if (getConfig() != null) {
            builder.withConfig(getConfig());
        }

        return builder.authenticate();
    }

    private OSClient.OSClientV2 createV2Client() {
        IOSClientBuilder.V2 builder = OSFactory.builderV2()
                .endpoint(getHost());

        builder.credentials(getUsername(), getPassword());

        builder.tenantId(getProject());

        if (getConfig() != null) {
            builder.withConfig(getConfig());
        }

        return builder.authenticate();
    }
}