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/*******************************************************************************
 * Copyright (c) 2015 Red Hat, Inc. Distributed under license by Red Hat, Inc.
 * All rights reserved. This program is made available under the terms of the
 * Eclipse Public License v1.0 which accompanies this distribution, and is
 * available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors: Red Hat, Inc.
 ******************************************************************************/

package com.openshift.internal.restclient.model;

import static com.openshift.internal.restclient.capability.CapabilityInitializer.initializeCapabilities;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.StringUtils;
import org.jboss.dmr.ModelNode;

import com.openshift.restclient.IClient;
import com.openshift.restclient.ResourceKind;
import com.openshift.restclient.model.IPod;
import com.openshift.restclient.model.IService;
import com.openshift.restclient.model.IServicePort;

public class Service extends KubernetesResource implements IService {

    private static final String SERVICE_SELECTOR = "spec.selector";
    private static final String SERVICE_PORT = "spec.ports";

    public Service(ModelNode node, IClient client, Map propertyKeys) {
        super(node, client, propertyKeys);
        initializeCapabilities(getModifiableCapabilities(), this, getClient());
    }

    @Override
    public void setPort(int port) {
        IServicePort lowestPort = getLowestPort();
        if (lowestPort == null) {
            lowestPort = addPort(0, 0);
        }
        lowestPort.setPort(port);
    }

    public IServicePort addPort(int port, int targetPort) {
        return addPort(port, targetPort, null);
    }

    public IServicePort addPort(int port, int targetPort, String name) {
        ServicePort servicePort = new ServicePort(get(SERVICE_PORT).add());
        if (port > 0) {
            servicePort.setPort(port);
        }
        if (targetPort > 0) {
            servicePort.setTargetPort(targetPort);
        }
        if (StringUtils.isNotEmpty(name)) {
            servicePort.setName(name);
        }
        return servicePort;
    }

    @Override
    public int getPort() {
        IServicePort port = getLowestPort();
        return port != null ? port.getPort() : 0;
    }

    private IServicePort getLowestPort() {
        List ports = getPorts();
        return ports.size() == 0 ? null : ports.get(0);
    }

    @Override
    public List getPorts() {
        return getPorts(false);
    }

    private List getPorts(boolean modifiable) {
        List ports = new ArrayList<>();
        if (!get(SERVICE_PORT).isDefined()) {
            return ports;
        }
        for (ModelNode node : get(SERVICE_PORT).asList()) {
            ports.add(new ServicePort(node));
        }
        Collections.sort(ports, new Comparator() {
            @Override
            public int compare(IServicePort first, IServicePort second) {
                Integer port0 = first.getPort();
                Integer port1 = second.getPort();
                return port0.compareTo(port1);
            }
        });
        return modifiable ? ports : Collections.unmodifiableList(ports);
    }

    @Override
    public void setPorts(List ports) {
        ModelNode portspec = get(SERVICE_PORT).clear();
        for (IServicePort port : ports) {
            new ServicePort(portspec.add(), port);
        }
    }

    @Override
    public Map getSelector() {
        return asMap(SERVICE_SELECTOR);
    }

    @Override
    public void setSelector(Map selector) {
        ModelNode node = new ModelNode();
        for (Map.Entry entry : selector.entrySet()) {
            node.get(entry.getKey()).set(entry.getValue());
        }
        get(SERVICE_SELECTOR).set(node);
    }

    @Override
    public void setSelector(String key, String value) {
        get(SERVICE_SELECTOR).get(key).set(value);
    }

    @Override
    public void setTargetPort(int port) {
        IServicePort portspec = getLowestPort();
        if (portspec == null) {
            portspec = addPort(0, 0);
        }
        portspec.setTargetPort(port);
    }

    @Override
    public String getTargetPort() {
        IServicePort port = getLowestPort();
        return port != null ? port.getTargetPort() : "0";
    }

    @Override
    @Deprecated
    public String getPortalIP() {
        String tmp = asString("spec.portalIP");
        if (StringUtils.isBlank(tmp)) {
            tmp = getClusterIP();
        }
        return tmp;
    }

    @Override
    public String getClusterIP() {
        return asString("spec.clusterIP");
    }

    @Override
    public List getPods() {
        if (getClient() == null) {
            return new ArrayList();
        }
        return getClient().list(ResourceKind.POD, getNamespaceName(), getSelector());
    }

    @Override
    public String getType() {
        return asString("spec.type");
    }

    @Override
    public void setType(String type) {
        set("spec.type", type);
    }
}