package net.onrc.onos.core.intent;

import net.onrc.onos.ofcontroller.networkgraph.NetworkGraph;
import net.onrc.onos.ofcontroller.networkgraph.NetworkGraphImpl;
import net.onrc.onos.ofcontroller.networkgraph.Link;
import net.onrc.onos.ofcontroller.networkgraph.LinkImpl;
import net.onrc.onos.ofcontroller.networkgraph.Port;
import net.onrc.onos.ofcontroller.networkgraph.Switch;
import net.onrc.onos.ofcontroller.networkgraph.SwitchImpl;

/**
 * A mock class of NetworkGraph.
 * This class should be used only by test codes.
 *
 * @author Toshio Koide (t-koide@onlab.us)
 */
public class MockNetworkGraph extends NetworkGraphImpl {
	public static Long LOCAL_PORT = 0xFFFEL;
	public SwitchImpl sw1, sw2, sw3, sw4;

	class DetachableLinkImpl extends LinkImpl {
		public DetachableLinkImpl(NetworkGraph graph, Port srcPort, Port dstPort) {
			super(graph, srcPort, dstPort);
		}

		public void detachFromGraph() {
			unsetFromPorts();
		}
	}
	public Switch addSwitch(Long switchId) {
		SwitchImpl sw = new SwitchImpl(this, switchId);
		this.putSwitch(sw);
		return sw;
	}

	public Link addLink(Long srcDpid, Long srcPortNo, Long dstDpid, Long dstPortNo) {
		return new DetachableLinkImpl(
				this,
				getSwitch(srcDpid).getPort(srcPortNo),
				getSwitch(dstDpid).getPort(dstPortNo));
	}

	public Link[] addBidirectionalLinks(Long srcDpid, Long srcPortNo, Long dstDpid, Long dstPortNo) {
		Link[] links = new Link[2];
		links[0] = addLink(srcDpid, srcPortNo, dstDpid, dstPortNo);
		links[1] = addLink(dstDpid, dstPortNo, srcDpid, srcPortNo);

		return links;
	}

	/**
	 * create sample topology of 4 switches and 5 bidirectional links.
	 * <pre>
	 * [1] --- [2]
	 *  |    /  |
	 *  |  /    |
	 * [4] --- [3]
	 * </pre>
	 */
	public void createSampleTopology1() {
		sw1 = (SwitchImpl) addSwitch(1L);
		sw1.addPort(LOCAL_PORT);
		sw2 = (SwitchImpl) addSwitch(2L);
		sw2.addPort(LOCAL_PORT);
		sw3 = (SwitchImpl) addSwitch(3L);
		sw3.addPort(LOCAL_PORT);
		sw4 = (SwitchImpl) addSwitch(4L);
		sw4.addPort(LOCAL_PORT);

		sw1.addPort(12L); // sw1 -> sw2
		sw1.addPort(14L); // sw1 -> sw4
		sw2.addPort(21L); // sw2 -> sw1
		sw2.addPort(23L); // sw2 -> sw3
		sw2.addPort(24L); // sw2 -> sw4
		sw3.addPort(32L); // sw3 -> sw2
		sw3.addPort(34L); // sw3 -> sw4
		sw4.addPort(41L); // sw4 -> sw1
		sw4.addPort(42L); // sw4 -> sw2
		sw4.addPort(43L); // sw4 -> sw3

		addBidirectionalLinks(1L, 12L, 2L, 21L);
		addBidirectionalLinks(2L, 23L, 3L, 32L);
		addBidirectionalLinks(3L, 34L, 4L, 43L);
		addBidirectionalLinks(4L, 41L, 1L, 14L);
		addBidirectionalLinks(2L, 24L, 4L, 42L);

		// set capacity of all links to 1000Mbps
		for (Link link: getLinks()) {
			((LinkImpl)link).setCapacity(1000.0);
		}
	}

	public void removeLink(Long srcDpid, Long srcPortNo, Long dstDpid, Long dstPortNo) {
		DetachableLinkImpl link = (DetachableLinkImpl)getSwitch(srcDpid).getPort(srcPortNo).getOutgoingLink();
		if (link.getDstSwitch().getDpid().equals(dstDpid) && link.getDstPort().getNumber().equals(dstPortNo)) {
			link.detachFromGraph();
		}
	}
}