/*
 * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are 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
 */

package org.opendaylight.controller.switchmanager;

import java.io.Serializable;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;

import org.opendaylight.controller.configuration.ConfigurationObject;
import org.opendaylight.controller.sal.core.Node;
import org.opendaylight.controller.sal.core.NodeConnector;
import org.opendaylight.controller.sal.utils.GUIField;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The class represents a Span Port configuration for a network node.
 */
public class SpanConfig extends ConfigurationObject implements Serializable {
    protected static final Logger logger = LoggerFactory
    .getLogger(SpanConfig.class);
    private static final long serialVersionUID = 1L;
    private static final String guiFields[] = { GUIField.NODE.toString(),
            GUIField.SPANPORTS.toString() };

    // Order matters: JSP file expects following fields in the following order
    private String nodeId;
    private String spanPort;

    public SpanConfig() {
    }

    public String getNodeId() {
        return nodeId;
    }

    public String getSpanPort() {
        return spanPort;
    }

    public Node getNode() {
        return Node.fromString(nodeId);
    }

    private boolean hasValidNodeId() {
        return (getNode() != null);
    }

    private boolean hasValidSpanPort() {
        return (spanPort != null && !spanPort.isEmpty());
    }

    public boolean isValidConfig() {
        return (hasValidNodeId() && hasValidSpanPort());
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((nodeId == null) ? 0 : nodeId.hashCode());
        result = prime * result
                + ((spanPort == null) ? 0 : spanPort.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        SpanConfig other = (SpanConfig) obj;
        if (nodeId == null) {
            if (other.nodeId != null) {
                return false;
            }
        } else if (!nodeId.equals(other.nodeId)) {
            return false;
        }
        if (spanPort == null) {
            if (other.spanPort != null) {
                return false;
            }
        } else if (!spanPort.equals(other.spanPort)) {
            return false;
        }
        return true;
    }

    public static ArrayList<String> getFieldsNames() {
        ArrayList<String> fieldList = new ArrayList<String>();
        for (Field fld : SpanConfig.class.getDeclaredFields()) {
            fieldList.add(fld.getName());
        }
        //remove the two static fields
        for (short i = 0; i < 2; i++) {
            fieldList.remove(0);
        }
        return fieldList;
    }

    public static List<String> getGuiFieldsNames() {
        List<String> fieldList = new ArrayList<String>();
        for (String str : guiFields) {
            fieldList.add(str);
        }
        return fieldList;
    }

    public ArrayList<NodeConnector> getPortArrayList() {
        ArrayList<NodeConnector> portList = new ArrayList<NodeConnector>();
        String[] elemArray = spanPort.split(",");
        for (String elem : elemArray) {
            NodeConnector nodeConnector = NodeConnector.fromString(elem);
            if (nodeConnector != null) {
                portList.add(nodeConnector);
            }
        }
        return portList;
    }

    public boolean matchNode(String nodeId) {
        return this.nodeId.equals(nodeId);
    }

    @Override
    public String toString() {
        return ("SpanConfig [nodeId=" + nodeId + ", spanPort=" + spanPort + "]");
    }
}