package org.biopax.paxtools.query.wrapperL3undirected;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.biopax.paxtools.model.BioPAXElement;
import org.biopax.paxtools.model.BioPAXLevel;
import org.biopax.paxtools.model.Model;
import org.biopax.paxtools.model.level3.*;
import org.biopax.paxtools.query.model.AbstractGraph;
import org.biopax.paxtools.query.model.GraphObject;
import org.biopax.paxtools.query.model.Node;
import org.biopax.paxtools.query.wrapperL3.Filter;

import java.util.*;

/**
 * Wrapper for L3 Graphs.
 *
 * @author Ozgun Babur
 */
public class GraphL3Undirected extends AbstractGraph
{
        /**
         * The model to be wrapped.
         */
        protected Model model;

        protected List<Filter> filters;

        /**
         * Log for logging.
         */
        protected final Log log = LogFactory.getLog(GraphL3Undirected.class);

        /**
         * Constructor with the model and the IDs of the ubiquitous molecules. IDs can be null, meaning
         * no labeling is desired.
         * @param model Model to wrap
         * @param filters for filtering graph elements
         */
        public GraphL3Undirected(Model model, Filter... filters)
        {
                assert model.getLevel() == BioPAXLevel.L3;
                this.model = model;

                if (filters.length > 0)
                {
                        this.filters = Arrays.asList(filters);
                }
        }

        /**
         * There must be no filter opposing to traverse this object to traverse it.
         * @param ele element to check
         * @return true if ok to traverse
         */
        private boolean passesFilters(Level3Element ele)
        {
                if (filters == null) return true;

                for (Filter filter : filters)
                {
                        if (!filter.okToTraverse(ele)) return false;
                }
                return true;
        }

        /**
         * This method creates a wrapper for every wrappable L3 element.
         * @param obj Object to wrap
         * @return The wrapper
         */
        @Override
        public Node wrap(Object obj)
        {
                // Check if the object is level3
                if (!(obj instanceof Level3Element)) throw new IllegalArgumentException(
                        "An object other than a Level3Element is trying to be wrapped: " + obj);

                // Check if the object passes the filter
                if (!passesFilters((Level3Element) obj)) return null;

                // Wrap if traversible

                if (obj instanceof PhysicalEntity)
                {
                        return new PhysicalEntityWrapper((PhysicalEntity) obj, this);
                }
                else if (obj instanceof Control)
                {
                        return new ControlWrapper((Control) obj, this);
                }
                else if (obj instanceof Interaction)
                {
                        return new InteractionWrapper((Interaction) obj, this);
                }
                else
                {
                        if (log.isWarnEnabled())
                        {
                                log.warn("Invalid BioPAX object to wrap as node. Ignoring: " + obj);
                        }
                        return null;
                }
        }

        /**
         * RDF IDs of elements is used as key in the object map.
         * @param wrapped Object to wrap
         * @return Key
         */
        @Override
        public String getKey(Object wrapped)
        {
                if (wrapped instanceof BioPAXElement)
                {
                        return ((BioPAXElement) wrapped).getRDFId();
                }

                throw new IllegalArgumentException("Object cannot be wrapped: " + wrapped);
        }

        /**
         * Gets wrappers of given elements
         * @param objects Wrapped objects
         * @return wrappers
         */
        public Set<Node> getWrapperSet(Set<?> objects)
        {
                Set<Node> wrapped = new HashSet<Node>();

                for (Object object : objects)
                {
                        Node node = (Node) getGraphObject(object);
                        if (node != null)
                        {
                                wrapped.add(node);
                        }
                }
                return wrapped;
        }

        /**
         * Gets an element-to-wrapper map for the given elements.
         * @param objects Wrapped objects
         * @return object-to-wrapper map
         */
        public Map<Object, Node> getWrapperMap(Set<?> objects)
        {
                Map<Object, Node> map = new HashMap<Object, Node>();

                for (Object object : objects)
                {
                        Node node = (Node) getGraphObject(object);
                        if (node != null)
                        {
                                map.put(object, node);
                        }
                }
                return map;
        }

        /**
         * Gets the wrapped objects of the given wrappers.
         * @param wrappers Wrappers
         * @return Wrapped objects
         */
        public Set<Object> getWrappedSet(Set<? extends GraphObject> wrappers)
        {
                Set<Object> objects = new HashSet<Object>();

                for (GraphObject wrapper : wrappers)
                {
                        if (wrapper instanceof PhysicalEntityWrapper)
                        {
                                objects.add(((PhysicalEntityWrapper) wrapper).getPhysicalEntity());
                        }
                        else if (wrapper instanceof ControlWrapper)
                        {
                                objects.add(((ControlWrapper) wrapper).getControl());
                        }
                        else if (wrapper instanceof InteractionWrapper)
                        {
                                objects.add(((InteractionWrapper) wrapper).getInteraction());
                        }
                }
                return objects;
        }

        /**
         * @return Wrapped model
         */
        public Model getModel()
        {
                return model;
        }
}