// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.command.conflict;

import static org.openstreetmap.josm.tools.I18n.tr;

import java.util.Collection;
import java.util.List;
import java.util.Objects;

import javax.swing.Icon;

import org.openstreetmap.josm.data.conflict.Conflict;
import org.openstreetmap.josm.data.osm.Node;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.data.osm.Way;
import org.openstreetmap.josm.tools.ImageProvider;
import org.openstreetmap.josm.tools.Logging;

/**
 * Represents the resolution of conflicts in the node list of two {@link Way}s.
 *
 */
public class WayNodesConflictResolverCommand extends ConflictResolveCommand {
    /** the conflict to resolve */
    private final Conflict<Way> conflict;

    /** the list of merged nodes. This becomes the list of news of my way after the
     *  command is executed
     */
    private final List<Node> mergedNodeList;

    /**
     * Constructs a new {@code WayNodesConflictResolverCommand}.
     * @param conflict the conflict data set
     * @param mergedNodeList the list of merged nodes
     */
    @SuppressWarnings("unchecked")
    public WayNodesConflictResolverCommand(Conflict<? extends OsmPrimitive> conflict, List<Node> mergedNodeList) {
        super(conflict.getMy().getDataSet());
        this.conflict = (Conflict<Way>) conflict;
        this.mergedNodeList = mergedNodeList;
    }

    @Override
    public String getDescriptionText() {
        return tr("Resolve conflicts in node list of way {0}", conflict.getMy().getId());
    }

    @Override
    public Icon getDescriptionIcon() {
        return ImageProvider.get("data", "object");
    }

    @Override
    public boolean executeCommand() {
        // remember the current state of 'my' way
        //
        super.executeCommand();

        // replace the list of nodes of 'my' way by the list of merged nodes
        //
        for (Node n:mergedNodeList) {
            if (!getAffectedDataSet().getNodes().contains(n)) {
                Logging.warn(tr("Main dataset does not include node {0}", n.toString()));
            }
        }
        conflict.getMy().setNodes(mergedNodeList);
        rememberConflict(conflict);
        return true;
    }

    @Override
    public void fillModifiedData(Collection<OsmPrimitive> modified, Collection<OsmPrimitive> deleted,
            Collection<OsmPrimitive> added) {
        modified.add(conflict.getMy());
    }

    @Override
    public int hashCode() {
        return Objects.hash(super.hashCode(), conflict, mergedNodeList);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null || getClass() != obj.getClass()) return false;
        if (!super.equals(obj)) return false;
        WayNodesConflictResolverCommand that = (WayNodesConflictResolverCommand) obj;
        return Objects.equals(conflict, that.conflict) &&
                Objects.equals(mergedNodeList, that.mergedNodeList);
    }
}