package cgeo.geocaching;

import cgeo.geocaching.enumerations.LogType;

import org.apache.commons.collections.CollectionUtils;

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

public final class LogEntry {
    /**
     * avoid creating new empty lists all the time using this constant. We could also return Collections.EMPTY_LIST
     * using a cast, but that might trigger static code analysis tools.
     */
    private static final List<cgImage> EMPTY_LIST = Collections.emptyList();
    public int id = 0;
    public LogType type = LogType.LOG_NOTE; // note
    public String author = "";
    public String log = "";
    public long date = 0;
    public int found = -1;
    /** Friend's log entry */
    public boolean friend = false;
    private List<cgImage> logImages = null;
    public String cacheName = ""; // used for trackables
    public String cacheGuid = ""; // used for trackables

    @Override
    public int hashCode() {
        return (int) date * type.hashCode() * author.hashCode() * log.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof LogEntry)) {
            return false;
        }
        final LogEntry otherLog = (LogEntry) obj;
        return date == otherLog.date &&
                type == otherLog.type &&
                author.compareTo(otherLog.author) == 0 &&
                log.compareTo(otherLog.log) == 0;
    }

    public void addLogImage(final cgImage image) {
        if (logImages == null) {
            logImages = new ArrayList<cgImage>();
        }
        logImages.add(image);
    }

    /**
     * @return the log images or an empty list, never <code>null</code>
     */
    public List<cgImage> getLogImages() {
        if (logImages == null) {
            return EMPTY_LIST;
        }
        return logImages;
    }

    public boolean hasLogImages() {
        return CollectionUtils.isNotEmpty(logImages);
    }
}