package com.sun.ws.rest.samples.atomserver.resources;

import com.sun.syndication.feed.atom.Entry;
import com.sun.syndication.feed.atom.Feed;
import com.sun.syndication.feed.atom.Link;
import com.sun.ws.rest.api.ConsumeMime;
import com.sun.ws.rest.api.Entity;
import com.sun.ws.rest.api.HttpMethod;
import com.sun.ws.rest.api.ProduceMime;
import com.sun.ws.rest.api.UriParam;
import com.sun.ws.rest.api.UriTemplate;
import com.sun.ws.rest.api.core.HttpContext;
import java.util.Date;
import java.util.List;
import javax.annotation.Resource;

/**
 *
 * @author Paul.Sandoz@Sun.Com
 */
@UriTemplate("edit/{entry}")
@ConsumeMime("application/atom+xml")
@ProduceMime("application/atom+xml")
public class EditEntryResource extends EntryResource {
    @Resource HttpContext context;
    
    @HttpMethod
    public void putEntry(@UriParam("entry") String entryId,
            Entry e) {
        String entryFilePath = FileHelper.getEntryPath(entryId);
        FileHelper.checkExistence(entryFilePath);

        String entryUri = getUri(entryId);
        String editEntryUri = getUri("edit/" + entryId);
        
        updateLink(e, "self", entryUri);
        updateLink(e, "edit", editEntryUri);
        if (FileHelper.hasMedia(entryId)) {
            String mediaUri = getUri(entryId + "/media");
            String editMediaUri = getUri("edit/" + entryId + "/media");
            
            updateLink(e, "edit-media", editMediaUri);        
        }
        e.setId(entryId);

        // Write out the entry document 
        FileHelper.createEntryDocument(entryId, e);

        // Update the feed document with the entry
        Feed f = FileHelper.getFeedDocument();
        FileHelper.updateFeedDocumentWithExistingEntry(f, e);
    }

    private void updateLink(Entry e, String rel, String uri) {
        List links = e.getOtherLinks();
        
        Link l = null;
        for (Object o : links) {
            l = (Link)o;
            if (l.getRel().equals(rel)) {
                links.remove(l);
                break;
            }
        }
        
        l = new Link();
        l.setRel(rel);
        l.setHref(uri);
        links.add(l);
    }    
    
    private String getUri(String path) {
        return context.getHttpRequestContext().getBaseURI() + "collection/" + path;
    }
    
    @HttpMethod
    public void deleteEntry(@UriParam("entry") String entryId) {
        String path = FileHelper.getPath(entryId);
        FileHelper.checkExistence(path);
        
        String entryPath = FileHelper.getEntryPath(entryId);
        String mediaPath = FileHelper.getMediaPath(entryId);
        FileStore.FS.deleteFile(mediaPath);
        FileStore.FS.deleteFile(entryPath);
        FileStore.FS.deleteFile(path);
        
        Feed f = FileHelper.getFeedDocument();
        FileHelper.updateFeedDocumentRemovingEntry(f, entryId);
    }
    
    
    @HttpMethod
    @UriTemplate("media")
    @ConsumeMime("*/*")
    public void putMedia(@UriParam("entry") String entryId,
            Entity<byte[]> update) {
        String mediaPath = FileHelper.getMediaPath(entryId);
        FileHelper.checkExistence(mediaPath);

        Feed f = FileHelper.getFeedDocument();
        Entry e = FileHelper.findEntry(entryId, f);
        // Update the entry
        e.setUpdated(new Date());
        // Write out the feed document
        FileHelper.updateFeedDocument(f);
        
        // Write out the entry document
        FileHelper.createEntryDocument(entryId, e);
        // Write out the media
        FileHelper.createMediaDocument(entryId, update.getContent());
    }
    
}