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package com.sun.jersey.samples.bookmark_em.resources;

import com.sun.jersey.api.NotFoundException;
import com.sun.jersey.samples.bookmark_em.entities.BookmarkEntity;
import com.sun.jersey.samples.bookmark_em.entities.BookmarkEntityPK;
import com.sun.jersey.samples.bookmark_em.entities.UserEntity;
import com.sun.jersey.samples.bookmark_em.util.tx.TransactionManager;
import com.sun.jersey.samples.bookmark_em.util.tx.Transactional;
import java.util.Date;
import javax.persistence.EntityManager;
import javax.transaction.UserTransaction;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.Produces;
import javax.ws.rs.core.UriInfo;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;

/**
 *
 * @author Jakub Podlesak, Paul Sandoz
 */
public class BookmarkResource {
    
    UriInfo uriInfo; // actual uri info provided by parent resource
    EntityManager em; // entity manager provided by parent resource
    UserTransaction utx; //user transaction provided by parent resource

    BookmarkEntity bookmarkEntity;

    /** Creates a new instance of UserResource */
    public BookmarkResource(UriInfo uriInfo, EntityManager em, 
            UserTransaction utx, UserEntity userEntity, String bmid) {
        this.uriInfo = uriInfo;
        this.em = em;
        this.utx = utx;

        bookmarkEntity = em.find(BookmarkEntity.class, 
                new BookmarkEntityPK(bmid, userEntity.getUserid()));
        if (null == bookmarkEntity) {
            throw new NotFoundException("bookmark with userid=" + 
                    userEntity.getUserid() + " and bmid=" + 
                    bmid + " not found\n");
        }
        bookmarkEntity.setUserEntity(userEntity);
    }
    
    @GET
    @Produces("application/json")
    public JSONObject getBookmark() {
        return asJson();
    }
    
    @PUT
    @Consumes("application/json")
    public void putBookmark(JSONObject jsonEntity) throws JSONException {

        bookmarkEntity.setLdesc(jsonEntity.getString("ldesc"));
        bookmarkEntity.setSdesc(jsonEntity.getString("sdesc"));
        bookmarkEntity.setUpdated(new Date());
        
        TransactionManager.manage(utx, new Transactional(em) { public void transact() {
            em.merge(bookmarkEntity);
        }});
    }    
    
    @DELETE
    public void deleteBookmark() {
        TransactionManager.manage(utx, new Transactional(em) { public void transact() {
            em.persist(bookmarkEntity);
            UserEntity userEntity = bookmarkEntity.getUserEntity();
            userEntity.getBookmarkEntityCollection().remove(bookmarkEntity);
            em.merge(userEntity);
            em.remove(bookmarkEntity);
        }});
    }    
    
    
    public String asString() {
        return toString();
    }
    
    public JSONObject asJson() {
        try {
            return new JSONObject()
            .put("userid", bookmarkEntity.getBookmarkEntityPK().getUserid())
            .put("sdesc", bookmarkEntity.getSdesc())
            .put("ldesc", bookmarkEntity.getLdesc())
            .put("uri", bookmarkEntity.getUri());
        } catch (JSONException je){
            return null;
        }
    }
    
    @Override
    public String toString() {
        return bookmarkEntity.getBookmarkEntityPK().getUserid();
    }
}
