package com.ingenieux.nullweblog.util;

import java.util.HashMap;
import java.util.Map;

import javax.cache.Cache;
import javax.cache.CacheFactory;
import javax.cache.CacheManager;

import com.google.appengine.api.memcache.stdimpl.GCacheFactory;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;
import com.google.inject.Binder;
import com.google.inject.Module;
import com.googlecode.objectify.Objectify;
import com.googlecode.objectify.ObjectifyService;
import com.ingenieux.nullweblog.model.Post;
import com.ingenieux.nullweblog.model.Usuario;
import com.ingenieux.nullweblog.server.PostDao;
import com.ingenieux.nullweblog.server.UsuarioDao;

public class PersistenceModule implements Module {
	@Override
	public void configure(Binder binder) {
		configureCache(binder);
		configurePersistence(binder);
	}

	private void configureCache(Binder binder) {
		try {
			Map<Integer, Object> cacheConfig = new HashMap<Integer, Object>();

			cacheConfig.put(GCacheFactory.EXPIRATION_DELTA, 3600);

			CacheFactory cacheFactory = CacheManager.getInstance()
					.getCacheFactory();

			binder.bind(Cache.class).toInstance(
					cacheFactory.createCache(cacheConfig));
		} catch (Exception exc) {
			throw new RuntimeException(exc);
		}
	}

	private void configurePersistence(Binder binder) {
		ObjectifyService.register(Post.class);
		ObjectifyService.register(Usuario.class);

		binder.bind(UserService.class).toInstance(
				UserServiceFactory.getUserService());

		binder.bind(Objectify.class).toInstance(ObjectifyService.begin());

		binder.bind(PostDao.class).toInstance(new PostDao());
		binder.bind(UsuarioDao.class).toInstance(new UsuarioDao());
	}
}