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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.bluenimble.platform.api.impls;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;

import com.bluenimble.platform.Lang;
import com.bluenimble.platform.api.ApiOutput;
import com.bluenimble.platform.api.ApiResource;
import com.bluenimble.platform.json.JsonObject;
import com.bluenimble.platform.streams.Chunk;
import com.bluenimble.platform.streams.StreamDecorator;

public class ResourceApiOutput implements ApiOutput {
	
	private static final long serialVersionUID = 6109917905133029178L;

	private ApiResource	resource;
	private JsonObject 	meta;

	public ResourceApiOutput (ApiResource resource) {
		this.resource = resource;
	}

	@Override
	public String name () {
		return resource.name ();
	}

	@Override
	public Date timestamp () {
		return resource.timestamp ();
	}

	@Override
	public String contentType () {
		return resource.contentType ();
	}

	@Override
	public String extension () {
		return resource.extension ();
	}

	@Override
	public JsonObject data () {
		return (JsonObject)new JsonObject ()
					.set (Defaults.Id, resource.name ())
					.set (Defaults.Timestamp, Lang.toUTC (timestamp ()));
	}

	@Override
	public void pipe (OutputStream out, long position, long count) throws IOException {
		resource.pipe (out, position, count);
	}

	@Override
	public void pipe (OutputStream out, StreamDecorator decorator, Chunk... chunks) throws IOException {
		resource.pipe (out, decorator, chunks);
	}

	@Override
	public InputStream toInput () throws IOException {
		return resource.toInput ();
	}

	@Override
	public long length () {
		return resource.length ();
	}

	@Override
	public JsonObject meta () {
		return meta;
	}
	
	@Override
	public ApiOutput set (String key, Object value) {
		if (meta == null) {
			meta = new JsonObject ();
		}
		meta.set (key, value);
		return this;
	}

	@Override
	public ApiOutput unset (String key) {
		if (meta == null) {
			return this;
		}
		meta.remove (key);
		return this;
	}

	@Override
	public Object get (String key) {
		if (meta == null) {
			return null;
		}
		return meta.get (key);
	}

}