/*
 * Copyright (C) 2009 Teleca Poland Sp. z o.o. <android@teleca.com>
 *
 * Licensed 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.teleca.jamendo.util.download;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import org.json.JSONException;

import com.teleca.jamendo.MyApplication;
import com.teleca.jamendo.api.IServerApi;
import com.teleca.jamendo.api_impl.ServerApiImpl;
import com.teleca.jamendo.model.Playlist;
import com.teleca.jamendo.model.Track;
import com.teleca.jamendo.model.ErrorMsg;

import android.os.AsyncTask;
import android.util.Log;


/**
 * File download thread
 * 
 * @author Lukasz Wisniewski
 */
public class DownloadAsyncTask extends AsyncTask<Void, Integer, Boolean>{

	DownloadJob mJob;
	
	public DownloadAsyncTask(DownloadJob job){
		mJob = job;
	}
	
	@Override
	public void onPreExecute() {
		mJob.notifyDownloadStarted();
		super.onPreExecute();
	}

	@Override
	public Boolean doInBackground(Void... params) {
		// ogg support
		if(mJob.getFormat().equals(IServerApi.ENCODING_OGG)){
			Log.i(MyApplication.TAG, "Getting path for ogg");
			int track_id = mJob.getPlaylistEntry().getTrack().getId();
			IServerApi api = new ServerApiImpl();
			try {
				Track track[] = api.getTracksByTracksId(new int[]{track_id}, mJob.getFormat());
				if(track == null || track.length != 1){
					return false;
				} else {
					mJob.getPlaylistEntry().setTrack(track[0]);
				}
			} catch (JSONException e) {
				return false;
			} catch (ErrorMsg e) {
				return false;
			}
		}
		
		try {
			return downloadFile(mJob);
		} catch (IOException e) {
			return false;
		}
	}

	@Override
	public void onPostExecute(Boolean result) {
		mJob.notifyDownloadEnded();
		super.onPostExecute(result);
	}

	public static Boolean downloadFile(DownloadJob job) throws IOException{
		
		// TODO rewrite to apache client
		
		Playlist mPlaylistEntry = job.getPlaylistEntry();
		String mDestination = job.getDestination();
		
		URL u = new URL(mPlaylistEntry.getTrack().getStream());
		HttpURLConnection c = (HttpURLConnection) u.openConnection();
		c.setRequestMethod("GET");
		c.setDoOutput(true);
		c.connect();
		job.setTotalSize(c.getContentLength());

		Log.i(MyApplication.TAG, "creating file");
		
		String path = DownloadHelper.getAbsolutePath(mPlaylistEntry, mDestination);
		String fileName = DownloadHelper.getFileName(mPlaylistEntry, job.getFormat());


		try{
			// Create multiple directory
			boolean success = (new File(path)).mkdirs();
			if (success) {
				Log.i(MyApplication.TAG, "Directory: " + path + " created");
			}    

		}catch (Exception e){//Catch exception if any
			Log.e(MyApplication.TAG, "Error creating folder", e);
			return false;
		}

		FileOutputStream f = new FileOutputStream(new File(path, fileName));


		InputStream in = c.getInputStream();

		byte[] buffer = new byte[1024];
		int lenght = 0;
		while ( (lenght = in.read(buffer)) > 0 ) {
			f.write(buffer,0, lenght);
			job.setDownloadedSize(job.getDownloadedSize()+lenght);
		}

		f.close();
		return true;
		
	}

}