/*

 * Hedgewars for Android. An Android port of Hedgewars, a free turn based strategy game

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 */

package org.hedgewars.hedgeroid;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.ArrayList;

import java.util.List;

import android.content.Context;

import android.content.res.TypedArray;

import android.os.Build;

import android.os.Environment;

import android.util.Log;

public class Utils {

	private static final String ROOT_DIR = "Data/";

	/**

	 * get the path to which we should download all the data files

	 * @param c context 

	 * @return absolute path

	 */

	public static String getCachePath(Context c){

		if(Build.VERSION.SDK_INT < 8){//8 == Build.VERSION_CODES.FROYO

			return PreFroyoSDCardDir.getDownloadPath(c) + '/';

		}else{

			return FroyoSDCardDir.getDownloadPath(c) + '/';

		}

	}

	public static String getDataPath(Context c){

		return getCachePath(c) + ROOT_DIR;

	}

	static class FroyoSDCardDir{

		public static String getDownloadPath(Context c){

			File f =  c.getExternalCacheDir();

			if(f != null){

				return f.getAbsolutePath();

			}else{

				return null;

			}	

		}

	}

	static class PreFroyoSDCardDir{

		public static String getDownloadPath(Context c){

			if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){

				if(Environment.getExternalStorageDirectory() != null)

					return Environment.getExternalStorageDirectory().getAbsolutePath() + "/Hedgewars/";				

			}

			return null;

		}

	}

	/**

	 * Get files from dirName, dir name is relative to {@link getDownloadPath}

	 * @param dirName

	 * @param c context

	 * @return string of files

	 */

	public static String[] getFileNamesFromRelativeDir(Context c, String dirName){

		String prefix = getDataPath(c);

		File f = new File(prefix + dirName);

		if(f.exists() && f.isDirectory()) return f.list();

		else{

			Log.e("Utils::", "Couldn't find dir: " + dirName);

			return new String[0];

		}

	}

	/**

	 * Return a File array with all the files from dirName

	 * @param c

	 * @param dirName

	 * @return

	 */

	public static File[] getFilesFromRelativeDir(Context c, String dirName){

		String prefix = getDataPath(c);

		File f = new File(prefix + dirName);

		if(f.exists() && f.isDirectory()) return f.listFiles();

		else {

			Log.e("Utils::", "Dir not found: " + dirName);

			return new File[0];

		}

	}

	/**

	 * Checks if this directory has a file with suffix suffix

	 * @param f - directory

	 * @return

	 */

	public static boolean hasFileWithSuffix(File f, String suffix){

		if(f.isDirectory()){

			for(String s : f.list()){

				if(s.endsWith(suffix)) return true;

			}

			return false;

		}else{

			return false;

		}

	}

	/**

	 * Gives back all dirs which contain a file with suffix fileSuffix

	 * @param c

	 * @param path

	 * @param fileSuffix

	 * @return

	 */

	public static List<String> getDirsWithFileSuffix(Context c, String path, String fileSuffix){

		File[] files = getFilesFromRelativeDir(c,path);

		ArrayList<String> ret = new ArrayList<String>();

		for(File f : files){

			if(hasFileWithSuffix(f, fileSuffix)) ret.add(f.getName());

		}

		return ret;

	}

	/**

	 * Get all files from directory dir which have the given suffix

	 * @param c

	 * @param dir

	 * @param suffix

	 * @param removeSuffix

	 * @return

	 */

	public static ArrayList<String> getFilesFromDirWithSuffix(Context c, String dir, String suffix, boolean removeSuffix){

		String[] files = Utils.getFileNamesFromRelativeDir(c, dir);

		ArrayList<String> ret = new ArrayList<String>();

		for(String s : files){

			if(s.endsWith(suffix)){

				if(removeSuffix) ret.add(s.substring(0, s.length()-suffix.length()));

				else ret.add(s);

			}

		}

		return ret;

	}

	/**

	 * Moves resources pointed to by sourceResId (from @res/raw/) to the app's private data directory

	 * @param c

	 * @param sourceResId

	 * @param directory

	 */

	public static void resRawToFilesDir(Context c, int sourceResId, String directory){

		byte[] buffer = new byte[1024];

		InputStream bis = null;

		BufferedOutputStream bos = null;

		File schemesDirFile = new File(c.getFilesDir().getAbsolutePath() + '/' + directory);

		schemesDirFile.mkdirs();

		String schemesDirPath = schemesDirFile.getAbsolutePath() + '/';

		//Get an array with the resource files ID

		TypedArray ta = c.getResources().obtainTypedArray(sourceResId);

		int[] resIds = new int[ta.length()];

		for(int i = 0; i < ta.length(); i++){

			resIds[i] = ta.getResourceId(i, 0);

		}

		for(int id : resIds){

			String fileName = c.getResources().getResourceEntryName(id);

			File f = new File(schemesDirPath + fileName);

			try {

				if(!f.createNewFile()){

					f.delete();

					f.createNewFile();

				}

				bis = c.getResources().openRawResource(id);

				bos = new BufferedOutputStream(new FileOutputStream(f), 1024);

				int read = 0;

				while((read = bis.read(buffer)) != -1){

					bos.write(buffer, 0, read);

				}

			} catch (IOException e) {

				e.printStackTrace();

			}finally{

				if(bis != null)

					try { 

						bis.close();

					} catch (IOException e) {

						e.printStackTrace();

					}

					if(bos != null)

						try {

							bos.close();

						} catch (IOException e) {

							e.printStackTrace();

						}

			}

		}

	}

}