package org.hedgewars.hedgeroid.Downloader;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.IOException;

import org.hedgewars.hedgeroid.MainActivity;

import org.hedgewars.hedgeroid.R;

import org.hedgewars.hedgeroid.Utils;

import org.hedgewars.hedgeroid.Datastructures.Scheme;

import org.hedgewars.hedgeroid.Datastructures.Team;

import org.hedgewars.hedgeroid.Datastructures.Weapon;

import android.content.res.AssetManager;

import android.os.AsyncTask;

import android.util.Log;

public class DownloadAssets extends AsyncTask<Object, Long, Boolean> {

	private static final String VERSION_FILENAME = "assetsversion.txt";

	private final MainActivity act;

	public DownloadAssets(MainActivity act){

		this.act = act;

	}

	private void copyFileOrDir(AssetManager assetManager, File target, String assetPath) throws IOException {

		try {

			Utils.writeStreamToFile(assetManager.open(assetPath), target);

		} catch(FileNotFoundException e) {

			/*

			 * I can't find a better way to figure out whether an asset entry is

			 * a file or a directory. Checking if assetManager.list(assetPath)

			 * is empty is a bit cleaner, but SLOW.

			 */

			if (!target.isDirectory() && !target.mkdir()) {

				throw new IOException("Unable to create directory "+target);

			}

			for (String asset : assetManager.list(assetPath)) {

				copyFileOrDir(assetManager, new File(target, asset), assetPath + "/" + asset);

			}

		}

	}

	@Override

	protected Boolean doInBackground(Object... params) {

		try {

			Utils.resRawToFilesDir(act, R.array.weapons, Weapon.DIRECTORY_WEAPON);

			Utils.resRawToFilesDir(act, R.array.teams, Team.DIRECTORY_TEAMS);

			copyFileOrDir(act.getAssets(), Utils.getDataPathFile(act), "Data");

			copyFileOrDir(act.getAssets(), new File(Utils.getCachePath(act), VERSION_FILENAME), VERSION_FILENAME);

			return Boolean.TRUE;

		} catch(IOException e) {

			Log.e("DownloadAssets", e.getMessage(), e);

			return Boolean.FALSE;

		}

	}

	@Override

	protected void onPostExecute(Boolean result){

		act.onAssetsDownloaded(result);

	}

}