package dk.thoerup.traininfo;



import java.io.InvalidClassException;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.Toast;

import com.nullwire.trace.ExceptionHandler;

import dk.thoerup.androidutils.CheckUpdates;
import dk.thoerup.traininfo.provider.OfflineStationProvider;
import dk.thoerup.traininfo.provider.ProviderFactory;
import dk.thoerup.traininfo.provider.StationProvider;


public class WelcomeScreen extends Activity{
	
	final static String stationsreload = "stationsreload";
	final static int MENU_SETTINGS = 1;
	final static int MENU_RELOAD = 2;
	
	
	public enum ListType {
		ListNearest,
		ListSearch,
		ListFavorites
	}
	
	Handler handler = new Handler();
	
	SharedPreferences prefs;
	
	StationLoader stationLoader;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		
		super.onCreate(savedInstanceState);
		
		prefs = getSharedPreferences("TrainStation", 0);
		
		requestWindowFeature( Window.FEATURE_NO_TITLE );
		setContentView(R.layout.welcome);
		
		Button nearestButton = (Button) findViewById(R.id.nearest);
		nearestButton.setOnClickListener( new StationListListener(ListType.ListNearest));
		
		Button searchButton = (Button) findViewById(R.id.search);
		searchButton.setOnClickListener( new StationListListener(ListType.ListSearch));
		
		Button favoritesButton = (Button) findViewById(R.id.favorites);
		favoritesButton.setOnClickListener( new StationListListener(ListType.ListFavorites));
		
		Button aboutButton = (Button) findViewById(R.id.about);
		aboutButton.setOnClickListener( new AboutListener() );
	
		//Got stacktraces / reports that the register thing sometimes crashes
		try {	
			ExceptionHandler.register(this, "http://t-hoerup.dk/android/trace.php");
		} catch (Exception e) {
			Log.e("TrainInfo", "Error registering exception handler", e);
		}
		
		CheckUpdates update = new CheckUpdates();
		update.checkForUpdates(this, "http://t-hoerup.dk/android/traininfo/version.txt", "TrainInfo DK", null);
		/*
		Runnable r = new Runnable() {
			@Override
			public void run() {
				View splash = findViewById(R.id.splash);
				splash.setVisibility(View.GONE);
			}
		};		
		handler.postDelayed(r, 1500);
		*/
		
		StationProvider sp = ProviderFactory.getStationProvider();
		
		if (sp instanceof OfflineStationProvider ) {
			OfflineStationProvider osp = (OfflineStationProvider) sp;
			long last = prefs.getLong(stationsreload, 0);
			long now = System.currentTimeMillis();
			Log.i("TrainInfo", "Last Load: " + last);

			boolean didLoad = false;

			try {
				didLoad = osp.loadStations(this);
			}												
			catch (InvalidClassException e) {
				Log.i("TrainInfo", "invalid class - do a new download of stationlist");
			}
			catch (Exception e) {
				Toast.makeText(this, "" + e.getMessage(), Toast.LENGTH_SHORT).show();
				Log.e("TrainInfo", "load error", e);
			}

			if (didLoad == false) {					
				stationLoader = new StationLoader(osp, false);
				stationLoader.execute( (Void)null);
			} else {
				if ( (now-last) > (14*24*60*60*1000) ) { //if we had a stations list but it was too old, load a new one silent
					Log.i("TrainInfo", "Stationlist too old, do a silent download");
					stationLoader = new StationLoader(osp, true); 
					stationLoader.execute( (Void)null);
				}
			}

		}
	}


		
	@Override
	protected void onDestroy() {
		super.onDestroy();
		if (stationLoader != null) {
			stationLoader.cancel(true);
		}
		
		ProviderFactory.purgeOldEntries(); //exiting application, do some cleanup
	}


	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		MenuItem item;
		
		item = menu.add(0, MENU_SETTINGS, 0, getString(R.string.welcome_settings) );
		item.setIcon(android.R.drawable.ic_menu_preferences);
		
		item = menu.add(0, MENU_RELOAD, 0, getString(R.string.welcome_reloadstations));
		item.setIcon(android.R.drawable.ic_menu_rotate);
		
		return true;
	}
	
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		boolean retval = true;
		
		switch (item.getItemId()) {
		case MENU_SETTINGS:
			Intent intent = new Intent(WelcomeScreen.this, SettingsScreen.class);
			WelcomeScreen.this.startActivity(intent);
			break;
			
		case MENU_RELOAD:
			OfflineStationProvider osp = (OfflineStationProvider) ProviderFactory.getStationProvider();
			new StationLoader(osp, false).execute( (Void)null);			
			break;
			
		default:
			retval = super.onOptionsItemSelected(item);
		}
		
		return retval;
	}
	

	class AboutListener implements OnClickListener {

		@Override
		public void onClick(View v) {
			/*
			String appName = WelcomeScreen.this.getResources().getString(R.string.app_name);
			String ver = WelcomeScreen.this.getResources().getString(R.string.app_version);			
			
			StringBuffer message = new StringBuffer();
			message.append(appName);
			message.append(" v").append(ver).append("\n");
			message.append("By Torben H. Nielsen\n"); 

			MessageBox.showMessage(WelcomeScreen.this, message.toString());*/
			/*Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://t-hoerup.dk/android/traininfo/")); 
			startActivity(browserIntent);*/
			
			Intent intent = new Intent(WelcomeScreen.this, AboutScreen.class);
			WelcomeScreen.this.startActivity(intent);
		}

	}
	

	class StationListListener implements OnClickListener{
		ListType launchType;
		StationListListener(ListType type) {
			launchType = type;
		}
		
		@Override
		public void onClick(View v) {
			
			StationProvider sp = ProviderFactory.getStationProvider();
			
			if (sp instanceof OfflineStationProvider ) {
				OfflineStationProvider osp = (OfflineStationProvider) sp;
				
				if (! osp.hasStations()) {
					stationLoader = new StationLoader(osp, false);
					stationLoader.execute( (Void)null);	
					return;
				}
			}
			
			Intent intent = new Intent(WelcomeScreen.this, StationList.class);
			intent.putExtra("type", launchType);
			WelcomeScreen.this.startActivity(intent);
		}
		
	}
	
	class StationLoader extends AsyncTask<Void,Void,Void> {


		boolean succeeded;
		ProgressDialog dlg;
		OfflineStationProvider osp;
		String exMsg;
		boolean silent;
		
		public StationLoader(OfflineStationProvider osp, boolean silent) {
			this.osp = osp;
			this.silent = silent;
		}
		
		@Override
		protected Void doInBackground(Void... params) {
			try {
				osp.downloadStations( WelcomeScreen.this );
				succeeded = true;
			} catch (Exception e) {
				succeeded = false;
				exMsg = e.getMessage();
				Log.e("TrainInfo", "download error", e);				
			}
			return null;
		}

		
		@Override
		protected void onPreExecute() {
			super.onPreExecute();
			Log.i("TrainInfo", "StationLoader.onPreExecute() ");
			
			if (silent == false) {
				dlg = new ProgressDialog(WelcomeScreen.this);
				dlg.setMessage( getText(R.string.welcome_downloadingstations) );
				dlg.setCancelable(false);
				dlg.show();
			} 
		}

		@Override
		protected void onPostExecute(Void result) {
			super.onPostExecute(result);
			Log.i("TrainInfo", "StationLoader.onPostExecute() ");
			
			if (silent == false) {
				dlg.dismiss();
				dlg = null;
			}
			
			if (succeeded) {
				Editor edit = prefs.edit();
				edit.putLong(stationsreload, System.currentTimeMillis() );
				edit.commit();
			} else {
				if (silent == false) {
					Toast.makeText(WelcomeScreen.this, "Error " + exMsg, Toast.LENGTH_LONG).show();
				}
			}
		}	
	}
	
}