package dk.thoerup.traininfo;

import static dk.thoerup.traininfo.R.string.departurelist_fetchdepartures;
import static dk.thoerup.traininfo.R.string.departurelist_fetcharrivals;
import static dk.thoerup.traininfo.R.string.generic_cancel;
import static dk.thoerup.traininfo.R.string.generic_retry;


import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.List;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import dk.thoerup.traininfo.provider.DepartureProvider;
import dk.thoerup.traininfo.provider.ProviderFactory;
import dk.thoerup.traininfo.util.MessageBox;

public class DepartureList extends ListActivity {

	public static final int DLG_PROGRESS = 1;
	
	
	DepartureListAdapter adapter;
	DepartureProvider provider;
	List<DepartureBean> departures;
	
	int selectedItemId;
	//DepartureBean currentDeparture;
	
	ProgressDialog pgDialog;
	
	DepartureFetcher fetcher;

	StationBean station;
	
	boolean arrival = false;
	
	@SuppressWarnings("unchecked")
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.departurelist);
		
		adapter = new DepartureListAdapter(this);
		setListAdapter(adapter);
		
		Intent launchedBy = getIntent();
	
		station = (StationBean) launchedBy.getSerializableExtra("stationbean");
		
		((TextView) findViewById(R.id.stationName)).setText( station.getName() );


		((TextView) findViewById(R.id.stationAddr)).setText( station.getAddress() );
		
		final Button departureBtn = (Button) findViewById(R.id.departurebtn);
		final Button arrivalBtn = (Button) findViewById(R.id.arrivalbtn);
		
		departureBtn.setOnClickListener( new OnClickListener() {
			@Override
			public void onClick(View arg0) {	
				arrivalBtn.setBackgroundResource(R.drawable.custom_button);
				departureBtn.setBackgroundResource(R.drawable.custom_button_hilight);
				arrival = false;
				startDepartureFetcher();
			}
		});
		arrivalBtn.setOnClickListener( new OnClickListener() {
			@Override
			public void onClick(View arg0) {	
				arrivalBtn.setBackgroundResource(R.drawable.custom_button_hilight);
				departureBtn.setBackgroundResource(R.drawable.custom_button);
				arrival = true;			
				startDepartureFetcher();
			}
		});
		
		
		
		
		findViewById(R.id.header).setOnClickListener( mapLauncher );
		
		int distance = station.getDistance();
		if (distance != 0) {
			NumberFormat format = NumberFormat.getNumberInstance();
			format.setMaximumFractionDigits(1);
			format.setMinimumFractionDigits(1);
		
			((TextView) findViewById(R.id.stationDistance)).setText( format.format((double)distance/1000.0) + " km." );
		} else {
			((TextView) findViewById(R.id.stationDistance)).setVisibility(View.GONE);
		}
		
	
		if (station.isRegional() == false && station.isSTrain() == false) {
			getListView().setVisibility( View.GONE );		
			findViewById(R.id.metroonly).setVisibility( View.VISIBLE );
			departureBtn.setVisibility( View.GONE );
			arrivalBtn.setVisibility(View.GONE);
			
		} else {
			provider = ProviderFactory.getDepartureProvider();
			
			if (savedInstanceState == null) {
				startDepartureFetcher();
			} else {
				departures = (List<DepartureBean>) savedInstanceState.getSerializable("departures");
				adapter.setDepartures(departures);
				selectedItemId = savedInstanceState.getInt("selectedItemId");	
			}
		}
	}
	
    @Override 
    public void onSaveInstanceState(Bundle outState) 
    {
    	if (pgDialog != null && pgDialog.isShowing())
    		dismissDialog(DLG_PROGRESS);

    	outState.putInt("selectedItemId", selectedItemId);
    	
    	outState.putSerializable("departures", (ArrayList<DepartureBean>) departures);
    }
	
	@Override
	protected void onListItemClick(ListView l, View v, int position, long id) {
		super.onListItemClick(l, v, position, id);
		
		selectedItemId = position;
		
		DepartureBean dep = departures.get(selectedItemId);
	
		Intent intent = new Intent(this, TimetableList.class);
		intent.putExtra("departure", dep);
		
		startActivity(intent);
				
	}
	

	@Override
	protected void onPrepareDialog(int id, Dialog dialog) {
		super.onPrepareDialog(id, dialog);
		
		switch (id) {
		case DLG_PROGRESS:
			pgDialog = (ProgressDialog) dialog;
			int messageId = arrival == false ? departurelist_fetchdepartures : departurelist_fetcharrivals;
			pgDialog.setMessage( getString(messageId) );
			break;
		}
	}
	
	@Override
	protected Dialog onCreateDialog(int id) {
		switch (id) {
		case DLG_PROGRESS:

			ProgressDialog dlg = new ProgressDialog(this);
			dlg.setCancelable(true);
			return dlg;			
		default:
			return super.onCreateDialog(id);		
		}
	}

	void startDepartureFetcher() {
		showDialog(DLG_PROGRESS);
		fetcher = new DepartureFetcher(); 
		fetcher.execute(station.getId());
	}
	
	class DialogDismisser implements View.OnClickListener {

		Dialog dlg;
		public DialogDismisser(Dialog d) {
			dlg = d;
		}
		
		@Override
		public void onClick(View v) {
			if (dlg.isShowing())
				dlg.dismiss();
		}	
	}
	
	View.OnClickListener mapLauncher = new View.OnClickListener() {
		@Override
		public void onClick(View v) {			
			Uri uri = Uri.parse("geo:" + station.getLatitude() + "," + station.getLongitude());
			startActivity( new Intent(Intent.ACTION_VIEW, uri));
		}
	};


	
	class DepartureFetcher extends AsyncTask<Integer, Void, Void> {

		boolean success;

		@Override
		protected void onPostExecute(Void result) {
			super.onPostExecute(result);
			
			
			pgDialog.dismiss();
			
			if (success) {
				DepartureList.this.getListView().setVisibility(View.GONE); //Experimental, inspired by http://osdir.com/ml/Android-Developers/2010-04/msg01198.html
				adapter.setDepartures(departures);
				DepartureList.this.getListView().setVisibility(View.VISIBLE);
				
				if (departures.size() == 0) {
					MessageBox.showMessage(DepartureList.this, "No departures found", true);
				}
			} else { // communication or parse error
				AlertDialog.Builder builder = new AlertDialog.Builder(DepartureList.this);						
				builder.setMessage("Error finding departures");
				builder.setCancelable(true);
				builder.setPositiveButton(getString(generic_retry), new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog, int id) {
						dialog.dismiss();
						startDepartureFetcher();
						
					}
				});
				builder.setNegativeButton(getString(generic_cancel), new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog, int id) {
						dialog.dismiss();
						DepartureList.this.finish();
					}							
				});
				
				try {
					builder.show();
				} catch (android.view.WindowManager.BadTokenException e) {					
					Log.i("DepartureList", "BadTokenException"); // this can happen if the user switched away from this activity, while doInBackground was running
				}				
			}
		}

		@Override
		protected Void doInBackground(Integer... params) {
			success = provider.lookupDepartures(params[0], DepartureList.this.arrival);
			departures = provider.getDepartures(params[0], DepartureList.this.arrival);
			return null;
		}
		
	}
}