package dk.thoerup.traininfo;

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.view.View;
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;
	int stationId;
	
	double latitude,longitude;
	
	@SuppressWarnings("unchecked")
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.departurelist);
		
		adapter = new DepartureListAdapter(this);
		setListAdapter(adapter);
		
		Intent launchedBy = getIntent();
		
		latitude = launchedBy.getDoubleExtra("latitude", 0.0);
		longitude = launchedBy.getDoubleExtra("longitude", 0.0);
		
		String name = launchedBy.getStringExtra("name");
		((TextView) findViewById(R.id.stationName)).setText( name );

		String address = launchedBy.getStringExtra("address");
		((TextView) findViewById(R.id.stationAddr)).setText( address );
		
		stationId = launchedBy.getIntExtra("stationid", -1); 
		
		findViewById(R.id.header).setOnClickListener( mapLauncher );
		
		NumberFormat format = NumberFormat.getNumberInstance();
		format.setMaximumFractionDigits(1);
		format.setMinimumFractionDigits(1);
		int distance = launchedBy.getIntExtra("distance", 0);
		((TextView) findViewById(R.id.stationDistance)).setText( format.format((double)distance/1000.0) + " km." );
	
		
		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;
			break;
		}
	}
	
	@Override
	protected Dialog onCreateDialog(int id) {
		switch (id) {
		case DLG_PROGRESS:
			ProgressDialog dlg = new ProgressDialog(this);
			dlg.setMessage("Fetch departure data");
			dlg.setCancelable(true);
			return dlg;			
		default:
			return super.onCreateDialog(id);		
		}
	}

	void startDepartureFetcher() {
		showDialog(DLG_PROGRESS);
		fetcher = new DepartureFetcher(); 
		fetcher.execute(stationId);
	}
	
	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:" + latitude + "," + longitude);
			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) {
				adapter.setDepartures(departures);
				if (departures.size() == 0) {
					MessageBox.showMessage(DepartureList.this, "No departures found");
				}
			} else { // communication or parse error
				AlertDialog.Builder builder = new AlertDialog.Builder(DepartureList.this);						
				builder.setMessage("Error finding departures");
				builder.setCancelable(true);
				builder.setPositiveButton("Retry", new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog, int id) {
						dialog.dismiss();
						startDepartureFetcher();
						
					}
				});
				builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog, int id) {
						dialog.dismiss();
					}							
				});												
				builder.show();				
			}
		}

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