/*
 * Southampton University Map App
 * Copyright (C) 2011  Christopher Baines
 * 
 * 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; either version 2
 * of the License, or (at your option) any later version.
 * 
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package net.cbaines.suma;

import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.apache.http.client.ClientProtocolException;
import org.json.JSONException;

import android.app.Dialog;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnLongClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.j256.ormlite.dao.Dao;
import com.j256.ormlite.stmt.PreparedQuery;
import com.j256.ormlite.stmt.QueryBuilder;

public class BusStopActivity extends ToastHelperActivity implements OnCheckedChangeListener, Preferences,
		OnItemClickListener, OnLongClickListener {

	final static String TAG = "BusTimeActivity";

	private ListView busTimeList;
	private TextView busName;
	private TextView busID;
	private CheckBox busFavourite;
	private TextView busStopMessage;
	private ProgressBar progBar;
	private LinearLayout busTimeContentLayout;

	protected Timetable timetable;
	private Timetable visibleTimetable;

	private BusStop busStop;

	private GetTimetableTask timetableTask;

	private Context instance;

	private Handler mHandler;
	private Runnable refreshData;

	private CheckBox U1RouteRadioButton;
	private CheckBox U1NRouteRadioButton;
	private CheckBox U2RouteRadioButton;
	private CheckBox U6RouteRadioButton;
	private CheckBox U9RouteRadioButton;

	private static final int POI_DIALOG_ID = 0;
	private POIDialog busStopDialog;

	private HashSet<BusRoute> routes = new HashSet<BusRoute>();

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.bus_stop_activity);

		Log.i(TAG, "getIntent().getDataString() " + getIntent().getDataString());

		String busStopID;

		if (getIntent().getDataString().startsWith("http://data")) {

			String[] uriParts = getIntent().getDataString().split("/");

			busStopID = uriParts[uriParts.length - 1].replace(".html", "");

		} else {

			String[] uriParts = getIntent().getDataString().split("/");

			busStopID = uriParts[uriParts.length - 1];
		}

		final DatabaseHelper helper = getHelper();

		SharedPreferences favouritesPreferences = getSharedPreferences(FAVOURITES_PREFERENCES, 0);
		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);

		instance = this;

		U1RouteRadioButton = (CheckBox) findViewById(R.id.radio_u1);
		U1NRouteRadioButton = (CheckBox) findViewById(R.id.radio_u1n);
		U2RouteRadioButton = (CheckBox) findViewById(R.id.radio_u2);
		U6RouteRadioButton = (CheckBox) findViewById(R.id.radio_u6);
		U9RouteRadioButton = (CheckBox) findViewById(R.id.radio_u9);

		U1RouteRadioButton.setOnCheckedChangeListener(this);
		U1RouteRadioButton.setOnLongClickListener(this);

		U1NRouteRadioButton.setOnCheckedChangeListener(this);
		U1NRouteRadioButton.setOnLongClickListener(this);

		U2RouteRadioButton.setOnCheckedChangeListener(this);
		U2RouteRadioButton.setOnLongClickListener(this);

		U6RouteRadioButton.setOnCheckedChangeListener(this);
		U6RouteRadioButton.setOnLongClickListener(this);

		U9RouteRadioButton.setOnCheckedChangeListener(this);
		U9RouteRadioButton.setOnLongClickListener(this);

		try {
			Dao<BusStop, String> busStopDao = helper.getBusStopDao();

			busStop = busStopDao.queryForId(busStopID);

			Dao<BusRoute, Integer> busRouteDao = helper.getBusRouteDao();
			Dao<RouteStop, Integer> routeStopsDao = helper.getRouteStopsDao();

			for (BusRoute route : busRouteDao) {
				QueryBuilder<RouteStop, Integer> queryBuilder = routeStopsDao.queryBuilder();

				queryBuilder.where().eq(RouteStop.ROUTE_ID_FIELD_NAME, route.id).and()
						.eq(RouteStop.STOP_ID_FIELD_NAME, busStopID);
				queryBuilder.setCountOf(true);
				PreparedQuery<RouteStop> preparedQuery = queryBuilder.prepare();

				long count = routeStopsDao.countOf(preparedQuery);

				if (route.code.equals("U1")) {
					if (count != 0) {
						U1RouteRadioButton.setVisibility(View.VISIBLE);
						routes.add(route);
					} else {
						U1RouteRadioButton.setVisibility(View.GONE);
					}
				} else if (route.code.equals("U1N")) {
					if (count != 0) {
						U1NRouteRadioButton.setVisibility(View.VISIBLE);
						routes.add(route);
					} else {
						U1NRouteRadioButton.setVisibility(View.GONE);
					}
				} else if (route.code.equals("U2")) {
					if (count != 0) {
						U2RouteRadioButton.setVisibility(View.VISIBLE);
						routes.add(route);
					} else {
						U2RouteRadioButton.setVisibility(View.GONE);
					}
				} else if (route.code.equals("U6")) {
					if (count != 0) {
						U6RouteRadioButton.setVisibility(View.VISIBLE);
						routes.add(route);
					} else {
						U6RouteRadioButton.setVisibility(View.GONE);
					}
				} else if (route.code.equals("U9")) {
					if (count != 0) {
						U9RouteRadioButton.setVisibility(View.VISIBLE);
						routes.add(route);
					} else {
						U9RouteRadioButton.setVisibility(View.GONE);
					}
				}
			}

			busFavourite = (CheckBox) findViewById(R.id.favouriteCheckBox);
			busFavourite.setChecked(favouritesPreferences.getBoolean(busStop.id, false));
			busFavourite.setOnCheckedChangeListener(this);

		} catch (SQLException e) {
			e.printStackTrace();
		}

		busName = (TextView) findViewById(R.id.busStopName);

		busID = (TextView) findViewById(R.id.busStopID);
		if (prefs.getBoolean(SHOW_IDENTIFIERS, SHOW_IDENTIFIERS_ENABLED_BY_DEFAULT)) {
			busID.setText(busStopID);
			busID.setVisibility(View.VISIBLE);
		} else {
			busID.setVisibility(View.GONE);
		}

		busStopMessage = (TextView) findViewById(R.id.busStopMessage);
		busStopMessage.setVisibility(View.GONE);
		progBar = (ProgressBar) findViewById(R.id.busStopLoadBar);
		progBar.setVisibility(View.GONE);
		busTimeList = (ListView) findViewById(R.id.busStopTimes);
		busTimeContentLayout = (LinearLayout) findViewById(R.id.busTimeContentLayout);

		Log.i(TAG, "Got busstop id " + busStopID);

		busName.setText(busStop.description);
	}

	public void onResume() {
		super.onResume();

		SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this);
		if (sharedPrefs.getBoolean(UNI_LINK_BUS_TIMES, UNI_LINK_BUS_TIMES_ENABLED_BY_DEFAULT)
				|| sharedPrefs.getBoolean(NON_UNI_LINK_BUS_TIMES, NON_UNI_LINK_BUS_TIMES_ENABLED_BY_DEFAULT)) {
			Log.i(TAG, "Live Times enabled");
			timetable = (Timetable) getLastNonConfigurationInstance();

			refreshData = new Runnable() {
				public void run() {
					timetableTask = new GetTimetableTask();
					timetableTask.execute(busStop.id);
					mHandler.postDelayed(refreshData, 20000);
				}
			};

			mHandler = new Handler();

			if (timetable == null) {
				Log.i(TAG, "No Previous timetable");
				mHandler.post(refreshData);
			} else {
				Log.i(TAG, "Displaying previous timetable");
				displayTimetable(timetable);
				if (System.currentTimeMillis() - timetable.fetchTime.getTime() > 20000) {
					mHandler.post(refreshData);
				}
			}

		} else {
			Log.i(TAG, "Live Times Disabled");
			progBar.setVisibility(View.GONE);
			busStopMessage.setText("Live bus times disabled");
			busStopMessage.setVisibility(View.VISIBLE);
		}

	}

	public void onPause() {
		if (mHandler != null) { // BusTimes are enabled
			mHandler.removeCallbacks(refreshData);
			if (timetableTask != null) // Could happen if the handler has not
										// created the timetableTask yet
				timetableTask.cancel(true);
			Log.i(TAG, "Stoping refreshing timetable data");
		}

		super.onPause();
	}

	public void finish() {
		setResult(RESULT_OK, getIntent());
		super.finish();
	}

	public void onCheckedChanged(CompoundButton button, boolean checked) {
		if (button.equals(busFavourite)) {
			SharedPreferences favouritesPreferences = getSharedPreferences(FAVOURITES_PREFERENCES, 0);

			if (checked) {
				favouritesPreferences.edit().putBoolean(busStop.id, true).commit();
			} else {
				favouritesPreferences.edit().remove(busStop.id).commit();
			}
		} else {
			Log.i(TAG, "Route radio button made " + checked);
			if (timetable != null) { // If there is a timetable to display
				displayTimetable(timetable);
			}
		}
	}

	@Override
	public Object onRetainNonConfigurationInstance() {
		return timetable;
	}

	private class GetTimetableTask extends AsyncTask<String, Integer, Timetable> {		
		String errorMessage;

		protected void onPreExecute() {
			progBar.setVisibility(View.VISIBLE);
		}

		protected Timetable doInBackground(String... activity) {
			Timetable newTimetable = null;
			try {
				final SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(instance);

				newTimetable = DataManager.getTimetable(instance, busStop.id, sharedPrefs.getBoolean(
						MapActivity.UNI_LINK_BUS_TIMES, MapActivity.UNI_LINK_BUS_TIMES_ENABLED_BY_DEFAULT), sharedPrefs
						.getBoolean(MapActivity.NON_UNI_LINK_BUS_TIMES,
								MapActivity.NON_UNI_LINK_BUS_TIMES_ENABLED_BY_DEFAULT));
			} catch (SQLException e) {
				errorMessage = "Error message regarding SQL?";
				e.printStackTrace();
			} catch (ClientProtocolException e) {
				errorMessage = "ClientProtocolException!?!";
				e.printStackTrace();
			} catch (IOException e) {
				errorMessage = "Error fetching bus times from server, are you connected to the internet?";
				e.printStackTrace();
			} catch (JSONException e) {
				errorMessage = "Error parsing bus times";
				e.printStackTrace();
			} catch (Exception e) {
				Log.e(TAG, "Exception in new timetable " + e.getMessage(), e.getCause());
				e.printStackTrace();
			}

			return newTimetable;
		}

		protected void onPostExecute(Timetable newTimetable) {
			Log.i(TAG, "Got timetable for " + busStop.id);
			if (newTimetable == null) {
				Log.i(TAG, "Its null");

				progBar.setVisibility(View.GONE);
				busStopMessage.setText(errorMessage);
				busStopMessage.setVisibility(View.VISIBLE);
			} else {
				progBar.setVisibility(View.GONE);
				busStopMessage.setVisibility(View.GONE);
				timetable = newTimetable;
				displayTimetable(timetable);
			}
		}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		MenuInflater inflater = getMenuInflater();
		inflater.inflate(R.menu.bus_stop_menu, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle item selection
		if (item.getItemId() == R.id.menu_previous_stop || item.getItemId() == R.id.menu_next_stop) {
			Log.v(TAG, "Got a request for the stop movement");

			Log.v(TAG, routes.size() + " routes avalible from this stop");

			ArrayList<POI> busStops = new ArrayList<POI>();

			for (BusRoute route : routes) {
				try {
					Set<BusStop> tmpStops;
					if (item.getItemId() == R.id.menu_next_stop) {
						tmpStops = route.moveInRoute(this, getHelper().getBusStopDao().queryForId(busStop.id), 1);
					} else {
						tmpStops = route.moveInRoute(this, getHelper().getBusStopDao().queryForId(busStop.id), -1);
					}
					for (BusStop busStop : tmpStops) {
						if (!busStops.contains(busStop)) {
							busStops.add(busStop);
						}
					}
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
			Log.i(TAG, "stops " + busStops);

			if (busStops.size() == 1) {

				BusStop nextBusStop = (BusStop) busStops.iterator().next();

				Uri uri = Uri.parse("http://id.southampton.ac.uk/bus-stop/" + nextBusStop.id);

				Log.i(TAG, "Starting a activity for " + uri + " path " + uri.getPath());

				Intent busStopIntent = new Intent(Intent.ACTION_VIEW, uri);
				startActivity(busStopIntent);

			} else {
				showDialog(POI_DIALOG_ID);
				if (busStopDialog == null) {
					Log.e(TAG, "Very wierd, just tried to launch the favourite's dialog, but its null?");
					return false;
				}

				busStopDialog.setMessage("");
				busStopDialog.setItems(busStops);
				busStopDialog.setTitle("Choose Bus Stop");

				Log.i(TAG, "Showing dialog");
			}

		} else if (item.getItemId() == R.id.menu_refresh_stop) {
			if (mHandler != null) { // BusTimes are enabled
				mHandler.removeCallbacks(refreshData);
				timetableTask.cancel(true);
				Log.i(TAG, "Stoping refreshing timetable data");

				mHandler.post(refreshData);
			} else {
				// TODO: Toast here...
			}
		} else {
			Log.e(TAG, "No known menu option selected");
			return super.onOptionsItemSelected(item);
		}
		return true;
	}

	private void displayTimetable(Timetable timetable) {
		visibleTimetable = (Timetable) timetable.clone();

		Log.i(TAG, "It contains " + visibleTimetable.size() + " stops");

		if (timetable.size() == 0) {
			busStopMessage.setText("No Busses");
			busStopMessage.setVisibility(View.VISIBLE);
			busTimeContentLayout.setGravity(Gravity.CENTER);
		} else {

			for (Iterator<Stop> stopIter = visibleTimetable.iterator(); stopIter.hasNext();) {
				Stop stop = stopIter.next();
				Log.i(TAG, "Begin filtering, looking at " + stop + " with route " + stop.bus.route.code);
				if (stop.bus.route.code.equals("U1")) {
					if (!U1RouteRadioButton.isChecked()) {
						stopIter.remove();
					}
				} else if (stop.bus.route.code.equals("U1N")) {
					if (!U1NRouteRadioButton.isChecked()) {
						stopIter.remove();
					}
				} else if (stop.bus.route.code.equals("U2")) {
					if (!U2RouteRadioButton.isChecked()) {
						stopIter.remove();
					}
				} else if (stop.bus.route.code.equals("U6")) {
					if (!U6RouteRadioButton.isChecked()) {
						stopIter.remove();
					}
				} else if (stop.bus.route.code.equals("U9")) {
					if (!U9RouteRadioButton.isChecked()) {
						stopIter.remove();
					}
				}
			}

			if (visibleTimetable.size() == 0) {
				busTimeContentLayout.setGravity(Gravity.CENTER);
				busStopMessage.setText("No Busses (With the current enabled routes)");
				busStopMessage.setVisibility(View.VISIBLE);
				busTimeList.setVisibility(View.GONE);
			} else {
				busTimeList.setVisibility(View.VISIBLE);
				busStopMessage.setVisibility(View.GONE);
				BusStopSpecificTimetableAdapter adapter;
				if ((adapter = (BusStopSpecificTimetableAdapter) busTimeList.getAdapter()) != null) {
					adapter.updateTimetable(visibleTimetable);
				} else {
					adapter = new BusStopSpecificTimetableAdapter(this, visibleTimetable);
					busTimeList.setAdapter(adapter);
				}
				busTimeContentLayout.setGravity(Gravity.TOP);
			}
		}
	}

	@Override
	protected Dialog onCreateDialog(int id) {
		switch (id) {
		case POI_DIALOG_ID:
			busStopDialog = new POIDialog(instance);
			busStopDialog.setOnItemClickListener(this);
			return busStopDialog;
		}
		return null;
	}

	public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
		Log.i(TAG, "OnItemClick pos " + position + " id " + id);

		String busStopID = busStopDialog.adapter.getItemStringId(position);

		Log.i(TAG, "Bus " + busStopID + " selected");

		Uri uri = Uri.parse("http://id.southampton.ac.uk/bus-stop/" + busStopID);

		Log.i(TAG, "Starting a activity for " + uri + " path " + uri.getPath());

		Intent busStopIntent = new Intent(Intent.ACTION_VIEW, uri);
		startActivity(busStopIntent);
	}

	public boolean onLongClick(View v) {
		Uri uri = null;
		if (v.equals(U1RouteRadioButton)) {
			uri = Uri.parse("http://id.southampton.ac.uk/bus-route/326");
		} else if (v.equals(U1NRouteRadioButton)) {
			uri = Uri.parse("http://id.southampton.ac.uk/bus-route/468");
		} else if (v.equals(U2RouteRadioButton)) {
			uri = Uri.parse("http://id.southampton.ac.uk/bus-route/329");
		} else if (v.equals(U6RouteRadioButton)) {
			uri = Uri.parse("http://id.southampton.ac.uk/bus-route/327");
		} else if (v.equals(U9RouteRadioButton)) {
			uri = Uri.parse("http://id.southampton.ac.uk/bus-route/354");
		}
		if (uri != null) {
			Log.i(TAG, "Starting a activity for " + uri + " path " + uri.getPath());

			Intent busStopIntent = new Intent(Intent.ACTION_VIEW, uri);
			startActivity(busStopIntent);
		}
		return false;
	}
}