/*
 * 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.sql.SQLException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.osmdroid.util.GeoPoint;

import android.content.Context;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.Uri;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;

import com.j256.ormlite.android.apptools.OrmLiteBaseActivity;
import com.j256.ormlite.dao.Dao;
import com.j256.ormlite.stmt.PreparedQuery;
import com.j256.ormlite.stmt.QueryBuilder;

public class FindActivity extends OrmLiteBaseActivity<DatabaseHelper> implements Runnable, TextWatcher,
		OnItemClickListener, LocationListener, OnItemLongClickListener {

	final static String TAG = "FindActivity";

	private EditText searchBar;
	private ListView listItems;
	private ProgressBar progBar;
	private LinearLayout findContentLayout;

	private String searchTerm = "";

	private Dao<Building, String> buildingDao;
	private Dao<BusStop, String> busStopDao;
	private Dao<Site, String> siteDao;

	private POIArrayAdapter adapter;

	private GeoPoint userLocation;

	private Thread searchThread;

	ArrayList<POI> getNearestPOIs(int distance) {
		Log.i(TAG, "Getting nearest POI's");
		ArrayList<POI> nearestPOIs = new ArrayList<POI>();
		for (Iterator<Building> buildingDaoIter = buildingDao.iterator(); buildingDaoIter.hasNext();) {
			POI poi = buildingDaoIter.next();
			int dist = poi.point.distanceTo(userLocation);
			if (dist < distance) {
				poi.distTo = dist;
				nearestPOIs.add(poi);
			}
		}

		for (Iterator<BusStop> busStopDaoIter = busStopDao.iterator(); busStopDaoIter.hasNext();) {
			POI poi = busStopDaoIter.next();
			int dist = poi.point.distanceTo(userLocation);
			if (dist < distance) {
				poi.distTo = dist;
				nearestPOIs.add(poi);
			}
		}

		Collections.sort(nearestPOIs, new POIDistanceComparator(userLocation, true));

		Log.i(TAG, "Got " + nearestPOIs.size() + " nearest POI's");
		return nearestPOIs;
	}

	// Search thread
	public void run() {
		POIArrayAdapter tempAdaptor;
		GeoPoint thisUserLocation = userLocation;

		Log.i(TAG, "Search thread started");
		String thisSearchTerm = searchTerm;

		ArrayList<POI> foundPOIsArray = null;

		Log.i(TAG, "Search term length " + thisSearchTerm.length() + " userLocation == null "
				+ (thisUserLocation == null));
		if (thisSearchTerm.length() == 0 && thisUserLocation != null) {
			foundPOIsArray = getNearestPOIs(200);

		}

		if (foundPOIsArray != null && foundPOIsArray.size() != 0) {

			tempAdaptor = new POIArrayAdapter(this, foundPOIsArray);
		} else {

			try {

				foundPOIsArray = new ArrayList<POI>();

				if (thisSearchTerm.length() == 0) {
					for (Building building : buildingDao) {
						foundPOIsArray.add(building);
					}

					if (!thisSearchTerm.equals(searchTerm))
						return;

					for (BusStop busStop : busStopDao) {
						foundPOIsArray.add(busStop);
					}

					if (!thisSearchTerm.equals(searchTerm))
						return;

					for (Site site : siteDao) {
						foundPOIsArray.add(site);
					}

				} else {

					QueryBuilder<Building, String> buildingQueryBuilder = buildingDao.queryBuilder();
					buildingQueryBuilder.where().like(Building.ID_FIELD_NAME, "%" + thisSearchTerm + "%").or()
							.like(Building.NAME_FIELD_NAME, "%" + thisSearchTerm + "%");
					PreparedQuery<Building> buildingPreparedQuery = buildingQueryBuilder.prepare();
					List<Building> buildings = buildingDao.query(buildingPreparedQuery);
					for (Building building : buildings) {
						foundPOIsArray.add(building);
					}
					buildings = null;

					if (!thisSearchTerm.equals(searchTerm))
						return;

					if (thisSearchTerm.contains("site")) {
						for (Site site : siteDao) {
							foundPOIsArray.add(site);
						}
					} else {
						QueryBuilder<Site, String> siteQueryBuilder = siteDao.queryBuilder();
						siteQueryBuilder.where().like(Site.ID_FIELD_NAME, "%" + thisSearchTerm + "%").or()
								.like(Site.NAME_FIELD_NAME, "%" + thisSearchTerm + "%");
						PreparedQuery<Site> sitePreparedQuery = siteQueryBuilder.prepare();
						List<Site> sites = siteDao.query(sitePreparedQuery);
						for (Site site : sites) {
							foundPOIsArray.add(site);
						}
						sites = null;
					}

					if (!thisSearchTerm.equals(searchTerm))
						return;

					// if (thisSearchTerm.contains("bus")) {
					// for (BusStop busStop : busStopDao) {
					// foundPOIsArray.add(busStop);
					// }
					// } else {
					QueryBuilder<BusStop, String> busStopQueryBuilder = busStopDao.queryBuilder();
					busStopQueryBuilder.where().like(BusStop.ID_FIELD_NAME, "%" + thisSearchTerm + "%").or()
							.like(BusStop.DESCRIPTION_FIELD_NAME, "%" + thisSearchTerm + "%");
					PreparedQuery<BusStop> busStopPreparedQuery = busStopQueryBuilder.prepare();
					List<BusStop> busStops = busStopDao.query(busStopPreparedQuery);
					for (BusStop busStop : busStops) {
						foundPOIsArray.add(busStop);
					}
					busStops = null;
					// }

					if (!thisSearchTerm.equals(searchTerm))
						return;

					Log.i(TAG, "Found " + foundPOIsArray.size() + " pois");

					if (thisUserLocation != null) {
						Collections.sort(foundPOIsArray, new POIDistanceComparator(userLocation));
					} else {
						Collections.sort(foundPOIsArray, new StringDistanceComparator(thisSearchTerm));
					}

				}

				if (!thisSearchTerm.equals(searchTerm))
					return;

				tempAdaptor = new POIArrayAdapter(this, foundPOIsArray);

			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				return;
			}
		}

		if (thisSearchTerm.equals(searchTerm)) {
			Log.i(TAG, "Search terms still equal, starting post");
			adapter = tempAdaptor;
			listItems.post(new Runnable() {
				public void run() {
					listItems.setAdapter(adapter);
					if (progBar.getVisibility() != View.GONE) {
						progBar.setVisibility(View.GONE);
						findContentLayout.setGravity(Gravity.TOP);
					}
				}
			});
		} else {
			Log.i(TAG, "Search terms no longer equal, exiting");
		}
	}

	/** Called when the activity is first created. */
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.find_activity);

		searchBar = (EditText) findViewById(R.id.searchBar);
		searchBar.addTextChangedListener(this);

		listItems = (ListView) findViewById(R.id.findListItems);
		listItems.setOnItemClickListener(this);
		listItems.setOnItemLongClickListener(this);

		progBar = (ProgressBar) findViewById(R.id.findLoadBar);
		findContentLayout = (LinearLayout) findViewById(R.id.findContentLayout);

		try {
			buildingDao = getHelper().getBuildingDao();
			busStopDao = getHelper().getBusStopDao();
			siteDao = getHelper().getSiteDao();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		// Acquire a reference to the system Location Manager
		LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
		Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
		if (lastKnownLocation != null) {
			userLocation = Util.locationToGeoPoint(lastKnownLocation);
		} else {
			lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
			if (lastKnownLocation != null) {
				userLocation = Util.locationToGeoPoint(lastKnownLocation);

			}
		}
		// Register the listener with the Location Manager to receive location
		// updates
		locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 10000, 10, this);
		try {
			locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 10000, 10, this);
		} catch (Exception e) {
			// Ignore anything that goes wrong here...
		}

		searchThread = new Thread(this);
		searchThread.start();

	}

	public void afterTextChanged(Editable s) {
		searchTerm = s.toString();
		Log.i(TAG, "Text changed " + searchTerm + " starting search thread");
		new Thread(this).start();
	}

	public void beforeTextChanged(CharSequence s, int start, int count, int after) {
	}

	public void onTextChanged(CharSequence s, int start, int before, int count) {
	}

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

		POI poi = adapter.getPOIItem(position);

		Uri uri = Uri.parse("geo:" + Util.E6IntToDouble(poi.point.getLatitudeE6()) + ","
				+ Util.E6IntToDouble(poi.point.getLongitudeE6()) + "?z=18");

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

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

	public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {

		POI poi = adapter.getPOIItem(position);

		Log.i(TAG, "Long Click Event ID: " + poi.id);
		Uri uri = null;

		if (poi.type.equals(POI.BUS_STOP)) {
			Log.i(TAG, "Its a bus stop");

			BusStop busStop = (BusStop) poi;

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

		} else if (poi.type.equals(POI.BUILDING)) {
			Log.i(TAG, "Its a buildings");

			Building building = (Building) poi;

			uri = Uri.parse("http://id.southampton.ac.uk/building/" + building.id);
		} else {
			Log.e(TAG, "Error in onItemLongClick");
			return false;
		}

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

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

		return true;
	}

	public void onLocationChanged(Location location) {
		Log.i(TAG, "Got location update for FindActivity");
		userLocation = Util.locationToGeoPoint(location);
		if (!searchThread.isAlive()) {
			searchThread = new Thread(this);
			searchThread.start();
		}
	}

	public void onProviderDisabled(String arg0) {
	}

	public void onProviderEnabled(String provider) {
	}

	public void onStatusChanged(String provider, int status, Bundle extras) {
	}
}