package com.grundfos.android.people;

import java.util.Date;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.ConnectivityManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.PowerManager;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;

public class PeopleList extends ListActivity {


	public static final int DOWNLOAD = 1010;
	public static final int ABOUT = 1011;

	public static final int DOWNLOAD_SUCCESS = 0;
	public static final int DOWNLOAD_FAILED = 1;

	public static final String PREF_LAST_DB_UPDATE = "LastDbUpdate";
	public static final String PREFS = "PeoplePrefs";

	PeopleDatabase peopleDB;

	ProgressDialog dialog;
	SimpleCursorAdapter adapter; 

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);


		peopleDB = new PeopleDatabase(this);


		adapter = new SimpleCursorAdapter(this,
				R.layout.row, // Use a template
				// that displays a
				// text view
				null , // Give the cursor to the list adatper
				new String[] { "name", "inits", "company" }, // Map the NAME column in the
				// people database to...
				new int[] {R.id.name, R.id.init, R.id.company}); // The "text1" view defined in
		// the XML template

		setListAdapter( adapter ) ;

		EditText et = (EditText) findViewById( R.id.entry);
		et.setOnEditorActionListener( new OnEditorActionListener() {
			public boolean  onEditorAction  (TextView v, int actionId, KeyEvent event) {
				Log.e("Atest", "asd: " + event );
				return true;
			}

		});
		et.addTextChangedListener( new TextWatcher() {
			public void afterTextChanged(Editable s) {
				searchStringChanged(s.toString());
			}
			public void onTextChanged(CharSequence s, int start, int before, int count){
			}
			public void beforeTextChanged(CharSequence s, int start, int count, int after){
			}
		});

		if ( peopleDB.getPeopleCount() == 0)
			onEmptyDB();

		Log.i("PeopleList", "Activity started");        
	}




	@Override
	protected void finalize() throws Throwable {
		peopleDB.close();
		super.finalize();
	}



	public void onEmptyDB()
	{
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setMessage("Database is empty, download data now?")
		.setCancelable(false)
		.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
			public void onClick(DialogInterface dialog, int id) {
				dialog.dismiss();
				loadDatabase();
			}
		})
		.setNegativeButton("No", new DialogInterface.OnClickListener() {
			public void onClick(DialogInterface dialog, int id) {
				dialog.cancel();
			}
		})
		.show();    
	}

	public void searchStringChanged(String search)
	{
		Cursor names = null;
		if (search.trim().length() >= 2)
			names = peopleDB.getPeopleList(search);

		adapter.changeCursor(names);
		adapter.notifyDataSetChanged();
	}

	protected void  onListItemClick  (ListView l, View v, int position, long id)
	{
		Intent intent = new Intent(this, PeopleDetails.class);
		intent.putExtra("id", id);
		startActivity(intent);
	}


	@Override
	public boolean onOptionsItemSelected(MenuItem item) {

		switch (item.getItemId()) {
		case DOWNLOAD:
			loadDatabase();
			return true;
		case ABOUT:
			showAbout();
			return true;
		}

		return super.onOptionsItemSelected(item);
	}


	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		menu.add(0, DOWNLOAD, 0, "Download DB");
		menu.add(0, ABOUT, 0, "About");
		return true;
	}


	public void showAbout() {
		SharedPreferences settings = getSharedPreferences(PREFS, 0);
		StringBuffer message = new StringBuffer();
		message.append("Grundfos People v0.1\n");
		message.append("By Torben Hørup Nielsen\n");
		message.append("Database size: ").append(peopleDB.getPeopleCount()).append("\n");
		message.append("Last DB update: ").append( settings.getString(PREF_LAST_DB_UPDATE, " - never -"));

		showMessage(message.toString());

	}

	public void showMessage(String message) {
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setMessage(message)
		.setCancelable(false)
		.setPositiveButton("OK", new DialogInterface.OnClickListener() {
			public void onClick(DialogInterface dialog, int id) {
				dialog.dismiss();
			}
		})
		.show();

	}

	public void loadDatabase()
	{
		ConnectivityManager cm = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE);
		if (cm.getActiveNetworkInfo().getType() != ConnectivityManager.TYPE_WIFI) {
			AlertDialog.Builder builder = new AlertDialog.Builder(this);
			builder.setMessage("You are not connected to a WiFi network. It is not recommended to load a DB via mobile network")
			.setCancelable(false)
			.setPositiveButton("Continue", new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog, int id) {
					dialog.dismiss();
					startLoadDatabase();
				}
			})
			.setNegativeButton("Abort", new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog, int id) {
					dialog.cancel();
				}
			})
			.show();    
		} else {
			startLoadDatabase();
		}
	}


	public void startLoadDatabase()
	{
		dialog = new ProgressDialog(this);
		dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
		dialog.setMessage("Loading...");
		dialog.setCancelable(false);
		dialog.show();

		Thread t = new Thread(reloadDB);
		t.start();
	}

	private Handler progressHandler = new Handler() {
		public void handleMessage(Message msg) {
			if (msg.what == 0)
				dialog.setMax( msg.arg1 );
			else
				dialog.setProgress(msg.arg1);
		}
	};

	private Handler dbUpdateHandler = new Handler() {

		@Override
		public void handleMessage(Message msg) {
			dialog.dismiss();
			if (msg.what == DOWNLOAD_SUCCESS) { 
				Date d = new Date();

				SharedPreferences settings = getSharedPreferences(PREFS, 0);

				SharedPreferences.Editor ed = settings.edit();            	
				ed.putString(PREF_LAST_DB_UPDATE, d.toLocaleString());
				ed.commit();
			} else {
				showMessage("Download failed");

			}
		}
	};

	Runnable reloadDB = new Runnable() {
		public void run() {
			PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
			PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.SCREEN_DIM_WAKE_LOCK, "My Tag");
			try
			{
				wl.acquire();

				peopleDB.loadData(progressHandler);
				dbUpdateHandler.sendEmptyMessage(DOWNLOAD_SUCCESS);
			} catch (Exception e) {
				Log.e("PeopleList", "reloadDB", e);
				dbUpdateHandler.sendEmptyMessage(DOWNLOAD_FAILED);
			} finally {
				wl.release();
			}
		}
	};
}