package dk.thoerup.side9;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.AdapterView.OnItemClickListener;
import dk.thoerup.androidutils.CheckUpdates;

public class PictureOverview extends Activity {
	final static int MENU_DATE = 0;
	final static int MENU_CAPTION = 1;
	
	int current_order = MENU_DATE;
	
	ImageAdapter mImages;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.pictureoverview);
		
		mImages = new ImageAdapter(this);

	    GridView gridview = (GridView) findViewById(R.id.gridview);
	    gridview.setAdapter(mImages);

	    gridview.setOnItemClickListener(new OnItemClickListener() {
	        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
	        	
	        	Intent i = new Intent(PictureOverview.this, dk.thoerup.side9.PictureView.class);
	        	i.putExtra("images", mImages.getImages());
	        	i.putExtra("index", position);

	        	startActivity(i);
	        }
	    });
	    
	    gridview.setOnScrollListener( new ThumbScrollListener() );
	    
	    
	    CheckUpdates update = new CheckUpdates();
	    update.checkForUpdates(this, "http://t-hoerup.dk/android/side9/version.txt", "Side 9 Pigen", "http://t-hoerup.dk/android/side9/Side9.apk");
	}
	
	@Override
	public void onDestroy() {
		super.onDestroy();
		mImages.cleanUp();
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		menu.add(0,MENU_DATE,0, "Order by date");		
		menu.add(0,MENU_CAPTION,0, "Order by caption");

		return true;
	}
	
	

	@Override
	public boolean onPrepareOptionsMenu(Menu menu) {
		MenuItem item = menu.findItem(MENU_DATE);
		if (current_order == MENU_DATE) 
			item.setEnabled(false);
		else
			item.setEnabled(true);
		
		item = menu.findItem(MENU_CAPTION);
		if (current_order == MENU_CAPTION) 
			item.setEnabled(false);
		else
			item.setEnabled(true);

		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch( item.getItemId() ) {
		case MENU_DATE:
			mImages.orderByPath();
			current_order = MENU_DATE;
			return true;
		case MENU_CAPTION:
			mImages.orderByCaption();
			current_order = MENU_CAPTION;
			return true;
		default:
			return super.onOptionsItemSelected(item);
		}		
	}

	class ThumbScrollListener implements AbsListView.OnScrollListener {			
		int prevFirstVisibleItem = 0;
		@Override
		public void onScrollStateChanged(AbsListView view, int scrollState) {
			// TODO Auto-generated method stub				
		}
		
		@Override
		public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

			if (firstVisibleItem != prevFirstVisibleItem) {
				prevFirstVisibleItem = firstVisibleItem;
				mImages.preloadImages(firstVisibleItem + visibleItemCount, 9);
			}
		}
	}
	
}