package info.androidhive.imageslider;

import info.androidhive.imageslider.adapter.GridViewImageAdapter;
import info.androidhive.imageslider.helper.AppConstant;
import info.androidhive.imageslider.helper.JSONfunctions;
import info.androidhive.imageslider.helper.Util;

import java.util.ArrayList;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.res.Resources;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.TypedValue;
import android.widget.GridView;

public class GridViewActivity extends Activity {

	private Util utils;
	public static ArrayList<String> imagePaths = new ArrayList<String>();
	private GridViewImageAdapter adapter;
	private GridView gridView;
	private int columnWidth;
	String location = "http://snapoodle.com/APIS/android/feed.php";
	private DbAdapter dbHelper;
	private info.androidhive.imageslider.ConnectionDetector cd;
	static final String TAG_ITEMS = "print";
	private ArrayList<String> arrayList = new ArrayList<String>();
	private AlertDialogManager alert = new AlertDialogManager();
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_grid_view);

		gridView = (GridView) findViewById(R.id.grid_view);
		dbHelper = new DbAdapter(this);
		cd = new ConnectionDetector(this);
		utils = new Util(this);

		// Initilizing Grid View
		InitilizeGridLayout();

		// loading all image paths from SD card
		//imagePaths = utils.getFilePaths();

		// Gridview adapter
		if (!cd.isConnectingToInternet()) {
			alert.showAlertDialog(GridViewActivity.this, "Internet not available","Please connect to working Internet connection", false);
			dbHelper.open();
			arrayList = dbHelper.fetchAll();
			dbHelper.close();
			adapter = new GridViewImageAdapter(GridViewActivity.this, arrayList,columnWidth);
			gridView.setAdapter(adapter);
			return;
		} else {
		new getImages().execute();
		}
	}

	private void InitilizeGridLayout() {
		Resources r = getResources();
		float padding = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
				AppConstant.GRID_PADDING, r.getDisplayMetrics());

		columnWidth = (int) ((utils.getScreenWidth() - ((AppConstant.NUM_OF_COLUMNS + 1) * padding)) / AppConstant.NUM_OF_COLUMNS);

		gridView.setNumColumns(AppConstant.NUM_OF_COLUMNS);
		gridView.setColumnWidth(columnWidth);
		gridView.setStretchMode(GridView.NO_STRETCH);
		gridView.setPadding((int) padding, (int) padding, (int) padding,
				(int) padding);
		gridView.setHorizontalSpacing((int) padding);
		gridView.setVerticalSpacing((int) padding);
	}
	class getImages extends AsyncTask<String, Void, String> {

		@Override
		protected String doInBackground(String... params) {
			// TODO Auto-generated method stub
			JSONObject json = JSONfunctions.getJSONfromURL(location);

			try {
				JSONArray jarray;
				jarray = json.getJSONArray(TAG_ITEMS);
				dbHelper.open();
				for (int i = 0; i < jarray.length(); i++) {
					JSONObject gridImages = jarray.getJSONObject(i);
					imagePaths.add(gridImages.getString("saved_location"));
					dbHelper.addPath(gridImages.getString("saved_location"));
				}
				dbHelper.close();
			} catch (JSONException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

			return null;
		}

		@Override
		protected void onPostExecute(String result) {
			// TODO Auto-generated method stub
			super.onPostExecute(result);
			adapter = new GridViewImageAdapter(GridViewActivity.this, imagePaths,
					columnWidth);

			// setting grid view adapter
			gridView.setAdapter(adapter);
		}
	}
}