package com.androidhive.xmlparsing;

import java.util.ArrayList;
import java.util.HashMap;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

public class AndroidXMLParsingActivity extends ListActivity {

	// All static variables
	static final String URL = "http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20weather.forecast%20where%20woeid%20in%28select%20woeid%20from%20geo.places%20where%20text%3D%22Delhi%22%29&diagnostics=true";
	// XML node keys
	static final String KEY_ITEM = "item"; // parent node
	static final String KEY_ID = "title";
	static final String KEY_NAME = "geo:lat";
	static final String KEY_COST = "geo:long";
	static final String KEY_DESC = "yweather:forecast";

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

		ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();

		XMLParser parser = new XMLParser();
		String xml = parser.getXmlFromUrl(URL); // getting XML
		Log.d("xml",xml);
		
		Document doc = parser.getDomElement(xml); // getting DOM element
		Log.d("doc",""+doc);
		Log.d("parser.getDomElement(xml)",""+parser.getDomElement(xml));

		NodeList nl = doc.getElementsByTagName(KEY_ITEM);
		Log.d("parser.getElementValue(doc);",""+parser.getElementValue(doc));
		
		parser.getElementValue(doc);
		// looping through all item nodes <item>
		for (int i = 0; i < nl.getLength(); i++) {
			// creating new HashMap
			HashMap<String, String> map = new HashMap<String, String>();
			Element e = (Element) nl.item(i);
			// adding each child node to HashMap key => value
			map.put(KEY_ID, parser.getValue(e, KEY_ID));
			Log.d("KEY_ID",parser.getValue(e, KEY_ID));
			
			map.put(KEY_NAME, parser.getValue(e, KEY_NAME));
			Log.d("KEY_NAME",parser.getValue(e, KEY_NAME));
			
			map.put(KEY_COST, "Rs." + parser.getValue(e, KEY_COST));
			Log.d("KEY_COST",parser.getValue(e, KEY_COST));
			
			map.put(KEY_DESC, parser.getValue(e, KEY_DESC));
			Log.d("KEY_DESC",parser.getValue(e, KEY_DESC));
			
			Log.d("map",""+map);
			// adding HashList to ArrayList
			menuItems.add(map);
			Log.d("menuItems",""+menuItems);
		}

		// Adding menuItems to ListView
		ListAdapter adapter = new SimpleAdapter(this, menuItems,
				R.layout.list_item,
				new String[] { KEY_NAME, KEY_DESC, KEY_COST }, new int[] {
						R.id.name, R.id.desciption, R.id.cost });

		setListAdapter(adapter);

		// selecting single ListView item
		ListView lv = getListView();

		lv.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				// getting values from selected ListItem
				String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
				String cost = ((TextView) view.findViewById(R.id.cost)).getText().toString();
				String description = ((TextView) view.findViewById(R.id.desciption)).getText().toString();
				
				// Starting new intent
				Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
				in.putExtra(KEY_NAME, name);
				in.putExtra(KEY_COST, cost);
				in.putExtra(KEY_DESC, description);
				startActivity(in);

			}
		});
	}
}