package com.example.junsang.simsimi;

import android.os.AsyncTask;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

import org.json.JSONArray;
import org.json.JSONException;
//import org.w3c.dom.Document;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Iterator;


public class MainActivity extends ActionBarActivity {

    private static final String URL = "http://aqicn.org/city/seoul";
    String results;
    TextView pm_tv;

    //
    public String parse_pm(String str){
        String parse_1 = str.split("<td id=\'cur_pm25\' class=\'tdcur\' style=\'font-weight:bold;font-size:11px;\' align=center>")[1];
        String parse_2 = parse_1.split("</td>")[0];

        return parse_2;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        pm_tv = (TextView) findViewById(R.id.pm_tv);

        new DownloadPageTask().execute(URL);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    private class DownloadPageTask extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... urls) {
            try {
                return getHtmlFromHttp(urls[0]);
            } catch (IOException e) {
                return "Unable to retrieve web page.";
            }
        }

        @Override
        protected void onPostExecute(String result) {
            results = result;

            // 지금 result : html
            // parsing -> JsonArray
            String jsonStr = "hi";
            try {
                JSONArray a = new JSONArray(jsonStr);
            } catch (JSONException e) {
                e.printStackTrace();
            }

            jsonStr = parse_pm(result);
            /*
            Document doc = Jsoup.parse(result);
            Elements rows = doc.select("td.line-content ");


            for (Element row : rows) {
                Iterator<Element> iterElem = row.getElementsByTag("div").iterator();
                StringBuilder builder = new StringBuilder();
                System.out.println(builder);
                builder.append(iterElem.next());
                jsonStr= jsonStr+builder.toString();
            }*/
         //   String testStr = (?:"<td id='cur_pm25' class='tdcur' style='font-weight:bold;font-size:11px;' align=center>") result;

            pm_tv.setText("지금 서울의 초미세먼지 농도는 "+jsonStr+"㎍/㎥야~");
        }
    }

    private String getHtmlFromHttp(String myUrl) throws IOException {
        InputStream is = null;
        String str = "";

        try {
            URL url = new URL(myUrl);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setReadTimeout(10000);
            conn.setConnectTimeout(10000);
            conn.setRequestMethod("GET");
            conn.setDoInput(true);

            conn.connect();
            int resCode = conn.getResponseCode();

            if (resCode == HttpURLConnection.HTTP_OK) {
                StringBuffer sb = new StringBuffer();

                is = conn.getInputStream();
                BufferedReader br = new BufferedReader(new InputStreamReader(is));
                String line;
                while ((line = br.readLine()) != null) {
                    sb.append(line);
                }
                str = sb.toString();


            } else {
                conn.disconnect();
            }
        } finally {
            if (is != null) {
                is.close();
            }
        }

        return str;
    }
}