package Classes.api;

import java.text.ParseException;
import java.util.ArrayList;
import java.util.Date;

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

import Classes.Event;
import Interfaces.Callback;
import model.NewsListModel;
import model.NewsModel;

public class fetchArticles implements Callback{

	private NewsListModel context;
	private String        nextQuery;

	public fetchArticles(NewsListModel context, String nextQuery){

		this.context   = context;
		this.nextQuery = nextQuery;

	}


	@Override
	public void onSuccess(JSONObject response){

		/* (1) Création des NewsModel depuis le json
		---------------------------------------------------------*/
		/* (1) Init. news list */
		ArrayList<NewsModel> newsArr = new ArrayList<NewsModel>();

		/* (2) Get article list */
		JSONArray article_list = response.getJSONArray("articles");

		/* (3) For each article -> create corresponding NewsModel */
		for( int i = 0, il = article_list.length() ; i < il ; i++ ){

			// {3.1} Get local copy of the JSON //
			JSONObject news_i = (JSONObject) article_list.get(i);

			// {3.2} Create new NewsModel //
			NewsModel news = new NewsModel();

			// {3.3} Set attributes //
			news.setAuthor(  news_i.getString("author")                       )
			.setDescription( news_i.getString("description")                  )
			.setTitle(       news_i.getString("title")                        )
			.setNewsURL(     news_i.getString("url")                          )
			.setImageURL(    news_i.getString("urlToImage")                   )
			.setSource(      news_i.getJSONObject("source").getString("name") )
			.addTag(         this.context.getCategory()                       );

			// {3.4} Add the date (can throw Ex) //
			try                      { news.setDate(news_i.getString("publishedAt")); }
			catch( ParseException e ){ news.setDate(new Date());                      }

			// {3.5} Add to the set //
			newsArr.add(news);

		}

		/* (4) Apply to Context */
		this.context.setNews(  newsArr        );
		this.context.setQuery( this.nextQuery );

		/* (5) Remove observers */
		this.context.removeObserver("newsApiCall");
		this.context.notifyObservers(new Event("NewsModel","NewsQuerySuccess"));

	}

	@Override
	public void onError(String errDesc) {

		System.out.println("Error: "+errDesc);
		this.context.removeObserver("newsApiCall");
		this.context.notifyObservers(new Event("NewsModel","NewsQueryFailed"));

	}

}