using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;

public class NetworkService : MonoBehaviour
{
    private const string xmlApi = "http://a...content-available-to-author-only...p.org/data/2.5/weather?q=Chicago,us&mode=xml";
    private const string webImage = "http://u...content-available-to-author-only...a.org/wikipedia/commons/c/c5/Moraine_Lake_17092005.jpg";

    private bool IsResponseValid(WWW www)
    {
        if(!string.IsNullOrEmpty(www.error))
        {
            Debug.Log("bad connection");

            return false;
        }

        else if(string.IsNullOrEmpty(www.text))
        {
            Debug.Log("bad data");

            return false;
        }

        else
        {
            //all good
            return true;
        }
    }

    private IEnumerator CallAPI (string url, Action<string> callback)
    {
        WWW www = new WWW(url);

        yield return www;

        if(!IsResponseValid(www))
        {
            yield break;
        }

        callback(www.text);
    }

    public IEnumerator GetWeatherXML(Action<string> callback)
    {
        return CallAPI(xmlApi, callback);
    }

    public IEnumerator DownloadImage(Action<Texture2D> callback)
    {
        WWW www = new WWW(webImage);

        yield return www;

        callback(www.texture);
    }

    // Use this for initialization
    void Start ()
    {
       
    }
   
    // Update is called once per frame
    void Update ()
    {
       
    }
}