package com.example.news;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

import com.google.gson.Gson;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
//請求網路需要使用INTERNET許可權
//<uses-permission android:name="android.permission.INTERNET" />
//判斷網路型別需要使用ACCESS_NETWORK_STATE許可權
  // <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

public class Uilts {
    //判斷網路是否有效
    public static boolean isNetwork(Context context){
        //獲取連線管理服務
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        //得到連線狀態
        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
        //不為空且以有效
        return activeNetworkInfo!=null&&activeNetworkInfo.isAvailable();
    }

    //判斷是否是手機網路
    public static boolean isMobileNetwork (Context context){
        //獲取連線管理服務
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        //得到連線狀態
        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
        //返回是否是手機網路
        return activeNetworkInfo.getType()==ConnectivityManager.TYPE_MOBILE;
    }


    //定義請求網路資料方法
    public static InputStream queryNetworkData(String s,Context context){
        String string ="";

        try {
            //得到網路路徑
            URL url = new URL(s);
            //開啟網路連線
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            //設定請求方式
            urlConnection.setRequestMethod("GET");
            //檢視是否是手機網路,如果是適當延長載入時間
            boolean mobileNetwork = isMobileNetwork(context);
            int times;
            if(mobileNetwork){
                times=10000;
            }else{
                times=5000;
            }
            //讀取超時
            urlConnection.setReadTimeout(times);
            //網路連線請求超時
            urlConnection.setConnectTimeout(times);
            //得到連線返回碼,胖多是否請求成功
            int responseCode = urlConnection.getResponseCode();
            //判斷請求碼型別進行不同操作
            switch (responseCode){
                case 200:
                    //請求成功,得到網路資料,解析資料得到集合
                   return  urlConnection.getInputStream();

            }
        } catch (java.io.IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    //將資料轉化為字串              ↓位元組流
    public static String getString (InputStream is)  {
        //字元流
        InputStreamReader isr = new InputStreamReader(is);
        //字元緩衝流
        BufferedReader br = new BufferedReader(isr);
        //建立一個可追加字串用來接收資料
        StringBuilder builder = new StringBuilder();
        //迴圈得到所有資料
        try {
            for (String i = br.readLine();i!=null;i = br.readLine()){
                builder.append(i);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return builder.toString();
    }

    //Gson 解析  泛型
    public static <E>E queryNewsLiatData(String s,Class clazz){
        E e = (E)new Gson().fromJson(s,clazz);
        return e;
    }
}