package com.ym.game.netstate;

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

import androidx.annotation.RequiresPermission;

/**
 * @author (wangXuewei)
 * @datetime 2020-10-21 14:35 GMT+8
 * @detail :
 */
public class NetworkUtil {
    private NetworkUtil() {
        throw new UnsupportedOperationException("u can't instantiate me...");
    }

    @RequiresPermission("android.permission.ACCESS_NETWORK_STATE")
    private static NetworkInfo getActiveNetworkInfo(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        return cm.getActiveNetworkInfo();
    }

    /**
     * 获取当前网络类型
     * 需添加权限 {@code <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>}
     */
    @RequiresPermission("android.permission.ACCESS_NETWORK_STATE")
    public static NetworkType getNetworkType(Context context) {
        NetworkType netType = NetworkType.NETWORK_NO;
        NetworkInfo info = getActiveNetworkInfo(context);
        if (info != null && info.isAvailable()) {

            if (info.getType() == ConnectivityManager.TYPE_WIFI) {
                netType = NetworkType.NETWORK_WIFI;
            } else if (info.getType() == ConnectivityManager.TYPE_MOBILE) {
                switch (info.getSubtype()) {

                    case TelephonyManager.NETWORK_TYPE_TD_SCDMA:
                    case TelephonyManager.NETWORK_TYPE_EVDO_A:
                    case TelephonyManager.NETWORK_TYPE_UMTS:
                    case TelephonyManager.NETWORK_TYPE_EVDO_0:
                    case TelephonyManager.NETWORK_TYPE_HSDPA:
                    case TelephonyManager.NETWORK_TYPE_HSUPA:
                    case TelephonyManager.NETWORK_TYPE_HSPA:
                    case TelephonyManager.NETWORK_TYPE_EVDO_B:
                    case TelephonyManager.NETWORK_TYPE_EHRPD:
                    case TelephonyManager.NETWORK_TYPE_HSPAP:
                        netType = NetworkType.NETWORK_3G;
                        break;

                    case TelephonyManager.NETWORK_TYPE_LTE:
                    case TelephonyManager.NETWORK_TYPE_IWLAN:
                        netType = NetworkType.NETWORK_4G;
                        break;

                    case TelephonyManager.NETWORK_TYPE_GSM:
                    case TelephonyManager.NETWORK_TYPE_GPRS:
                    case TelephonyManager.NETWORK_TYPE_CDMA:
                    case TelephonyManager.NETWORK_TYPE_EDGE:
                    case TelephonyManager.NETWORK_TYPE_1xRTT:
                    case TelephonyManager.NETWORK_TYPE_IDEN:
                        netType = NetworkType.NETWORK_2G;
                        break;
                    default:
                        String subtypeName = info.getSubtypeName();
                        if (subtypeName.equalsIgnoreCase("TD-SCDMA")
                                || subtypeName.equalsIgnoreCase("WCDMA")
                                || subtypeName.equalsIgnoreCase("CDMA2000")) {
                            netType = NetworkType.NETWORK_3G;
                        } else {
                            netType = NetworkType.NETWORK_UNKNOWN;
                        }
                        break;
                }
            } else {
                netType = NetworkType.NETWORK_UNKNOWN;
            }
        }
        return netType;
    }
}
