package dolphin.android.net;

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

/**
 * Check device connectivity.
 * https://gist.github.com/emil2k/5130324
 * <p/>
 * Created by jimmyhu on 2015/3/27.
 */
public class ConnectivityUtils {
    public static boolean checkNetworkAvailable(Context context) {
        final NetworkInfo localNetworkInfo = getActiveNetworkInfo(context);
        return (localNetworkInfo != null) && (localNetworkInfo.isAvailable());
    }

    public static NetworkInfo getActiveNetworkInfo(Context context) {
        final ConnectivityManager connMgr =
                (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        return connMgr.getActiveNetworkInfo();
    }

    public static boolean isConnected(Context context) {
        final NetworkInfo localNetworkInfo = getActiveNetworkInfo(context);
        return (localNetworkInfo != null) && (localNetworkInfo.isConnected());
    }

    public static boolean isConnectedToMobile(Context context) {
        final NetworkInfo localNetworkInfo = getActiveNetworkInfo(context);
        return (localNetworkInfo != null) && (localNetworkInfo.isConnected()
                && localNetworkInfo.getType() == ConnectivityManager.TYPE_MOBILE);
    }

    public static boolean isConnectedToWiFi(Context context) {
        final NetworkInfo localNetworkInfo = getActiveNetworkInfo(context);
        return (localNetworkInfo != null) && (localNetworkInfo.isConnected()
                && localNetworkInfo.getType() == ConnectivityManager.TYPE_WIFI);
    }

    /**
     * Check if the connection is fast
     *
     * @param type    ConnectivityManager type
     * @param subType TelephonyManager type
     * @return
     */
    public static boolean isConnectionFast(int type, int subType) {
        if (type == ConnectivityManager.TYPE_WIFI) {
            return true;
        } else if (type == ConnectivityManager.TYPE_MOBILE) {
            switch (subType) {
                case TelephonyManager.NETWORK_TYPE_1xRTT:
                    return false; // ~ 50-100 kbps
                case TelephonyManager.NETWORK_TYPE_CDMA:
                    return false; // ~ 14-64 kbps
                case TelephonyManager.NETWORK_TYPE_EDGE:
                    return false; // ~ 50-100 kbps
                case TelephonyManager.NETWORK_TYPE_EVDO_0:
                    return true; // ~ 400-1000 kbps
                case TelephonyManager.NETWORK_TYPE_EVDO_A:
                    return true; // ~ 600-1400 kbps
                case TelephonyManager.NETWORK_TYPE_GPRS:
                    return false; // ~ 100 kbps
                case TelephonyManager.NETWORK_TYPE_HSDPA:
                    return true; // ~ 2-14 Mbps
                case TelephonyManager.NETWORK_TYPE_HSPA:
                    return true; // ~ 700-1700 kbps
                case TelephonyManager.NETWORK_TYPE_HSUPA:
                    return true; // ~ 1-23 Mbps
                case TelephonyManager.NETWORK_TYPE_UMTS:
                    return true; // ~ 400-7000 kbps
            /*
             * Above API level 7, make sure to set android:targetSdkVersion
			 * to appropriate level to use these
			 */
                case TelephonyManager.NETWORK_TYPE_EHRPD: // API level 11
                    return true; // ~ 1-2 Mbps
                case TelephonyManager.NETWORK_TYPE_EVDO_B: // API level 9
                    return true; // ~ 5 Mbps
                case TelephonyManager.NETWORK_TYPE_HSPAP: // API level 13
                    return true; // ~ 10-20 Mbps
                case TelephonyManager.NETWORK_TYPE_IDEN: // API level 8
                    return false; // ~25 kbps
                case TelephonyManager.NETWORK_TYPE_LTE: // API level 11
                    return true; // ~ 10+ Mbps
                // Unknown
                case TelephonyManager.NETWORK_TYPE_UNKNOWN:
                default:
                    return false;
            }
        } else {
            return false;
        }
    }

    public static boolean isConnectedFastEnough(Context context) {
        if (!isConnected(context))
            return false;
        final NetworkInfo localNetworkInfo = getActiveNetworkInfo(context);
        return isConnectionFast(localNetworkInfo.getType(), localNetworkInfo.getSubtype());
    }
}

add connectitivity utils