/*
 * Copyright (C) 2016 Nishant Srivastava
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package github.nisrulz.androidutils.network;

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

import androidx.annotation.RequiresPermission;

/**
 * The type Network utils.
 *
 * @author Nishant Srivastava
 */
public class NetworkUtils {

    private NetworkUtils() {
        throw new UnsupportedOperationException(
                "Should not create instance of Util class. Please use as static..");
    }

    /**
     * Get the network info
     *
     * @param context the context
     * @return network info
     */
    @RequiresPermission(permission.ACCESS_NETWORK_STATE)
    public static NetworkInfo getNetworkInfo(Context context) {
        ConnectivityManager cm =
                (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        return cm.getActiveNetworkInfo();
    }

    /**
     * Check if there is any connectivity
     *
     * @param context the context
     * @return boolean boolean
     */
    @RequiresPermission(permission.ACCESS_NETWORK_STATE)
    public static boolean isConnected(Context context) {
        NetworkInfo info = getNetworkInfo(context);
        return (info != null && info.isConnected());
    }

    /**
     * Check if there is fast connectivity
     *
     * @param context the context
     * @return boolean boolean
     */
    @RequiresPermission(permission.ACCESS_NETWORK_STATE)
    public static boolean isConnectedFast(Context context) {
        NetworkInfo info = getNetworkInfo(context);
        return (info != null && info.isConnected() && isConnectionFast(info.getType(),
                info.getSubtype()));
    }

    /**
     * Check if there is any connectivity to a mobile network
     *
     * @param context the context
     * @return boolean boolean
     */
    @RequiresPermission(permission.ACCESS_NETWORK_STATE)
    public static boolean isConnectedMobile(Context context) {
        NetworkInfo info = getNetworkInfo(context);
        return (info != null
                && info.isConnected()
                && info.getType() == ConnectivityManager.TYPE_MOBILE);
    }

    /**
     * Check if there is any connectivity to a Wifi network
     *
     * @param context the context
     * @return boolean boolean
     */
    @RequiresPermission(permission.ACCESS_NETWORK_STATE)
    public static boolean isConnectedWifi(Context context) {
        NetworkInfo info = getNetworkInfo(context);
        return (info != null && info.isConnected() && info.getType() == ConnectivityManager.TYPE_WIFI);
    }

    /**
     * Check if the connection is fast
     *
     * @param type    the type
     * @param subType the sub type
     * @return boolean boolean
     */
    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;
        }
    }
}
