package com.mogo.utils;

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.os.Build;
import android.provider.Settings;
import android.telephony.TelephonyManager;
import android.text.TextUtils;

import androidx.core.content.ContextCompat;


import com.mogo.utils.storage.SharedPrefsMgr;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public final class DeviceIdUtils {

    public static final String KEY_DEVICE_ID = "deviceId";

    private DeviceIdUtils() {}

    private static void saveDeviceId( Context context, String deviceId){
        SharedPrefsMgr.getInstance(context).putString(KEY_DEVICE_ID, deviceId);
    }

    public static String getDeviceId( Context context) {
        if(context == null){
            throw new NullPointerException("context must not be null.");
        }

        final Context appContext = context.getApplicationContext();
        String deviceId = SharedPrefsMgr.getInstance( context ).getString( KEY_DEVICE_ID );

        if ( TextUtils.isEmpty( deviceId )) {
            deviceId = getDeviceIdInternal(appContext);
            if (TextUtils.isEmpty(deviceId)) {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                    if (ContextCompat.checkSelfPermission(context, Manifest.permission.READ_PHONE_STATE) == PackageManager.PERMISSION_GRANTED) {
                        deviceId = ((TelephonyManager) appContext.getSystemService(Context.TELEPHONY_SERVICE)).getSimSerialNumber();
                    }
                } else {
                    deviceId = ((TelephonyManager) appContext.getSystemService(Context.TELEPHONY_SERVICE)).getSimSerialNumber();
                }
                if (TextUtils.isEmpty(deviceId)) {
                    deviceId = getDeviceSerial();
                    if (TextUtils.isEmpty(deviceId) || deviceId.equalsIgnoreCase("unknown")) {
                        deviceId = getAndroidId(appContext);
                        if (TextUtils.isEmpty(deviceId)) {
                            deviceId = String.valueOf(System.currentTimeMillis());
                        }
                    }
                }
            }
            saveDeviceId(appContext,deviceId);
        }

        return deviceId;
    }

    private static String getDeviceIdInternal( Context context) {
        String id = "";

        if ( Build.VERSION.SDK_INT >= Build.VERSION_CODES.M ) {
            if ( ContextCompat.checkSelfPermission( context, Manifest.permission.READ_PHONE_STATE ) != PackageManager.PERMISSION_GRANTED ) {
                return id;
            }
        }

        TelephonyManager telephonymanager = ( TelephonyManager ) context.getSystemService( Context.TELEPHONY_SERVICE);
        if (telephonymanager != null) {
            id = telephonymanager.getDeviceId();
            if ( TextUtils.isEmpty(id))
                id = "";
        }
        return id;
    }

    private static String getAndroidId( Context context) {
        String s = "";
        s = Settings.Secure.getString(context.getContentResolver(), "android_id");
        if ( TextUtils.isEmpty(s))
            s = "";
        return s;
    }

    private static String getDeviceSerial() {
        String serial = "unknown";
        try {
            Class clazz = Class.forName("android.os.Build");
            Class paraTypes = Class.forName("java.lang.String");
            Method method = clazz.getDeclaredMethod("getString", paraTypes);
            if (!method.isAccessible()) {
                method.setAccessible(true);
            }
            serial = ( String ) method.invoke(new Build(), "ro.serialno");
        } catch ( ClassNotFoundException e) {
            e.printStackTrace();
        } catch ( NoSuchMethodException e) {
            e.printStackTrace();
        } catch ( InvocationTargetException e) {
            e.printStackTrace();
        } catch ( IllegalAccessException e) {
            e.printStackTrace();
        }
        return serial;
    }
}