package com.jc.jcfw.security;

import static androidx.biometric.BiometricManager.Authenticators.BIOMETRIC_STRONG;
import static androidx.biometric.BiometricManager.Authenticators.DEVICE_CREDENTIAL;

import android.content.Context;
import android.util.Log;

import androidx.annotation.NonNull;
import androidx.biometric.BiometricPrompt;
import androidx.core.content.ContextCompat;
import androidx.fragment.app.FragmentActivity;

import com.cege.games.release.R;

import java.util.concurrent.Executor;
import java.util.function.Consumer;

import javax.crypto.Cipher;

public class BiometricHelper {

  public static final int ERROR_BIOMETRIC_FAIL = 100;
  public static final int ERROR_BIOMETRIC_NO_CIPHER = 101;
  private static final String TAG = BiometricHelper.class.getSimpleName();
  public static BiometricPrompt.PromptInfo createPromptInfo(Context context) {
    BiometricPrompt.PromptInfo promptInfo = new BiometricPrompt.PromptInfo.Builder()
        .setTitle(context.getString(R.string.prompt_info_title)) // e.g. "Sign in"
        .setSubtitle(context.getString(R.string.prompt_info_subtitle)) // e.g. "Biometric for My App"
        .setDescription(context.getString(R.string.prompt_info_description)) // e.g. "Confirm biometric to continue"
        .setConfirmationRequired(false)
        .setAllowedAuthenticators(BIOMETRIC_STRONG | DEVICE_CREDENTIAL)
//                 .setDeviceCredentialAllowed(true) // Allow PIN/pattern/password authentication.
        // Also note that setDeviceCredentialAllowed and setNegativeButtonText are
        // incompatible so that if you uncomment one you must comment out the other
        .build();
    return promptInfo;
  }

  public static BiometricPrompt createBiometricPrompt(FragmentActivity activity, Consumer<BiometricResult> func) {
    Executor executor = ContextCompat.getMainExecutor(activity.getApplicationContext());
    return new BiometricPrompt(activity, executor, new BiometricPrompt.AuthenticationCallback() {
      @Override
      public void onAuthenticationError(int errcode, @NonNull CharSequence errString) {
        super.onAuthenticationError(errcode, errString);
        Log.i(TAG, "Authentication error: " + errcode +" | "+ errString);
        func.accept(new BiometricResult(errcode, (String) errString));
      }
      @Override
      public void onAuthenticationFailed() {
        super.onAuthenticationFailed();
        Log.i(TAG, "Authentication failed!");
        func.accept(new BiometricResult(ERROR_BIOMETRIC_FAIL, "Authentication failed"));
      }
      @Override
      public void onAuthenticationSucceeded(@NonNull BiometricPrompt.AuthenticationResult result) {
        super.onAuthenticationSucceeded(result);
        Log.i(TAG, "Authentication succeeded!");
        func.accept(new BiometricResult(result.getCryptoObject().getCipher()));
      }
    });
  }
}