package com.example.despensapp.util

import android.content.Context
import androidx.biometric.BiometricManager
import androidx.biometric.BiometricManager.Authenticators.BIOMETRIC_STRONG
import androidx.biometric.BiometricManager.Authenticators.BIOMETRIC_WEAK
import androidx.biometric.BiometricPrompt
import androidx.core.content.ContextCompat
import androidx.fragment.app.FragmentActivity
import com.example.despensapp.R

object BiometricHelper {

    fun isBiometricAvailable(context: Context): Boolean {
        val biometricManager = BiometricManager.from(context)
        return when (biometricManager.canAuthenticate(BIOMETRIC_STRONG or BIOMETRIC_WEAK)) {
            BiometricManager.BIOMETRIC_SUCCESS -> true
            else -> false
        }
    }

    fun showBiometricPrompt(
        activity: FragmentActivity,
        onResult: (Boolean, String?) -> Unit
    ) {
        val executor = ContextCompat.getMainExecutor(activity)
        val biometricPrompt = BiometricPrompt(activity, executor,
            object : BiometricPrompt.AuthenticationCallback() {
                override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
                    super.onAuthenticationError(errorCode, errString)
                    onResult(false, errString.toString())
                }

                override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
                    super.onAuthenticationSucceeded(result)
                    onResult(true, null)
                }

                override fun onAuthenticationFailed() {
                    super.onAuthenticationFailed()
                    onResult(false, activity.getString(R.string.biometric_error_failed))
                }
            })

        val promptInfo = BiometricPrompt.PromptInfo.Builder()
            .setTitle(activity.getString(R.string.biometric_title))
            .setSubtitle(activity.getString(R.string.biometric_subtitle))
            .setNegativeButtonText(activity.getString(R.string.biometric_negative_button))
            .setAllowedAuthenticators(BIOMETRIC_STRONG or BIOMETRIC_WEAK)
            .build()

        biometricPrompt.authenticate(promptInfo)
    }
}