import 'dart:math';

import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../../injection.dart';
import '../constant/local_storage_key.dart';

void dismissKeyboard(BuildContext context) {
  final currentFocus = FocusScope.of(context);
  if (!currentFocus.hasPrimaryFocus && currentFocus.focusedChild != null) {
    FocusManager.instance.primaryFocus?.unfocus();
  }
}

String getNormalizePhone(String phoneNumber) {
  final normalizedPhone = phoneNumber.startsWith('08')
      ? phoneNumber.replaceFirst('0', '')
      : phoneNumber;
  return '62$normalizedPhone';
}

/// UUID v4 acak dari [Random.secure], dipakai sebagai `Idempotency-Key`
/// dan `device_id`.
String generateUuidV4() {
  final random = Random.secure();
  final bytes = List<int>.generate(16, (_) => random.nextInt(256));
  bytes[6] = (bytes[6] & 0x0f) | 0x40;
  bytes[8] = (bytes[8] & 0x3f) | 0x80;
  final hex = bytes.map((b) => b.toRadixString(16).padLeft(2, '0')).join();
  return '${hex.substring(0, 8)}-${hex.substring(8, 12)}-'
      '${hex.substring(12, 16)}-${hex.substring(16, 20)}-${hex.substring(20)}';
}

Map<String, dynamic> getAuthorizationHeader() {
  return {
    'Authorization':
        'Bearer ${getIt<SharedPreferences>().getString(LocalStorageKey.token)}',
  };
}