import 'package:adjust_sdk/adjust.dart';
import 'package:adjust_sdk/adjust_event.dart';
import 'package:shared_preferences/shared_preferences.dart';

/// Adjust 事件埋点（识别码见 docs/adjuest.md）
abstract final class AdjustEvents {
  // 购买档位（充值页选择档位时上报）
  static const String tier1999 = 'm0r9u9'; // 19.99
  static const String tier4999 = 'aht1ve'; // 49.99
  static const String tier599 = '47hhx9'; // 5.99
  static const String tier999 = 'w775gd'; // 9.99
  static const String tier9999 = 'y7994m'; // 99.99

  // 首日充值
  static const String firstPurchase = 'r6w4bi';

  // 支付失败
  static const String orderAbnormal = '4txlo1';

  // 支付成功
  static const String purchase = 'ek780r';

  // 注册（首次调用 fast_login 成功时）
  static const String register = '2z3dm4';

  // 其他
  static const String monthlyVip = '96o5ez'; // PetsHero AI Monthly VIP
  static const String weeklyVip = '95yg4o'; // PetsHero AI Weekly VIP

  /// 根据金额（如 19.99, 9.99）返回档位事件 token，无法匹配时返回 purchase
  static String? tierTokenFromPrice(num price) {
    final p = price.toStringAsFixed(2);
    switch (p) {
      case '5.99':
        return tier599;
      case '9.99':
        return tier999;
      case '19.99':
        return tier1999;
      case '49.99':
        return tier4999;
      case '99.99':
        return tier9999;
      default:
        return purchase;
    }
  }

  /// 从金额字符串解析数字（如 "¥19.99" / "\$19.99"）
  static num? parsePrice(String amount) {
    final match = RegExp(r'[\d.]+').firstMatch(amount);
    if (match == null) return null;
    return num.tryParse(match.group(0)!);
  }

  static void _track(String eventToken) {
    Adjust.trackEvent(AdjustEvent(eventToken));
  }

  /// 购买档位（用户点击某档位购买时）
  static void trackTier(String eventToken) {
    _track(eventToken);
  }

  /// 首日充值
  static void trackFirstPurchase() {
    _track(firstPurchase);
  }

  /// 支付失败
  static void trackOrderAbnormal() {
    _track(orderAbnormal);
  }

  /// 支付成功（若为首日充值需额外调用 trackFirstPurchase）
  static void trackPurchase() {
    _track(purchase);
  }

  /// 注册（首次 fast_login 成功）
  static void trackRegister() {
    _track(register);
  }

  /// PetsHero AI Monthly VIP
  static void trackMonthlyVip() {
    _track(monthlyVip);
  }

  /// PetsHero AI Weekly VIP
  static void trackWeeklyVip() {
    _track(weeklyVip);
  }

  static const String _keyRegisterDate = 'adjust_register_date';

  /// 支付成功时调用：上报 Purchase，若为首日充值则同时上报 first purchase
  static Future<void> trackPurchaseSuccess() async {
    _track(purchase);
    final prefs = await SharedPreferences.getInstance();
    final registerDate = prefs.getString(_keyRegisterDate);
    if (registerDate != null &&
        registerDate == DateTime.now().toIso8601String().substring(0, 10)) {
      _track(firstPurchase);
    }
  }

  /// 支付失败时调用
  static void trackPaymentFailed() {
    _track(orderAbnormal);
  }
}