/// Modèle portefeuille électronique.
class Wallet {
  const Wallet({
    required this.currency,
    required this.currentBalance,
    this.status = 'active',
  });

  final String currency;
  final double currentBalance;
  final String status;

  factory Wallet.fromJson(Map<String, dynamic> json) {
    return Wallet(
      currency: json['currency'] as String? ?? 'EUR',
      currentBalance: (json['current_balance'] as num?)?.toDouble() ?? 0,
      status: json['status'] as String? ?? 'active',
    );
  }
}

/// Mouvement sur le portefeuille.
class WalletTransaction {
  const WalletTransaction({
    required this.uuid,
    required this.type,
    required this.amount,
    required this.balanceAfter,
    required this.createdAt,
    this.metadata = const {},
  });

  final String uuid;
  final String type;
  final double amount;
  final double balanceAfter;
  final DateTime? createdAt;
  final Map<String, dynamic> metadata;

  String get displayLabel {
    final label = metadata['label'];
    if (label is String && label.isNotEmpty) {
      return label;
    }

    return switch (type) {
      'credit' => 'Crédit',
      'debit' => 'Débit',
      'refund' => 'Remboursement',
      'hold' => 'Blocage',
      'release' => 'Libération',
      'adjustment' => 'Ajustement',
      _ => type,
    };
  }

  String? get displaySubtitle {
    final stripeMap = _asStringMap(metadata['stripe']);
    if (stripeMap != null) {
      final brand = stripeMap['card_brand'];
      final last4 = stripeMap['card_last4'];
      if (brand is String && last4 is String) {
        return '${_formatCardBrand(brand)} •••• $last4';
      }

      final paymentIntentId = stripeMap['payment_intent_id'];
      if (paymentIntentId is String && paymentIntentId.isNotEmpty) {
        return 'Stripe $paymentIntentId';
      }
    }

    final providerPaymentId = metadata['provider_payment_id'];
    if (providerPaymentId is String && providerPaymentId.isNotEmpty) {
      return providerPaymentId;
    }

    return null;
  }

  static Map<String, dynamic>? _asStringMap(dynamic value) {
    if (value == null) return null;
    if (value is Map<String, dynamic>) return value;
    if (value is Map) return Map<String, dynamic>.from(value);
    return null;
  }

  static String _formatCardBrand(String brand) {
    if (brand.isEmpty) return 'Carte';
    return switch (brand.toLowerCase()) {
      'visa' => 'Visa',
      'mastercard' => 'Mastercard',
      'amex' => 'Amex',
      _ => brand[0].toUpperCase() + brand.substring(1),
    };
  }

  factory WalletTransaction.fromJson(Map<String, dynamic> json) {
    return WalletTransaction(
      uuid: json['uuid'] as String,
      type: json['type'] as String,
      amount: (json['amount'] as num?)?.toDouble() ?? 0,
      balanceAfter: (json['balance_after'] as num?)?.toDouble() ?? 0,
      createdAt: json['created_at'] != null
          ? DateTime.tryParse(json['created_at'] as String)
          : null,
      metadata: _parseMetadata(json['metadata']),
    );
  }

  static Map<String, dynamic> _parseMetadata(dynamic value) {
    if (value == null) {
      return const {};
    }
    if (value is Map<String, dynamic>) {
      return value;
    }
    if (value is Map) {
      return Map<String, dynamic>.from(value);
    }
    return const {};
  }
}