// payment.dart — pay v2 支付领域模型(server 代理端点的响应形状)。
// 金额只读展示:price_minor 为 CNY 分;crypto 精确金额在 session.payload 里。

class PayCatalogItem {
  const PayCatalogItem({
    required this.sku,
    required this.plan,
    required this.days,
    required this.priceMinor,
    required this.currency,
  });

  final String sku;
  final String plan;
  final int days;
  final int priceMinor;
  final String currency;

  factory PayCatalogItem.fromJson(Map<String, dynamic> j) => PayCatalogItem(
        sku: j['sku'] as String,
        plan: j['plan'] as String? ?? 'pro',
        days: (j['days'] as num?)?.toInt() ?? 0,
        priceMinor: (j['price_minor'] as num?)?.toInt() ?? 0,
        currency: j['currency'] as String? ?? 'CNY',
      );

  String priceLabel() => '¥${(priceMinor / 100).toStringAsFixed(2)}';
}

class PaySession {
  const PaySession({required this.renderType, required this.payload, this.expiresAt});

  final String renderType; // crypto_address | redirect | qr
  final Map<String, dynamic> payload;
  final DateTime? expiresAt;

  factory PaySession.fromJson(Map<String, dynamic> j) => PaySession(
        renderType: j['render_type'] as String? ?? '',
        payload: (j['payload'] as Map<String, dynamic>?) ?? const {},
        expiresAt: j['expires_at'] == null ? null : DateTime.tryParse(j['expires_at'] as String),
      );
}

class PayOrder {
  const PayOrder({required this.orderNo, required this.session});

  final String orderNo;
  final PaySession session;

  factory PayOrder.fromJson(Map<String, dynamic> j) => PayOrder(
        orderNo: j['order_no'] as String,
        session: PaySession.fromJson((j['session'] as Map<String, dynamic>?) ?? const {}),
      );
}

class PayOrderStatus {
  const PayOrderStatus({
    required this.orderNo,
    required this.payStatus,
    required this.activated,
    this.expiresAt,
  });

  final String orderNo;
  final String payStatus;
  final bool activated; // server 台账已消费 = 权益已开通(轮询成功判据)
  final DateTime? expiresAt;

  factory PayOrderStatus.fromJson(Map<String, dynamic> j) => PayOrderStatus(
        orderNo: j['order_no'] as String? ?? '',
        payStatus: j['pay_status'] as String? ?? '',
        activated: j['activated'] as bool? ?? false,
        expiresAt: j['expires_at'] == null ? null : DateTime.tryParse(j['expires_at'] as String),
      );
}