/// Database schema for click_payment table.
///
/// Stores Cliq wallet payment transactions for manual verification.
///
/// SQL (MySQL):
/// ```sql
/// CREATE TABLE click_payment (
///   id            INT AUTO_INCREMENT PRIMARY KEY,
///   user_id       VARCHAR(64)   NOT NULL COMMENT 'Passenger ID from passengers table',
///   user_type     VARCHAR(20)   NOT NULL DEFAULT 'passenger',
///   amount        DECIMAL(10,2) NOT NULL,
///   currency      VARCHAR(6)    NOT NULL DEFAULT 'JOD',
///   click_phone   VARCHAR(20)   NOT NULL COMMENT 'Phone number used for Cliq invoice',
///   invoice_number VARCHAR(64)  NOT NULL UNIQUE COMMENT 'Unique invoice reference',
///   cliq_alias    VARCHAR(64)   NOT NULL COMMENT 'Cliq wallet alias for payment',
///   invoice_status ENUM('pending','completed','failed','expired') NOT NULL DEFAULT 'pending',
///   proof_text    TEXT          DEFAULT NULL COMMENT 'Bank SMS proof pasted by user',
///   proof_image   VARCHAR(256)  DEFAULT NULL COMMENT 'Screenshot path (optional)',
///   verified_by   VARCHAR(64)   DEFAULT NULL COMMENT 'Admin who verified manually',
///   verified_at   DATETIME      DEFAULT NULL,
///   created_at    DATETIME      NOT NULL DEFAULT CURRENT_TIMESTAMP,
///   updated_at    DATETIME      NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
///   INDEX idx_user (user_id),
///   INDEX idx_status (invoice_status),
///   INDEX idx_invoice (invoice_number)
/// );
/// ```
class ClickPaymentSchema {
  static const String tableName = 'click_payment';

  static const String createTable = '''
CREATE TABLE click_payment (
  id            INT AUTO_INCREMENT PRIMARY KEY,
  user_id       VARCHAR(64)   NOT NULL,
  user_type     VARCHAR(20)   NOT NULL DEFAULT 'passenger',
  amount        DECIMAL(10,2) NOT NULL,
  currency      VARCHAR(6)    NOT NULL DEFAULT 'JOD',
  click_phone   VARCHAR(20)   NOT NULL,
  invoice_number VARCHAR(64)  NOT NULL UNIQUE,
  cliq_alias    VARCHAR(64)   NOT NULL,
  invoice_status ENUM('pending','completed','failed','expired') NOT NULL DEFAULT 'pending',
  proof_text    TEXT          DEFAULT NULL,
  proof_image   VARCHAR(256)  DEFAULT NULL,
  verified_by   VARCHAR(64)   DEFAULT NULL,
  verified_at   DATETIME      DEFAULT NULL,
  created_at    DATETIME      NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at    DATETIME      NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  INDEX idx_user (user_id),
  INDEX idx_status (invoice_status),
  INDEX idx_invoice (invoice_number)
)
''';

  /// Map a JSON response from the API to a typed object.
  final int? id;
  final String userId;
  final String userType;
  final double amount;
  final String currency;
  final String clickPhone;
  final String invoiceNumber;
  final String cliqAlias;
  final String invoiceStatus;
  final String? proofText;
  final String? proofImage;
  final String? verifiedBy;
  final DateTime? verifiedAt;
  final DateTime? createdAt;
  final DateTime? updatedAt;

  const ClickPaymentSchema({
    this.id,
    required this.userId,
    this.userType = 'passenger',
    required this.amount,
    this.currency = 'JOD',
    required this.clickPhone,
    required this.invoiceNumber,
    required this.cliqAlias,
    this.invoiceStatus = 'pending',
    this.proofText,
    this.proofImage,
    this.verifiedBy,
    this.verifiedAt,
    this.createdAt,
    this.updatedAt,
  });

  factory ClickPaymentSchema.fromJson(Map<String, dynamic> json) {
    return ClickPaymentSchema(
      id: json['id'] is int ? json['id'] : int.tryParse(json['id']?.toString() ?? ''),
      userId: json['user_id']?.toString() ?? '',
      userType: json['user_type']?.toString() ?? 'passenger',
      amount: (json['amount'] is num) ? (json['amount'] as num).toDouble() : double.tryParse(json['amount']?.toString() ?? '0') ?? 0,
      currency: json['currency']?.toString() ?? 'JOD',
      clickPhone: json['click_phone']?.toString() ?? '',
      invoiceNumber: json['invoice_number']?.toString() ?? '',
      cliqAlias: json['cliq_alias']?.toString() ?? '',
      invoiceStatus: json['invoice_status']?.toString() ?? 'pending',
      proofText: json['proof_text']?.toString(),
      proofImage: json['proof_image']?.toString(),
      verifiedBy: json['verified_by']?.toString(),
      verifiedAt: json['verified_at'] != null ? DateTime.tryParse(json['verified_at'].toString()) : null,
      createdAt: json['created_at'] != null ? DateTime.tryParse(json['created_at'].toString()) : null,
      updatedAt: json['updated_at'] != null ? DateTime.tryParse(json['updated_at'].toString()) : null,
    );
  }

  Map<String, dynamic> toJson() => {
    if (id != null) 'id': id,
    'user_id': userId,
    'user_type': userType,
    'amount': amount,
    'currency': currency,
    'click_phone': clickPhone,
    'invoice_number': invoiceNumber,
    'cliq_alias': cliqAlias,
    'invoice_status': invoiceStatus,
    if (proofText != null) 'proof_text': proofText,
    if (proofImage != null) 'proof_image': proofImage,
    if (verifiedBy != null) 'verified_by': verifiedBy,
    if (verifiedAt != null) 'verified_at': verifiedAt!.toIso8601String(),
  };
}