import 'package:equatable/equatable.dart';

class DerivativeItemModel extends Equatable {
  final String isin;
  final String name;
  final String optionType;
  final String productCategoryName;
  final String nextGenProductCategoryName;
  final double strike;
  final double barrier;
  final double leverage;
  final double? size;
  final double? factor;
  final double? delta;
  final String currency;
  final String? expiry;
  final String issuer;
  final String issuerDisplayName;
  final String? issuerImageId;
  final String underlyingIsin;

  const DerivativeItemModel({
    required this.isin,
    this.name = '',
    this.optionType = 'Long',
    this.productCategoryName = '',
    this.nextGenProductCategoryName = '',
    this.strike = 0.0,
    this.barrier = 0.0,
    this.leverage = 1.0,
    this.size,
    this.factor,
    this.delta,
    this.currency = 'EUR',
    this.expiry,
    this.issuer = '',
    this.issuerDisplayName = '',
    this.issuerImageId,
    this.underlyingIsin = '',
  });

  bool get isLong => optionType.toLowerCase().contains('long') || optionType.toLowerCase().contains('call');

  double distanceToBarrier(double currentUnderlyingPrice) {
    if (barrier <= 0 || currentUnderlyingPrice <= 0) return 0.0;
    return ((currentUnderlyingPrice - barrier).abs() / currentUnderlyingPrice) * 100.0;
  }

  factory DerivativeItemModel.fromJson(Map<String, dynamic> json) {
    double parseDbl(dynamic val) {
      if (val == null) return 0.0;
      if (val is num) return val.toDouble();
      return double.tryParse(val.toString()) ?? 0.0;
    }

    double? parseOptDbl(dynamic val) {
      if (val == null) return null;
      if (val is num) return val.toDouble();
      return double.tryParse(val.toString());
    }

    return DerivativeItemModel(
      isin: json['isin']?.toString() ?? '',
      name: json['name']?.toString() ?? '',
      optionType: json['optionType']?.toString() ?? 'Long',
      productCategoryName: json['productCategoryName']?.toString() ?? '',
      nextGenProductCategoryName: json['nextGenProductCategoryName']?.toString() ?? '',
      strike: parseDbl(json['strike']),
      barrier: parseDbl(json['barrier']),
      leverage: parseDbl(json['leverage']),
      size: parseOptDbl(json['size']),
      factor: parseOptDbl(json['factor']),
      delta: parseOptDbl(json['delta']),
      currency: json['currency']?.toString() ?? 'EUR',
      expiry: json['expiry']?.toString(),
      issuer: json['issuer']?.toString() ?? '',
      issuerDisplayName: json['issuerDisplayName']?.toString() ?? (json['issuer']?.toString() ?? ''),
      issuerImageId: json['issuerImageId']?.toString(),
      underlyingIsin: json['underlyingIsin']?.toString() ?? '',
    );
  }

  @override
  List<Object?> get props => [
        isin,
        name,
        optionType,
        productCategoryName,
        strike,
        barrier,
        leverage,
        issuer,
        underlyingIsin,
      ];
}