import 'dart:convert';

import 'wallet.dart';

/// Local BFF transport only; provider and widgets never parse response maps.
class BackendDTO {
  BackendDTO.decode(String body) {
    final envelope = jsonDecode(body) as Map<String, dynamic>;
    accepted = envelope['status'] == 'success';
    data = envelope['data'];
  }
  late final bool accepted;
  late final dynamic data;
  String get error =>
      (data as Map<String, dynamic>?)?['error'] as String? ?? 'unavailable';
  String get locale => (data as Map<String, dynamic>)['locale'] as String;
  String get key => (data as Map<String, dynamic>)['idempotencyKey'] as String;
  List<AccountDTO> get accounts =>
      ((data as Map<String, dynamic>)['accounts'] as List).map((v) {
        final d = v as Map<String, dynamic>;
        return AccountDTO(
          d['id'] as String,
          d['currency'] as String,
          d['precision'] as int,
          d['available'] as int,
          payoutMethod: d['payoutMethod'] as String,
          payoutLabel: d['payoutLabel'] as String,
          canFund: d['canFund'] as bool,
        );
      }).toList();
  List<OperationDTO> get operations =>
      ((data as Map<String, dynamic>)['operations'] as List)
          .map((v) => operation(v as Map<String, dynamic>))
          .toList();
  QuoteDTO get quoteValue => quote(data as Map<String, dynamic>);
  OperationDTO? get operationValue =>
      data == null ? null : operation(data as Map<String, dynamic>);
  static QuoteDTO quote(Map<String, dynamic> d) {
    final r = d['request'] as Map<String, dynamic>;
    return QuoteDTO(
      d['id'] as String,
      RequestDTO(
        r['kind'] as String,
        r['source'] as String,
        (r['destination'] as String?)?.isEmpty == true
            ? null
            : r['destination'] as String?,
        r['amount'] as int,
        r['recipient'] as String? ?? '',
      ),
      d['fee'] as int,
      d['debit'] as int,
      d['credit'] as int,
      DateTime.parse(d['expiresAt'] as String),
      d['rateNumerator'] as int,
      d['rateDenominator'] as int,
    );
  }

  static OperationDTO operation(Map<String, dynamic> d) => OperationDTO(
    d['id'] as String,
    quote(d['quote'] as Map<String, dynamic>),
    DateTime.parse(d['createdAt'] as String),
    DateTime.parse(d['createdAt'] as String),
    status: d['status'] as String,
  );
  ChallengeDTO get challenge => ChallengeDTO(data as Map<String, dynamic>);
}

class ChallengeDTO {
  ChallengeDTO(Map<String, dynamic> d)
    : id = d['challengeId'] as String,
      target = d['target'] as String,
      expires = DateTime.parse(d['expiresAt'] as String),
      resend = DateTime.parse(d['resendAt'] as String);
  final String id, target;
  final DateTime expires, resend;
}