import 'package:flutter/foundation.dart';

enum TransactionType { income, expense }

enum RecurrenceType { none, daily, weekly, monthly }

@immutable
class Transaction {
  final String id;
  final double amount;
  final String category;
  final TransactionType type;
  final DateTime date;
  final String? note;
  final RecurrenceType recurrence;
  final DateTime? lastOccurrence;
  final String currency;
  final String currencyCode;
  final int accountId;

  const Transaction({
    required this.id,
    required this.amount,
    required this.category,
    required this.type,
    required this.date,
    this.note,
    this.recurrence = RecurrenceType.none,
    this.lastOccurrence,
    this.currency = '\$',
    this.currencyCode = 'USD',
    required this.accountId,
  });

  factory Transaction.fromJson(Map<String, dynamic> json) => Transaction(
        id: json['id'] as String,
        amount: (json['amount'] as num).toDouble(),
        category: json['category'] as String,
        type: TransactionType.values.firstWhere(
          (e) => e.name == json['type'],
        ),
        date: DateTime.parse(json['date'] as String),
        note: json['note'] as String?,
        recurrence: json['recurrence'] != null
            ? RecurrenceType.values.firstWhere(
                (e) => e.name == json['recurrence'],
                orElse: () => RecurrenceType.none,
              )
            : RecurrenceType.none,
        lastOccurrence: json['lastOccurrence'] != null
            ? DateTime.parse(json['lastOccurrence'] as String)
            : null,
        currency: json['currency'] as String? ?? '\$',
        currencyCode: json['currencyCode'] as String? ?? 'USD',
        accountId: json['accountId'] as int,
      );

  Map<String, dynamic> toJson() => {
        'id': id,
        'amount': amount,
        'category': category,
        'type': type.name,
        'date': date.toIso8601String(),
        'note': note,
        'recurrence': recurrence.name,
        'lastOccurrence': lastOccurrence?.toIso8601String(),
        'currency': currency,
        'currencyCode': currencyCode,
        'accountId': accountId,
      };

  Transaction copyWith({
    String? id,
    double? amount,
    String? category,
    TransactionType? type,
    DateTime? date,
    String? note,
    RecurrenceType? recurrence,
    DateTime? lastOccurrence,
    String? currency,
    String? currencyCode,
    int? accountId,
  }) =>
      Transaction(
        id: id ?? this.id,
        amount: amount ?? this.amount,
        category: category ?? this.category,
        type: type ?? this.type,
        date: date ?? this.date,
        note: note ?? this.note,
        recurrence: recurrence ?? this.recurrence,
        lastOccurrence: lastOccurrence ?? this.lastOccurrence,
        currency: currency ?? this.currency,
        currencyCode: currencyCode ?? this.currencyCode,
        accountId: accountId ?? this.accountId,
      );
}