import 'package:json_annotation/json_annotation.dart';

import 'meal_type.dart';

part 'user.g.dart';

@JsonSerializable()
class User {
  final String id;
  final String email;
  final String name;
  @JsonKey(name: 'avatar_url')
  final String? avatarUrl;
  @JsonKey(name: 'height_cm')
  final int? heightCm;
  @JsonKey(name: 'weight_kg')
  final double? weightKg;
  @JsonKey(name: 'date_of_birth')
  final String? dateOfBirth;
  final String? gender;
  final String? activity;
  final String? goal;
  @JsonKey(name: 'daily_calories')
  final int? dailyCalories;
  final String plan;
  @JsonKey(defaultValue: {})
  final Map<String, dynamic> preferences;

  const User({
    required this.id,
    required this.email,
    required this.name,
    this.avatarUrl,
    this.heightCm,
    this.weightKg,
    this.dateOfBirth,
    this.gender,
    this.activity,
    this.goal,
    this.dailyCalories,
    required this.plan,
    this.preferences = const {},
  });

  factory User.fromJson(Map<String, dynamic> json) => _$UserFromJson(json);
  Map<String, dynamic> toJson() => _$UserToJson(this);

  int? get age {
    if (dateOfBirth == null) return null;
    final dob = DateTime.tryParse(dateOfBirth!);
    if (dob == null) return null;
    final now = DateTime.now();
    int years = now.year - dob.year;
    if (now.month < dob.month ||
        (now.month == dob.month && now.day < dob.day)) {
      years--;
    }
    return years;
  }

  bool get hasCompletedOnboarding =>
      heightCm != null && weightKg != null && dateOfBirth != null &&
      gender != null && goal != null && activity != null;

  /// Returns the user's configured meal type IDs from preferences,
  /// falling back to the default set if not yet configured.
  List<String> get mealTypes {
    final value = preferences['meal_types'];
    if (value is List && value.isNotEmpty) return List<String>.from(value);
    return List<String>.from(kDefaultMealTypeIds);
  }
}