// Author: fruit.com.cn

import 'package:flutter/foundation.dart';

import '../../core/data/models/account_profile.dart';
import '../../core/data/remote/api_client.dart';
import '../../core/data/repositories/account_repository.dart';

/// 个人资料页状态与保存动作。
class AccountProfileLogic extends ChangeNotifier {
  AccountProfileLogic(this._repository, {required this.onProfileUpdated});

  static const maxNicknameLength = 30;

  final AccountRepository _repository;
  final Future<void> Function(AccountProfile profile) onProfileUpdated;

  AccountProfile? profile;
  bool loading = false;
  bool saving = false;
  String? error;
  String? fieldError;
  bool _disposed = false;

  /// 进入页面时加载当前资料。
  Future<void> load() async {
    loading = true;
    error = null;
    _notify();
    try {
      profile = await _repository.profile();
    } catch (failure) {
      error = _message(failure);
    } finally {
      loading = false;
      _notify();
    }
  }

  /// 只提交本次改动；成功后同步登录态摘要。
  Future<bool> save({
    required String nickname,
    required String gender,
    String? birthday,
  }) async {
    final current = profile;
    if (current == null) return false;
    final trimmed = nickname.trim();
    if (trimmed.isEmpty || trimmed.length > maxNicknameLength) {
      fieldError = 'accountNicknameInvalid';
      _notify();
      return false;
    }
    final update = AccountProfileUpdate(
      nickname: trimmed == current.nickname ? null : trimmed,
      gender: gender.isEmpty || gender == current.gender ? null : gender,
      birthday: birthday == null || birthday.isEmpty ? null : birthday,
    );
    if (update.toJson().isEmpty) return true;

    saving = true;
    error = null;
    fieldError = null;
    _notify();
    try {
      final next = await _repository.updateProfile(update);
      profile = next;
      await onProfileUpdated(next);
      return true;
    } catch (failure) {
      error = _message(failure);
      return false;
    } finally {
      saving = false;
      _notify();
    }
  }

  String _message(Object failure) =>
      failure is ApiException ? failure.message : 'networkError';

  void _notify() {
    if (!_disposed) notifyListeners();
  }

  @override
  void dispose() {
    _disposed = true;
    super.dispose();
  }
}