import 'package:flutter/material.dart';

import 'package:pshared/provider/account.dart';

import 'package:pweb/models/edit_state.dart';


class AccountNameState extends ChangeNotifier {
  AccountNameState({
    required this.initialName,
    required this.errorMessage,
    required AccountProvider accountProvider,
  }) : _accountProvider = accountProvider {
    _controller = TextEditingController(text: initialName);
  }

  final AccountProvider _accountProvider;
  final String initialName;
  final String errorMessage;

  late final TextEditingController _controller;
  EditState _editState = EditState.view;
  String _errorText = '';
  bool _disposed = false;

  TextEditingController get controller => _controller;
  EditState get editState => _editState;
  String get errorText => _errorText;
  bool get isEditing => _editState != EditState.view;
  bool get isSaving => _editState == EditState.saving;
  bool get isBusy => _accountProvider.isLoading || isSaving;
  String get currentName => _accountProvider.account?.name ?? initialName;

  void startEditing() => _setState(EditState.edit);

  void cancelEditing() {
    _controller.text = currentName;
    _setError('');
    _setState(EditState.view);
  }

  void syncName(String latestName) {
    if (isEditing) return;
    if (_controller.text != latestName) {
      _controller.text = latestName;
    }
  }

  Future<bool> save() async {
    final newName = _controller.text.trim();
    final current = currentName;

    if (newName.isEmpty || newName == current) {
      cancelEditing();
      return false;
    }

    _setError('');
    _setState(EditState.saving);

    try {
      await _accountProvider.resetUsername(newName);
      _setState(EditState.view);
      return true;
    } catch (_) {
      _setError(errorMessage);
      _setState(EditState.edit);
      return false;
    } finally {
      if (_editState == EditState.saving) {
        _setState(EditState.edit);
      }
    }
  }

  void _setState(EditState value) {
    if (_disposed || _editState == value) return;
    _editState = value;
    notifyListeners();
  }

  void _setError(String value) {
    if (_disposed) return;
    _errorText = value;
    notifyListeners();
  }

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