import 'package:flutter/material.dart';

import '../../../shared/network/api_client.dart';
import '../../../shared/storage/session_store.dart';
import '../domain/auth_session.dart';

class AuthController {
  AuthController({ApiClient? apiClient}) : _apiClient = apiClient ?? const ApiClient();

  final ApiClient _apiClient;

  final ValueNotifier<bool> isLoading = ValueNotifier<bool>(false);
  final ValueNotifier<String?> errorMessage = ValueNotifier<String?>(null);

  Future<void> login({required String account, required String password}) async {
    isLoading.value = true;
    errorMessage.value = null;
    try {
      final session = await _apiClient.login(account: account, password: password);
      final currentUser = await _apiClient.fetchCurrentUser(session.accessToken);
      await SessionStore.save(_mergeSession(session, currentUser));
    } on ApiException catch (error) {
      errorMessage.value = error.message;
      rethrow;
    } catch (_) {
      errorMessage.value = '登录失败，请稍后重试';
      rethrow;
    } finally {
      isLoading.value = false;
    }
  }

  Future<void> logout() async {
    await SessionStore.clear();
    errorMessage.value = null;
  }

  AuthSession _mergeSession(AuthSession session, AuthSession currentUser) {
    return session.copyWith(
      userId: currentUser.userId,
      tenantId: currentUser.tenantId,
      username: currentUser.username,
      userDisplayName: currentUser.userDisplayName,
      role: currentUser.role,
      status: currentUser.status,
    );
  }
}