import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:firebase_auth/firebase_auth.dart';
import '../services/auth_service.dart';
import '../models/user_model.dart';

// Auth service provider
final authServiceProvider = Provider<AuthService>((ref) => AuthService());

// Auth state provider - lytter til Firebase Auth state changes
final authStateProvider = StreamProvider<User?>((ref) {
  final authService = ref.watch(authServiceProvider);
  return authService.authStateChanges;
});

// Current user provider
final currentUserProvider = Provider<User?>((ref) {
  final authState = ref.watch(authStateProvider);
  return authState.when(
    data: (user) => user,
    loading: () => null,
    error: (_, __) => null,
  );
});

// User data provider - henter brukerdata fra Firestore
final userDataProvider = StreamProvider<UserModel?>((ref) {
  final user = ref.watch(currentUserProvider);
  if (user == null) {
    return Stream.value(null);
  }
  final authService = ref.watch(authServiceProvider);
  return authService.userDataStream(user.uid);
});

// Login provider
final loginProvider = Provider<Future<UserCredential> Function({
  required String email,
  required String password,
})>((ref) {
  final authService = ref.watch(authServiceProvider);
  return ({required String email, required String password}) {
    return authService.signInWithEmail(email: email, password: password);
  };
});

// Sign up provider
final signUpProvider = Provider<Future<UserCredential> Function({
  required String email,
  required String password,
  required String displayName,
  required String organizationId,
  String? departmentId,
})>((ref) {
  final authService = ref.watch(authServiceProvider);
  return ({
    required String email,
    required String password,
    required String displayName,
    required String organizationId,
    String? departmentId,
  }) {
    return authService.signUpWithEmail(
      email: email,
      password: password,
      displayName: displayName,
      organizationId: organizationId,
      departmentId: departmentId,
    );
  };
});

// Sign out provider
final signOutProvider = Provider<Future<void> Function()>((ref) {
  final authService = ref.watch(authServiceProvider);
  return () => authService.signOut();
});

// Reset password provider
final resetPasswordProvider = Provider<Future<void> Function(String)>((ref) {
  final authService = ref.watch(authServiceProvider);
  return (String email) => authService.resetPassword(email);
});