Guilhermes

GuilhermesApp/Pages/LoginPage.xaml.cs

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+using GuilhermesApp.Helpers;
+
+namespace GuilhermesApp.Pages;
+
+public partial class LoginPage : ContentPage
+{
+    private FirebaseService _firebaseService = new FirebaseService();
+
+    public LoginPage()
+    {
+        InitializeComponent();
+    }
+
+    private async void OnLoginClicked(object sender, EventArgs e)
+    {
+        if (string.IsNullOrWhiteSpace(EmailEntry.Text) || string.IsNullOrWhiteSpace(PasswordEntry.Text))
+        {
+            await DisplayAlert("Erro", "Preenche o email e a password.", "OK");
+            return;
+        }
+
+        try
+        {
+            // Tenta fazer o login no Firebase
+            var user = await _firebaseService.AuthClient.SignInWithEmailAndPasswordAsync(EmailEntry.Text, PasswordEntry.Text);
+            
+            // Se correr bem, vai para a página de Perfil
+            // O "//" define a HomePage como a nova raiz e impede de voltar atrás
+            await Shell.Current.GoToAsync("//MainTabs");
+        }
+        catch (Exception)
+        {
+            await DisplayAlert("Erro", "Login falhou. Verifica as credenciais.", "OK");
+        }
+    }
+
+    private async void OnRegisterClicked(object sender, EventArgs e)
+    {
+        // Vai para a página de registo
+        await Shell.Current.GoToAsync(nameof(RegisterPage));
+    }
+}