Seekers/Views/RegistrationPage.xaml.cs

using Justice.Helpers;
using Justice.Models;
using Org.BouncyCastle.Crypto.Generators;
using System;

namespace Justice.Views
{
    public partial class RegistrationPage : ContentPage
    {
        private readonly DatabaseHelper _dbHelper;

        public RegistrationPage()
        {
            InitializeComponent();
            _dbHelper = new DatabaseHelper();
            RolePicker.SelectedIndexChanged += (s, e) =>
            {
                AuthorityTypeEntry.IsVisible = RolePicker.SelectedItem?.ToString() == "AuthorityUser";
            };
        }

        private async void OnRegisterClicked(object sender, EventArgs e)
        {
            if (string.IsNullOrWhiteSpace(UsernameEntry.Text) || string.IsNullOrWhiteSpace(PasswordEntry.Text) || RolePicker.SelectedItem == null)
            {
                await DisplayAlert("Error", "All fields are required.", "OK");
                return;
            }

            var hashedPassword = BCrypt.Net.BCrypt.HashPassword(PasswordEntry.Text.Trim());
            var user = new User
            {
                Username = UsernameEntry.Text.Trim(),
                Password = hashedPassword,
                Role = RolePicker.SelectedItem.ToString(),
                AuthorityType = AuthorityTypeEntry.IsVisible ? AuthorityTypeEntry.Text.Trim() : null
            };

            try
            {
                await _dbHelper.InitializeAsync<User>();
                await _dbHelper.InsertAsync(user);

                await DisplayAlert("Success", "User registered successfully.", "OK");
                await Navigation.PopAsync();
            }
            catch (Exception ex)
            {
                await DisplayAlert("Error", $"Failed to register: {ex.Message}", "OK");
            }
        }
    }
}