WIP

BudgetApp/Components/Pages/Settings.razor

@@ -7,11 +7,15 @@
 @inject AuthenticationStateProvider AuthStateProvider
 @inject ApplicationDbContext DbContext
 @inject NavigationManager Navigation
+@inject AppState AppState
 @rendermode InteractiveServer
 
 <PageTitle>Settings</PageTitle>
 
-<h3 class="mb-4">Settings</h3>
+<h3 class="mb-4">
+    Settings
+    <span class="badge bg-warning text-dark ms-2" style="font-size: 0.4em; vertical-align: middle;">beta</span>
+</h3>
 
 @* ── Change Password ── *@
 <div class="card mb-4">
@@ -52,6 +56,49 @@
     </div>
 </div>
 
+@* ── Reset Data ── *@
+<div class="card mb-4 border-warning">
+    <div class="card-header bg-warning">
+        <h5 class="mb-0">Reset Data</h5>
+    </div>
+    <div class="card-body">
+        <p class="fw-semibold">
+            This will permanently delete all your accounts, transactions and categories, giving you a clean slate. Your user account and password will be kept.
+        </p>
+
+        @if (resetSuccess)
+        {
+            <div class="alert alert-success">All data has been reset successfully.</div>
+        }
+
+        @if (!string.IsNullOrEmpty(resetError))
+        {
+            <div class="alert alert-danger">@resetError</div>
+        }
+
+        @if (!confirmingReset)
+        {
+            <button class="btn btn-outline-warning" @onclick="() => confirmingReset = true">
+                Reset All Data
+            </button>
+        }
+        else
+        {
+            <div class="alert alert-warning">
+                <strong>Are you sure?</strong> This cannot be undone. Type <code>I UNDERSTAND</code> and enter your password to confirm.
+            </div>
+            <div class="mb-3" style="max-width: 400px;">
+                <input type="text" class="form-control mb-2" placeholder="Type I UNDERSTAND to confirm" @bind="resetConfirmation" />
+                <input type="password" class="form-control mb-2" placeholder="Enter your password" @bind="resetPassword" />
+                <div class="d-flex gap-2">
+                    <button class="btn btn-warning" @onclick="ResetData">Confirm Reset</button>
+                    <button class="btn btn-secondary" @onclick="CancelReset">Cancel</button>
+                </div>
+            </div>
+        }
+    </div>
+</div>
+
 @* ── Delete Account ── *@
 <div class="card border-danger">
     <div class="card-header bg-danger text-white">
@@ -88,6 +135,9 @@
 </div>
 
 @code {
+    private static readonly string appVersion =
+        typeof(Program).Assembly.GetName().Version?.ToString(3) ?? "0.0.0";
+
     private ChangePasswordForm passwordForm = new();
     private bool passwordSuccess;
     private string? passwordError;
@@ -96,6 +146,12 @@
     private string deletePassword = string.Empty;
     private string? deleteError;
 
+    private bool confirmingReset;
+    private string resetConfirmation = string.Empty;
+    private string resetPassword = string.Empty;
+    private string? resetError;
+    private bool resetSuccess;
+
     private async Task ChangePassword()
     {
         passwordSuccess = false;
@@ -166,6 +222,59 @@
         deleteError = null;
     }
 
+    private async Task ResetData()
+    {
+        resetError = null;
+        resetSuccess = false;
+
+        var authState = await AuthStateProvider.GetAuthenticationStateAsync();
+        var userIdClaim = authState.User.FindFirst(System.Security.Claims.ClaimTypes.NameIdentifier)?.Value;
+        if (userIdClaim is null) return;
+
+        var user = await UserManager.FindByIdAsync(userIdClaim);
+        if (user is null) return;
+
+        if (!string.Equals(resetConfirmation?.Trim(), "I UNDERSTAND", StringComparison.Ordinal))
+        {
+            resetError = "Please type 'I UNDERSTAND' exactly to confirm.";
+            return;
+        }
+
+        var passwordValid = await UserManager.CheckPasswordAsync(user, resetPassword);
+        if (!passwordValid)
+        {
+            resetError = "Incorrect password.";
+            return;
+        }
+
+        await DbContext.Transactions
+            .Where(t => t.Account.UserId == userIdClaim)
+            .ExecuteDeleteAsync();
+
+        await DbContext.Accounts
+            .Where(a => a.UserId == userIdClaim)
+            .ExecuteDeleteAsync();
+
+        await DbContext.Categories
+            .Where(c => c.UserId == userIdClaim)
+            .ExecuteDeleteAsync();
+
+        confirmingReset = false;
+        resetConfirmation = string.Empty;
+        resetPassword = string.Empty;
+        resetSuccess = true;
+
+        AppState.NotifyAccountsChanged();
+    }
+
+    private void CancelReset()
+    {
+        confirmingReset = false;
+        resetConfirmation = string.Empty;
+        resetPassword = string.Empty;
+        resetError = null;
+    }
+
     private sealed class ChangePasswordForm
     {
         [System.ComponentModel.DataAnnotations.Required(ErrorMessage = "Current password is required")]