/**
 * ============================================================================
 * CRITICAL FIXES FOR SUBADMIN ACCESS - IMPLEMENTATION STATUS
 * ============================================================================
 * 
 * Date: February 13, 2026
 * Issue: Subadmins given permission but CANNOT ACCESS features (redirect to admin_login)
 * Status: PARTIALLY FIXED ✅ (See below)
 * 
 * ============================================================================
 * ROOT CAUSE ANALYSIS
 * ============================================================================
 * 
 * PROBLEM IDENTIFIED:
 * Admin pages had TWO conflicting auth checks:
 * 
 * 1. Permission enforcement (correct):
 *    EnforceManageSettings::guardPage();
 *    ↓ Delegates to
 *    AdminPageHeader::requirePage('manage_settings');
 *    ↓ PROBLEM: AdminPageHeader.php is EMPTY ❌
 * 
 * 2. Hardcoded admin-only check (incorrect):
 *    if (!isset($_SESSION['is_admin']) || $_SESSION['is_admin'] !== true) {
 *        header('Location: admin_login.php');
 *        exit;
 *    }
 *    ↓ Blocks ALL non-admins INCLUDING subadmins with valid permissions ❌
 * 
 * RESULT: Even with permissions, subadmins were blocked before permission 
 *         check could happen!
 * 
 * ============================================================================
 * SOLUTION APPLIED
 * ============================================================================
 * 
 * REPLACED hardcoded checks with proper permission enforcement using 
 * SubAdminPageGuard class (which DOES WORK ✅)
 * 
 * SubAdminPageGuard features:
 * ✓ Allows full admins through (no restrictions)
 * ✓ Allows subadmins IF they have 'view' permission for feature
 * ✓ Redirects to admin_login.php if not logged in at all
 * ✓ Redirects to subadmin_dashboard.php if subadmin lacks permission
 * ✓ Provides renderDeleteButton(), renderCreateButton(), renderEditButton()
 * ✓ Provides getCapabilities() for UI conditional rendering
 * 
 * ============================================================================
 * FILES FIXED SO FAR
 * ============================================================================
 * 
 * ✅ 1. admin_dashboard.php
 *    OLD: Hard-coded check blocked all non-admins
 *    NEW: SubAdminPageGuard::enforceView() allows subadmins with permission
 *    EFFECT: Subadmins can now access Logo, Marquee, etc. based on permissions
 * 
 * ✅ 2. admin_add_news.php
 *    OLD: Hard-coded check blocked all non-admins
 *    NEW: SubAdminPageGuard::enforceView() allows subadmins with permission
 *    EFFECT: Subadmins can now access News management based on permissions
 * 
 * ✅ 3. admin_manage_users.php
 *    OLD: Complex DB check that still blocked non-admins
 *    NEW: SubAdminPageGuard::enforceView() allows subadmins with permission
 *    EFFECT: Subadmins can now manage users based on permissions
 * 
 * ⏳ 4. admin_blogs.php - PENDING (file loading from FTP)
 * ⏳ 5. admin_products.php - PENDING (file loading from FTP)
 * ⏳ 6. admin_orders.php - PENDING (file load from FTP)
 * ⏳ 7. admin_edit_product.php - PENDING (file loading from FTP)
 * ⏳ 8. admin_edit_blog.php - PENDING (file loading from FTP)
 * ⏳ 9. Other admin_* pages - PENDING (will fix after testing)
 * 
 * NOTE: admin_subadmins.php INTENTIONALLY LEFT AS ADMIN-ONLY
 *       (Only full admins should manage other subadmins' permissions)
 * 
 * ============================================================================
 * WHAT YOU SHOULD TEST NOW
 * ============================================================================
 * 
 * Test with subadmin account (example: Zainab):
 * Permissions: Logo=Administrator, Slider Images=Editor, Categories=Viewer
 * 
 * ✅ SHOULD WORK NOW:
 *    1. Login to subadmin dashboard 
 *    2. Click on "Logo" card → Should go to admin_dashboard.php
 *    3. Click on "Slider Images" card → Should go to admin_dashboard.php
 *    4. Click on "Categories" card → Should go to admin_dashboard.php
 *    5. NO MORE REDIRECT TO admin_login.php!
 * 
 * FOR EACH FEATURE:
 *    ├─ Logo (ADMINISTRATOR): 
 *    │  └─ Can upload, change, delete → All buttons visible
 *    │
 *    ├─ Slider Images (EDITOR):
 *    │  ├─ Can view ✓
 *    │  ├─ Can add new ✓
 *    │  ├─ Can edit ✓
 *    │  └─ CANNOT delete ✗ (delete button should be HIDDEN or DISABLED)
 *    │
 *    └─ Categories (VIEWER):
 *       ├─ Can view ✓
 *       ├─ CANNOT add ✗ (add button should be HIDDEN)
 *       ├─ CANNOT edit ✗ (edit button should be HIDDEN)
 *       └─ CANNOT delete ✗ (delete button should be HIDDEN)
 * 
 * ⚠️ KNOWN ISSUE: Delete buttons might still be visible even for editors
 *    (This is Issue #2 - needs more work)
 * 
 * ============================================================================
 * ISSUE #2: DELETE BUTTON VISIBILITY (NOT YET COMPLETE)
 * ============================================================================
 * 
 * CURRENT STATE:
 * - SubAdminPageGuard HAS renderDeleteButton() method ✓
 * - But blog pages and product pages might not BE USING IT ✗
 * 
 * WHAT NEEDS TO HAPPEN:
 * 1. Find all delete button HTML patterns in admin pages
 * 2. Replace with: $pageGuard->renderDeleteButton($id)
 * 3. This will render: 
 *    - FOR VIEWERS: Disabled button (gray, clickable=false)
 *    - FOR EDITORS: Disabled button (gray, clickable=false)  
 *    - FOR ADMINS: Active delete button (red, functional)
 * 
 * BUTTON PATTERNS TO FIND:
 * <button ... onclick="deleteItem(...)"  →  $pageGuard->renderDeleteButton()
 * <a href="...delete..."                 →  Use guard::can('delete') check
 * 
 * EXAMPLE FIX:
 * 
 *   OLD (admin_blogs.php):
 *   ──────────────────────
 *   <button onclick="deleteItem(<?php echo $blog['id']; ?>)">Delete</button>
 * 
 *   NEW (admin_blogs.php):
 *   ──────────────────────
 *   <?php $pageGuard->renderDeleteButton($blog['id']); ?>
 * 
 * ============================================================================
 * ISSUE #1: MODAL/POPUP LOADING (NOT YET ANALYZED)
 * ============================================================================
 * 
 * USER REPORT: Logo change popup not opening for subadmin viewers
 * 
 * UNKNOWN: 
 * - How does admin_dashboard.php currently load modals?
 * - Are they HTML blocks or AJAX calls?
 * - Where are they loaded from?
 * 
 * NEXT STEPS:
 * 1. Inspect admin_dashboard.php HTML (search for modal/form elements)
 * 2. Check if modals are inline HTML or loaded via AJAX
 * 3. Implement permission checks accordingly:
 *    - IF inline: Wrap modal with <?php if($pageGuard->can('view')) ?>
 *    - IF AJAX: Ensure API endpoints call $pageGuard->enforceView()
 * 
 * ============================================================================
 * CODE PATTERNS FOR FIX #2 (DELETE BUTTON VISIBILITY)
 * ============================================================================
 * 
 * PATTERN 1: Delete button in table row
 * ────────────────────────────────────
 * FIND:  <button onclick="deleteProduct(<?php echo $product['id']; ?>)">Delete</button>
 * REPLACE: <?php $pageGuard->renderDeleteButton($product['id']); ?>
 * 
 * PATTERN 2: Delete link in table
 * ────────────────────────────────
 * FIND:  <a href="admin_products.php?action=delete&id=<?php echo $id; ?>">Delete</a>
 * REPLACE: 
 *   <?php if ($pageGuard->can('delete')): ?>
 *       <a href="admin_products.php?action=delete&id=<?php echo $id; ?>">Delete</a>
 *   <?php else: ?>
 *       <span style="color: #ccc; cursor: not-allowed;">Delete</span>
 *   <?php endif; ?>
 * 
 * PATTERN 3: Delete in modal form
 * ────────────────────────
 * FIND:  <button type="button" onclick="confirmDelete(<?php echo $id; ?>)">
 * REPLACE: <?php $pageGuard->renderDeleteButton($id, 'Are you sure?'); ?>
 * 
 * ============================================================================
 * VERIFICATION CHECKLIST
 * ============================================================================
 * 
 * After fixes are complete, verify:
 * 
 * [ ] Subadmin can navigate to allowed features
 * [ ] Subadmin sees permission-based UI:
 *     [ ] Viewers: See read-only interface
 *     [ ] Editors: See add/edit but NOT delete
 *     [ ] Administrators: See everything including delete
 * [ ] Logout redirects to admin_login.php (not website)
 * [ ] Back button goes to subadmin dashboard
 * [ ] Delete attempts by unauthorized users return 403
 * [ ] Modals/popups appear and load correctly
 * [ ] No existing admin functionality broken
 * 
 * ============================================================================
 * IMMEDIATE NEXT STEPS
 * ============================================================================
 * 
 * PRIORITY 1: Test login flow
 *   Command: Navigate to admin_login.php in browser
 *   Login: Use a subadmin account
 *   Expected: Dashboard shows cards with permission levels
 * 
 * PRIORITY 2: Test feature access
 *   Command: From dashboard, click on "Logo" or other feature
 *   Expected: Page loads (NOT redirect to admin_login.php)
 *   Verify: Buttons match permission level
 * 
 * PRIORITY 3: Find and fix delete buttons (if still visible for editors)
 *   Command: grep -n "deleteItem\|delete.*onclick" admin_*.php
 *   FOR EACH: Replace hardcoded button with $pageGuard->renderDeleteButton()
 * 
 * PRIORITY 4: Test delete blocking
 *   As subadmin editor: Try to manually delete via URL → Should get 403
 *   As subadmin viewer: Try to delete → Should get 403
 *   As admin: Delete should work normally
 * 
 * PRIORITY 5: Investigate modals
 *   Open admin_dashboard.php source
 *   Search for modal/popup HTML elements
 *   Trace how they load and add permission checks
 * 
 * ============================================================================
 */
?>
