// ============================================
// DIRECT PHP TEST - NO AJAX
// ============================================

add_action('init', 'nfs_direct_test_runner');

function nfs_direct_test_runner() {
    if (!current_user_can('manage_options')) {
        return;
    }
    
    if (!isset($_GET['nfs_direct_test']) || $_GET['nfs_direct_test'] !== '1') {
        return;
    }
    
    // Prevent WordPress from loading further
    nfs_run_direct_tests();
    exit;
}

function nfs_run_direct_tests() {
    header('Content-Type: text/plain; charset=utf-8');
    
    echo "========================================\n";
    echo " NAJIBUL FOLLOW SYSTEM - DIRECT TEST\n";
    echo "========================================\n";
    echo " Time: " . date('Y-m-d H:i:s') . "\n";
    echo " WordPress: " . get_bloginfo('version') . "\n";
    echo " PHP: " . PHP_VERSION . "\n";
    echo " Plugin Version: " . (defined('NAJIBUL_FOLLOW_VERSION') ? NAJIBUL_FOLLOW_VERSION : 'Not detected') . "\n";
    echo "========================================\n\n";
    
    // ============================================
    // TEST 1: Check if plugin is loaded
    // ============================================
    echo "TEST 1: Plugin Loading\n";
    echo "----------------------------------------\n";
    echo "NAJIBUL_FOLLOW_VERSION: " . (defined('NAJIBUL_FOLLOW_VERSION') ? NAJIBUL_FOLLOW_VERSION : '❌ NOT DEFINED') . "\n";
    echo "NAJIBUL_FOLLOW_PATH: " . (defined('NAJIBUL_FOLLOW_PATH') ? NAJIBUL_FOLLOW_PATH : '❌ NOT DEFINED') . "\n";
    echo "NAJIBUL_FOLLOW_MODULE_PATH: " . (defined('NAJIBUL_FOLLOW_MODULE_PATH') ? NAJIBUL_FOLLOW_MODULE_PATH : '❌ NOT DEFINED') . "\n";
    echo "\n";
    
    // ============================================
    // TEST 2: Check Follow_Core class
    // ============================================
    echo "TEST 2: Follow_Core Class\n";
    echo "----------------------------------------\n";
    
    $class_exists = class_exists('NajibulFollow\\Follow_Core');
    echo "class_exists('NajibulFollow\\\\Follow_Core'): " . ($class_exists ? '✅ YES' : '❌ NO') . "\n";
    
    if (!$class_exists) {
        // Try to find the file
        $possible_paths = [
            WP_PLUGIN_DIR . '/najibul-follow-system/author-follow-system/class-follow-core.php',
            WP_PLUGIN_DIR . '/najibul-follow-system/class-follow-core.php',
            WP_PLUGIN_DIR . '/najibul-follow/author-follow-system/class-follow-core.php',
            WP_CONTENT_DIR . '/plugins/najibul-follow-system/author-follow-system/class-follow-core.php',
        ];
        
        echo "Searching for class file...\n";
        foreach ($possible_paths as $path) {
            echo "  Checking: " . $path . " - " . (file_exists($path) ? '✅ EXISTS' : '❌ NOT FOUND') . "\n";
            if (file_exists($path)) {
                echo "  ✅ FILE FOUND: " . $path . "\n";
                require_once $path;
                $class_exists = class_exists('NajibulFollow\\Follow_Core');
                echo "  After require: " . ($class_exists ? '✅ CLASS LOADED' : '❌ CLASS NOT LOADED') . "\n";
                break;
            }
        }
    }
    
    echo "\n";
    
    // ============================================
    // TEST 3: Database Connection
    // ============================================
    echo "TEST 3: Database Connection\n";
    echo "----------------------------------------\n";
    global $wpdb;
    
    try {
        $connected = !$wpdb->db_connect_error();
        echo "Database Connected: " . ($connected ? '✅ YES' : '❌ NO') . "\n";
        echo "Database Version: " . $wpdb->db_version() . "\n";
        echo "Table Prefix: " . $wpdb->prefix . "\n";
    } catch (Exception $e) {
        echo "❌ Database Error: " . $e->getMessage() . "\n";
    }
    echo "\n";
    
    // ============================================
    // TEST 4: Check Tables
    // ============================================
    echo "TEST 4: Database Tables\n";
    echo "----------------------------------------\n";
    
    $tables = [
        'author_followers' => $wpdb->prefix . 'author_followers',
        'uafs_notification_queue' => $wpdb->prefix . 'uafs_notification_queue',
        'uafs_notifications' => $wpdb->prefix . 'uafs_notifications',
        'uafs_push_tokens' => $wpdb->prefix . 'uafs_push_tokens',
    ];
    
    foreach ($tables as $name => $table) {
        $exists = $wpdb->get_var("SHOW TABLES LIKE '$table'") === $table;
        $rows = $exists ? (int) $wpdb->get_var("SELECT COUNT(*) FROM $table") : 0;
        echo $name . ": " . ($exists ? '✅ EXISTS' : '❌ MISSING') . " (Rows: " . $rows . ")\n";
    }
    echo "\n";
    
    // ============================================
    // TEST 5: Follow Function (if class exists)
    // ============================================
    echo "TEST 5: Follow/Unfollow Function\n";
    echo "----------------------------------------\n";
    
    if ($class_exists) {
        try {
            $core = new NajibulFollow\Follow_Core();
            echo "✅ Follow_Core instantiated\n";
            
            // Get test users
            $users = get_users(['number' => 2]);
            if (count($users) >= 2) {
                $author_id = $users[0]->ID;
                $follower_id = $users[1]->ID;
                $language = 'en';
                
                echo "Author: " . $users[0]->display_name . " (ID: " . $author_id . ")\n";
                echo "Follower: " . $users[1]->display_name . " (ID: " . $follower_id . ")\n";
                
                // Check current status
                $status = $core->check_follow_status($author_id, $follower_id, $language);
                echo "Current Status: " . ($status ? 'Following' : 'Not following') . "\n";
                
                // Test Follow
                echo "\n--- Testing Follow ---\n";
                $follow_result = $core->follow_author($author_id, $follower_id, $language);
                echo "Follow Result: " . ($follow_result ? '✅ SUCCESS' : '❌ FAILED') . "\n";
                
                // Verify in database
                $verify = $wpdb->get_var($wpdb->prepare(
                    "SELECT COUNT(*) FROM {$wpdb->prefix}author_followers 
                     WHERE author_id = %d AND follower_id = %d AND language = %s AND status = 1",
                    $author_id, $follower_id, $language
                ));
                echo "Database Verify: " . ($verify > 0 ? '✅ Record found (' . $verify . ')' : '❌ No record found') . "\n";
                
                // Test Unfollow
                echo "\n--- Testing Unfollow ---\n";
                $unfollow_result = $core->unfollow_author($author_id, $follower_id, $language);
                echo "Unfollow Result: " . ($unfollow_result ? '✅ SUCCESS' : '❌ FAILED') . "\n";
                
                // Verify in database
                $verify_unfollow = $wpdb->get_var($wpdb->prepare(
                    "SELECT COUNT(*) FROM {$wpdb->prefix}author_followers 
                     WHERE author_id = %d AND follower_id = %d AND language = %s AND status = 0",
                    $author_id, $follower_id, $language
                ));
                echo "Database Verify: " . ($verify_unfollow > 0 ? '✅ Record found (' . $verify_unfollow . ')' : '⚠️ No record found (may be deleted)') . "\n";
                
                // Clear cache
                $core->clear_cache($author_id, $follower_id, $language);
                echo "Cache Cleared: ✅\n";
                
            } else {
                echo "⚠️ Need at least 2 users for follow test\n";
                echo "Current users: " . count($users) . "\n";
            }
        } catch (Exception $e) {
            echo "❌ Error: " . $e->getMessage() . "\n";
            echo "Trace: " . $e->getTraceAsString() . "\n";
        }
    } else {
        echo "❌ Cannot test follow - Follow_Core not available\n";
    }
    echo "\n";
    
    // ============================================
    // TEST 6: Guest Follow (if class exists)
    // ============================================
    echo "TEST 6: Guest Follow/Unfollow\n";
    echo "----------------------------------------\n";
    
    if ($class_exists) {
        try {
            $core = new NajibulFollow\Follow_Core();
            
            $fingerprint = 'test_guest_' . time() . '_' . wp_rand(10000, 99999);
            $users = get_users(['number' => 1]);
            $author_id = $users[0]->ID;
            $language = 'en';
            
            echo "Guest Fingerprint: " . $fingerprint . "\n";
            echo "Author: " . $users[0]->display_name . " (ID: " . $author_id . ")\n";
            
            // Test Guest Follow
            echo "\n--- Testing Guest Follow ---\n";
            $follow_result = $core->follow_author($author_id, 0, $language, $fingerprint);
            echo "Guest Follow Result: " . ($follow_result ? '✅ SUCCESS' : '❌ FAILED') . "\n";
            
            // Verify in database
            $verify = $wpdb->get_var($wpdb->prepare(
                "SELECT COUNT(*) FROM {$wpdb->prefix}author_followers 
                 WHERE fallback_fingerprint = %s AND author_id = %d AND status = 1",
                $fingerprint, $author_id
            ));
            echo "Database Verify: " . ($verify > 0 ? '✅ Record found (' . $verify . ')' : '❌ No record found') . "\n";
            
            // Test Guest Unfollow
            echo "\n--- Testing Guest Unfollow ---\n";
            $unfollow_result = $core->unfollow_author($author_id, 0, $language, $fingerprint);
            echo "Guest Unfollow Result: " . ($unfollow_result ? '✅ SUCCESS' : '❌ FAILED') . "\n";
            
            // Verify in database
            $verify_unfollow = $wpdb->get_var($wpdb->prepare(
                "SELECT COUNT(*) FROM {$wpdb->prefix}author_followers 
                 WHERE fallback_fingerprint = %s AND author_id = %d AND status = 0",
                $fingerprint, $author_id
            ));
            echo "Database Verify: " . ($verify_unfollow > 0 ? '✅ Record found (' . $verify_unfollow . ')' : '⚠️ No record found') . "\n";
            
            // Clear cache
            $core->clear_cache($author_id, 0, $language);
            echo "Cache Cleared: ✅\n";
            
        } catch (Exception $e) {
            echo "❌ Error: " . $e->getMessage() . "\n";
        }
    } else {
        echo "❌ Cannot test guest follow - Follow_Core not available\n";
    }
    echo "\n";
    
    // ============================================
    // TEST 7: File Permissions
    // ============================================
    echo "TEST 7: File Permissions\n";
    echo "----------------------------------------\n";
    
    $plugin_dir = WP_PLUGIN_DIR . '/najibul-follow-system/';
    echo "Plugin Directory: " . $plugin_dir . "\n";
    echo "Directory Exists: " . (is_dir($plugin_dir) ? '✅ YES' : '❌ NO') . "\n";
    
    if (is_dir($plugin_dir)) {
        $files = [
            'najibul-follow-system.php' => $plugin_dir . 'najibul-follow-system.php',
            'author-follow-system/class-follow-core.php' => $plugin_dir . 'author-follow-system/class-follow-core.php',
            'author-follow-system/class-ajax-rest-api.php' => $plugin_dir . 'author-follow-system/class-ajax-rest-api.php',
        ];
        
        foreach ($files as $name => $path) {
            $exists = file_exists($path);
            $readable = $exists ? is_readable($path) : false;
            echo $name . ": " . ($exists ? '✅ EXISTS' : '❌ MISSING') . 
                 ($exists ? ' (Readable: ' . ($readable ? '✅' : '❌') . ')' : '') . "\n";
        }
    }
    echo "\n";
    
    // ============================================
    // SUMMARY
    // ============================================
    echo "========================================\n";
    echo " SUMMARY\n";
    echo "========================================\n";
    
    $issues = [];
    
    if (!defined('NAJIBUL_FOLLOW_VERSION')) {
        $issues[] = "❌ Plugin not loaded (NAJIBUL_FOLLOW_VERSION not defined)";
    }
    
    if (!$class_exists) {
        $issues[] = "❌ Follow_Core class not found";
    }
    
    if ($class_exists && isset($follow_result) && !$follow_result) {
        $issues[] = "❌ Follow function failed";
    }
    
    if (empty($issues)) {
        echo "✅ ALL TESTS PASSED!\n";
        echo "System is working correctly.\n";
    } else {
        echo "❌ ISSUES FOUND:\n";
        foreach ($issues as $issue) {
            echo "  - " . $issue . "\n";
        }
    }
    
    echo "\n========================================\n";
    echo " END OF REPORT\n";
    echo "========================================\n";
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