<?php
require_once '../init.php';
requireLogin();

header('Content-Type: application/json');

$action = $_POST['action'] ?? $_GET['action'] ?? '';

try {
    switch ($action) {
        case 'add':
            $name = trim($_POST['name'] ?? '');
            $url = trim($_POST['url'] ?? '');
            $display_order = (int)($_POST['display_order'] ?? 0);
            $status = $_POST['status'] ?? 'normal';
            $logo_url = trim($_POST['logo_url'] ?? '');
            
            if (!$name || !$url) {
                throw new Exception("ชื่อและลิงค์เว็บไซต์เป็นข้อมูลจำเป็น");
            }
            
            $stmt = $pdo->prepare("INSERT INTO websites (name, url, status, logo_url, display_order) VALUES (?, ?, ?, ?, ?)");
            $stmt->execute([$name, $url, $status, $logo_url, $display_order]);
            
            logAction($pdo, 'Add Website', "Added website: $name ($url)");
            echo json_encode(['success' => true]);
            break;
            
        case 'edit':
            $id = (int)($_POST['id'] ?? 0);
            $name = trim($_POST['name'] ?? '');
            $url = trim($_POST['url'] ?? '');
            $display_order = (int)($_POST['display_order'] ?? 0);
            $status = $_POST['status'] ?? 'normal';
            $logo_url = trim($_POST['logo_url'] ?? '');
            
            if (!$id || !$name || !$url) {
                throw new Exception("ข้อมูลไม่ครบถ้วน");
            }
            
            $stmt = $pdo->prepare("UPDATE websites SET name = ?, url = ?, status = ?, logo_url = ?, display_order = ? WHERE id = ?");
            $stmt->execute([$name, $url, $status, $logo_url, $display_order, $id]);
            
            logAction($pdo, 'Edit Website', "Edited website ID $id to: $name");
            echo json_encode(['success' => true]);
            break;
            
        case 'delete':
            $id = (int)($_POST['id'] ?? 0);
            if (!$id) throw new Exception("ไม่พบ ID");
            
            $stmt = $pdo->prepare("SELECT name FROM websites WHERE id = ?");
            $stmt->execute([$id]);
            $web = $stmt->fetch();
            
            if ($web) {
                $stmt = $pdo->prepare("DELETE FROM websites WHERE id = ?");
                $stmt->execute([$id]);
                logAction($pdo, 'Delete Website', "Deleted website: {$web['name']}");
            }
            
            echo json_encode(['success' => true]);
            break;
            
        case 'reset_clicks':
            $id = (int)($_POST['id'] ?? 0);
            if (!$id) throw new Exception("ไม่พบ ID");
            
            $stmt = $pdo->prepare("SELECT name FROM websites WHERE id = ?");
            $stmt->execute([$id]);
            $web = $stmt->fetch();
            
            if ($web) {
                $stmt = $pdo->prepare("UPDATE websites SET click_count = 0 WHERE id = ?");
                $stmt->execute([$id]);
                logAction($pdo, 'Reset Clicks', "Reset click count for website: {$web['name']}");
            }
            
            echo json_encode(['success' => true]);
            break;
            
        case 'save_settings':
            $site_name = trim($_POST['site_name'] ?? '');
            $site_subtitle = trim($_POST['site_subtitle'] ?? '');
            
            if (!$site_name) throw new Exception("ชื่อระบบเป็นข้อมูลจำเป็น");
            
            $stmt = $pdo->prepare("INSERT INTO settings (setting_key, setting_value) VALUES (?, ?) ON DUPLICATE KEY UPDATE setting_value = VALUES(setting_value)");
            $stmt->execute(['site_name', $site_name]);
            $stmt->execute(['site_subtitle', $site_subtitle]);
            
            logAction($pdo, 'Update Settings', "Updated site settings");
            echo json_encode(['success' => true]);
            break;
            
        default:
            throw new Exception("Invalid action");
    }
} catch (Exception $e) {
    echo json_encode(['success' => false, 'message' => $e->getMessage()]);
}