<?php
// callback_ai_response.php
// Endpoint для приема ответов от n8n

header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: POST, OPTIONS');
header('Access-Control-Allow-Headers: Content-Type');

if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
    http_response_code(200);
    exit();
}

error_reporting(E_ALL);
ini_set('display_errors', 1);

try {
    // Подключаемся к БД
    include_once('config.inc.php');
    
    $conn = new mysqli($dbconfig['db_server'], $dbconfig['db_username'], $dbconfig['db_password'], $dbconfig['db_name']);
    
    if ($conn->connect_error) {
        throw new Exception("DB connection failed: " . $conn->connect_error);
    }
    
    $conn->set_charset('utf8mb4');
    
    // Получаем данные от n8n
    $input = json_decode(file_get_contents('php://input'), true);
    
    if (!$input) {
        throw new Exception('Invalid JSON input');
    }
    
    $taskId = $input['taskId'] ?? null;
    $response = $input['response'] ?? null;
    $status = $input['status'] ?? 'completed';
    $error = $input['error'] ?? null;
    
    if (!$taskId) {
        throw new Exception('Missing taskId');
    }
    
    error_log("Callback: Received response for task {$taskId}, status: {$status}");
    
    // Обновляем запись в БД
    if ($status === 'error') {
        $stmt = $conn->prepare("UPDATE ai_responses SET status = 'error', error_message = ?, updated_at = NOW() WHERE task_id = ?");
        $stmt->bind_param('ss', $error, $taskId);
    } else {
        $stmt = $conn->prepare("UPDATE ai_responses SET status = 'completed', response_data = ?, updated_at = NOW() WHERE task_id = ?");
        $stmt->bind_param('ss', $response, $taskId);
    }
    
    if (!$stmt->execute()) {
        throw new Exception("Failed to update task: " . $stmt->error);
    }
    
    $affected = $stmt->affected_rows;
    $stmt->close();
    $conn->close();
    
    error_log("Callback: Updated task {$taskId}, affected rows: {$affected}");
    
    echo json_encode([
        'success' => true,
        'message' => 'Response received',
        'taskId' => $taskId,
        'affected' => $affected
    ]);
    
} catch (Exception $e) {
    error_log("Callback Error: " . $e->getMessage());
    
    http_response_code(500);
    echo json_encode([
        'success' => false,
        'error' => $e->getMessage()
    ]);
}
?>