<?php
require_once __DIR__ . '/db/config.php';

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

$response = ['success' => false, 'message' => 'An unexpected error occurred.'];

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $satisfaction = filter_input(INPUT_POST, 'satisfaction', FILTER_SANITIZE_STRING);
    $comments = filter_input(INPUT_POST, 'comments', FILTER_SANITIZE_STRING);
    $how_heard = filter_input(INPUT_POST, 'how_heard', FILTER_SANITIZE_STRING);

    if (empty($satisfaction)) {
        $response['message'] = 'Satisfaction level is a required field.';
        echo json_encode($response);
        exit;
    }

    try {
        $pdo = db();
        $sql = "INSERT INTO survey_responses (satisfaction, comments, how_heard) VALUES (:satisfaction, :comments, :how_heard)";
        $stmt = $pdo->prepare($sql);
        
        $stmt->bindParam(':satisfaction', $satisfaction);
        $stmt->bindParam(':comments', $comments);
        $stmt->bindParam(':how_heard', $how_heard);
        
        if ($stmt->execute()) {
            $response['success'] = true;
            $response['message'] = 'Thank you! Your feedback has been submitted successfully.';
        } else {
            $response['message'] = 'Failed to save your response. Please try again.';
        }

    } catch (PDOException $e) {
        // In a real app, you'd log this error. For now, send a generic message.
        // error_log('PDOException: ' . $e->getMessage());
        $response['message'] = 'Database error: Could not save your response.';
    }

} else {
    $response['message'] = 'Invalid request method.';
}

echo json_encode($response);