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

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $restaurant_id = $_POST['restaurant_id'] ?? null;
    $new_rating = $_POST['rating'] ?? null;

    if ($restaurant_id && $new_rating) {
        try {
            $pdo = db();

            // Get current rating and count
            $stmt = $pdo->prepare("SELECT rating, rating_count FROM restaurants WHERE id = ?");
            $stmt->execute([$restaurant_id]);
            $restaurant = $stmt->fetch(PDO::FETCH_ASSOC);

            if ($restaurant) {
                $current_total_rating = $restaurant['rating'] * $restaurant['rating_count'];
                $new_total_rating = $current_total_rating + $new_rating;
                $new_rating_count = $restaurant['rating_count'] + 1;
                $new_average_rating = $new_total_rating / $new_rating_count;

                // Update restaurant with new rating
                $update_stmt = $pdo->prepare("UPDATE restaurants SET rating = ?, rating_count = ? WHERE id = ?");
                $update_stmt->execute([$new_average_rating, $new_rating_count, $restaurant_id]);
            }
        } catch (PDOException $e) {
            // Log error, but don't show to user
            error_log("Rating update failed: " . $e->getMessage());
        }
    }
}

// Redirect back to the menu page
header('Location: menu.php?id=' . $restaurant_id);
exit;
?>