// === WooCommerce kortingen toepassen op subsites met thema 'svmshop' ===
add_action('woocommerce_before_calculate_totals', function ($cart) {
    if (is_admin() || !is_multisite() || is_main_site() || did_action('woocommerce_before_calculate_totals') >= 2) return;

    $theme = wp_get_theme();
    if ($theme->get_stylesheet() !== 'svmshop') return;

    switch_to_blog(1);
    $rules = get_site_option('multistore_discounts_rules', []);
    restore_current_blog();

    $weekday = strtolower(date('l'));
    $today = date('Y-m-d');

    foreach ($cart->get_cart() as $cart_item_key => $item) {
        $product = $item['data'];
        $name = $product->get_name();
        $categories = wp_get_post_terms($product->get_id(), 'product_cat', ['fields' => 'slugs']);

        foreach ($rules as $rule) {
            if (!empty($rule['start_date']) && $today < $rule['start_date']) continue;
            if (!empty($rule['end_date']) && $today > $rule['end_date']) continue;
            if (!empty($rule['weekdays']) && is_array($rule['weekdays']) && !in_array($weekday, $rule['weekdays'])) continue;

            $match = false;
            if ($rule['type'] === 'product' && !empty($rule['target_product']) && strcasecmp($name, $rule['target_product']) === 0) {
                $match = true;
            } elseif ($rule['type'] === 'category' && !empty($rule['target_category']) && in_array($rule['target_category'], $categories)) {
                $match = true;
            }

            if (!$match || $rule['mode'] !== 'percentage') continue;

            $discount = floatval($rule['discount']);
            if ($discount > 0 && $discount < 100) {
                    wc_add_notice("✅ Korting van {$discount}% toegepast op: $name", 'success');
                $price = $product->get_price();
                $product->set_price($price * (1 - ($discount / 100)));
            }
        }
    }
}, 20, 1);

// === BOGO toepassen via negatieve fee ===
add_action('woocommerce_cart_calculate_fees', function ($cart) {
    if (is_admin() || !is_multisite() || is_main_site()) return;

    $theme = wp_get_theme();
    if ($theme->get_stylesheet() !== 'svmshop') return;

    switch_to_blog(1);
    $rules = get_site_option('multistore_discounts_rules', []);
    restore_current_blog();

    $weekday = strtolower(date('l'));
    $today = date('Y-m-d');

    foreach ($rules as $rule) {
        if ($rule['mode'] !== 'bogo') continue;
        if (!empty($rule['start_date']) && $today < $rule['start_date']) continue;
        if (!empty($rule['end_date']) && $today > $rule['end_date']) continue;
        if (!empty($rule['weekdays']) && is_array($rule['weekdays']) && !in_array($weekday, $rule['weekdays'])) continue;

        $buy = intval($rule['bogo_qty']);
        $free = intval($rule['bogo_free']);
        if ($buy <= 0 || $free <= 0) continue;

        foreach ($cart->get_cart() as $cart_item_key => $item) {
            $product = $item['data'];
            $name = $product->get_name();
            $categories = wp_get_post_terms($product->get_id(), 'product_cat', ['fields' => 'slugs']);

            $match = false;
            if ($rule['type'] === 'product' && !empty($rule['target_product']) && strcasecmp($name, $rule['target_product']) === 0) {
                $match = true;
            } elseif ($rule['type'] === 'category' && !empty($rule['target_category']) && in_array($rule['target_category'], $categories)) {
                $match = true;
            }

            if (!$match) continue;

            $quantity = $item['quantity'];
            $multiplier = floor($quantity / $buy);
            if ($multiplier < 1) continue;

            $free_product_name = $rule['free_product'] ?? '';
            $product_id = null;
            if (!empty($free_product_name)) {
                $post = get_page_by_title($free_product_name, OBJECT, 'product');
                if ($post) $product_id = $post->ID;
            } else {
                $product_id = $product->get_id();
            }

            if (!$product_id) continue;
            $gift_product = wc_get_product($product_id);
            if (!$gift_product) continue;

            $gift_price = $gift_product->get_price() * $free * $multiplier;
            $cart->add_fee(__('Gratis product (BOGO)', 'multistore-discounts'), -$gift_price);
        }
    }
}, 30);
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