<?php
/*
Plugin Name: File upload per product and send in order email
Description: Adds a tab to upload a file in the product data and sends it as an attachment for "processing" orders, and adds a download link in the confirmation email.
Version: 1.0
Author: <a href="https://josselynjayant.fr">Josselyn jayant</a> & <a href="https://wycan.fr">WYCAN</a>
*/

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly.
}

// Ajouter l'onglet
add_filter('woocommerce_product_data_tabs', 'add_upload_file_tab', 50, 1);
function add_upload_file_tab($tabs) {
    $tabs['upload_file'] = array(
        'label' => __('Téléverser un fichier', 'woocommerce'),
        'target' => 'upload_file_options',
        'class'  => array(),
    );
    return $tabs;
}

// Ajouter le contenu de l'onglet
add_action('woocommerce_product_data_panels', 'upload_file_tab_content');
function upload_file_tab_content() {
    global $post;
    $file_url = get_post_meta($post->ID, '_uploaded_file', true);
    ?>
    <div id='upload_file_options' class='panel woocommerce_options_panel'>
        <div class='options_group'>
            <p class="form-field _uploaded_file_field">
                <label for="_uploaded_file_url"><?php _e('Fichier associé', 'woocommerce'); ?></label>
                <input type="text" class="short" style="width:70%;" name="_uploaded_file_url" id="_uploaded_file_url" value="<?php echo esc_url($file_url); ?>" readonly />
                <button id="upload_file_button" class="button"><?php _e('Ouvrir la galerie', 'woocommerce'); ?></button>
                <button id="delete_file_button" class="button"><?php _e('Supprimer', 'woocommerce'); ?></button>
            </p>
        </div>
    </div>
    <script type="text/javascript">
        jQuery(document).ready(function($){
            var custom_uploader;

            $('#upload_file_button').click(function(e) {
                e.preventDefault();

                if (custom_uploader) {
                    custom_uploader.open();
                    return;
                }

                custom_uploader = wp.media.frames.file_frame = wp.media({
                    title: 'Sélectionner un fichier',
                    button: {
                        text: 'Sélectionner ce fichier'
                    },
                    multiple: false
                });

                custom_uploader.on('select', function() {
                    attachment = custom_uploader.state().get('selection').first().toJSON();
                    $('#_uploaded_file_url').val(attachment.url);
                });

                custom_uploader.open();
            });

            $('#delete_file_button').click(function(e) {
                e.preventDefault();
                $('#_uploaded_file_url').val('');
            });
        });
    </script>
    <?php
}

// Sauvegarder le fichier quand le produit est sauvegardé.
add_action('woocommerce_process_product_meta', 'save_uploaded_file_url');
function save_uploaded_file_url($post_id) {
    if(isset($_POST['_uploaded_file_url'])) {
        update_post_meta($post_id, '_uploaded_file', esc_url($_POST['_uploaded_file_url']));
    }
}

// Ajouter le fichier en pièce jointe à l'e-mail "processing"
add_filter('woocommerce_email_attachments', 'attach_file_to_processing_email', 10, 3);
function attach_file_to_processing_email($attachments, $email_id, $order) {
    if ($email_id === 'customer_processing_order') {
        $items = $order->get_items();

        foreach ($items as $item) {
            $product_id = $item->get_product_id();
            $file_url = get_post_meta($product_id, '_uploaded_file', true);

            if ($file_url) {
                $file_path = get_attached_file(get_attachment_id_by_url($file_url));
                if ($file_path) {
                    $attachments[] = $file_path;
                }
            }
        }
    }
    return $attachments;
}

// Ajouter le lien de téléchargement dans l'e-mail de confirmation
add_action('woocommerce_email_after_order_table', 'add_file_link_to_order_email', 10, 4);
function add_file_link_to_order_email($order, $sent_to_admin, $plain_text, $email) {
    if ($email->id == 'customer_processing_order') {
        $items = $order->get_items();

        foreach ($items as $item) {
            $product_id = $item->get_product_id();
            $file_url = get_post_meta($product_id, '_uploaded_file', true);

            if ($file_url) {
                echo "<h2>Fichier lié à votre produit : " . $item->get_name() . "</h2>";
                if ($plain_text) {
                    echo "Télécharger: " . $file_url . "\n";
                } else {
                    echo "<a href='" . esc_url($file_url) . "'>Télécharger</a><br>";
                }
            }
        }
    }
}

// Fonction pour récupérer l'ID d'une pièce jointe depuis son URL
function get_attachment_id_by_url($url) {
    $id = attachment_url_to_postid($url);
    if ($id) {
        return $id;
    }
    return false;
}

// Ajouter l'icône "dashicons-upload"
function custom_admin_style() {
    echo '<style>
        #woocommerce-product-data ul.wc-tabs li.upload_file_options a:before {
            font-family: "dashicons";
            content: "\f317";
        }
    </style>';
}
add_action('admin_head', 'custom_admin_style');