<?php
/* Copyright (C) 2026 ZUGFeRD Import Module
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 */

/**
 * \file    datanorm_update.php
 * \ingroup importzugferd
 * \brief   Mass update products from Datanorm catalogs
 */

// Load Dolibarr environment
$res = 0;
if (!$res && !empty($_SERVER["CONTEXT_DOCUMENT_ROOT"])) {
    $res = @include $_SERVER["CONTEXT_DOCUMENT_ROOT"]."/main.inc.php";
}
$tmp = empty($_SERVER['SCRIPT_FILENAME']) ? '' : $_SERVER['SCRIPT_FILENAME'];
$tmp2 = realpath(__FILE__);
$i = strlen($tmp) - 1;
$j = strlen($tmp2) - 1;
while ($i > 0 && $j > 0 && isset($tmp[$i]) && isset($tmp2[$j]) && $tmp[$i] == $tmp2[$j]) {
    $i--;
    $j--;
}
if (!$res && $i > 0 && file_exists(substr($tmp, 0, ($i + 1))."/main.inc.php")) {
    $res = @include substr($tmp, 0, ($i + 1))."/main.inc.php";
}
if (!$res && $i > 0 && file_exists(dirname(substr($tmp, 0, ($i + 1)))."/main.inc.php")) {
    $res = @include dirname(substr($tmp, 0, ($i + 1)))."/main.inc.php";
}
if (!$res && file_exists("../main.inc.php")) {
    $res = @include "../main.inc.php";
}
if (!$res && file_exists("../../main.inc.php")) {
    $res = @include "../../main.inc.php";
}
if (!$res && file_exists("../../../main.inc.php")) {
    $res = @include "../../../main.inc.php";
}
if (!$res) {
    die("Include of main fails");
}

require_once DOL_DOCUMENT_ROOT.'/core/lib/admin.lib.php';
require_once DOL_DOCUMENT_ROOT.'/core/class/html.formcompany.class.php';
require_once DOL_DOCUMENT_ROOT.'/product/class/product.class.php';
require_once DOL_DOCUMENT_ROOT.'/fourn/class/fournisseur.product.class.php';
dol_include_once('/importzugferd/class/datanorm.class.php');
dol_include_once('/importzugferd/lib/importzugferd.lib.php');

// Load translations
$langs->loadLangs(array("importzugferd@importzugferd", "products", "bills"));

// Security check
if (!$user->hasRight('produit', 'creer')) {
    accessforbidden();
}

// Get parameters
$action = GETPOST('action', 'aZ09');
$fk_soc = GETPOSTINT('fk_soc');
$search_mode = GETPOST('search_mode', 'alpha') ?: 'supplier'; // supplier, manual
$search_term = GETPOST('search_term', 'alphanohtml');
$search_by_name = GETPOSTINT('search_by_name');
$search_by_ean = GETPOSTINT('search_by_ean');
$search_by_ref = GETPOSTINT('search_by_ref');

// Filters for what to update
$filter_price = GETPOSTISSET('filter_price') ? GETPOSTINT('filter_price') : 1;
$filter_description = GETPOSTISSET('filter_description') ? GETPOSTINT('filter_description') : 1;
$filter_label = GETPOSTISSET('filter_label') ? GETPOSTINT('filter_label') : 0;

// Only show differences
$only_differences = GETPOSTINT('only_differences');

// Initialize objects
$form = new Form($db);
$formcompany = new FormCompany($db);
$datanorm = new Datanorm($db);

// Store pending changes in session
if (!isset($_SESSION['datanorm_pending_changes'])) {
    $_SESSION['datanorm_pending_changes'] = array();
}

/*
 * Actions
 */

// Apply single row update
if ($action == 'apply_single' && GETPOSTINT('product_id') && GETPOST('datanorm_key', 'alphanohtml')) {
    $product_id = GETPOSTINT('product_id');
    $datanorm_key = GETPOST('datanorm_key', 'alphanohtml');
    $apply_price = GETPOSTINT('apply_price');
    $apply_description = GETPOSTINT('apply_description');
    $apply_label = GETPOSTINT('apply_label');

    $result = applyDatanormUpdate($db, $user, $product_id, $datanorm_key, $fk_soc, $apply_price, $apply_description, $apply_label);

    if ($result > 0) {
        setEventMessages($langs->trans('ProductUpdated'), null, 'mesgs');
    } else {
        setEventMessages($langs->trans('ErrorUpdatingProduct'), null, 'errors');
    }

    // Redirect to same page with same parameters
    header('Location: '.$_SERVER['PHP_SELF'].'?fk_soc='.$fk_soc.'&search_mode='.$search_mode.'&search_term='.urlencode($search_term).'&filter_price='.$filter_price.'&filter_description='.$filter_description.'&filter_label='.$filter_label.'&only_differences='.$only_differences);
    exit;
}

// Add to pending changes
if ($action == 'add_pending') {
    $product_id = GETPOSTINT('product_id');
    $datanorm_key = GETPOST('datanorm_key', 'alphanohtml');
    $apply_fields = GETPOST('apply_fields', 'array');

    if ($product_id > 0 && !empty($datanorm_key)) {
        $_SESSION['datanorm_pending_changes'][$product_id] = array(
            'datanorm_key' => $datanorm_key,
            'fk_soc' => $fk_soc,
            'apply_fields' => $apply_fields
        );
        setEventMessages($langs->trans('AddedToPendingChanges'), null, 'mesgs');
    }
}

// Remove from pending
if ($action == 'remove_pending') {
    $product_id = GETPOSTINT('product_id');
    unset($_SESSION['datanorm_pending_changes'][$product_id]);
}

// Clear all pending
if ($action == 'clear_pending') {
    $_SESSION['datanorm_pending_changes'] = array();
    setEventMessages($langs->trans('PendingChangesCleared'), null, 'mesgs');
}

// Show confirmation dialog
if ($action == 'confirm_apply_all') {
    // Will be handled in view section
}

// Apply all pending changes
if ($action == 'apply_all_confirmed' && GETPOST('confirm', 'alpha') == 'yes') {
    $success = 0;
    $errors = 0;

    foreach ($_SESSION['datanorm_pending_changes'] as $product_id => $change) {
        $apply_price = in_array('price', $change['apply_fields']) ? 1 : 0;
        $apply_description = in_array('description', $change['apply_fields']) ? 1 : 0;
        $apply_label = in_array('label', $change['apply_fields']) ? 1 : 0;

        $result = applyDatanormUpdate($db, $user, $product_id, $change['datanorm_key'], $change['fk_soc'], $apply_price, $apply_description, $apply_label);

        if ($result > 0) {
            $success++;
        } else {
            $errors++;
        }
    }

    $_SESSION['datanorm_pending_changes'] = array();
    setEventMessages($langs->trans('DatanormMassUpdateComplete', $success, $errors), null, 'mesgs');

    header('Location: '.$_SERVER['PHP_SELF']);
    exit;
}

/*
 * View
 */

$title = $langs->trans('DatanormMassUpdate');
llxHeader('', $title, '', '', 0, 0, '', '', '', 'mod-importzugferd page-datanorm-update');

print load_fiche_titre($title, '', 'fa-sync');

// Check if Datanorm data exists
$sql = "SELECT COUNT(*) as cnt FROM ".MAIN_DB_PREFIX."importzugferd_datanorm";
$resql = $db->query($sql);
$obj = $db->fetch_object($resql);
if ($obj->cnt == 0) {
    print '<div class="warning">'.$langs->trans('NoDatanormData').'</div>';
    print '<br><a href="'.dol_buildpath('/importzugferd/datanorm.php', 1).'" class="button">'.$langs->trans('UploadDatanorm').'</a>';
    llxFooter();
    $db->close();
    exit;
}

// Search form
print '<form method="POST" action="'.$_SERVER['PHP_SELF'].'" name="searchform">';
print '<input type="hidden" name="token" value="'.newToken().'">';
print '<input type="hidden" name="action" value="search">';

print '<div class="fichecenter">';
print '<div class="div-table-responsive-no-min">';
print '<table class="noborder centpercent">';

// Supplier selection
print '<tr class="liste_titre">';
print '<td colspan="4">'.$langs->trans('SelectSupplier').'</td>';
print '</tr>';

print '<tr class="oddeven">';
print '<td class="titlefield">'.$langs->trans('Supplier').'</td>';
print '<td colspan="3">';
// Get suppliers with Datanorm data
$sql = "SELECT DISTINCT s.rowid, s.nom FROM ".MAIN_DB_PREFIX."societe s";
$sql .= " INNER JOIN ".MAIN_DB_PREFIX."importzugferd_datanorm d ON d.fk_soc = s.rowid";
$sql .= " WHERE s.fournisseur = 1";
$sql .= " ORDER BY s.nom";
$resql = $db->query($sql);
print '<select name="fk_soc" class="flat minwidth300" onchange="this.form.submit()">';
print '<option value="">'.$langs->trans('SelectASupplier').'</option>';
while ($obj = $db->fetch_object($resql)) {
    $selected = ($obj->rowid == $fk_soc) ? 'selected' : '';
    print '<option value="'.$obj->rowid.'" '.$selected.'>'.dol_escape_htmltag($obj->nom).'</option>';
}
print '</select>';
print '</td>';
print '</tr>';

// Search mode
print '<tr class="oddeven">';
print '<td>'.$langs->trans('SearchMode').'</td>';
print '<td colspan="3">';
print '<input type="radio" name="search_mode" value="supplier" id="mode_supplier" '.($search_mode == 'supplier' ? 'checked' : '').'>';
print '<label for="mode_supplier"> '.$langs->trans('SearchBySupplierProducts').'</label>';
print ' &nbsp; &nbsp; ';
print '<input type="radio" name="search_mode" value="manual" id="mode_manual" '.($search_mode == 'manual' ? 'checked' : '').'>';
print '<label for="mode_manual"> '.$langs->trans('ManualSearch').'</label>';
print '</td>';
print '</tr>';

// Manual search term
print '<tr class="oddeven" id="manual_search_row" style="'.($search_mode != 'manual' ? 'display:none;' : '').'">';
print '<td>'.$langs->trans('SearchTerm').'</td>';
print '<td colspan="3">';
print '<input type="text" name="search_term" value="'.dol_escape_htmltag($search_term).'" class="minwidth300" placeholder="'.$langs->trans('ArticleNumberOrName').'">';
print '</td>';
print '</tr>';

// Additional search options
print '<tr class="oddeven">';
print '<td>'.$langs->trans('AdditionalSearchOptions').'</td>';
print '<td colspan="3">';
print '<input type="checkbox" name="search_by_name" value="1" id="search_by_name" '.($search_by_name ? 'checked' : '').'>';
print '<label for="search_by_name"> '.$langs->trans('AlsoSearchByName').'</label>';
print ' &nbsp; ';
print '<input type="checkbox" name="search_by_ean" value="1" id="search_by_ean" '.($search_by_ean ? 'checked' : '').'>';
print '<label for="search_by_ean"> '.$langs->trans('AlsoSearchByEAN').'</label>';
print ' &nbsp; ';
print '<input type="checkbox" name="search_by_ref" value="1" id="search_by_ref" '.($search_by_ref ? 'checked' : '').'>';
print '<label for="search_by_ref"> '.$langs->trans('AlsoSearchByRef').'</label>';
print '</td>';
print '</tr>';

// Filter: What to compare/update
print '<tr class="liste_titre">';
print '<td colspan="4">'.$langs->trans('FieldsToCompare').'</td>';
print '</tr>';

print '<tr class="oddeven">';
print '<td>'.$langs->trans('Fields').'</td>';
print '<td colspan="3">';
print '<input type="checkbox" name="filter_price" value="1" id="filter_price" '.($filter_price ? 'checked' : '').'>';
print '<label for="filter_price"> '.$langs->trans('Price').'</label>';
print ' &nbsp; ';
print '<input type="checkbox" name="filter_description" value="1" id="filter_description" '.($filter_description ? 'checked' : '').'>';
print '<label for="filter_description"> '.$langs->trans('Description').'</label>';
print ' &nbsp; ';
print '<input type="checkbox" name="filter_label" value="1" id="filter_label" '.($filter_label ? 'checked' : '').'>';
print '<label for="filter_label"> '.$langs->trans('Label').'</label>';
print '</td>';
print '</tr>';

// Only show differences
print '<tr class="oddeven">';
print '<td>'.$langs->trans('Display').'</td>';
print '<td colspan="3">';
print '<input type="checkbox" name="only_differences" value="1" id="only_differences" '.($only_differences ? 'checked' : '').'>';
print '<label for="only_differences"> '.$langs->trans('OnlyShowDifferences').'</label>';
print '</td>';
print '</tr>';

print '</table>';
print '</div>';
print '</div>';

print '<div class="center" style="margin: 10px;">';
print '<input type="submit" class="button button-primary" value="'.$langs->trans('Search').'">';
if (!empty($_SESSION['datanorm_pending_changes'])) {
    print ' &nbsp; <a href="'.$_SERVER['PHP_SELF'].'?action=clear_pending&token='.newToken().'" class="button">'.$langs->trans('ClearPendingChanges').' ('.count($_SESSION['datanorm_pending_changes']).')</a>';
}
print '</div>';

print '</form>';

// JavaScript for toggling manual search
print '<script>
document.querySelectorAll("input[name=search_mode]").forEach(function(radio) {
    radio.addEventListener("change", function() {
        document.getElementById("manual_search_row").style.display = (this.value == "manual") ? "" : "none";
    });
});
</script>';

// Results
if ($fk_soc > 0 && ($action == 'search' || GETPOST('search_mode'))) {
    $comparison_results = array();

    if ($search_mode == 'supplier') {
        // Find all products linked to this supplier
        $comparison_results = findProductsForSupplier($db, $fk_soc, $search_by_name, $search_by_ean, $search_by_ref);
    } elseif ($search_mode == 'manual' && !empty($search_term)) {
        // Manual search in Datanorm
        $comparison_results = searchDatanormProducts($db, $fk_soc, $search_term, $search_by_name, $search_by_ean, $search_by_ref);
    }

    // Filter results if needed
    if ($only_differences) {
        $comparison_results = array_filter($comparison_results, function($item) use ($filter_price, $filter_description, $filter_label) {
            return ($filter_price && $item['price_differs']) ||
                   ($filter_description && $item['description_differs']) ||
                   ($filter_label && $item['label_differs']);
        });
    }

    if (!empty($comparison_results)) {
        print '<br>';
        print '<div class="div-table-responsive">';
        print '<table class="noborder centpercent">';

        // Header
        print '<tr class="liste_titre">';
        print '<th>'.$langs->trans('Product').'</th>';
        print '<th>'.$langs->trans('DatanormArticle').'</th>';
        if ($filter_price) {
            print '<th class="right">'.$langs->trans('CurrentPrice').'</th>';
            print '<th class="right">'.$langs->trans('DatanormPrice').'</th>';
        }
        if ($filter_description) {
            print '<th>'.$langs->trans('CurrentDescription').'</th>';
            print '<th>'.$langs->trans('DatanormDescription').'</th>';
        }
        if ($filter_label) {
            print '<th>'.$langs->trans('CurrentLabel').'</th>';
            print '<th>'.$langs->trans('DatanormLabel').'</th>';
        }
        print '<th class="center">'.$langs->trans('Actions').'</th>';
        print '</tr>';

        foreach ($comparison_results as $item) {
            $has_difference = ($filter_price && $item['price_differs']) ||
                              ($filter_description && $item['description_differs']) ||
                              ($filter_label && $item['label_differs']);

            $rowClass = $has_difference ? 'oddeven highlighted' : 'oddeven';

            print '<tr class="'.$rowClass.'">';

            // Product
            print '<td>';
            if ($item['product_id'] > 0) {
                $product = new Product($db);
                $product->fetch($item['product_id']);
                print $product->getNomUrl(1, '', 0, 0, 0, 1, 1); // Open in new tab
                print '<br><span class="opacitymedium">'.$product->ref.'</span>';
            } else {
                print '<span class="opacitymedium">'.$langs->trans('ProductNotInDatabase').'</span>';
            }
            print '</td>';

            // Datanorm article
            print '<td>';
            print '<strong>'.dol_escape_htmltag($item['datanorm_ref']).'</strong>';
            print '<br><span class="opacitymedium">'.dol_escape_htmltag(dol_trunc($item['datanorm_name'], 50)).'</span>';
            print '</td>';

            // Price comparison
            if ($filter_price) {
                $priceStyle = $item['price_differs'] ? 'background-color: #fcf8e3;' : '';
                print '<td class="right nowraponall" style="'.$priceStyle.'">';
                if ($item['product_id'] > 0) {
                    print price($item['current_price']);
                } else {
                    print '-';
                }
                print '</td>';
                print '<td class="right nowraponall" style="'.$priceStyle.'">';
                print price($item['datanorm_price']);
                if ($item['price_differs'] && $item['product_id'] > 0) {
                    $diff = $item['datanorm_price'] - $item['current_price'];
                    $diffPercent = ($item['current_price'] > 0) ? ($diff / $item['current_price'] * 100) : 0;
                    print '<br>';
                    if ($diff > 0) {
                        print '<span style="color: #d9534f;"><i class="fas fa-arrow-up"></i> +'.number_format($diffPercent, 1).'%</span>';
                    } else {
                        print '<span style="color: #5cb85c;"><i class="fas fa-arrow-down"></i> '.number_format($diffPercent, 1).'%</span>';
                    }
                }
                print '</td>';
            }

            // Description comparison
            if ($filter_description) {
                $descStyle = $item['description_differs'] ? 'background-color: #fcf8e3;' : '';
                print '<td style="'.$descStyle.'">';
                print dol_escape_htmltag(dol_trunc($item['current_description'], 80));
                print '</td>';
                print '<td style="'.$descStyle.'">';
                print dol_escape_htmltag(dol_trunc($item['datanorm_description'], 80));
                print '</td>';
            }

            // Label comparison
            if ($filter_label) {
                $labelStyle = $item['label_differs'] ? 'background-color: #fcf8e3;' : '';
                print '<td style="'.$labelStyle.'">';
                print dol_escape_htmltag($item['current_label']);
                print '</td>';
                print '<td style="'.$labelStyle.'">';
                print dol_escape_htmltag($item['datanorm_label']);
                print '</td>';
            }

            // Actions
            print '<td class="center nowraponall">';
            if ($item['product_id'] > 0 && $has_difference) {
                // Quick apply form
                print '<form method="POST" action="'.$_SERVER['PHP_SELF'].'" style="display:inline;">';
                print '<input type="hidden" name="token" value="'.newToken().'">';
                print '<input type="hidden" name="action" value="apply_single">';
                print '<input type="hidden" name="product_id" value="'.$item['product_id'].'">';
                print '<input type="hidden" name="datanorm_key" value="'.dol_escape_htmltag($item['datanorm_key']).'">';
                print '<input type="hidden" name="fk_soc" value="'.$fk_soc.'">';
                print '<input type="hidden" name="search_mode" value="'.$search_mode.'">';
                print '<input type="hidden" name="search_term" value="'.dol_escape_htmltag($search_term).'">';
                print '<input type="hidden" name="filter_price" value="'.$filter_price.'">';
                print '<input type="hidden" name="filter_description" value="'.$filter_description.'">';
                print '<input type="hidden" name="filter_label" value="'.$filter_label.'">';
                print '<input type="hidden" name="only_differences" value="'.$only_differences.'">';

                // Checkboxes for what to apply
                if ($filter_price && $item['price_differs']) {
                    print '<input type="checkbox" name="apply_price" value="1" checked title="'.$langs->trans('Price').'">';
                    print '<span class="opacitymedium">P</span> ';
                }
                if ($filter_description && $item['description_differs']) {
                    print '<input type="checkbox" name="apply_description" value="1" checked title="'.$langs->trans('Description').'">';
                    print '<span class="opacitymedium">D</span> ';
                }
                if ($filter_label && $item['label_differs']) {
                    print '<input type="checkbox" name="apply_label" value="1" checked title="'.$langs->trans('Label').'">';
                    print '<span class="opacitymedium">L</span> ';
                }

                print '<button type="submit" class="button smallpaddingimp" title="'.$langs->trans('ApplyChanges').'">';
                print '<i class="fas fa-check"></i>';
                print '</button>';
                print '</form>';

                // Add to pending
                $isPending = isset($_SESSION['datanorm_pending_changes'][$item['product_id']]);
                if (!$isPending) {
                    print ' <a href="'.$_SERVER['PHP_SELF'].'?action=add_pending&product_id='.$item['product_id'].'&datanorm_key='.urlencode($item['datanorm_key']).'&fk_soc='.$fk_soc.'&apply_fields[]=price&apply_fields[]=description&apply_fields[]=label&token='.newToken().'" class="button smallpaddingimp" title="'.$langs->trans('AddToPending').'">';
                    print '<i class="fas fa-plus"></i>';
                    print '</a>';
                } else {
                    print ' <span class="badge badge-status4">'.$langs->trans('Pending').'</span>';
                }
            } elseif ($item['product_id'] == 0) {
                // Create product link
                print '<a href="'.dol_buildpath('/product/card.php', 1).'?action=create&type=0" class="button smallpaddingimp" title="'.$langs->trans('CreateProduct').'" target="_blank">';
                print '<i class="fas fa-plus"></i>';
                print '</a>';
            } else {
                print '<span class="opacitymedium">'.$langs->trans('NoChanges').'</span>';
            }
            print '</td>';

            print '</tr>';
        }

        print '</table>';
        print '</div>';

        // Summary and mass apply button
        $pendingCount = count($_SESSION['datanorm_pending_changes']);
        if ($pendingCount > 0) {
            print '<br>';
            print '<div class="center">';
            print '<a href="'.$_SERVER['PHP_SELF'].'?action=confirm_apply_all&token='.newToken().'" class="button button-primary">';
            print '<i class="fas fa-check-double paddingright"></i>'.$langs->trans('ApplyAllPendingChanges').' ('.$pendingCount.')';
            print '</a>';
            print '</div>';
        }

    } else {
        print '<br><div class="opacitymedium center">'.$langs->trans('NoResultsFound').'</div>';
    }
}

// Confirmation dialog for mass apply
if ($action == 'confirm_apply_all' && !empty($_SESSION['datanorm_pending_changes'])) {
    print '<br><br>';
    print '<div class="confirmmessage">';
    print '<h3>'.$langs->trans('ConfirmMassUpdate').'</h3>';
    print '<p>'.$langs->trans('FollowingProductsWillBeUpdated').':</p>';

    print '<table class="noborder centpercent">';
    print '<tr class="liste_titre">';
    print '<th>'.$langs->trans('Product').'</th>';
    print '<th>'.$langs->trans('Changes').'</th>';
    print '</tr>';

    foreach ($_SESSION['datanorm_pending_changes'] as $product_id => $change) {
        $product = new Product($db);
        $product->fetch($product_id);

        print '<tr class="oddeven">';
        print '<td>'.$product->getNomUrl(1).' - '.$product->label.'</td>';
        print '<td>';
        $changes = array();
        if (in_array('price', $change['apply_fields'])) $changes[] = $langs->trans('Price');
        if (in_array('description', $change['apply_fields'])) $changes[] = $langs->trans('Description');
        if (in_array('label', $change['apply_fields'])) $changes[] = $langs->trans('Label');
        print implode(', ', $changes);
        print '</td>';
        print '</tr>';
    }

    print '</table>';

    print '<br>';
    print '<form method="POST" action="'.$_SERVER['PHP_SELF'].'">';
    print '<input type="hidden" name="token" value="'.newToken().'">';
    print '<input type="hidden" name="action" value="apply_all_confirmed">';
    print '<input type="hidden" name="confirm" value="yes">';
    print '<div class="center">';
    print '<input type="submit" class="button button-primary" value="'.$langs->trans('Confirm').'">';
    print ' &nbsp; ';
    print '<a href="'.$_SERVER['PHP_SELF'].'" class="button">'.$langs->trans('Cancel').'</a>';
    print '</div>';
    print '</form>';

    print '</div>';
}

print '<style>
.highlighted { background-color: #fff3cd !important; }
.confirmmessage { background: #f8f9fa; padding: 20px; border: 1px solid #dee2e6; border-radius: 5px; }
</style>';

llxFooter();
$db->close();

/*
 * Helper functions
 */

/**
 * Find products linked to a supplier and compare with Datanorm
 */
function findProductsForSupplier($db, $fk_soc, $search_by_name = 0, $search_by_ean = 0, $search_by_ref = 0)
{
    global $conf;

    $results = array();

    // Get all supplier products
    $sql = "SELECT DISTINCT pf.fk_product, pf.ref_fourn, pf.price as fourn_price, p.ref, p.label, p.description, p.barcode";
    $sql .= " FROM ".MAIN_DB_PREFIX."product_fournisseur_price pf";
    $sql .= " INNER JOIN ".MAIN_DB_PREFIX."product p ON p.rowid = pf.fk_product";
    $sql .= " WHERE pf.fk_soc = ".((int)$fk_soc);
    $sql .= " AND pf.entity IN (".getEntity('product').")";

    $resql = $db->query($sql);
    if ($resql) {
        while ($obj = $db->fetch_object($resql)) {
            // Try to find matching Datanorm article
            $datanorm = findDatanormMatch($db, $fk_soc, $obj->ref_fourn, $obj->label, $obj->barcode, $obj->ref, $search_by_name, $search_by_ean, $search_by_ref);

            if ($datanorm) {
                $results[] = buildComparisonResult($obj, $datanorm);
            }
        }
    }

    return $results;
}

/**
 * Search Datanorm products manually
 */
function searchDatanormProducts($db, $fk_soc, $search_term, $search_by_name = 0, $search_by_ean = 0, $search_by_ref = 0)
{
    global $conf;

    $results = array();

    // Search in Datanorm
    $sql = "SELECT d.* FROM ".MAIN_DB_PREFIX."importzugferd_datanorm d";
    $sql .= " WHERE d.fk_soc = ".((int)$fk_soc);
    $sql .= " AND (d.article_number LIKE '%".$db->escape($search_term)."%'";
    $sql .= " OR d.short_text1 LIKE '%".$db->escape($search_term)."%'";
    $sql .= " OR d.short_text2 LIKE '%".$db->escape($search_term)."%'";
    if ($search_by_ean) {
        $sql .= " OR d.ean LIKE '%".$db->escape($search_term)."%'";
    }
    $sql .= ")";
    $sql .= " ORDER BY d.article_number";
    $sql .= " LIMIT 100";

    $resql = $db->query($sql);
    if ($resql) {
        while ($datanorm = $db->fetch_object($resql)) {
            // Try to find matching product in database
            $product = findProductMatch($db, $fk_soc, $datanorm);

            $results[] = array(
                'product_id' => $product ? $product->rowid : 0,
                'current_price' => $product ? getSupplierPrice($db, $product->rowid, $fk_soc) : 0,
                'current_description' => $product ? $product->description : '',
                'current_label' => $product ? $product->label : '',
                'datanorm_key' => $datanorm->article_number,
                'datanorm_ref' => $datanorm->article_number,
                'datanorm_name' => $datanorm->short_text1,
                'datanorm_price' => $datanorm->price,
                'datanorm_description' => trim($datanorm->short_text1.' '.$datanorm->short_text2),
                'datanorm_label' => $datanorm->short_text1,
                'price_differs' => $product && abs(getSupplierPrice($db, $product->rowid, $fk_soc) - $datanorm->price) > 0.01,
                'description_differs' => $product && $product->description != trim($datanorm->short_text1.' '.$datanorm->short_text2),
                'label_differs' => $product && $product->label != $datanorm->short_text1,
            );
        }
    }

    return $results;
}

/**
 * Find Datanorm match for a product
 */
function findDatanormMatch($db, $fk_soc, $ref_fourn, $label, $barcode, $ref, $search_by_name, $search_by_ean, $search_by_ref)
{
    // First try by supplier reference (article number)
    $sql = "SELECT * FROM ".MAIN_DB_PREFIX."importzugferd_datanorm";
    $sql .= " WHERE fk_soc = ".((int)$fk_soc);
    $sql .= " AND article_number = '".$db->escape($ref_fourn)."'";
    $sql .= " LIMIT 1";

    $resql = $db->query($sql);
    if ($resql && $db->num_rows($resql) > 0) {
        return $db->fetch_object($resql);
    }

    // Try by EAN if enabled
    if ($search_by_ean && !empty($barcode)) {
        $sql = "SELECT * FROM ".MAIN_DB_PREFIX."importzugferd_datanorm";
        $sql .= " WHERE fk_soc = ".((int)$fk_soc);
        $sql .= " AND ean = '".$db->escape($barcode)."'";
        $sql .= " LIMIT 1";

        $resql = $db->query($sql);
        if ($resql && $db->num_rows($resql) > 0) {
            return $db->fetch_object($resql);
        }
    }

    // Try by product ref if enabled
    if ($search_by_ref && !empty($ref)) {
        $sql = "SELECT * FROM ".MAIN_DB_PREFIX."importzugferd_datanorm";
        $sql .= " WHERE fk_soc = ".((int)$fk_soc);
        $sql .= " AND article_number = '".$db->escape($ref)."'";
        $sql .= " LIMIT 1";

        $resql = $db->query($sql);
        if ($resql && $db->num_rows($resql) > 0) {
            return $db->fetch_object($resql);
        }
    }

    return null;
}

/**
 * Find product match for Datanorm article
 */
function findProductMatch($db, $fk_soc, $datanorm)
{
    // Try by supplier reference
    $sql = "SELECT p.* FROM ".MAIN_DB_PREFIX."product p";
    $sql .= " INNER JOIN ".MAIN_DB_PREFIX."product_fournisseur_price pf ON pf.fk_product = p.rowid";
    $sql .= " WHERE pf.fk_soc = ".((int)$fk_soc);
    $sql .= " AND pf.ref_fourn = '".$db->escape($datanorm->article_number)."'";
    $sql .= " LIMIT 1";

    $resql = $db->query($sql);
    if ($resql && $db->num_rows($resql) > 0) {
        return $db->fetch_object($resql);
    }

    // Try by EAN
    if (!empty($datanorm->ean)) {
        $sql = "SELECT * FROM ".MAIN_DB_PREFIX."product";
        $sql .= " WHERE barcode = '".$db->escape($datanorm->ean)."'";
        $sql .= " LIMIT 1";

        $resql = $db->query($sql);
        if ($resql && $db->num_rows($resql) > 0) {
            return $db->fetch_object($resql);
        }
    }

    return null;
}

/**
 * Get supplier price for a product
 */
function getSupplierPrice($db, $product_id, $fk_soc)
{
    $sql = "SELECT price FROM ".MAIN_DB_PREFIX."product_fournisseur_price";
    $sql .= " WHERE fk_product = ".((int)$product_id);
    $sql .= " AND fk_soc = ".((int)$fk_soc);
    $sql .= " ORDER BY rowid DESC LIMIT 1";

    $resql = $db->query($sql);
    if ($resql && $db->num_rows($resql) > 0) {
        $obj = $db->fetch_object($resql);
        return $obj->price;
    }
    return 0;
}

/**
 * Build comparison result array
 */
function buildComparisonResult($product, $datanorm)
{
    global $db;

    $fk_soc = $datanorm->fk_soc;
    $current_price = $product->fourn_price;

    return array(
        'product_id' => $product->fk_product,
        'current_price' => $current_price,
        'current_description' => $product->description,
        'current_label' => $product->label,
        'datanorm_key' => $datanorm->article_number,
        'datanorm_ref' => $datanorm->article_number,
        'datanorm_name' => $datanorm->short_text1,
        'datanorm_price' => $datanorm->price,
        'datanorm_description' => trim($datanorm->short_text1.' '.$datanorm->short_text2),
        'datanorm_label' => $datanorm->short_text1,
        'price_differs' => abs($current_price - $datanorm->price) > 0.01,
        'description_differs' => $product->description != trim($datanorm->short_text1.' '.$datanorm->short_text2),
        'label_differs' => $product->label != $datanorm->short_text1,
    );
}

/**
 * Apply Datanorm update to a product
 */
function applyDatanormUpdate($db, $user, $product_id, $datanorm_key, $fk_soc, $apply_price, $apply_description, $apply_label)
{
    // Get Datanorm data
    $sql = "SELECT * FROM ".MAIN_DB_PREFIX."importzugferd_datanorm";
    $sql .= " WHERE fk_soc = ".((int)$fk_soc);
    $sql .= " AND article_number = '".$db->escape($datanorm_key)."'";

    $resql = $db->query($sql);
    if (!$resql || $db->num_rows($resql) == 0) {
        return -1;
    }

    $datanorm = $db->fetch_object($resql);

    // Load product
    $product = new Product($db);
    $result = $product->fetch($product_id);
    if ($result <= 0) {
        return -2;
    }

    $updated = false;

    // Update label
    if ($apply_label && $product->label != $datanorm->short_text1) {
        $product->label = $datanorm->short_text1;
        $updated = true;
    }

    // Update description
    if ($apply_description) {
        $new_desc = trim($datanorm->short_text1.' '.$datanorm->short_text2);
        if ($product->description != $new_desc) {
            $product->description = $new_desc;
            $updated = true;
        }
    }

    // Save product changes
    if ($updated) {
        $result = $product->update($product->id, $user);
        if ($result < 0) {
            return -3;
        }
    }

    // Update supplier price
    if ($apply_price) {
        $productFourn = new ProductFournisseur($db);
        $productFourn->fetch($product_id);

        // Find existing supplier price
        $sql = "SELECT rowid, quantity FROM ".MAIN_DB_PREFIX."product_fournisseur_price";
        $sql .= " WHERE fk_product = ".((int)$product_id);
        $sql .= " AND fk_soc = ".((int)$fk_soc);
        $sql .= " ORDER BY rowid DESC LIMIT 1";

        $resql = $db->query($sql);
        if ($resql && $db->num_rows($resql) > 0) {
            $priceObj = $db->fetch_object($resql);

            // Update existing price
            $result = $productFourn->update_buyprice(
                $priceObj->quantity,
                $datanorm->price,
                $user,
                'HT',
                $fk_soc,
                0, // availability
                $datanorm->article_number, // ref_fourn
                0, // tva_tx
                0, // charges
                0, // remise_percent
                0, // remise
                0, // newnpr
                0, // delivery_time_days
                '', // supplier_reputation
                array(), // localtaxes
                '', // newdefaultvatcode
                0, // multicurrency_buyprice
                '', // multicurrency_price_base_type
                0, // multicurrency_tx
                '', // multicurrency_code
                '', // desc_fourn
                '', // barcode
                0, // fk_barcode_type
                array() // options
            );

            if ($result < 0) {
                return -4;
            }
        }
    }

    return 1;
}