<?php
define('NOTOKENRENEWAL', 1);
require '../../../main.inc.php';
require_once __DIR__.'/../lib/subtotaltitle.lib.php';

$facture_id = GETPOST('facture_id', 'int');
$new_order_json = GETPOST('new_order', 'none');

subtotaltitle_debug_log('🔄 reorder_all: facture=' . $facture_id);

if (!$facture_id || !$new_order_json) {
    echo json_encode(['success' => false, 'error' => 'Missing parameters']);
    exit;
}

$new_order = json_decode($new_order_json, true);

if (!$new_order) {
    echo json_encode(['success' => false, 'error' => 'Invalid JSON']);
    exit;
}

$db->begin();

// Für jede Zeile: line_order und parent_section updaten
foreach ($new_order as $item) {
    if ($item['type'] == 'section') {
        $sql = "UPDATE ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " SET line_order = ".(int)$item['order'];
        $sql .= " WHERE rowid = ".(int)$item['id'];
        $db->query($sql);
        subtotaltitle_debug_log('  Section #'.$item['id'].' → order='.$item['order']);
        
    } else if ($item['type'] == 'product') {
        $sql = "UPDATE ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " SET line_order = ".(int)$item['order'];
        $sql .= ", parent_section = ".($item['parent_section'] ? (int)$item['parent_section'] : "NULL");
        $sql .= " WHERE fk_facturedet = ".(int)$item['id'];
        $db->query($sql);
        subtotaltitle_debug_log('  Produkt #'.$item['id'].' → order='.$item['order'].', section='.($item['parent_section'] ?: 'FREI'));
        
    } else if ($item['type'] == 'text') {
        $sql = "UPDATE ".MAIN_DB_PREFIX."facture_lines_manager";
        $sql .= " SET line_order = ".(int)$item['order'];
        $sql .= ", parent_section = ".($item['parent_section'] ? (int)$item['parent_section'] : "NULL");
        $sql .= " WHERE rowid = ".(int)$item['id'];
        $sql .= " AND line_type = 'text'";
        $db->query($sql);
        subtotaltitle_debug_log('  Text #'.$item['id'].' → order='.$item['order'].', section='.($item['parent_section'] ?: 'FREI'));
    }
}

// ========== SUBTOTALS NEU POSITIONIEREN ==========
subtotaltitle_debug_log('🔢 Repositioniere Subtotals...');

$sql = "SELECT rowid, parent_section FROM ".MAIN_DB_PREFIX."facture_lines_manager
        WHERE fk_facture = ".(int)$facture_id."
        AND line_type = 'subtotal'";
$resql = $db->query($sql);

while ($subtotal = $db->fetch_object($resql)) {
    // Finde höchste line_order der Produkte dieser Section
    $sql_max = "SELECT MAX(line_order) as max_order
                FROM ".MAIN_DB_PREFIX."facture_lines_manager
                WHERE parent_section = ".(int)$subtotal->parent_section."
                AND line_type = 'product'";
    $res_max = $db->query($sql_max);
    $obj_max = $db->fetch_object($res_max);
    
    if ($obj_max && $obj_max->max_order) {
        // Subtotal bekommt hohe Nummer (wird gleich normalisiert)
        $temp_order = (int)$obj_max->max_order * 100 + 50;
        
        $sql_upd = "UPDATE ".MAIN_DB_PREFIX."facture_lines_manager
                    SET line_order = ".$temp_order."
                    WHERE rowid = ".(int)$subtotal->rowid;
        $db->query($sql_upd);
        subtotaltitle_debug_log('  Subtotal #'.$subtotal->rowid.' → temp_order='.$temp_order.' (nach Section '.$subtotal->parent_section.')');
    }
}

// ========== ALLES NEU DURCHNUMMERIEREN ==========
subtotaltitle_debug_log('🔢 Normalisiere line_order...');

$sql = "SELECT rowid FROM ".MAIN_DB_PREFIX."facture_lines_manager
        WHERE fk_facture = ".(int)$facture_id."
        ORDER BY line_order";
$resql = $db->query($sql);

$new_order_num = 1;
while ($obj = $db->fetch_object($resql)) {
    $sql_upd = "UPDATE ".MAIN_DB_PREFIX."facture_lines_manager
                SET line_order = ".$new_order_num."
                WHERE rowid = ".(int)$obj->rowid;
    $db->query($sql_upd);
    $new_order_num++;
}

// ========== SYNC FACTUREDET.RANG ==========
$sql = "SELECT fk_facturedet FROM ".MAIN_DB_PREFIX."facture_lines_manager";
$sql .= " WHERE fk_facture = ".(int)$facture_id;
$sql .= " AND line_type = 'product'";
$sql .= " ORDER BY line_order";
$resql = $db->query($sql);

$rang = 1;
while ($obj = $db->fetch_object($resql)) {
    $sql_upd = "UPDATE ".MAIN_DB_PREFIX."facturedet";
    $sql_upd .= " SET rang = ".$rang;
    $sql_upd .= " WHERE rowid = ".(int)$obj->fk_facturedet;
    $db->query($sql_upd);
    $rang++;
}

$db->commit();

echo json_encode(['success' => true, 'updated' => count($new_order)]);