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

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

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

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

// Hole die richtigen Tabellennamen für diesen Dokumenttyp
$tables = DocumentTypeHelper::getTableNames($docType);
if (!$tables) {
    echo json_encode(['success' => false, 'error' => 'Invalid document type']);
    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");
        $sql .= " WHERE ".$tables['fk_line']." = ".(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...');

// Hole alle Subtotals für dieses Dokument
$sql = "SELECT rowid, parent_section FROM ".MAIN_DB_PREFIX."facture_lines_manager
        WHERE ".$tables['fk_parent']." = ".(int)$facture_id."
        AND document_type = '".$db->escape($docType)."'
        AND line_type = 'subtotal'";
$resql = $db->query($sql);

$subtotals_to_update = array();
while ($subtotal = $db->fetch_object($resql)) {
    $subtotals_to_update[] = $subtotal;
}

foreach ($subtotals_to_update as $subtotal) {
    // 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'
                AND document_type = '".$db->escape($docType)."'";
    $res_max = $db->query($sql_max);
    $obj_max = $db->fetch_object($res_max);

    if ($obj_max && $obj_max->max_order) {
        // Subtotal kommt direkt nach dem letzten Produkt: max_order + 0.5
        $temp_order = (float)$obj_max->max_order + 0.5;

        $sql_upd = "UPDATE ".MAIN_DB_PREFIX."facture_lines_manager
                    SET line_order = ".$temp_order."
                    WHERE rowid = ".(int)$subtotal->rowid;
        $db->query($sql_upd);
        subtotaltitle_debug_log('  Subtotal #'.$subtotal->rowid.' (Section '.$subtotal->parent_section.') → temp_order='.$temp_order);
    } else {
        subtotaltitle_debug_log('  ⚠️ Subtotal #'.$subtotal->rowid.' hat keine Produkte in Section '.$subtotal->parent_section);
    }
}

// ========== SECTIONS VOR IHREN PRODUKTEN SICHERSTELLEN ==========
subtotaltitle_debug_log('🔧 Stelle sicher dass Sections vor ihren Produkten stehen...');

// Für jede Section: Wenn ein Produkt dieser Section VOR der Section steht,
// verschiebe die Section vor das erste Produkt
$sql_sections = "SELECT rowid, line_order FROM ".MAIN_DB_PREFIX."facture_lines_manager
        WHERE ".$tables['fk_parent']." = ".(int)$facture_id."
        AND document_type = '".$db->escape($docType)."'
        AND line_type = 'section'";
$res_sections = $db->query($sql_sections);

while ($section = $db->fetch_object($res_sections)) {
    // Finde das Produkt dieser Section mit der kleinsten line_order
    $sql_first_prod = "SELECT MIN(line_order) as min_order FROM ".MAIN_DB_PREFIX."facture_lines_manager
            WHERE parent_section = ".(int)$section->rowid."
            AND document_type = '".$db->escape($docType)."'
            AND line_type = 'product'";
    $res_first = $db->query($sql_first_prod);
    $first_prod = $db->fetch_object($res_first);

    if ($first_prod && $first_prod->min_order && $first_prod->min_order < $section->line_order) {
        // Section steht NACH ihrem ersten Produkt - verschiebe sie davor
        $new_section_order = (float)$first_prod->min_order - 0.5;
        $sql_move = "UPDATE ".MAIN_DB_PREFIX."facture_lines_manager
                    SET line_order = ".$new_section_order."
                    WHERE rowid = ".(int)$section->rowid;
        $db->query($sql_move);
        subtotaltitle_debug_log('  Section #'.$section->rowid.' verschoben: '.$section->line_order.' → '.$new_section_order.' (vor Produkt mit order='.$first_prod->min_order.')');
    }
}

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

$sql = "SELECT rowid FROM ".MAIN_DB_PREFIX."facture_lines_manager
        WHERE ".$tables['fk_parent']." = ".(int)$facture_id."
        AND document_type = '".$db->escape($docType)."'
        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 RANG IN DETAIL-TABELLE ==========
// Synchronisiere ALLE Zeilen die in der Detail-Tabelle sind (nicht nur Produkte!)
$sql = "SELECT ".$tables['fk_line'].", line_type FROM ".MAIN_DB_PREFIX."facture_lines_manager";
$sql .= " WHERE ".$tables['fk_parent']." = ".(int)$facture_id;
$sql .= " AND document_type = '".$db->escape($docType)."'";
$sql .= " AND ".$tables['fk_line']." IS NOT NULL";  // Alle die in Detail-Tabelle sind
$sql .= " ORDER BY line_order";
$resql = $db->query($sql);

$rang = 1;
while ($obj = $db->fetch_object($resql)) {
    $fk_line_value = $obj->{$tables['fk_line']};
    $sql_upd = "UPDATE ".MAIN_DB_PREFIX.$tables['lines_table'];
    $sql_upd .= " SET rang = ".$rang;
    $sql_upd .= " WHERE rowid = ".(int)$fk_line_value;
    $db->query($sql_upd);
    subtotaltitle_debug_log('  Sync rang: '.$obj->line_type.' #'.$fk_line_value.' → rang='.$rang);
    $rang++;
}

$db->commit();

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