<?php
header('Content-Type: application/json');
include('include/headscript.php');

$dbHandler = DBHandlerSelect::getInstance();
$pdo = $dbHandler->getConnection();

$data = json_decode(file_get_contents('php://input'), true);

$iddatadb = $data['iddatadb'] ?? null;
$parts = $data['parts'] ?? [];

if (!$iddatadb || empty($parts)) {
    echo json_encode(['success' => false, 'message' => 'Dati mancanti']);
    exit;
}

try {
    $pdo->beginTransaction();

    // Elimina tutte le parti esistenti per l'iddatadb per evitare conflitti di unicità
    $stmt = $pdo->prepare("DELETE FROM identification_parts WHERE iddatadb = :iddatadb");
    $stmt->execute([':iddatadb' => $iddatadb]);

    // Prepara l'inserimento delle nuove parti
    $stmt = $pdo->prepare("
        INSERT INTO identification_parts
        (iddatadb, part_number, part_description, mix, created_at, updated_at)
        VALUES (:iddatadb, :part_number, :part_description, :mix, NOW(), NOW())
    ");

    $part_ids = [];
    foreach ($parts as $part) {
        $partNumber = $part['part_number'] ?? null;
        $partDescription = $part['part_description'] ?? '';
        $mix = $part['mix'] ?? 'N';

        if (!$partNumber || !$partDescription) {
            throw new PDOException("Numero parte o descrizione mancante per parte: " . json_encode($part));
        }

        $stmt->execute([
            ':iddatadb' => $iddatadb,
            ':part_number' => $partNumber,
            ':part_description' => $partDescription,
            ':mix' => $mix
        ]);
        $part_ids[] = $pdo->lastInsertId();
    }

    $pdo->commit();
    echo json_encode([
        'success' => true,
        'part_ids' => $part_ids,
        'message' => 'Parti rinumerate con successo'
    ]);
} catch (PDOException $e) {
    $pdo->rollBack();
    echo json_encode([
        'success' => false,
        'message' => 'Errore nel salvataggio: ' . $e->getMessage()
    ]);
}