<?php
ini_set('display_errors', 0); // in AJAX gli errori devono NON sporcare il JSON
error_reporting(E_ALL);
ini_set('log_errors', 1);
ini_set('error_log', __DIR__ . '/import_debug.log');

include('include/headscript.php');

header('Content-Type: application/json');

// Legge il body JSON
$input = json_decode(file_get_contents('php://input'), true);

if (
    !$input ||
    !isset($input['template_id']) ||
    !isset($input['importreferencecode']) ||
    !isset($input['filename']) ||
    !isset($input['columns']) ||
    !isset($input['batch_rows']) ||
    !isset($input['batch_excelrows'])
) {
    echo json_encode(['ok' => false, 'error' => 'Richiesta non valida']);
    exit;
}

$template_id         = intval($input['template_id']);
$importReferenceCode = (string)$input['importreferencecode'];
$newFilename         = (string)$input['filename'];
$columns             = $input['columns'];            // array
$batchRows           = $input['batch_rows'];         // array di righe (ognuna array di celle)
$batchExcelrows      = $input['batch_excelrows'];    // array di excelrow paralleli a batchRows

$user_id = $iduserlogin ?? 1;

function normalizeColName($s): string
{
    $s = (string)$s;
    $s = str_replace(
        ["\xC2\xA0", "\xE2\x80\xAF", "\xE2\x80\x87", "\xE2\x80\x89", "\xE2\x80\x8A", "\xEF\xBB\xBF"],
        ' ',
        $s
    );
    $s = preg_replace('/\s+/u', ' ', $s);
    return trim((string)$s);
}

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

// Recupera i mapping
$stmt = $pdo->prepare("SELECT id, excel_column, data_type, is_required, manual_default, is_manual, field_label, field_id, main_field, auto_value FROM template_mapping WHERE template_id = ?");
$stmt->execute([$template_id]);
$allMappings = $stmt->fetchAll(PDO::FETCH_ASSOC);

if (empty($allMappings)) {
    echo json_encode(['ok' => false, 'error' => 'Nessun mapping trovato per il template']);
    exit;
}

// idclient di default (una volta sola)
$template_stmt = $pdo->prepare("SELECT idclient FROM excel_templates WHERE id = ?");
$template_stmt->execute([$template_id]);
$tpl = $template_stmt->fetch(PDO::FETCH_ASSOC);
$default_idclient = $tpl['idclient'] ?? null;

// lims_user_id per il campo 244 (una volta sola)
$stmtUser = $pdo->prepare("SELECT lims_user_id FROM auth_users WHERE id = ? LIMIT 1");
$stmtUser->execute([(int)$user_id]);
$limsUserId = $stmtUser->fetchColumn();
$limsUserId = ($limsUserId !== false && $limsUserId !== null && $limsUserId !== '') ? (string)$limsUserId : '';

$stmtMap = $pdo->prepare("SELECT id FROM template_mapping WHERE template_id = ? AND field_id = 244 LIMIT 1");
$stmtMap->execute([(int)$template_id]);
$mappingId244 = (int)$stmtMap->fetchColumn();

$insertedIds = [];

try {
    $pdo->beginTransaction();

    $insDatadb = $pdo->prepare("INSERT INTO datadb (templateid, importreferencecode, filename_import, status, user_id, limscode, importdate, excelrow, idclient) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)");
    $insDetail = $pdo->prepare("INSERT INTO import_data_details (id, mapping_id, field_value) VALUES (?, ?, ?)");

    foreach ($batchRows as $i => $row) {
        $excelrow = $batchExcelrows[$i] ?? null;
        if ($row === null || $excelrow === null) {
            continue;
        }

        $insDatadb->execute([
            $template_id,
            $importReferenceCode,
            $newFilename,
            'i',
            $user_id,
            null,
            date('Y-m-d'),
            $excelrow,
            $default_idclient
        ]);

        $iddatadb = $pdo->lastInsertId();
        $insertedIds[] = $iddatadb;

        foreach ($allMappings as $mapping) {
            $fieldValue = null;
            if (!$mapping['is_manual']) {
                $excelColumn = trim($mapping['excel_column']);
                $excelColumnIndex = array_search(
                    normalizeColName($excelColumn),
                    array_map('normalizeColName', $columns)
                );
                if ($excelColumnIndex !== false && isset($row[$excelColumnIndex]) && $row[$excelColumnIndex] !== '') {
                    $fieldValue = $row[$excelColumnIndex];
                } else {
                    $fieldValue = $mapping['manual_default'] ?? '';
                }
                switch ($mapping['data_type']) {
                    case 'INT':
                        $fieldValue = is_numeric($fieldValue) ? (int)$fieldValue : ($mapping['manual_default'] ?? 0);
                        break;
                    case 'DATE':
                        $fieldValue = !empty($fieldValue) ? date('Y-m-d', strtotime($fieldValue)) : ($mapping['manual_default'] === 'today' ? date('Y-m-d') : ($mapping['manual_default'] ?? ''));
                        break;
                    case 'CHAR':
                        $fieldValue = !empty($fieldValue) ? substr((string)$fieldValue, 0, 1) : ($mapping['manual_default'] ?? '');
                        break;
                    case 'Testo':
                    case 'VARCHAR':
                    default:
                        $fieldValue = !empty($fieldValue) ? (string)$fieldValue : ($mapping['manual_default'] ?? '');
                        break;
                }
            } else {
                $fieldValue = $mapping['manual_default'] ?? '';
                if ($mapping['data_type'] === 'DATE' && $mapping['manual_default'] === 'today') {
                    $fieldValue = date('Y-m-d');
                }
            }
            if (($fieldValue === null || $fieldValue === '') && !empty($mapping['auto_value']) && $mapping['auto_value'] !== 'none') {
                if ($mapping['auto_value'] === 'import_date') {
                    $fieldValue = date('Y-m-d');
                } elseif ($mapping['auto_value'] === 'import_time') {
                    $fieldValue = date('H:i');
                }
            }

            $insDetail->execute([$iddatadb, $mapping['id'], $fieldValue]);
        }

        // Campo 244 (Accettatore) con lims_user_id
        if ($limsUserId !== '' && $mappingId244 > 0) {
            $insDetail->execute([$iddatadb, $mappingId244, $limsUserId]);
        }
    }

    $pdo->commit();

    echo json_encode([
        'ok'       => true,
        'inserted' => count($insertedIds)
    ]);
    exit;
} catch (Exception $e) {
    if ($pdo->inTransaction()) $pdo->rollBack();
    error_log("[BATCH IMPORT] " . $e->getMessage());
    echo json_encode([
        'ok'    => false,
        'error' => $e->getMessage()
    ]);
    exit;
}