<?php
require_once dirname(__DIR__, 2) . '/vendor/autoload.php';
require_once dirname(__FILE__) . '/class/VisualLimsApiClient.class.php';
require_once dirname(__FILE__) . '/include/headscript.php';

header('Content-Type: application/json');
ini_set('display_errors', '0');
error_reporting(E_ALL);

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

    $api = VisualLimsApiClient::getInstance();

    // Get all schemas currently used in template_mapping
    $stmtSchemas = $pdo->query("
        SELECT DISTINCT schema_id
        FROM template_mapping
        WHERE schema_id IS NOT NULL
          AND schema_id > 0
        ORDER BY schema_id ASC
    ");

    $schemaIds = $stmtSchemas->fetchAll(PDO::FETCH_COLUMN);

    if (empty($schemaIds)) {
        throw new Exception('No schema_id found in template_mapping');
    }

    $stmtUpdate = $pdo->prepare("
        UPDATE template_mapping
        SET field_order = ?
        WHERE schema_id = ?
          AND field_id = ?
    ");

    $summary = [];
    $totalUpdated = 0;

    foreach ($schemaIds as $schemaId) {
        $schemaId = (int)$schemaId;

        $endpoint = "SchemaCustomField($schemaId)?\$expand=SchemiCustomFieldsDettagli(\$expand=CustomField)";
        $data = $api->get($endpoint);

        if (empty($data['SchemiCustomFieldsDettagli']) || !is_array($data['SchemiCustomFieldsDettagli'])) {
            $summary[] = [
                'schema_id' => $schemaId,
                'success' => false,
                'message' => 'No SchemiCustomFieldsDettagli found'
            ];
            continue;
        }

        $schemaUpdated = 0;
        $notFound = [];

        foreach ($data['SchemiCustomFieldsDettagli'] as $detail) {
            $order = intval($detail['Ordine'] ?? 9999);
            $fieldId = intval($detail['CustomField']['IdCustomField'] ?? 0);

            if ($fieldId <= 0) {
                continue;
            }

            $stmtUpdate->execute([
                $order,
                $schemaId,
                $fieldId
            ]);

            if ($stmtUpdate->rowCount() > 0) {
                $schemaUpdated++;
                $totalUpdated++;
            } else {
                $notFound[] = [
                    'field_id' => $fieldId,
                    'order' => $order,
                    'label' => $detail['CustomField']['Titolo'] ?? ''
                ];
            }
        }

        $summary[] = [
            'schema_id' => $schemaId,
            'success' => true,
            'updated' => $schemaUpdated,
            'not_found_count' => count($notFound),
            'not_found' => $notFound
        ];
    }

    echo json_encode([
        'success' => true,
        'schemas_processed' => count($schemaIds),
        'total_updated' => $totalUpdated,
        'summary' => $summary
    ], JSON_PRETTY_PRINT);
} catch (Exception $e) {
    http_response_code(500);

    echo json_encode([
        'success' => false,
        'message' => $e->getMessage()
    ], JSON_PRETTY_PRINT);
}