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

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

// Disable PHP error display
ini_set('display_errors', '0');
error_reporting(E_ALL);

try {
    $api = VisualLimsApiClient::getInstance(); // also loads dotenv

    // In simulate mode: return fake clients built from idclient values already in datadb.
    if (($_ENV['SIMULATE_EXPORT_LIMS'] ?? '') === 'true') {
        require_once __DIR__ . '/class/db-functions.php';
        $pdo = DBHandlerSelect::getInstance()->getConnection();

        $stmt = $pdo->query("
            SELECT DISTINCT idclient
            FROM datadb
            WHERE idclient IS NOT NULL
              AND idclient > 0
            ORDER BY idclient ASC
        ");

        $ids = $stmt->fetchAll(PDO::FETCH_COLUMN);

        $fakeClients = array_map(fn($id) => [
            'IdCliente'      => (int) $id,
            'Nominativo'     => "Cliente Simulato {$id}",
            'CodiceCliente'  => "SIM_{$id}",
        ], $ids);

        echo json_encode(['value' => $fakeClients], JSON_UNESCAPED_UNICODE);
        exit;
    }

    // Endpoint senza filtri: recupera tutto
    $endpoint = 'Cliente?$top=50';

    // Funzione per eseguire la chiamata con retry
    function makeApiRequest($api, $endpoint, $maxRetries = 3)
    {
        for ($retry = 0; $retry < $maxRetries; $retry++) {
            try {
                $data = $api->get($endpoint);

                // Save response for debug
                file_put_contents(
                    __DIR__ . '/clienti_response.json',
                    json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE)
                );

                return $data;
            } catch (Exception $e) {
                $errorMessage = $e->getMessage();

                // Retry only for specific auth/token related issue
                if (
                    strpos($errorMessage, 'HTTP 400') !== false &&
                    strpos($errorMessage, 'Cannot persist the object') !== false
                ) {
                    try {
                        if (method_exists($api, 'refreshToken')) {
                            $api->refreshToken();
                            error_log("Tentativo {$retry}: refresh token eseguito per endpoint {$endpoint}");
                        } else {
                            throw new Exception('Il metodo refreshToken() non esiste in VisualLimsApiClient');
                        }
                    } catch (Exception $refreshEx) {
                        error_log("Errore durante il refresh del token: " . $refreshEx->getMessage());
                        throw new Exception("Impossibile eseguire il refresh del token: " . $refreshEx->getMessage());
                    }

                    usleep(500000); // 500ms
                    continue;
                }

                throw $e;
            }
        }

        throw new Exception("Massimo numero di tentativi raggiunto per {$endpoint}");
    }

    // Esegui la chiamata
    $data = makeApiRequest($api, $endpoint);

    echo json_encode($data, JSON_UNESCAPED_UNICODE);
} catch (Exception $e) {
    http_response_code(500);

    $errorResponse = [
        'error' => $e->getMessage(),
        'file'  => $e->getFile(),
        'line'  => $e->getLine(),
        'trace' => $e->getTraceAsString()
    ];

    error_log("Errore in get_clienti.php: " . json_encode($errorResponse, JSON_UNESCAPED_UNICODE));
    echo json_encode($errorResponse, JSON_UNESCAPED_UNICODE);
}