<?php
ob_start();
session_start();
require_once '../../vendor/autoload.php';

$response = ['error' => '', 'rows' => [], 'columns' => [], 'template_id' => 0, 'filename' => '', 'excel_data' => []];

try {
    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
        $input = json_decode(file_get_contents('php://input'), true);
        $template_id = isset($input['template_id']) ? intval($input['template_id']) : 0;
        $filename = $input['routine_data']['filename'] ?? '';
        $headerrow = $input['routine_data']['headerrow'] ?? 1;
        $excelData = $input['excel_data'] ?? [];
        $routineData = $input['routine_data'] ?? [];

        if (!$filename || empty($excelData)) {
            throw new Exception("Dati della routine mancanti.");
        }

        $routineFile = __DIR__ . '/routines/' . $filename;
        if (file_exists($routineFile)) {
            include_once $routineFile;
            $routineData['xls_headers'] = $_SESSION['headers'] ?? [];
            applyRoutine($excelData, $routineData); // Modifica $excelData in place
            error_log("Routine {$routineData['name']} applicata (file: {$filename}) per template {$template_id}, header row: {$headerrow}");
        } else {
            throw new Exception("File della routine non trovato: $routineFile");
        }

        // Aggiorna la sessione con i dati modificati
        $_SESSION['excel_data'] = $excelData;

        $response['excel_data'] = $excelData;
        $response['rows'] = array_column($excelData, 'data');
        $response['columns'] = $_SESSION['headers'];
        $response['template_id'] = $template_id;
        $response['filename'] = $input['filename'] ?? '';
    } else {
        $response['error'] = "Richiesta non valida.";
    }
} catch (Exception $e) {
    $response['error'] = "Errore durante l'applicazione della routine: " . $e->getMessage();
    error_log("Exception in apply_routine.php: " . $e->getMessage());
}

ob_end_clean();
header('Content-Type: application/json');
echo json_encode($response);
exit;