<?php
header('Content-Type: application/json');
require_once 'class/db-functions.php';

// Disabilita l'output di errori HTML
ini_set('display_errors', '0');
error_reporting(E_ALL);

$response = ["success" => false, "message" => ""];

try {
    if ($_SERVER["REQUEST_METHOD"] !== "POST") {
        throw new Exception("Invalid request method.");
    }

    // Recupera i dati dal body JSON (non da $_POST direttamente)
    $input = json_decode(file_get_contents('php://input'), true);
    $template_id = isset($input['template_id']) ? intval($input['template_id']) : null;
    $schemajson = isset($input['schemajson']) ? trim($input['schemajson']) : '';

    // Controllo sui campi obbligatori
    if (empty($template_id) || empty($schemajson)) {
        throw new Exception("All fields marked with * are required, including schemajson.");
    }

    // Validazione del JSON
    $decoded_json = json_decode($schemajson, true);
    if (json_last_error() !== JSON_ERROR_NONE) {
        throw new Exception("Invalid JSON format for schemajson.");
    }

    // Connessione al database
    $db = DBHandlerSelect::getInstance();
    $pdo = $db->getConnection();

    // Aggiorna il database
    $stmt = $pdo->prepare("UPDATE excel_templates 
                           SET schemajson = ?, updated_at = NOW() 
                           WHERE id = ?");
    $stmt->execute([
        $schemajson,
        $template_id
    ]);

    if ($stmt->rowCount() > 0) {
        $response["message"] = "Schema JSON updated successfully!";
    } else {
        $response["message"] = "No changes detected, but operation completed.";
    }
    $response["success"] = true;
} catch (Exception $e) {
    $response["message"] = $e->getMessage();
}

// Restituisce un JSON per il fetch
echo json_encode($response);