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

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

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

    // Recupera e sanifica i dati
    $id = intval($_POST['id']);
    $name = trim($_POST['name']);
    $header_row = intval($_POST['header_row']);
    $start_column = trim($_POST['start_column']);
    $description = trim($_POST['description'] ?? '');
    $target_table = trim($_POST['target_table']);
    $idclient = intval($_POST['client_id'] ?? 0); // Usa client_id dal form
    $clientname = trim($_POST['client_name'] ?? ''); // Usa client_name dal form
    $client_specific_fields = trim($_POST['client_specific_fields'] ?? '{}'); // Recupera il JSON dei campi specifici

    // Controllo sui campi obbligatori
    if (empty($id) || empty($name) || empty($header_row) || empty($start_column) || empty($target_table)) {
        throw new Exception("All fields marked with * are required.");
    }

    // Validazione del idclient
    if ($idclient <= 0) {
        throw new Exception("Please select a valid client.");
    }

    // Validazione opzionale del JSON (per sicurezza)
    $decoded_fields = json_decode($client_specific_fields, true);
    if (json_last_error() !== JSON_ERROR_NONE && $client_specific_fields !== '{}') {
        throw new Exception("Invalid JSON format for client-specific fields.");
    }

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

    // Aggiorna il database, includendo idclient, clientname e client_specific_fields
    $stmt = $pdo->prepare("UPDATE excel_templates 
                           SET name = ?, header_row = ?, start_column = ?, description = ?, target_table = ?, 
                               idclient = ?, clientname = ?, client_specific_fields = ?, updated_at = NOW() 
                           WHERE id = ?");
    $stmt->execute([
        $name,
        $header_row,
        $start_column,
        $description,
        $target_table,
        $idclient,
        $clientname,
        $client_specific_fields,
        $id
    ]);

    // rowCount potrebbe essere 0 se non ci sono modifiche, quindi consideriamo comunque un successo
    $response["success"] = true;
    $response["message"] = "Template updated successfully!";
} catch (Exception $e) {
    $response["message"] = $e->getMessage();
}

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