using MultiTerm.Protocols.Network;

namespace MultiTerm.Protocols.Helpers;

internal static class NetworkProtocolHelpers
{
    /// <summary>
    /// Returns the hostname of the <paramref name="settingsObject"/> but limited to <paramref name="maxLength"/> amount of characters.
    /// If the hostname is longer than <paramref name="maxLength"/>, '...' will be prefixed. The resulting string may also be <paramref name="maxLength"/>+3 characters long.
    /// If the hostname cannot be read, the result will be "invalid".
    /// </summary>
    /// <param name="settingsObject">settings object containing hostname</param>
    /// <param name="maxLength">max amount of characters of the resulting string</param>
    /// <returns>string with limited length (maximum amount of characters = <paramref name="maxLength"/> + 3</returns>
    public static string GetLimitedLengthHostname(INetworkProtocolSettings settingsObject, int maxLength = 20)
    {
        string limitedHostname = "invalid";
        string prefix = "...";

        if (settingsObject.Hostname != null && settingsObject.Hostname.Length >= maxLength)
        {
            limitedHostname = $"{prefix}{settingsObject.Hostname.Substring(settingsObject.Hostname.Length - maxLength, maxLength)}";
        }
        else if (settingsObject.Hostname != null)
        {
            limitedHostname = $"{settingsObject.Hostname}";
        }

        return limitedHostname;
    }
}