using Opc.Ua;
using Serilog;

namespace ZB.MOM.WW.OtOpcUa.Host.OpcUa
{
    /// <summary>
    ///     Maps a configured redundancy mode string to the OPC UA <see cref="RedundancySupport" /> enum.
    /// </summary>
    public static class RedundancyModeResolver
    {
        private static readonly ILogger Log = Serilog.Log.ForContext(typeof(RedundancyModeResolver));

        /// <summary>
        ///     Resolves the configured mode string to a <see cref="RedundancySupport" /> value.
        ///     Returns <see cref="RedundancySupport.None" /> when redundancy is disabled or the mode is unrecognized.
        /// </summary>
        /// <param name="mode">The mode string from configuration (e.g., "Warm", "Hot").</param>
        /// <param name="enabled">Whether redundancy is enabled.</param>
        /// <returns>The resolved redundancy support mode.</returns>
        public static RedundancySupport Resolve(string mode, bool enabled)
        {
            if (!enabled)
                return RedundancySupport.None;

            var resolved = (mode ?? "").Trim().ToLowerInvariant() switch
            {
                "warm" => RedundancySupport.Warm,
                "hot" => RedundancySupport.Hot,
                _ => RedundancySupport.None
            };

            if (resolved == RedundancySupport.None)
                Log.Warning("Unknown redundancy mode '{Mode}' — falling back to None. Supported modes: Warm, Hot",
                    mode);

            return resolved;
        }
    }
}