using System;

namespace ZB.MOM.WW.OtOpcUa.Host.Domain
{
    /// <summary>
    ///     Maps MXAccess integer quality to domain Quality enum and OPC UA StatusCodes. (MXA-009, OPC-005)
    /// </summary>
    public static class QualityMapper
    {
        /// <summary>
        ///     Maps an MXAccess quality integer (OPC DA quality byte) to domain Quality.
        ///     Uses category bits: 192+ = Good, 64-191 = Uncertain, 0-63 = Bad.
        /// </summary>
        /// <param name="mxQuality">The raw MXAccess quality integer.</param>
        /// <returns>The mapped bridge quality value.</returns>
        public static Quality MapFromMxAccessQuality(int mxQuality)
        {
            var b = (byte)(mxQuality & 0xFF);

            // Try exact match first
            if (Enum.IsDefined(typeof(Quality), b))
                return (Quality)b;

            // Fall back to category
            if (b >= 192) return Quality.Good;
            if (b >= 64) return Quality.Uncertain;
            return Quality.Bad;
        }

        /// <summary>
        ///     Maps domain Quality to OPC UA StatusCode uint32.
        /// </summary>
        /// <param name="quality">The bridge quality value.</param>
        /// <returns>The OPC UA status code represented as a 32-bit unsigned integer.</returns>
        public static uint MapToOpcUaStatusCode(Quality quality)
        {
            return quality switch
            {
                Quality.Good => 0x00000000u, // Good
                Quality.GoodLocalOverride => 0x00D80000u, // Good_LocalOverride
                Quality.Uncertain => 0x40000000u, // Uncertain
                Quality.UncertainLastUsable => 0x40900000u,
                Quality.UncertainSensorNotAccurate => 0x40930000u,
                Quality.UncertainEuExceeded => 0x40940000u,
                Quality.UncertainSubNormal => 0x40950000u,
                Quality.Bad => 0x80000000u, // Bad
                Quality.BadConfigError => 0x80890000u,
                Quality.BadNotConnected => 0x808A0000u,
                Quality.BadDeviceFailure => 0x808B0000u,
                Quality.BadSensorFailure => 0x808C0000u,
                Quality.BadCommFailure => 0x80050000u,
                Quality.BadOutOfService => 0x808D0000u,
                Quality.BadWaitingForInitialData => 0x80320000u,
                _ => quality.IsGood() ? 0x00000000u :
                    quality.IsUncertain() ? 0x40000000u :
                    0x80000000u
            };
        }
    }
}