using SSPCTester.Devices.Interfaces;

namespace SSPCTester.Devices.Config;

public static class DaqChannelOptionsNormalizer
{
    public const int ChannelSlots = 8;

    public static List<DaqChannelOptions> Normalize(IEnumerable<DaqChannelOptions>? channels)
    {
        var byPhysicalChannel = (channels ?? Enumerable.Empty<DaqChannelOptions>())
            .Where(x => x.PhysicalChannel is >= 0 and < ChannelSlots)
            .GroupBy(x => x.PhysicalChannel)
            .ToDictionary(x => x.Key, x => x.First());

        var normalized = new List<DaqChannelOptions>(ChannelSlots);
        for (int physicalChannel = 0; physicalChannel < ChannelSlots; physicalChannel++)
        {
            byPhysicalChannel.TryGetValue(physicalChannel, out var source);
            normalized.Add(new DaqChannelOptions
            {
                PhysicalChannel = physicalChannel,
                Role = NormalizeRole(source?.Role),
                Name = string.IsNullOrWhiteSpace(source?.Name) ? $"CH{physicalChannel}" : source.Name,
                Scale = source?.Scale ?? 1,
                Offset = source?.Offset ?? 0,
                IsCalibrated = source?.IsCalibrated ?? false
            });
        }

        return normalized;
    }

    public static string NormalizeRole(string? role) =>
        Enum.TryParse<DaqChannelRole>(role, ignoreCase: true, out var parsed)
            ? parsed.ToString()
            : nameof(DaqChannelRole.Unconfigured);
}