using System.Collections;
using System.Text.Json;
using LmxFakeProxy.Grpc;

namespace LmxFakeProxy;

public class TagMapper
{
    private readonly string _prefix;

    public TagMapper(string prefix)
    {
        _prefix = prefix;
    }

    public string ToOpcNodeId(string lmxTag) => $"{_prefix}{lmxTag}";

    public static object ParseWriteValue(string value)
    {
        if (double.TryParse(value, System.Globalization.NumberStyles.Float,
            System.Globalization.CultureInfo.InvariantCulture, out var d))
            return d;
        if (bool.TryParse(value, out var b))
            return b;
        return value;
    }

    public static string MapQuality(uint statusCode)
    {
        if (statusCode == 0) return "Good";
        if ((statusCode & 0x80000000) != 0) return "Bad";
        return "Uncertain";
    }

    public static string FormatValue(object? value)
    {
        if (value is null) return string.Empty;
        if (value is Array or IList)
            return JsonSerializer.Serialize(value);
        return value.ToString() ?? string.Empty;
    }

    public static VtqMessage ToVtqMessage(string tag, object? value, DateTime timestampUtc, uint statusCode)
    {
        return new VtqMessage
        {
            Tag = tag,
            Value = FormatValue(value),
            TimestampUtcTicks = timestampUtc.Ticks,
            Quality = MapQuality(statusCode)
        };
    }
}