using GeoVLog.Core.Parsers;
using System;
using System.Text;
using Xunit;

namespace GeoVLog.Tests.Parsers;

public class GpsParserTests
{
    [Fact]
    [Trait("Category", "Core")]
    public void ParsesValidRmc()
    {
        var msg = Encoding.ASCII.GetBytes("$GPRMC,103021.00,A,1754.84632,S,03105.65138,E,0.009,,061222,,,D*67");
        var timestamp = new DateTime(2022, 12, 6, 10, 30, 21, DateTimeKind.Utc);
        var ok = GpsParser.TryParse(msg, timestamp, out var parsed);

        Assert.True(ok);
        Assert.Equal("$GPRMC", parsed.SentenceId);
        Assert.Equal(timestamp, parsed.TimestampUtc);
        Assert.Equal(-17.914105, parsed.LatitudeDeg!.Value, 6);
        Assert.Equal(31.094189, parsed.LongitudeDeg!.Value, 6);
        Assert.Equal(0.009, parsed.SpeedKnots!.Value, 3);
        Assert.Null(parsed.AltitudeM);
        Assert.Equal('D', parsed.Mode);
    }

    [Fact]
    [Trait("Category", "Core")]
    public void ParsesValidGga()
    {
        var msg = Encoding.ASCII.GetBytes("$GPGGA,103021.00,1754.84632,S,03105.65138,E,2,11,0.74,1496.3,M,1.0,M,,0000*4A");
        var timestamp = new DateTime(2022, 12, 6, 10, 30, 21, DateTimeKind.Utc);
        var ok = GpsParser.TryParse(msg, timestamp, out var parsed);

        Assert.True(ok);
        Assert.Equal("$GPGGA", parsed.SentenceId);
        Assert.Equal(timestamp, parsed.TimestampUtc);
        Assert.Equal(1496.3, parsed.AltitudeM!.Value, 1);
        Assert.Equal(11, parsed.NumSatellites);
        Assert.Equal(0.74f, parsed.Hdop!.Value, 2);
    }

    [Fact]
    [Trait("Category", "Core")]
    public void RejectsInvalidChecksum()
    {
        var msg = Encoding.ASCII.GetBytes("$GPRMC,103021.00,A,1754.84632,S,03105.65138,E,0.009,,061222,,,D*00");
        Assert.False(GpsParser.TryParse(msg, DateTime.UtcNow, out _));
    }
}