using OpenNest.CNC;
using OpenNest.Geometry;
using OpenNest.Posts.Cincinnati;

namespace OpenNest.Tests.Cincinnati;

public class HoleCallOutputCharacterizationTests
{
    [Theory]
    [InlineData("part", true)]
    [InlineData("part", false)]
    [InlineData("inline-sheet", true)]
    [InlineData("inline-sheet", false)]
    [InlineData("grouped-sheet", true)]
    [InlineData("grouped-sheet", false)]
    public void SingleHole_NullMap_FirstAndLastFeature_HasExactOutput(string route, bool lineNumbers)
    {
        var config = CreateConfig(lineNumbers);
        var program = CreateProgram(CreateCall(7, -12.34567, 6.78901));
        var write = CreateWriter(route, config, null);
        using var output = new StringWriter { NewLine = "\n" };

        write(output, program);

        var body = Lines(
            lineNumbers ? "N73 G52 X-12.35 Y6.79" : "G52 X-12.35 Y6.79",
            "M98 P7",
            "G52 X0 Y0"
        );
        Assert.Equal(WrapOutput(route, body), output.ToString());
    }

    [Theory]
    [InlineData("part", true)]
    [InlineData("part", false)]
    [InlineData("inline-sheet", true)]
    [InlineData("inline-sheet", false)]
    [InlineData("grouped-sheet", true)]
    [InlineData("grouped-sheet", false)]
    public void MultipleHoles_LiveMap_FirstAndLaterIndices_HaveExactOutput(string route, bool lineNumbers)
    {
        var config = CreateConfig(lineNumbers);
        config.InteriorM47 = M47Mode.None;
        var mapping = new Dictionary<int, int> { [7] = 900 };
        var write = CreateWriter(route, config, mapping);
        // The caller-owned map is consulted when writing, not copied at construction.
        mapping[7] = 901;
        mapping[9] = 0;
        var program = CreateProgram(
            CreateCall(7, -12.34567, 6.78901),
            CreateCall(8, 0.00499, -0.006),
            CreateCall(9, 1.1, -2.2)
        );
        using var output = new StringWriter { NewLine = "\n" };

        write(output, program);

        var body = Lines(
            lineNumbers ? "N73 G52 X-12.35 Y6.79" : "G52 X-12.35 Y6.79",
            "M98 P901",
            "G52 X0 Y0",
            "M47",
            lineNumbers ? "N1002 G52 X0 Y-0.01" : "G52 X0 Y-0.01",
            "M98 P8",
            "G52 X0 Y0",
            "M47",
            lineNumbers ? "N1003 G52 X1.1 Y-2.2" : "G52 X1.1 Y-2.2",
            "M98 P0",
            "G52 X0 Y0"
        );
        Assert.Equal(WrapOutput(route, body), output.ToString());
    }

    [Theory]
    [InlineData("part", true)]
    [InlineData("part", false)]
    [InlineData("inline-sheet", true)]
    [InlineData("inline-sheet", false)]
    [InlineData("grouped-sheet", true)]
    [InlineData("grouped-sheet", false)]
    public void HoleBetweenOrdinaryFeatures_PreservesFeatureSequence(string route, bool lineNumbers)
    {
        var config = CreateConfig(lineNumbers);
        var program = CreateProgram(
            new RapidMove(1, 1),
            new LinearMove(2, 1),
            new LinearMove(1, 1),
            CreateCall(7, -12.34567, 6.78901),
            new RapidMove(3, 3),
            new LinearMove(4, 3),
            new LinearMove(3, 3)
        );
        var write = CreateWriter(route, config, new Dictionary<int, int>());
        using var output = new StringWriter { NewLine = "\n" };

        write(output, program);

        var body = Lines(lineNumbers ? "N73 G0 X1 Y1" : "G0 X1 Y1");
        if (route != "part")
            body += Lines("( PART: Sample )");
        body += Lines(
            "G84",
            "G1 X2 Y1 F#148",
            "G1 X1 Y1",
            "M35",
            "M47",
            lineNumbers ? "N1002 G52 X-12.35 Y6.79" : "G52 X-12.35 Y6.79",
            "M98 P7",
            "G52 X0 Y0",
            "M47",
            lineNumbers ? "N1003 G0 X3 Y3" : "G0 X3 Y3",
            "G84",
            "G1 X4 Y3 F#148",
            "G1 X3 Y3",
            "M35"
        );
        Assert.Equal(WrapOutput(route, body), output.ToString());
    }

    [Theory]
    [InlineData("part")]
    [InlineData("inline-sheet")]
    [InlineData("grouped-sheet")]
    public void ConfigChanges_AreLiveExceptConstructionTimePrecision(string route)
    {
        var config = CreateConfig(false);
        var write = CreateWriter(route, config, null);
        var program = CreateProgram(CreateCall(7, -12.34567, 6.78901));
        config.UseLineNumbers = true;
        config.FeatureLineNumberStart = 87;
        config.PostedAccuracy = 5;
        using var first = new StringWriter { NewLine = "\n" };

        write(first, program);

        Assert.Equal(
            WrapOutput(route, Lines("N87 G52 X-12.35 Y6.79", "M98 P7", "G52 X0 Y0")),
            first.ToString()
        );
        config.UseLineNumbers = false;
        using var second = new StringWriter { NewLine = "\n" };
        write(second, program);
        Assert.Equal(
            WrapOutput(route, Lines("G52 X-12.35 Y6.79", "M98 P7", "G52 X0 Y0")),
            second.ToString()
        );
    }

    [Theory]
    [InlineData("part")]
    [InlineData("inline-sheet")]
    [InlineData("grouped-sheet")]
    public void HoleWriteFailure_PropagatesWithoutResetOrLaterFeature(string route)
    {
        var write = CreateWriter(route, CreateConfig(true), null);
        var program = CreateProgram(CreateCall(7, -12.34567, 6.78901), CreateCall(8, 1, 2));
        using var output = new RejectHoleCallWriter();

        var error = Assert.Throws<IOException>(() => write(output, program));

        Assert.Same(output.Failure, error);
        Assert.Equal(Header(route) + Lines("N73 G52 X-12.35 Y6.79"), output.ToString());
    }

    private static CincinnatiPostConfig CreateConfig(bool lineNumbers) => new()
    {
        PostedAccuracy = 2,
        FeatureLineNumberStart = 73,
        UseLineNumbers = lineNumbers,
        PalletExchange = PalletMode.None,
        ProcessParameterMode = G89Mode.Explicit,
        KerfCompensation = KerfMode.PreApplied,
        UseAntiDive = false,
    };

    private static Action<TextWriter, Program> CreateWriter(
        string route,
        CincinnatiPostConfig config,
        Dictionary<int, int>? mapping
    )
    {
        if (route == "part")
        {
            var writer = new CincinnatiPartSubprogramWriter(config, mapping);
            return (output, program) => writer.Write(output, program, "Sample", 201, "", "", 10);
        }

        var sheetWriter = new CincinnatiSheetWriter(config, new ProgramVariableManager(), mapping);
        Dictionary<(int, long), int>? partMapping = route == "grouped-sheet" ? new() : null;
        return (output, program) =>
        {
            var plate = new Plate(48, 96);
            plate.Parts.Add(new Part(new Drawing("Sample", program)));
            sheetWriter.Write(output, plate, "Nest", 1, 101, "", "", partMapping);
        };
    }

    private static Program CreateProgram(params ICode[] codes)
    {
        var program = new Program();
        program.Codes.AddRange(codes);
        foreach (var call in codes.OfType<SubProgramCall>())
            program.SubPrograms[call.Id] = call.Program;
        return program;
    }

    private static SubProgramCall CreateCall(int id, double x, double y)
    {
        var hole = new Program();
        hole.Codes.Add(new LinearMove(1, 0) { Layer = LayerType.Leadin });
        hole.Codes.Add(new ArcMove(new Vector(1, 0), Vector.Zero, RotationType.CW));
        hole.Mode = Mode.Incremental;
        return new SubProgramCall { Id = id, Program = hole, Offset = new Vector(x, y) };
    }

    // Literal snapshots deliberately do not call the production emitter/formatter.
    private static string WrapOutput(string route, string body) => Header(route) + body +
        (route == "part" ? Lines("M99 (END OF Sample)") : Lines("M42", "M99 (END OF Nest.001)"));

    private static string Header(string route)
    {
        if (route == "part")
            return Lines("(*****************************************************)", ":201", "( PART: Sample )");

        return Lines(
            "(*****************************************************)",
            "( START OF Nest.001 )",
            ":101",
            "( Layout 1 )",
            "( SHEET NAME = 48 X 96 )",
            "( Total parts on sheet = 1 )",
            "#110=48 (SHEET WIDTH FOR CUTOFFS)",
            "#111=96 (SHEET LENGTH FOR CUTOFFS)",
            "M42",
            "N10000",
            "G92 X#5021 Y#5022",
            "M98 P100 (Variable Declaration)",
            "G90",
            "M47",
            "GOTO1( Goto Feature )"
        );
    }

    private static string Lines(params string[] lines) => string.Join("\n", lines) + "\n";

    private sealed class RejectHoleCallWriter : StringWriter
    {
        public readonly IOException Failure = new("Rejected hole call");

        public RejectHoleCallWriter() => NewLine = "\n";

        public override void WriteLine(string? value)
        {
            if (value == "M98 P7")
                throw Failure;
            base.WriteLine(value);
        }
    }
}