using System;
using System.IO;

public static class HardnessSymbolArrowTests
{
    public static int Main()
    {
        try
        {
            AnnotationArrowsUseDimensionArrowSize();
            Console.WriteLine("Annotation arrow size tests passed.");
            return 0;
        }
        catch (Exception ex)
        {
            Console.Error.WriteLine(ex.Message);
            return 1;
        }
    }

    private static void AnnotationArrowsUseDimensionArrowSize()
    {
        var sourcePath = Path.Combine("Cad", "FeatureDrivenDrawer.cs");
        var source = File.ReadAllText(sourcePath);

        if (!source.Contains("public const double DimensionArrowSize = 2.5;"))
        {
            throw new InvalidOperationException(sourcePath + ": dimension arrow size must be controlled by one shared 2.5 variable.");
        }

        if (!source.Contains("TrySetDimProp(dim, \"Dimasz\", DimensionArrowSize);"))
        {
            throw new InvalidOperationException(sourcePath + ": dimension Dimasz must use DimensionArrowSize.");
        }

        var methodStart = source.IndexOf("public static void DrawHardnessSymbol", StringComparison.Ordinal);
        if (methodStart < 0)
        {
            throw new InvalidOperationException(sourcePath + ": DrawHardnessSymbol method was not found.");
        }

        var methodEnd = source.IndexOf("/// <summary>", methodStart, StringComparison.Ordinal);
        if (methodEnd < 0)
        {
            methodEnd = source.Length;
        }

        var method = source.Substring(methodStart, methodEnd - methodStart);
        if (!method.Contains("var leader = new Leader()") ||
            !method.Contains("ctx.Style?.Apply(leader, DrawingStyleManager.Role.Dimension)") ||
            !method.Contains("DrawLeaderArrowHead(ctx, p1, p2, 4)") ||
            method.Contains("double arrowLength = 5.0") ||
            method.Contains("double arrowWidth = 1.5"))
        {
            throw new InvalidOperationException(sourcePath + ": hardness symbol arrow must use the shared dimension arrow size.");
        }

        RequireMethodUsesSharedArrow(source, sourcePath, "public static void DrawSpecialInnerHoleLeader");
        RequireMethodUsesSharedArrow(source, sourcePath, "public static void DrawSpecialHBLeaderToTop");
        RequireFileMethodUsesSharedArrow(
            Path.Combine("Cad", "BlockRawFreeForgeNoRoundHeadDrawer.cs"),
            "private static void DrawSpecialHBLeaderToTop",
            "FeatureDrivenDrawer.DrawLeaderArrowHead(ctx, p1, p2, 7)");
        RequireFileMethodUsesSharedArrow(
            Path.Combine("Cad", "BlockRawFreeForgeRoundHeadDrawer.cs"),
            "private static void DrawSpecialHBLeaderToTop",
            "FeatureDrivenDrawer.DrawLeaderArrowHead(ctx, p1, p2, 7)");
        RequireFileMethodUsesSharedArrow(
            Path.Combine("Cad", "RingMachinedRollingDrawer.cs"),
            "private static void DrawSpecialInnerHoleLeader",
            "FeatureDrivenDrawer.DrawLeaderArrowHead(ctx, p1, p2, 7)");
    }

    private static void RequireMethodUsesSharedArrow(string source, string sourcePath, string signature)
    {
        var methodStart = source.IndexOf(signature, StringComparison.Ordinal);
        if (methodStart < 0)
        {
            throw new InvalidOperationException(sourcePath + ": " + signature + " method was not found.");
        }

        var methodEnd = source.IndexOf("public static void", methodStart + signature.Length, StringComparison.Ordinal);
        if (methodEnd < 0)
        {
            methodEnd = source.IndexOf("private static void", methodStart + signature.Length, StringComparison.Ordinal);
        }
        if (methodEnd < 0)
        {
            methodEnd = source.Length;
        }

        var method = source.Substring(methodStart, methodEnd - methodStart);
        if (!method.Contains("DrawLeaderArrowHead(ctx, p1, p2, 7)"))
        {
            throw new InvalidOperationException(sourcePath + ": " + signature + " must draw its arrow with DimensionArrowSize.");
        }
    }

    private static void RequireFileMethodUsesSharedArrow(string sourcePath, string signature, string expectedCall)
    {
        var source = File.ReadAllText(sourcePath);
        var methodStart = source.IndexOf(signature, StringComparison.Ordinal);
        if (methodStart < 0)
        {
            throw new InvalidOperationException(sourcePath + ": " + signature + " method was not found.");
        }

        var methodEnd = source.IndexOf("private static void", methodStart + signature.Length, StringComparison.Ordinal);
        if (methodEnd < 0)
        {
            methodEnd = source.Length;
        }

        var method = source.Substring(methodStart, methodEnd - methodStart);
        if (!method.Contains(expectedCall))
        {
            throw new InvalidOperationException(sourcePath + ": " + signature + " must draw its arrow with DimensionArrowSize.");
        }
    }
}