using OCC.BRepBuilderAPI;
using OCC.TopoDS;
using OCC.gp;
using OCC.BRep;
using OCC.Geom;
using OCC.GeomAbs;
using UnityEngine;

public static class BRepToolCurveTester
{
    public static void TestBRepToolCurve()
    {
        // Step 1: Create a basic line edge
        gp_Pnt p1 = new gp_Pnt(0, 0, 0);
        gp_Pnt p2 = new gp_Pnt(10, 0, 0);

        // Create a Geom_Line object
        Geom_Line geomLine = new Geom_Line(p1, new gp_Dir(p2.XYZ().Subtracted(p1.XYZ())));

        // Print the values from Geom_Line
        gp_Lin lineGeometry = geomLine.Lin();
        gp_Pnt origin = lineGeometry.Location();
        gp_Dir direction = lineGeometry.Direction();
        Debug.Log($"Geom_Line Origin: ({origin.X():F2}, {origin.Y():F2}, {origin.Z():F2})");
        Debug.Log($"Geom_Line Direction: ({direction.X():F2}, {direction.Y():F2}, {direction.Z():F2})");

        // Use BRepBuilderAPI_MakeEdge to create a TopoDS_Edge
        BRepBuilderAPI_MakeEdge edgeBuilder = new BRepBuilderAPI_MakeEdge(geomLine);
        TopoDS_Edge lineEdge = edgeBuilder.Edge();

        // Step 2: Extract the curve from the edge using BRep_Tool.Curve
        double first = 0, last = 0;
        Geom_Curve extractedCurve = BRep_Tool.Curve(lineEdge, ref first, ref last);

        // Step 3: Validate the extracted curve
        if (extractedCurve == null)
        {
            Debug.LogError("BRep_Tool.Curve failed to extract the curve from the edge.");
            return;
        }

        // Step 4: Print out the curve details for verification
        gp_Pnt startPoint = extractedCurve.Value(first);
        gp_Pnt endPoint = extractedCurve.Value(last);

        Debug.Log($"Start Point: ({startPoint.X():F2}, {startPoint.Y():F2}, {startPoint.Z():F2})");
        Debug.Log($"End Point: ({endPoint.X():F2}, {endPoint.Y():F2}, {endPoint.Z():F2})");

        // Check if the extracted curve is indeed a line
        if (extractedCurve is Geom_Line)
        {
            Debug.Log("The extracted curve is a line.");
        }
        else
        {
            Debug.Log($"The extracted curve is of type: {extractedCurve.GetType().Name}");
        }
    }
}