from __future__ import print_function, unicode_literals
import argparse
import os
import uuid

try:
    import salome
    from salome.geom import geomBuilder
    from salome.smesh import smeshBuilder
except ImportError:
    raise ImportError("SALOME import failed. Are you running inside salome?")


IGES_IGNORE_UNITS = False


def main(args):
    salome.salome_init()
    geom = geomBuilder.New(salome.myStudy)
    smesh = smeshBuilder.New(salome.myStudy)

    root_shape = geom.ImportIGES(args.input, IGES_IGNORE_UNITS)
    faces = geom.ExtractShapes(root_shape, geom.ShapeType["FACE"])
    print ("Number of extracted faces: {}".format(len(faces)))

    face_list = {}
    for face in faces:
        point_list = []
        for point in geom.ExtractShapes(face, geom.ShapeType["VERTEX"], isSorted=False):
            coords = geom.PointCoordinates(point)
            point_list.append(coords)
        face_name = str(uuid.uuid4())
        face_list[face_name] = point_list

    with open(args.output, "w") as f:
        f.write('<X3D version="3.2" profile="CADInterchange" xmlns="">\n')
        f.write('   <Scene>\n')
        f.write('       <CADPart name="{}">\n'.format(args.input))

        for face_name, point_list in face_list.iteritems():
            f.write('           <CADFace name="{}">\n'.format(face_name))
            f.write('               <Shape containerField="shape">\n')
            f.write('                   <Appearance>\n')
            f.write('                       <Material diffuseColor="0.8 0.8 0.8"></Material>\n')
            f.write('                   </Appearance>\n')

            coord_index = range(len(point_list))  # [0, 1, ... , n]
            coords = [coord for point in point_list for coord in point] # [x1, y1, z1, x2, y2, z2, ...]

            f.write('                   <IndexedFaceSet coordIndex="{} -1">\n'.format(
                " ".join(map(str, coord_index))))
            f.write('                       <Coordinate point="{}"></Coordinate>\n'.format(
                " ".join(map(str, coords))))
            f.write('                   </IndexedFaceSet>\n')
            f.write('               </Shape>\n')
            f.write('           </CADFace>\n')
        f.write('       </CADPart>\n')
        f.write('   </Scene>\n')
        f.write('</X3D>\n')

    print ("Conversion ended. Number of faces: {}. Number of vertices: {}".format(
        len(face_list), ""))

if __name__ == "__main__":
    parser = argparse.ArgumentParser(prog='prepare-part', description='')
    parser.add_argument("input")
    parser.add_argument("output")
    parser.set_defaults(func=main)
    args = parser.parse_args()
    args.func(args)