# -----------------------------------------------------------------------
# Copyright: 2010-2021, imec Vision Lab, University of Antwerp
#            2013-2021, CWI, Amsterdam
#
# Contact: astra@astra-toolbox.com
# Website: http://www.astra-toolbox.com/
#
# This file is part of the ASTRA Toolbox.
#
#
# The ASTRA Toolbox is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# The ASTRA Toolbox is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.
#
# -----------------------------------------------------------------------
#
# distutils: language = c++
# distutils: libraries = astra

import six
from .PyIncludes cimport *

cimport utils
from .utils import wrap_from_bytes

cimport PyProjector3DFactory
from .PyProjector3DFactory cimport CProjector3DFactory

cimport PyProjector3DManager
from .PyProjector3DManager cimport CProjector3DManager

cimport PyXMLDocument
from .PyXMLDocument cimport XMLDocument

cdef CProjector3DManager * manProj = <CProjector3DManager * >PyProjector3DManager.getSingletonPtr()

include "config.pxi"

IF HAVE_CUDA:
  cdef extern from *:
      CCudaProjector3D* dynamic_cast_cuda_projector "dynamic_cast<astra::CCudaProjector3D*>" (CProjector3D*)


def create(config):
    cdef Config * cfg = utils.dictToConfig(six.b('Projector3D'), config)
    cdef CProjector3D * proj
    proj = PyProjector3DFactory.getSingletonPtr().create(cfg.self.getAttribute(six.b('type')))
    if proj == NULL:
        del cfg
        raise Exception("Unknown Projector3D type.")
    if not proj.initialize(cfg[0]):
        del cfg
        del proj
        raise Exception("Unable to initialize Projector3D.")
    del cfg
    return manProj.store(proj)


def delete(ids):
    try:
        for i in ids:
            manProj.remove(i)
    except TypeError:
        manProj.remove(ids)


def clear():
    manProj.clear()


def info():
    six.print_(wrap_from_bytes(manProj.info()))

cdef CProjector3D * getObject(i) except NULL:
    cdef CProjector3D * proj = manProj.get(i)
    if proj == NULL:
        raise Exception("Projector not initialized.")
    if not proj.isInitialized():
        raise Exception("Projector not initialized.")
    return proj


def projection_geometry(i):
    cdef CProjector3D * proj = getObject(i)
    cdef Config * cfg = proj.getProjectionGeometry().getConfiguration()
    dct = utils.configToDict(cfg)
    del cfg
    return dct


def volume_geometry(i):
    cdef CProjector3D * proj = getObject(i)
    cdef Config * cfg = proj.getVolumeGeometry().getConfiguration()
    dct = utils.configToDict(cfg)
    del cfg
    return dct


def weights_single_ray(i, projection_index, detector_index):
    raise Exception("Not yet implemented")


def weights_projection(i, projection_index):
    raise Exception("Not yet implemented")


def splat(i, row, col):
    raise Exception("Not yet implemented")

def is_cuda(i):
    cdef CProjector3D * proj = getObject(i)
    IF HAVE_CUDA==True:
      cdef CCudaProjector3D * cudaproj = NULL
      cudaproj = dynamic_cast_cuda_projector(proj)
      if cudaproj==NULL:
          return False
      else:
          return True
    ELSE:
        return False