/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file source/blender/freestyle/intern/python/Iterator/BPy_orientedViewEdgeIterator.cpp
 *  \ingroup freestyle
 */

#include "BPy_orientedViewEdgeIterator.h"

#include "../BPy_Convert.h"

#ifdef __cplusplus
extern "C" {
#endif

///////////////////////////////////////////////////////////////////////////////////////////

//------------------------INSTANCE METHODS ----------------------------------

PyDoc_STRVAR(orientedViewEdgeIterator_doc,
"Class hierarchy: :class:`Iterator` > :class:`orientedViewEdgeIterator`\n"
"\n"
"Class representing an iterator over oriented ViewEdges around a\n"
":class:`ViewVertex`.  This iterator allows a CCW iteration (in the image\n"
"plane).  An instance of an orientedViewEdgeIterator can only be\n"
"obtained from a ViewVertex by calling edges_begin() or edges_end().\n"
"\n"
".. method:: __init__()\n"
"\n"
"   Default constructor.\n"
"\n"
".. method:: __init__(iBrother)\n"
"\n"
"   Copy constructor.\n"
"\n"
"   :arg iBrother: An orientedViewEdgeIterator object.\n"
"   :type iBrother: :class:`orientedViewEdgeIterator`");

static int orientedViewEdgeIterator_init(BPy_orientedViewEdgeIterator *self, PyObject *args, PyObject *kwds)
{
	static const char *kwlist[] = {"brother", NULL};
	PyObject *brother = 0;

	if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O!", (char **)kwlist, &orientedViewEdgeIterator_Type, &brother))
		return -1;
	if (!brother) {
		self->ove_it = new ViewVertexInternal::orientedViewEdgeIterator();
		self->at_start = true;
		self->reversed = false;
	}
	else {
		self->ove_it = new ViewVertexInternal::orientedViewEdgeIterator(*(((BPy_orientedViewEdgeIterator *)brother)->ove_it));
		self->at_start = ((BPy_orientedViewEdgeIterator *)brother)->at_start;
		self->reversed = ((BPy_orientedViewEdgeIterator *)brother)->reversed;
	}
	self->py_it.it = self->ove_it;
	return 0;
}

static PyObject *orientedViewEdgeIterator_iter(BPy_orientedViewEdgeIterator *self)
{
	Py_INCREF(self);
	self->at_start = true;
	return (PyObject *) self;
}

static PyObject *orientedViewEdgeIterator_iternext(BPy_orientedViewEdgeIterator *self)
{
	if (self->reversed) {
		if (self->ove_it->isBegin()) {
			PyErr_SetNone(PyExc_StopIteration);
			return NULL;
		}
		self->ove_it->decrement();
	}
	else {
		if (self->ove_it->isEnd()) {
			PyErr_SetNone(PyExc_StopIteration);
			return NULL;
		}
		if (self->at_start)
			self->at_start = false;
		else {
			self->ove_it->increment();
			if (self->ove_it->isEnd()) {
				PyErr_SetNone(PyExc_StopIteration);
				return NULL;
			}
		}
	}
	ViewVertex::directedViewEdge *dve = self->ove_it->operator->();
	return BPy_directedViewEdge_from_directedViewEdge(*dve);
}

/*----------------------orientedViewEdgeIterator get/setters ----------------------------*/

PyDoc_STRVAR(orientedViewEdgeIterator_object_doc,
"The oriented ViewEdge (i.e., a tuple of the pointed ViewEdge and a boolean\n"
"value) currently pointed to by this iterator. If the boolean value is true,\n"
"the ViewEdge is incoming.\n"
"\n"
":type: (:class:`directedViewEdge`, bool)");

static PyObject *orientedViewEdgeIterator_object_get(BPy_orientedViewEdgeIterator *self, void *UNUSED(closure))
{
	if (self->ove_it->isEnd()) {
		PyErr_SetString(PyExc_RuntimeError, "iteration has stopped");
		return NULL;
	}
	return BPy_directedViewEdge_from_directedViewEdge(self->ove_it->operator*());
}

static PyGetSetDef BPy_orientedViewEdgeIterator_getseters[] = {
	{(char *)"object", (getter)orientedViewEdgeIterator_object_get, (setter)NULL,
	                   (char *)orientedViewEdgeIterator_object_doc, NULL},
	{NULL, NULL, NULL, NULL, NULL}  /* Sentinel */
};

/*-----------------------BPy_orientedViewEdgeIterator type definition ------------------------------*/

PyTypeObject orientedViewEdgeIterator_Type = {
	PyVarObject_HEAD_INIT(NULL, 0)
	"orientedViewEdgeIterator",     /* tp_name */
	sizeof(BPy_orientedViewEdgeIterator), /* tp_basicsize */
	0,                              /* tp_itemsize */
	0,                              /* tp_dealloc */
	0,                              /* tp_print */
	0,                              /* tp_getattr */
	0,                              /* tp_setattr */
	0,                              /* tp_reserved */
	0,                              /* tp_repr */
	0,                              /* tp_as_number */
	0,                              /* tp_as_sequence */
	0,                              /* tp_as_mapping */
	0,                              /* tp_hash  */
	0,                              /* tp_call */
	0,                              /* tp_str */
	0,                              /* tp_getattro */
	0,                              /* tp_setattro */
	0,                              /* tp_as_buffer */
	Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
	orientedViewEdgeIterator_doc,   /* tp_doc */
	0,                              /* tp_traverse */
	0,                              /* tp_clear */
	0,                              /* tp_richcompare */
	0,                              /* tp_weaklistoffset */
	(getiterfunc)orientedViewEdgeIterator_iter, /* tp_iter */
	(iternextfunc)orientedViewEdgeIterator_iternext, /* tp_iternext */
	0,                              /* tp_methods */
	0,                              /* tp_members */
	BPy_orientedViewEdgeIterator_getseters, /* tp_getset */
	&Iterator_Type,                 /* tp_base */
	0,                              /* tp_dict */
	0,                              /* tp_descr_get */
	0,                              /* tp_descr_set */
	0,                              /* tp_dictoffset */
	(initproc)orientedViewEdgeIterator_init, /* tp_init */
	0,                              /* tp_alloc */
	0,                              /* tp_new */
};

///////////////////////////////////////////////////////////////////////////////////////////

#ifdef __cplusplus
}
#endif
