/**
  SLD2I module to perform point and I calculations
 */
#include <Python.h>
#include <stdio.h>
#include <sld2i.hh>

// Utilities
#define INVECTOR(obj,buf,len)										\
    do { \
        int err = PyObject_AsReadBuffer(obj, (const void **)(&buf), &len); \
        if (err < 0) return NULL; \
        len /= sizeof(*buf); \
    } while (0)

#define OUTVECTOR(obj,buf,len) \
    do { \
        int err = PyObject_AsWriteBuffer(obj, (void **)(&buf), &len); \
        if (err < 0) return NULL; \
        len /= sizeof(*buf); \
    } while (0)


/**
 * Delete a GenI object
 */
void del_sld2i(void *ptr){
	GenI* sld2i = static_cast<GenI *>(ptr);
	delete sld2i;
	return;
}

/**
 * Create a GenI as a python object by supplying arrays
 */
PyObject * new_GenI(PyObject *, PyObject *args) {
	PyObject *x_val_obj;
	PyObject *y_val_obj;
	PyObject *z_val_obj;
	PyObject *sldn_val_obj;
	PyObject *mx_val_obj;
	PyObject *my_val_obj;
	PyObject *mz_val_obj;
	Py_ssize_t n_x;
	//PyObject rlimit_obj;
	//PyObject npoints_obj;
	//PyObject nrbins_obj;
	//PyObject nphibins_obj;
	int n_pix;
	double* x_val;
	double* y_val;
	double* z_val;
	double* sldn_val;
	double* mx_val;
	double* my_val;
	double* mz_val;
	double inspin;
	double outspin;
	double stheta;

	if (!PyArg_ParseTuple(args, "iOOOOOOOddd", &n_pix, &x_val_obj, &y_val_obj, &z_val_obj, &sldn_val_obj, &mx_val_obj, &my_val_obj, &mz_val_obj, &inspin, &outspin, &stheta)) return NULL;
	OUTVECTOR(x_val_obj, x_val, n_x);
	OUTVECTOR(y_val_obj, y_val, n_x);
	OUTVECTOR(z_val_obj, z_val, n_x);
	OUTVECTOR(sldn_val_obj, sldn_val, n_x);
	OUTVECTOR(mx_val_obj, mx_val, n_x);
	OUTVECTOR(my_val_obj, my_val, n_x);
	OUTVECTOR(mz_val_obj, mz_val, n_x);
	GenI* sld2i = new GenI(n_pix,x_val,y_val,z_val,sldn_val,mx_val,my_val,mz_val,inspin,outspin,stheta);
	return PyCObject_FromVoidPtr(sld2i, del_sld2i);
}

/**
 * GenI the given input according to a given object
 */
PyObject * genicom_input(PyObject *, PyObject *args) {
	int npoints;
	PyObject *qx_obj;
	double *qx;
	PyObject *qy_obj;
	double *qy;
	PyObject *I_out_obj;
	Py_ssize_t n_out;
	double *I_out;
	PyObject *gen_obj;

	if (!PyArg_ParseTuple(args, "OiOOO",  &gen_obj, &npoints, &qx_obj, &qy_obj, &I_out_obj)) return NULL;
	OUTVECTOR(qx_obj, qx, n_out);
	OUTVECTOR(qy_obj, qy, n_out);
	OUTVECTOR(I_out_obj, I_out, n_out);

	// Sanity check
	//if(n_in!=n_out) return Py_BuildValue("i",-1);

	// Set the array pointers
	void *temp = PyCObject_AsVoidPtr(gen_obj);
	GenI* s = static_cast<GenI *>(temp);

	s->genicom(npoints, qx, qy, I_out);
	//return PyCObject_FromVoidPtr(s, del_genicom);
	return Py_BuildValue("i",1);
}


/**
 * Define module methods
 */
static PyMethodDef module_methods[] = {
	{"new_GenI", (PyCFunction)new_GenI, METH_VARARGS,
		  "Create a new GenI object"},
	{"genicom",(PyCFunction)genicom_input, METH_VARARGS,
		  "genicom the given input arrays"},
    {NULL}
};


#ifndef PyMODINIT_FUNC	/* declarations for DLL import/export */
#define PyMODINIT_FUNC void
#endif
PyMODINIT_FUNC
initsld2i(void)
{
    PyObject* m;

    m = Py_InitModule3("sld2i", module_methods,
                       "Sld2i module");
}