cyphesis/rulesets/Python_API.cpp

// This file may be redistributed and modified only under the terms of
// the GNU General Public License (See COPYING for details).
// Copyright (C) 2000 Alistair Riddoch

#include "Python_API.h"

#include "Py_Object.h"
#include "Py_Thing.h"
#include "Py_Mind.h"
#include "Py_Map.h"
#include "Py_Location.h"
#include "Py_Vector3D.h"
#include "Py_Quaternion.h"
#include "Py_WorldTime.h"
#include "Py_World.h"
#include "Py_Operation.h"
#include "Py_Oplist.h"
#include "Py_Optime.h"

#include "PythonThingScript.h"
#include "PythonMindScript.h"
#include "World.h"
#include "Entity.h"
#include "BaseMind.h"

#include "common/globals.h"
#include "common/const.h"
#include "common/debug.h"
#include "common/log.h"

#include "common/Tick.h"
#include "common/Burn.h"
#include "common/Chop.h"
#include "common/Cut.h"
#include "common/Setup.h"
#include "common/Eat.h"
#include "common/Nourish.h"

#include <Atlas/Objects/Operation/Create.h>
#include <Atlas/Objects/Operation/Look.h>
#include <Atlas/Objects/Operation/Move.h>
#include <Atlas/Objects/Operation/Set.h>
#include <Atlas/Objects/Operation/Sight.h>
#include <Atlas/Objects/Operation/Talk.h>
#include <Atlas/Objects/Operation/Touch.h>
#include <Atlas/Objects/Operation/Info.h>

#include <cstdio>

static const bool debug_flag = false;

typedef struct {
    PyObject_HEAD
} FunctionObject;

static void Function_dealloc(FunctionObject * self)
{
    PyMem_DEL(self);
}

static PyObject * log_debug(PyObject * self, PyObject * args, PyObject * kwds)
{
    Py_INCREF(Py_None);
    return Py_None;
}

PyTypeObject log_debug_type = {
        PyObject_HEAD_INIT(&PyType_Type)
        0,
        "Function",
        sizeof(FunctionObject),
        0,
        /* methods */
        (destructor)Function_dealloc,
        0,              /* tp_print */
        0,              /* tp_getattr */
        0,              /* tp_setattr */
        0,              /* tp_compare */
        0,              /* tp_repr */
        0,              /* tp_as_number */
        0,              /* tp_as_sequence */
        0,              /* tp_as_mapping */
        0,              /* tp_hash */
        log_debug,      /* tp_call */
};

//////////////////////////////////////////////////////////////////////////
// Logger replaces sys.stdout and sys.stderr so the nothing goes to output
//////////////////////////////////////////////////////////////////////////

typedef struct {
    PyObject_HEAD
} PyLogger;

static PyObject * PyLogger_write(PyObject * self, PyObject * args)
{
    char * mesg;
    if (!PyArg_ParseTuple(args, "s", &mesg)) {
        return 0;
    }

    log(SCRIPT, mesg);

    Py_INCREF(Py_None);
    return Py_None;
}

static PyObject * PyErrorLogger_write(PyObject * self, PyObject * args)
{
    char * mesg;
    if (!PyArg_ParseTuple(args, "s", &mesg)) {
        return 0;
    }

    log(SCRIPT, mesg);

    Py_INCREF(Py_None);
    return Py_None;
}

static PyMethodDef PyLogger_methods[] = {
    {"write",     PyLogger_write,       METH_VARARGS},
    {NULL,        NULL}
};

static PyMethodDef PyErrorLogger_methods[] = {
    {"write",     PyErrorLogger_write,       METH_VARARGS},
    {NULL,        NULL}
};

static void PyLogger_dealloc(PyObject * self)
{
    PyMem_DEL(self);
}

static PyObject * PyLogger_getattr(PyObject * self, char *name)
{
    return Py_FindMethod(PyLogger_methods, self, name);
}

static PyObject * PyErrorLogger_getattr(PyObject * self, char *name)
{
    return Py_FindMethod(PyErrorLogger_methods, self, name);
}

PyTypeObject PyLogger_Type = {
        PyObject_HEAD_INIT(&PyType_Type)
        0,                   // ob_size
        "Logger",            // tp_name
        sizeof(PyLogger),    // tp_basicsize
        0,                   // tp_itemsize
        //  methods 
        PyLogger_dealloc,    // tp_dealloc
        0,                   // tp_print
        PyLogger_getattr,    // tp_getattr
        0,                   // tp_setattr
        0,                   // tp_compare
        0,                   // tp_repr
        0,                   // tp_as_number
        0,                   // tp_as_sequence
        0,                   // tp_as_mapping
        0,                   // tp_hash
};

PyTypeObject PyErrorLogger_Type = {
        PyObject_HEAD_INIT(&PyType_Type)
        0,                   // ob_size
        "ErrorLogger",            // tp_name
        sizeof(PyLogger),    // tp_basicsize
        0,                   // tp_itemsize
        //  methods 
        PyLogger_dealloc,    // tp_dealloc
        0,                   // tp_print
        PyErrorLogger_getattr,    // tp_getattr
        0,                   // tp_setattr
        0,                   // tp_compare
        0,                   // tp_repr
        0,                   // tp_as_number
        0,                   // tp_as_sequence
        0,                   // tp_as_mapping
        0,                   // tp_hash
};

//////////////////////////////////////////////////////////////////////////
// dictlist
//////////////////////////////////////////////////////////////////////////

static PyObject * dictlist_remove_value(PyObject * self, PyObject * args, PyObject * kwds)
{
    PyObject * dict;
    PyEntity * item;
    long remove_empty_key = 1;
    if (!PyArg_ParseTuple(args, "OO|i", &dict, &item, &remove_empty_key)) {
        return NULL;
    }
    int flag = 0;
    if (!PyDict_Check(dict)) {
        PyErr_SetString(PyExc_TypeError, "Trying to set item in not dictlist");
        return NULL;
    }
    PyObject * keys = PyDict_Keys(dict);
    PyObject * values = PyDict_Values(dict);

    if ((keys == NULL) || (values == NULL)) {
        PyErr_SetString(PyExc_RuntimeError, "Error getting keys from dictlist");
        return NULL;
    }
    int i, size = PyList_Size(keys);
    for(i = 0; i < size; i++) {
        PyObject * value = PyList_GetItem(values, i);
        PyObject * key = PyList_GetItem(keys, i);
        int j, lsize = PyList_Size(value);
        for(j = 0; j < lsize; j++) {
            PyEntity * entry = (PyEntity*)PyList_GetItem(value, j);
            if (entry->m_entity == item->m_entity) {
                flag = 1;
                PyList_SetSlice(value, j, j+1, NULL);
                j--; lsize--;
                if ((remove_empty_key !=0) && (PyList_Size(value) == 0)) {
                    PyDict_DelItem(dict, key);
                }
            }
        }
    }
    Py_DECREF(keys);
    Py_DECREF(values);
    return PyInt_FromLong(flag);
}

PyTypeObject dictlist_remove_value_type = {
        PyObject_HEAD_INIT(&PyType_Type)
        0,
        "Function",
        sizeof(FunctionObject),
        0,
        /* methods */
        (destructor)Function_dealloc,
        0,              /* tp_print */
        0,              /* tp_getattr */
        0,              /* tp_setattr */
        0,              /* tp_compare */
        0,              /* tp_repr */
        0,              /* tp_as_number */
        0,              /* tp_as_sequence */
        0,              /* tp_as_mapping */
        0,              /* tp_hash */
        dictlist_remove_value,  /* tp_call */
};
static PyObject * dictlist_add_value(PyObject * self, PyObject * args, PyObject * kwds)
{
    PyObject * dict;
    PyEntity * item;
    char * key;
    if (!PyArg_ParseTuple(args, "OsO", &dict, &key, &item)) {
        return NULL;
    }
    if (!PyDict_Check(dict)) {
        PyErr_SetString(PyExc_TypeError, "Dict is not a dictionary");
        return NULL;
    }
    PyObject * list = PyDict_GetItemString(dict, key);
    if (list != NULL) {
        if (!PyList_Check(list)) {
            PyErr_SetString(PyExc_TypeError, "Dict does not contain a list");
            return NULL;
        }
        int i, size = PyList_Size(list);
        for(i = 0; i < size; i++) {
            PyEntity * entry = (PyEntity*)PyList_GetItem(list,i);
            if (entry->m_entity == item->m_entity) {
                goto present;
            }
        }
        PyList_Append(list, (PyObject*)item);
    } else {
        list = PyList_New(0);
        PyList_Append(list, (PyObject*)item);
        PyDict_SetItemString(dict, key, list);
        Py_DECREF(list);
    }
present:
    Py_INCREF(Py_None);
    return Py_None;
}

PyTypeObject dictlist_add_value_type = {
        PyObject_HEAD_INIT(&PyType_Type)
        0,
        "Function",
        sizeof(FunctionObject),
        0,
        /* methods */
        (destructor)Function_dealloc,
        0,              /* tp_print */
        0,              /* tp_getattr */
        0,              /* tp_setattr */
        0,              /* tp_compare */
        0,              /* tp_repr */
        0,              /* tp_as_number */
        0,              /* tp_as_sequence */
        0,              /* tp_as_mapping */
        0,              /* tp_hash */
        dictlist_add_value,     /* tp_call */
};

static PyObject * Get_PyClass(const std::string & package,
                              const std::string & _type)
{
    std::string type = _type;
    type[0] = toupper(type[0]);
    PyObject * package_name = PyString_FromString((char *)package.c_str());
    PyObject * mod_dict = PyImport_Import(package_name);
    Py_DECREF(package_name);
    if (mod_dict == NULL) {
        std::string msg = std::string("Missing python module ") + package;
        log(ERROR, msg.c_str());
        PyErr_Print();
        return NULL;
    }
    PyObject * my_class = PyObject_GetAttrString(mod_dict, (char *)type.c_str());
    Py_DECREF(mod_dict);
    if (my_class == NULL) {
        std::string msg = std::string("Missing class ") + package + "." + type;
        log(ERROR, msg.c_str());
        PyErr_Print();
        return NULL;
    }
    if (PyCallable_Check(my_class) == 0) {
        std::string msg = std::string("Could not instance python class ")
                        + package + "." + type;
        log(ERROR, msg.c_str());
        Py_DECREF(my_class);
        return NULL;
    }
#if 0
    // In later versions of python using PyType_* will become the right thing to do.
    if (PyType_Check(my_class) == 0) {
        std::cerr << "PyCallable_Check returned true, but PyType_Check returned false " << package << "." << type << std::endl << std::flush;
    } else {
        std::cerr << "PyType_Check returned true" << std::endl << std::flush;
    }
#endif
    return my_class;
}

static PyObject * Create_PyScript(PyObject * pyEntity, PyObject * pyClass)
{
    PyObject * pyob = PyEval_CallFunction(pyClass,"(O)", pyEntity);
    
    if (pyob == NULL) {
        if (PyErr_Occurred() == NULL) {
            log(ERROR, "Could not create python instance");
        } else {
            log(ERROR, "Reporting python error");
            PyErr_Print();
        }
    }
    Py_DECREF(pyClass);
    Py_DECREF(pyEntity);
    return pyob;
}

template<class T>
void Subscribe_Script(T * entity, PyObject * pyclass,
                      const std::string& package)
{
    PyObject * dmap = PyObject_GetAttrString(pyclass, "__dict__");
    if (dmap == NULL) {
        std::string msg = std::string( "Python class for ") + package
                        + " has no __dict__";
        log(ERROR, msg.c_str());
        return;
    }
    if (!PyDict_Check(dmap)) {
        std::string msg = std::string( "Python class for ") + package
                        + " is malformed";
        log(ERROR, msg.c_str());
        return;
    }
    PyObject * keys = PyDict_Keys(dmap);
    if (keys == NULL) {
        std::string msg = std::string("Error getting attribute list of Python class for ") + package;
        log(ERROR, msg.c_str());
        return;
    }
    for(int i = 0; i < PyList_Size(keys); i++) {
        std::string method(PyString_AsString(PyList_GetItem(keys, i)));
        std::string::size_type l = method.find("_operation", 0, 10);
        if (l == std::string::npos) {
            debug(std::cout << method << " is not a method" << std::endl
                            << std::flush;);
        } else {
            std::string op_name = method.substr(0,l);
            debug(std::cout << method << " is a method, it contains _op.. at "
                            << l << " so we can register for "
                            << method.substr(0,l) << std::endl << std::flush;);
            entity->scriptSubscribe(op_name);
        }
    }
    Py_DECREF(keys);
}

void Create_PyEntity(Entity * entity, const std::string & package,
                                    const std::string & _type)
{
    PyObject * c = Get_PyClass(package, _type);
    if (c == NULL) { return; }
    PyEntity * pyEntity = newPyEntity();
    pyEntity->m_entity = entity;
    Subscribe_Script(entity, c, package);
    PyObject * o = Create_PyScript((PyObject *)pyEntity, c);
    if (o != NULL) {
        entity->setScript(new PythonEntityScript(o, *entity));
    }
}

void Create_PyMind(BaseMind * mind, const std::string & package,
                                    const std::string & _type)
{
    PyObject * c = Get_PyClass(package, _type);
    if (c == NULL) { return; }
    PyMind * pyMind = newPyMind();
    pyMind->m_mind = mind;
    Subscribe_Script(mind, c, package);
    PyObject * o = Create_PyScript((PyObject *)pyMind, c);

    if (o != NULL) {
        mind->setScript(new PythonMindScript(o, *mind));
    }
}

static PyObject * is_location(PyObject * self, PyObject * args)
{
    PyObject * loc;
    if (!PyArg_ParseTuple(args, "O", &loc)) {
        return NULL;
    }
    if (PyLocation_Check(loc)) {
        Py_INCREF(Py_True);
        return Py_True;
    }
    Py_INCREF(Py_False);
    return Py_False;
}

static PyObject * location_new(PyObject * self, PyObject * args)
{
    PyLocation *o;
    // We need to deal with actual args here
    PyObject * refO, * coordsO = NULL;
    bool decrefO = false;
    if (PyArg_ParseTuple(args, "O|O", &refO, &coordsO)) {
        if ((!PyEntity_Check(refO)) && (!PyWorld_Check(refO)) && (!PyMind_Check(refO))) {
            if (PyObject_HasAttrString(refO, "cppthing")) {
                refO = PyObject_GetAttrString(refO, "cppthing");
                decrefO = true;
            }
            if (!PyEntity_Check(refO) && !PyMind_Check(refO)) {
                PyErr_SetString(PyExc_TypeError, "Arg ref required");
                if (decrefO) { Py_DECREF(refO); }
                return NULL;
            }
        }
        if ((coordsO != NULL) && (!PyVector3D_Check(coordsO))) {
            PyErr_SetString(PyExc_TypeError, "Arg coords required");
            if (decrefO) { Py_DECREF(refO); }
            return NULL;
        }

        Entity * ref_ent;
        if (PyWorld_Check(refO)) {
            PyWorld * ref = (PyWorld*)refO;
#ifndef NDEBUG
            if (ref->world == NULL) {
                PyErr_SetString(PyExc_AssertionError, "Parent world is invalid");
                if (decrefO) { Py_DECREF(refO); }
                return NULL;
            }
#endif // NDEBUG
            ref_ent = &ref->world->m_gameWorld;
        } else if (PyMind_Check(refO)) {
            PyMind * ref = (PyMind*)refO;
#ifndef NDEBUG
            if (ref->m_mind == NULL) {
                PyErr_SetString(PyExc_AssertionError, "Parent mind is invalid");
                if (decrefO) { Py_DECREF(refO); }
                return NULL;
            }
#endif // NDEBUG
            ref_ent = ref->m_mind;
        } else {
            PyEntity * ref = (PyEntity*)refO;
#ifndef NDEBUG
            if (ref->m_entity == NULL) {
                PyErr_SetString(PyExc_AssertionError, "Parent thing is invalid");
                if (decrefO) { Py_DECREF(refO); }
                return NULL;
            }
#endif // NDEBUG
            ref_ent = ref->m_entity;
        }
        if (decrefO) { Py_DECREF(refO); }
        PyVector3D * coords = (PyVector3D*)coordsO;
        o = newPyLocation();
        if ( o == NULL ) {
            return NULL;
        }
        if (coords == NULL) {
            o->location = new Location(ref_ent);
        } else {
            o->location = new Location(ref_ent, coords->coords);
        }
        o->own = 1;
    } else if (PyArg_ParseTuple(args, "")) {
        o = newPyLocation();
        if ( o == NULL ) {
            return NULL;
        }
        o->location = new Location;
        o->own = 1;
    } else {
        return NULL;
    }
    return (PyObject *)o;
}

static PyObject * vector3d_new(PyObject * self, PyObject * args)
{
        PyVector3D *o;
        Vector3D val;
        // We need to deal with actual args here
        PyObject * clist;
        switch (PyTuple_Size(args)) {
            case 0:
                break;
            case 1:
                clist = PyTuple_GetItem(args, 0);
                if ((!PyList_Check(clist)) || (PyList_Size(clist) != 3)) {
                    PyErr_SetString(PyExc_TypeError, "Vector3D() from single value must a list 3 long");
                    return NULL;
                }
                for(int i = 0; i < 3; i++) {
                    PyObject * item = PyList_GetItem(clist, i);
                    if (PyInt_Check(item)) {
                        val[i] = (float)PyInt_AsLong(item);
                    } else if (PyFloat_Check(item)) {
                        val[i] = PyFloat_AsDouble(item);
                    } else {
                        PyErr_SetString(PyExc_TypeError, "Vector3D() must take list of floats, or ints");
                        return NULL;
                    }
                }
                val.setValid();
                break;
            case 3:
                for(int i = 0; i < 3; i++) {
                    PyObject * item = PyTuple_GetItem(args, i);
                    if (PyInt_Check(item)) {
                        val[i] = (float)PyInt_AsLong(item);
                    } else if (PyFloat_Check(item)) {
                        val[i] = PyFloat_AsDouble(item);
                    } else {
                        PyErr_SetString(PyExc_TypeError, "Vector3D() must take list of floats, or ints");
                        return NULL;
                    }
                }
                val.setValid();
                break;
            default:
                PyErr_SetString(PyExc_TypeError, "Vector3D must take list of floats, or ints, 3 ints or 3 floats");
                return NULL;
                break;
        }
            
        o = newPyVector3D();
        if ( o == NULL ) {
                return NULL;
        }
        o->coords = val;
        return (PyObject *)o;
}

static PyObject * quaternion_new(PyObject * self, PyObject * args)
{
        PyQuaternion *o;
        Quaternion val;

        PyObject * clist;
        switch (PyTuple_Size(args)) {
            case 0:
                break;
            case 1:
                clist = PyTuple_GetItem(args, 0);
                if ((!PyList_Check(clist)) || (PyList_Size(clist) != 4)) {
                    PyErr_SetString(PyExc_TypeError, "Quaternion() from single value must a list 4 long");
                    return NULL;
                }
                {
                float quaternion[4];
                for(int i = 0; i < 4; i++) {
                    PyObject * item = PyList_GetItem(clist, i);
                    if (PyInt_Check(item)) {
                        quaternion[i] = (WFMath::CoordType)PyInt_AsLong(item);
                    } else if (PyFloat_Check(item)) {
                        quaternion[i] = PyFloat_AsDouble(item);
                    } else {
                        PyErr_SetString(PyExc_TypeError, "Quaternion() must take list of floats, or ints");
                        return NULL;
                    }
                }
                val = Quaternion(quaternion[3], quaternion[0],
                                 quaternion[1], quaternion[2]);
                }
                break;
            case 2:
                {
                PyObject * v1 = PyTuple_GetItem(args, 0);
                PyObject * v2 = PyTuple_GetItem(args, 0);
                if (!PyVector3D_Check(v1) || !PyVector3D_Check(v2)) {
                    PyErr_SetString(PyExc_TypeError, "Quaternion(a,b) must take two vectors");
                    return NULL;
                }
                PyVector3D * from = (PyVector3D *)v1;
                PyVector3D * to = (PyVector3D *)v2;
                val = quaternionFromTo(from->coords, to->coords);
                }
                break;
            case 4:
                {
                float quaternion[4];
                for(int i = 0; i < 4; i++) {
                    PyObject * item = PyTuple_GetItem(args, i);
                    if (PyInt_Check(item)) {
                        quaternion[i] = (WFMath::CoordType)PyInt_AsLong(item);
                    } else if (PyFloat_Check(item)) {
                        quaternion[i] = PyFloat_AsDouble(item);
                    } else {
                        PyErr_SetString(PyExc_TypeError, "Quaternion() must take list of floats, or ints");
                        return NULL;
                    }
                }
                val = Quaternion(quaternion[3], quaternion[0],
                                 quaternion[1], quaternion[2]);
                }
                break;
            default:
                PyErr_SetString(PyExc_TypeError, "Quaternion must take list of floats, or ints, 4 ints or 4 floats");
                return NULL;
                break;
        }

        o = newPyQuaternion();
        if ( o == NULL ) {
                return NULL;
        }
        o->rotation = val;
        return (PyObject *)o;
}

static PyObject * worldtime_new(PyObject * self, PyObject * args)
{
        PyWorldTime *o;
                
        int seconds;
        if (!PyArg_ParseTuple(args, "i", &seconds)) {
                return NULL;
        }
        o = newPyWorldTime();
        if ( o == NULL ) {
                return NULL;
        }
        o->time = new WorldTime(seconds);
        o->own = true;
        return (PyObject *)o;
}

static inline void addToOplist(PyOperation * op, PyOplist * o)
{
    if (op != NULL) {
       if (PyOperation_Check(op)) {
           o->ops->push_back(op->operation);
           op->own = 0;
       } else if ((PyObject*)op != Py_None) {
           PyErr_SetString(PyExc_TypeError, "Argument must be an op");
           return;
       }
    }
}


static PyObject * oplist_new(PyObject * self, PyObject * args)
{
        PyOplist *o;
        
        PyOperation *op1 = NULL, *op2 = NULL, *op3 = NULL, *op4 = NULL;
        if (!PyArg_ParseTuple(args, "|OOOO", &op1, &op2, &op3, &op4)) {
                return NULL;
        }
        o = newPyOplist();
        if ( o == NULL ) {
                return NULL;
        }
        o->ops = new OpVector();
        addToOplist(op1, o);
        addToOplist(op2, o);
        addToOplist(op3, o);
        addToOplist(op4, o);
        return (PyObject *)o;
}

static PyObject * object_new(PyObject * self, PyObject * args)
{
        PyMessageElement *o;
        
        if (!PyArg_ParseTuple(args, "")) {
                return NULL;
        }
        o = newPyMessageElement();
        if ( o == NULL ) {
                return NULL;
        }
        o->m_obj = new Element(Element::MapType());
        return (PyObject *)o;
}

static PyObject * entity_new(PyObject * self, PyObject * args, PyObject * kwds)
{
    PyMessageElement *o;
    char * id = NULL;
    
    if (!PyArg_ParseTuple(args, "|s", &id)) {
        return NULL;
    }
    Element::MapType omap;
    if (id != NULL) {
        omap["id"] = std::string(id);
    }
    if ((kwds != NULL) && (PyDict_Check(kwds))) {
        PyObject * keys = PyDict_Keys(kwds);
        PyObject * vals = PyDict_Values(kwds);
        if ((keys == NULL) || (vals == NULL)) {
            PyErr_SetString(PyExc_RuntimeError, "Error in keywords");
            return NULL;
        }
        int i, size = PyList_Size(keys); 
        for(i = 0; i < size; i++) {
            char * key = PyString_AsString(PyList_GetItem(keys, i));
            PyObject * val = PyList_GetItem(vals, i);
            if ((strcmp(key, "location") == 0) && (PyLocation_Check(val))) {
                PyLocation * loc = (PyLocation*)val;
                loc->location->addToObject(omap);
            } else if (strcmp(key, "xyz") == 0) {
                omap["pos"] = PyObject_asMessageElement(val);
            } else if ((strcmp(key, "parent") == 0) && (PyString_Check(val))) {
                omap["loc"] = PyString_AsString(val);
            } else if ((strcmp(key, "type") == 0) && (PyString_Check(val))) {
                omap["parents"] = Element::ListType(1,std::string(PyString_AsString(val)));
            } else {
                Element val_obj = PyObject_asMessageElement(val);
                if (val_obj.getType() == Element::TYPE_NONE) {
                    fprintf(stderr, "Could not handle %s value in Entity()", key);
                    PyErr_SetString(PyExc_TypeError, "Argument type error to Entity()");
                    Py_DECREF(keys);
                    Py_DECREF(vals);
                    return NULL;
                }
                omap[key] = val_obj;
            }
        }
        Py_DECREF(keys);
        Py_DECREF(vals);
    }

    o = newPyMessageElement();
    if ( o == NULL ) {
        return NULL;
    }
    o->m_obj = new Element(omap);
    return (PyObject *)o;
}

static PyObject * cppthing_new(PyObject * self, PyObject * args)
{
        PyEntity *o;

        if (!PyArg_ParseTuple(args, "")) {
                return NULL;
        }
        o = newPyEntity();
        if ( o == NULL ) {
                return NULL;
        }
        return (PyObject *)o;
}

static inline void addToArgs(Element::ListType & args, PyObject * ent)
{
    if (ent == NULL) {
        return;
    }
    if (PyMessageElement_Check(ent)) {
        PyMessageElement * obj = (PyMessageElement*)ent;
        if (obj->m_obj == NULL) {
            fprintf(stderr, "Invalid object in Operation arguments\n");
            return;
        }
        Element o(*obj->m_obj);
        if (o.isMap() && (obj->Object_attr != NULL)) {
            Element::MapType & ent = o.asMap();
            Element::MapType ent2 = PyDictObject_asElementMap(obj->Object_attr);
            Element::MapType::const_iterator I = ent2.begin();
            for(; I != ent2.end(); I++) {
                if (ent.find(I->first) != ent.end()) {
                    ent[I->first] = I->second;
                }
            }
        }
        args.push_back(o);
    } else if (PyOperation_Check(ent)) {
        PyOperation * op = (PyOperation*)ent;
        if (op->operation == NULL) {
            fprintf(stderr, "Invalid operation in Operation arguments\n");
            return;
        }
        args.push_back(op->operation->asObject());
    } else {
        fprintf(stderr, "Non-entity passed as arg to Operation()\n");
    }
}

static PyObject * operation_new(PyObject * self, PyObject * args, PyObject * kwds)
{
    PyOperation * op;

    char * type;
    PyObject * arg1 = NULL;
    PyObject * arg2 = NULL;
    PyObject * arg3 = NULL;

    if (!PyArg_ParseTuple(args, "s|OOO", &type, &arg1, &arg2, &arg3)) {
        return NULL;
    }
    op = newPyOperation();
    if (op == NULL) {
        return NULL;
    }
    if (strcmp(type, "tick") == 0) {
        op->operation = new Tick();
    } else if (strcmp(type, "sight") == 0) {
        op->operation = new Sight();
    } else if (strcmp(type, "set") == 0) {
        op->operation = new Set();
    } else if (strcmp(type, "burn") == 0) {
        op->operation = new Burn();
    } else if (strcmp(type, "action") == 0) {
        op->operation = new Action();
    } else if (strcmp(type, "chop") == 0) {
        op->operation = new Chop();
    } else if (strcmp(type, "cut") == 0) {
        op->operation = new Cut();
    } else if (strcmp(type, "create") == 0) {
        op->operation = new Create();
    } else if (strcmp(type, "setup") == 0) {
        op->operation = new Setup();
    } else if (strcmp(type, "look") == 0) {
        op->operation = new Look();
    } else if (strcmp(type, "move") == 0) {
        op->operation = new Move();
    } else if (strcmp(type, "talk") == 0) {
        op->operation = new Talk();
    } else if (strcmp(type, "touch") == 0) {
        op->operation = new Touch();
    } else if (strcmp(type, "eat") == 0) {
        op->operation = new Eat();
    } else if (strcmp(type, "nourish") == 0) {
        op->operation = new Nourish();
    } else if (strcmp(type, "info") == 0) {
        op->operation = new Info();
    } else if (strcmp(type, "thought") == 0 ||
               strcmp(type, "goal_info") == 0) {
        Py_DECREF(op);
        Py_INCREF(Py_None);
        return Py_None;
    } else {
        // FIXME use generic, once generic is fixed again.
        op->operation = new RootOperation();
        op->operation->setParents(Element::ListType(1, type));
        // fprintf(stderr, "NOTICE: Python creating a custom %s op\n", type);
        //*op->operation = Root;
        // Py_DECREF(op);
        // Py_INCREF(Py_None);
        // return Py_None;
    }
    op->own = 1;
    if (PyMapping_HasKeyString(kwds, "to")) {
        PyObject * to = PyMapping_GetItemString(kwds, "to");
        PyObject * to_id;
        if (PyString_Check(to)) {
            to_id = to;
        } else if ((to_id = PyObject_GetAttrString(to, "id")) == NULL) {
            fprintf(stderr, "To was not really an entity, as it had no id\n");
            Py_DECREF(to);
            return NULL;
        } else {
            // to_id == to.getattr("id") and to is finished with
            Py_DECREF(to);
        }
        if (!PyString_Check(to_id)) {
            fprintf(stderr, "To id is not a string\n");
            Py_DECREF(to_id);
            return NULL;
        }
        op->operation->setTo(PyString_AsString(to_id));
        Py_DECREF(to_id);
    }
    if (PyMapping_HasKeyString(kwds, "from_")) {
        PyObject * from = PyMapping_GetItemString(kwds, "from_");
        PyObject * from_id;
        if (PyString_Check(from)) {
            from_id = from;
        } else if ((from_id = PyObject_GetAttrString(from, "id")) == NULL) {
            fprintf(stderr, "From was not really an entity, as it had no id\n");
            Py_DECREF(from);
            return NULL;
        } else {
            Py_DECREF(from);
        }
        if (!PyString_Check(from_id)) {
            fprintf(stderr, "From id is not a string\n");
            Py_DECREF(from_id);
            return NULL;
        }
        op->operation->setFrom(PyString_AsString(from_id));
        Py_DECREF(from_id);
    }
    Element::ListType args_list;
    addToArgs(args_list, arg1);
    addToArgs(args_list, arg2);
    addToArgs(args_list, arg3);
    op->operation->setArgs(args_list);
    return (PyObject *)op;
}

static PyObject * set_kw(PyObject * meth_self, PyObject * args)
{
    // Takes self, kw, name, default = None
    PyObject * self;
    PyObject * kw;
    char * name;
    PyObject * def = NULL;

    if (!PyArg_ParseTuple(args, "OOs|O", &self, &kw, &name, &def)) {
        return NULL;
    }
    PyObject * attr = PyObject_GetAttrString(self, "attributes");
    if (attr == NULL) {
        PyErr_SetString(PyExc_AttributeError, "SET_KW: No attributes list");
        return NULL;
    }
    int i = PyList_Size(attr);
    char * entry;
    PyObject * item;
    for(i = 0; i < PyList_Size(attr); i++) {
        item = PyList_GetItem(attr, i);
        if (!PyString_Check(item)) {
            continue;
        }
        entry = PyString_AsString(item);
        if (strcmp(entry, name) == 0) {
            goto list_contains_it;
        }
        // Should I free entry at this point?
    }
    {
      PyObject * namestr = PyString_FromString(name);
      PyList_Append(attr, namestr);
      Py_DECREF(namestr);
    }
list_contains_it:
    Py_DECREF(attr);
    if (!PyDict_Check(kw)) {
        PyErr_SetString(PyExc_TypeError, "SET_KW: kw not a dict");
        return NULL;
    }
    PyObject * value = NULL;
    bool decvalue = false;
    if ((value = PyDict_GetItemString(kw, name)) == NULL) {
        PyObject * copy = PyDict_GetItemString(kw, "copy");
        if ((copy != NULL) && (PyObject_HasAttrString(copy, name))) {
            value = PyObject_GetAttrString(copy, name);
            decvalue = true;
        } else {
            value = def;
        }
    }
    if (value == NULL) {
        Py_INCREF(Py_None);
        value = Py_None;
    }
    PyObject_SetAttrString(self, name, value);

    if (decvalue) { Py_DECREF(value); }
    
    Py_INCREF(Py_None);
    return Py_None;
}

static PyMethodDef atlas_methods[] = {
    /* {"system",       spam_system, METH_VARARGS}, */
    {"Operation",  (PyCFunction)operation_new,  METH_VARARGS|METH_KEYWORDS},
    {"isLocation", is_location,                 METH_VARARGS},
    {"Location",   location_new,                METH_VARARGS},
    {"Object",     object_new,                  METH_VARARGS},
    {"Entity",     (PyCFunction)entity_new,     METH_VARARGS|METH_KEYWORDS},
    {"Message",    oplist_new,                  METH_VARARGS},
    {"cppEntity",   cppthing_new,               METH_VARARGS},
    {NULL,              NULL}                           /* Sentinel */
};

static PyMethodDef vector3d_methods[] = {
        {"Vector3D",    vector3d_new,   METH_VARARGS},
        {NULL,          NULL}                           /* Sentinel */
};

static PyMethodDef quaternion_methods[] = {
        {"Quaternion",  quaternion_new, METH_VARARGS},
        {NULL,          NULL}                           /* Sentinel */
};

static PyMethodDef server_methods[] = {
        {"WorldTime",   worldtime_new,  METH_VARARGS},
        {NULL,          NULL}                           /* Sentinel */
};

static PyMethodDef common_methods[] = {
        //{"null",      null_new,       METH_VARARGS},
        {NULL,          NULL}                           /* Sentinel */
};

static PyMethodDef misc_methods[] = {
        {"set_kw",      set_kw,         METH_VARARGS},
        {NULL,          NULL}                           /* Sentinel */
};

void init_python_api()
{
    std::string importCmd("ruleset_import_hooks.install([");
    std::vector<std::string>::const_iterator I;
    for(I = rulesets.begin(); I != rulesets.end(); I++) {
        if (I != rulesets.begin()) {
            importCmd = importCmd + ",";
        }
        importCmd = importCmd + "\"" + *I + "\"";
    }
    importCmd = importCmd + "])\n";

    Py_Initialize();

    PyObject * sys_name = PyString_FromString("sys");
    PyObject * sys_module = PyImport_Import(sys_name);
    Py_DECREF(sys_name);

    if (sys_module == 0) {
        log(CRITICAL, "Python could not import sys module");
        return;
    }

    PyObject * logger = (PyObject*)PyObject_NEW(PyLogger, &PyLogger_Type);
    PyObject_SetAttrString(sys_module, "stdout", logger);
    Py_DECREF(logger);
    PyObject * errorLogger = (PyObject*)PyObject_NEW(PyLogger,
                                                     &PyErrorLogger_Type);
    PyObject_SetAttrString(sys_module, "stderr", errorLogger);
    Py_DECREF(errorLogger);

    PyObject * sys_path = PyObject_GetAttrString(sys_module, "path");
    if (sys_path != 0) {
        if (PyList_Check(sys_path)) {
            for(I = rulesets.begin(); I != rulesets.end(); I++) {
                std::string p = share_directory + "/cyphesis/rulesets/" + *I;
                PyObject * path = PyString_FromString(p.c_str());
                PyList_Append(sys_path, path);
                Py_DECREF(path);
            }
        } else {
            log(CRITICAL, "Python sys.path is not a list");
        }
    } else {
        log(CRITICAL, "Python could not import sys.path");
    }
    Py_DECREF(sys_module);

    if (Py_InitModule("atlas", atlas_methods) == NULL) {
        fprintf(stderr, "Failed to Create atlas module\n");
        return;
    }

    if (Py_InitModule("Vector3D", vector3d_methods) == NULL) {
        fprintf(stderr, "Failed to Create Vector3D module\n");
        return;
    }

    if (Py_InitModule("Quaternion", quaternion_methods) == NULL) {
        fprintf(stderr, "Failed to Create Quaternion module\n");
        return;
    }

    if (Py_InitModule("misc", misc_methods) == NULL) {
        fprintf(stderr, "Failed to Create misc module\n");
        return;
    }

    PyObject * common = Py_InitModule("common", common_methods);
    if (common == NULL) {
        fprintf(stderr, "Failed to Create common module\n");
        return;
    }

    PyObject * common_dict = PyModule_GetDict(common);

    /// Create the common.log module
    PyObject * log = PyModule_New("log");
    PyDict_SetItemString(common_dict, "log", log);

    PyObject * debug = (PyObject*)PyObject_NEW(FunctionObject, &log_debug_type);
    PyObject_SetAttrString(log, "debug", debug);
    Py_DECREF(debug);
    Py_DECREF(log);

    PyObject * o;

    /// Create the common.const module
    PyObject * _const = PyModule_New("const");
    PyDict_SetItemString(common_dict, "const", _const);

    o = PyInt_FromLong(0);
    PyObject_SetAttrString(_const, "server_python", o);
    Py_DECREF(o);
    o = PyInt_FromLong(consts::debug_level);
    PyObject_SetAttrString(_const, "debug_level", o);
    Py_DECREF(o);
    o = PyInt_FromLong(consts::debug_thinking);
    PyObject_SetAttrString(_const, "debug_thinking", o);
    Py_DECREF(o);

    o = PyFloat_FromDouble(consts::time_multiplier);
    PyObject_SetAttrString(_const, "time_multiplier", o);
    Py_DECREF(o);
    o = PyFloat_FromDouble(consts::base_velocity_coefficient);
    PyObject_SetAttrString(_const, "base_velocity_coefficient", o);
    Py_DECREF(o);
    o = PyFloat_FromDouble(consts::base_velocity);
    PyObject_SetAttrString(_const, "base_velocity", o);
    Py_DECREF(o);

    o = PyFloat_FromDouble(consts::basic_tick);
    PyObject_SetAttrString(_const, "basic_tick", o);
    Py_DECREF(o);

    o = PyFloat_FromDouble(consts::sight_range);
    PyObject_SetAttrString(_const, "sight_range", o);
    Py_DECREF(o);
    o = PyFloat_FromDouble(consts::hearing_range);
    PyObject_SetAttrString(_const, "hearing_range", o);
    Py_DECREF(o);
    o = PyInt_FromLong(consts::enable_ranges);
    PyObject_SetAttrString(_const, "enable_ranges", o);
    Py_DECREF(o);
    Py_DECREF(_const);

    /// Create the common.globals module
    PyObject * globals = PyModule_New("globals");
    PyDict_SetItemString(common_dict, "globals", globals);
    o = PyString_FromString(share_directory.c_str());
    PyObject_SetAttrString(globals, "share_directory", o);
    Py_DECREF(o);
    Py_DECREF(globals);

    PyObject * server;
    if ((server = Py_InitModule("server", server_methods)) == NULL) {
        fprintf(stderr, "Failed to Create server module\n");
        return;
    }
    PyObject * server_dict = PyModule_GetDict(server);
    PyObject * dictlist = PyModule_New("dictlist");
    PyObject * add_value = (PyObject *)PyObject_NEW(FunctionObject, &dictlist_add_value_type);
    PyObject_SetAttrString(dictlist, "add_value", add_value);
    Py_DECREF(add_value);
    PyObject * remove_value = (PyObject *)PyObject_NEW(FunctionObject, &dictlist_remove_value_type);
    PyObject_SetAttrString(dictlist, "remove_value", remove_value);
    Py_DECREF(remove_value);
    PyDict_SetItemString(server_dict, "dictlist", dictlist);
    Py_DECREF(dictlist);

    PyRun_SimpleString("from hooks import ruleset_import_hooks\n");
    PyRun_SimpleString((char *)importCmd.c_str());

    debug(std::cout << Py_GetPath() << std::endl << std::flush;);
}

void shutdown_python_api()
{
    
    Py_Finalize();
}