// This file may be redistributed and modified only under the terms of
// the GNU General Public License (See COPYING for details).
// Copyright (C) 2000,2001 Alistair Riddoch

#include "PythonThingScript.h"

#include "Py_Operation.h"
#include "Py_Oplist.h"

#include "Entity.h"

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

#include <Atlas/Objects/Operation/RootOperation.h>

static const bool debug_flag = false;

PythonEntityScript::PythonEntityScript(PyObject * o, Entity & t) :
    PythonScript(o, t), m_entity(t)
{
}

PythonEntityScript::~PythonEntityScript()
{
}

bool PythonEntityScript::Operation(const std::string & op_type,
                                   const Atlas::Objects::Operation::RootOperation & op,
                                   OpVector & ret_list,
                                   Atlas::Objects::Operation::RootOperation * sub_op)
{
    if (scriptObject == NULL) {
        debug( std::cout << "No script object asociated" << std::endl
                         << std::flush;);
        return false;
    }
    debug( std::cout << "Got script object for " << std::endl << std::flush;);
    std::string op_name = op_type+"_operation";
    // Construct apropriate python object thingies from op
    if (!PyObject_HasAttrString(scriptObject, (char *)(op_name.c_str()))) {
        debug( std::cout << "No method to be found for " 
                         << "." << op_name << std::endl << std::flush;);
        return false;
    }
    PyConstOperation * py_op = newPyConstOperation();
    py_op->operation = &op;
    py_op->own = 0;
    py_op->from = m_entity.m_world->getObject(op.getFrom());
    py_op->to = m_entity.m_world->getObject(op.getTo());
    PyObject * ret;
    ret = PyObject_CallMethod(scriptObject, (char *)(op_name.c_str()),
                                         "(O)", py_op);
    Py_DECREF(py_op);
    if (ret != NULL) {
        debug( std::cout << "Called python method " << op_name
                         << " for object " << std::endl << std::flush;);
        if (PyOperation_Check(ret)) {
            PyOperation * op = (PyOperation*)ret;
            if (op->operation != NULL) {
                ret_list.push_back(op->operation);
                op->own = 0;
            } else {
                debug( std::cout << "Method returned invalid operation"
                                 << std::endl << std::flush;);
            }
        } else if (PyOplist_Check(ret)) {
            PyOplist * op = (PyOplist*)ret;
            if (op->ops != NULL) {
                const OpVector & o = *op->ops;
                OpVector::const_iterator Iend = o.end();
                for (OpVector::const_iterator I = o.begin(); I != Iend; ++I) {
                    ret_list.push_back(*I);
                }
            } else {
                debug( std::cout << "Method returned invalid OpVector"
                                 << std::endl << std::flush;);
            }
        } else {
            debug( std::cout << "Method returned invalid object" << std::endl
                             << std::flush;);
        }
        
        Py_DECREF(ret);
        return true;
    } else {
        if (PyErr_Occurred() == NULL) {
            debug( std::cout << "No method to be found for " << std::endl
                             << std::flush;);
        } else {
            log(ERROR, "Reporting python error");
            PyErr_Print();
        }
    }
    return false;
}

void PythonEntityScript::hook(const std::string &, Entity *)
{
}