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/* Chrysalide - Outil d'analyse de fichiers binaires
 * collection.c - équivalent Python du fichier "plugins/yaml/collection.c"
 *
 * Copyright (C) 2019 Cyrille Bagard
 *
 *  This file is part of Chrysalide.
 *
 *  Chrysalide 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.
 *
 *  Chrysalide 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


#include "collection.h"


#include <pygobject.h>


#include <plugins/pychrysalide/helpers.h>


#include "../collection.h"



/* Crée un nouvel objet Python de type 'YamlCollection'. */
static PyObject *py_yaml_collection_new(PyTypeObject *, PyObject *, PyObject *);

/* Recherche les noeuds correspondant à un chemin. */
static PyObject *py_yaml_collection_find_by_path(PyObject *, PyObject *);

/* Indique la nature d'une collection Yaml. */
static PyObject *py_yaml_collection_is_sequence(PyObject *, void *);

/* Fournit la liste des noeuds intégrés dans une collection. */
static PyObject *py_yaml_collection_get_nodes(PyObject *, void *);



/******************************************************************************
*                                                                             *
*  Paramètres  : type = type de l'objet à instancier.                         *
*                args = arguments fournis à l'appel.                          *
*                kwds = arguments de type key=val fournis.                    *
*                                                                             *
*  Description : Crée un nouvel objet Python de type 'YamlCollection'.        *
*                                                                             *
*  Retour      : Instance Python mise en place.                               *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static PyObject *py_yaml_collection_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
    PyObject *result;                       /* Instance à retourner        */
    int seq;                                /* Indicateur de type          */
    int ret;                                /* Bilan de lecture des args.  */
    GYamlCollection *collec;                /* Création GLib à transmettre */

#define YAML_COLLECTION_DOC                                                         \
    "YamlCollection handle a collection of Yaml nodes.\n"                           \
    "\n"                                                                            \
    "Instances can be created using the following constructor:\n"                   \
    "\n"                                                                            \
    "    YamlCollection(seq=False)\n"                                               \
    "\n"                                                                            \
    "Where seq defines if the collection will be a sequence or a mapping of nodes."

    ret = PyArg_ParseTuple(args, "p", &seq);
    if (!ret) return NULL;

    collec = g_yaml_collection_new(seq);

    g_object_ref_sink(G_OBJECT(collec));
    result = pygobject_new(G_OBJECT(collec));
    g_object_unref(collec);

    return result;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : self = variable non utilisée ici.                            *
*                args = arguments fournis à l'appel.                          *
*                                                                             *
*  Description : Recherche les noeuds correspondant à un chemin.              *
*                                                                             *
*  Retour      : Liste de noeuds trouvés, éventuellement vide.                *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static PyObject *py_yaml_collection_find_by_path(PyObject *self, PyObject *args)
{
    PyObject *result;                       /* Instance à retourner        */
    const char *path;                       /* Chemin d'accès à traiter    */
    int ret;                                /* Bilan de lecture des args.  */
    GYamlCollection *collec;                /* Version GLib du type        */
    GYamlNode **found;                      /* Créations GLib à transmettre*/
    size_t count;                           /* Quantité de trouvailles     */
    size_t i;                               /* Boucle de parcours          */

#define YAML_COLLECTION_FIND_BY_PATH PYTHON_METHOD_DEF                      \
(                                                                           \
    find_by_path, "path",                                                   \
    METH_VARARGS, py_yaml_collection,                                       \
    "Find nodes from a Yaml node using a path.\n"                           \
    "\n"                                                                    \
    "Paths are node keys separated by '/', such as '/my/path/to/node'."     \
)

    ret = PyArg_ParseTuple(args, "s", &path);
    if (!ret) return NULL;

    collec = G_YAML_COLLEC(pygobject_get(self));

    g_yaml_collection_find_by_path(collec, path, &found, &count);

    result = PyTuple_New(count);

    for (i = 0; i < count; i++)
    {
#ifndef NDEBUG
        ret = PyTuple_SetItem(result, i, pygobject_new(G_OBJECT(found[i])));
        assert(ret == 0);
#else
        PyTuple_SetItem(result, i, pygobject_new(G_OBJECT(found[i])));
#endif

        g_object_unref(G_OBJECT(found[i]));

    }

    if (found != NULL)
        free(found);

    return result;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : self    = objet Python concerné par l'appel.                 *
*                closure = non utilisé ici.                                   *
*                                                                             *
*  Description : Fournit la liste des noeuds intégrés dans une collection.    *
*                                                                             *
*  Retour      : Enfants d'un noeud issu d'une collection Yaml.               *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static PyObject *py_yaml_collection_get_nodes(PyObject *self, void *closure)
{
    PyObject *result;                       /* Résultat à retourner        */
    GYamlCollection *collec;                /* Version GLib du type        */
    size_t count;                           /* Quantité de noeuds à traiter*/
    GYamlNode **nodes;                      /* Liste des noeuds à la racine*/
    size_t i;                               /* Boucle de parcours          */
#ifndef NDEBUG
    int ret;                                /* Bilan d'une insertion       */
#endif

#define YAML_COLLECTION_NODES_ATTRIB PYTHON_GET_DEF_FULL    \
(                                                           \
    nodes, py_yaml_collection,                              \
    "List of nodes contained in the current collection."    \
)

    collec = G_YAML_COLLEC(pygobject_get(self));

    nodes = g_yaml_collection_get_nodes(collec, &count);

    result = PyTuple_New(count);

    for (i = 0; i < count; i++)
    {
#ifndef NDEBUG
        ret = PyTuple_SetItem(result, i, pygobject_new(G_OBJECT(nodes[i])));
        assert(ret == 0);
#else
        PyTuple_SetItem(result, i, pygobject_new(G_OBJECT(nodes[i])));
#endif

        g_object_unref(G_OBJECT(nodes[i]));

    }

    free(nodes);

    return result;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : self    = objet Python concerné par l'appel.                 *
*                closure = non utilisé ici.                                   *
*                                                                             *
*  Description : Indique la nature d'une collection Yaml.                     *
*                                                                             *
*  Retour      : Nature de la collection.                                     *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

static PyObject *py_yaml_collection_is_sequence(PyObject *self, void *closure)
{
    PyObject *result;                       /* Résultat à retourner        */
    GYamlCollection *collec;                /* Version GLib du type        */
    bool status;                            /* Bilan de consultation       */

#define YAML_COLLECTION_IS_SEQUENCE_ATTRIB PYTHON_IS_DEF_FULL           \
(                                                                       \
    sequence, py_yaml_collection,                                       \
    "Nature of the collection: True is the collection is a sequence,"   \
    " False if it is a mapping of \"key: value\" nodes."                \
)

    collec = G_YAML_COLLEC(pygobject_get(self));

    status = g_yaml_collection_is_sequence(collec);

    result = status ? Py_True : Py_False;
    Py_INCREF(result);

    return result;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : -                                                            *
*                                                                             *
*  Description : Fournit un accès à une définition de type à diffuser.        *
*                                                                             *
*  Retour      : Définition d'objet pour Python.                              *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

PyTypeObject *get_python_yaml_collection_type(void)
{
    static PyMethodDef py_yaml_collection_methods[] = {
        YAML_COLLECTION_FIND_BY_PATH,
        { NULL }
    };

    static PyGetSetDef py_yaml_collection_getseters[] = {
        YAML_COLLECTION_IS_SEQUENCE_ATTRIB,
        YAML_COLLECTION_NODES_ATTRIB,
        { NULL }
    };

    static PyTypeObject py_yaml_collection_type = {

        PyVarObject_HEAD_INIT(NULL, 0)

        .tp_name        = "pychrysalide.plugins.yaml.YamlCollection",
        .tp_basicsize   = sizeof(PyGObject),

        .tp_flags       = Py_TPFLAGS_DEFAULT,

        .tp_doc         = YAML_COLLECTION_DOC,

        .tp_methods     = py_yaml_collection_methods,
        .tp_getset      = py_yaml_collection_getseters,
        .tp_new         = py_yaml_collection_new

    };

    return &py_yaml_collection_type;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : module = module dont la définition est à compléter.          *
*                                                                             *
*  Description : Prend en charge l'objet 'pychrysalide.....YamlCollection.    *
*                                                                             *
*  Retour      : Bilan de l'opération.                                        *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

bool register_python_yaml_collection(PyObject *module)
{
    PyTypeObject *type;                     /* Type Python 'YamlCollection'*/
    PyObject *dict;                         /* Dictionnaire du module      */

    type = get_python_yaml_collection_type();

    dict = PyModule_GetDict(module);

    if (!register_class_for_pygobject(dict, G_TYPE_YAML_COLLEC, type, &PyGObject_Type))
        return false;

    return true;

}


/******************************************************************************
*                                                                             *
*  Paramètres  : arg = argument quelconque à tenter de convertir.             *
*                dst = destination des valeurs récupérées en cas de succès.   *
*                                                                             *
*  Description : Tente de convertir en collection de noeuds de format Yaml.   *
*                                                                             *
*  Retour      : Bilan de l'opération, voire indications supplémentaires.     *
*                                                                             *
*  Remarques   : -                                                            *
*                                                                             *
******************************************************************************/

int convert_to_yaml_collection(PyObject *arg, void *dst)
{
    int result;                             /* Bilan à retourner           */

    result = PyObject_IsInstance(arg, (PyObject *)get_python_yaml_collection_type());

    switch (result)
    {
        case -1:
            /* L'exception est déjà fixée par Python */
            result = 0;
            break;

        case 0:
            PyErr_SetString(PyExc_TypeError, "unable to convert the provided argument to Yaml collection");
            break;

        case 1:
            *((GYamlCollection **)dst) = G_YAML_COLLEC(pygobject_get(arg));
            break;

        default:
            assert(false);
            break;

    }

    return result;

}