// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
// Mobius Forensic Toolkit
// Copyright (C) 2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022 Eduardo Aguiar
//
// 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, 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, see <http://www.gnu.org/licenses/>.
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \file imagefile.cc C++ API <i>mobius.vfs.imagefile</i> class wrapper
//! \author Eduardo Aguiar
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
#include <pymobius.h>
#include "imagefile.h"
#include "module.h"
#include "io/file.h"
#include "io/reader.h"
#include "io/writer.h"
#include "pod/data.h"

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief Create <i>imagefile</i> Python object from C++ object
//! \param obj C++ object
//! \return new imagefile object
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
PyObject *
pymobius_vfs_imagefile_to_pyobject (mobius::vfs::imagefile obj)
{
  PyObject *ret = nullptr;

  try
    {
      ret = _PyObject_New (&vfs_imagefile_t);

      if (ret)
        ((vfs_imagefile_o *) ret)->obj = new mobius::vfs::imagefile (obj);
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>type</i> attribute getter
//! \param self object
//! \return <i>type</i> attribute
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_getter_type (vfs_imagefile_o *self)
{
  PyObject *ret = nullptr;

  try
    {
      ret = mobius::py::pystring_from_std_string (self->obj->get_type ());
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>size</i> attribute getter
//! \param self object
//! \return <i>size</i> attribute
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_getter_size (vfs_imagefile_o *self)
{
  PyObject *ret = nullptr;

  try
    {
      ret = mobius::py::pylong_from_std_uint64_t (self->obj->get_size ());
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>sectors</i> attribute getter
//! \param self object
//! \return <i>sectors</i> attribute
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_getter_sectors (vfs_imagefile_o *self)
{
  PyObject *ret = nullptr;

  try
    {
      ret = mobius::py::pylong_from_std_uint64_t (self->obj->get_sectors ());
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>sector_size</i> attribute getter
//! \param self object
//! \return <i>sector_size</i> attribute
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_getter_sector_size (vfs_imagefile_o *self)
{
  PyObject *ret = nullptr;

  try
    {
      ret = mobius::py::pylong_from_std_uint64_t (self->obj->get_sector_size ());
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief Getters and setters structure
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyGetSetDef tp_getset[] =
{
  {
    (char *) "type",
    (getter) tp_getter_type,
    (setter) 0,
    (char *) "type",
    NULL
  },
  {
    (char *) "size",
    (getter) tp_getter_size,
    (setter) 0,
    (char *) "size",
    NULL
  },
  {
    (char *) "sectors",
    (getter) tp_getter_sectors,
    (setter) 0,
    (char *) "number of sectors",
    NULL
  },
  {
    (char *) "sector_size",
    (getter) tp_getter_sector_size,
    (setter) 0,
    (char *) "sector size",
    NULL
  },
  {NULL, NULL, NULL, NULL, NULL} // sentinel
};

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>is_available</i> method implementation
//! \param self object
//! \param args argument list
//! \return new reader
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_f_is_available (vfs_imagefile_o *self, PyObject *)
{
  // execute C++ function
  PyObject *ret = nullptr;

  try
    {
      ret = mobius::py::pybool_from_bool (self->obj->is_available ());
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  // return value
  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>get_attribute</i> method implementation
//! \param self object
//! \param args argument list
//! \return attribute value
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_f_get_attribute (vfs_imagefile_o *self, PyObject *args)
{
  // parse input args
  std::string arg_id;

  try
    {
      arg_id = mobius::py::get_arg_as_std_string (args, 0);
    }
  catch (const std::exception& e)
    {
      mobius::py::set_invalid_type_error (e.what ());
      return nullptr;
    }

  // execute C++ code
  PyObject *ret = nullptr;

  try
    {
      ret = pymobius_pod_data_to_pyobject (self->obj->get_attribute (arg_id));
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>set_attribute</i> method implementation
//! \param self object
//! \param args argument list
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_f_set_attribute (vfs_imagefile_o *self, PyObject *args)
{
  // parse input args
  std::string arg_id;
  mobius::pod::data arg_value;

  try
    {
      arg_id = mobius::py::get_arg_as_std_string (args, 0);
      arg_value = mobius::py::get_arg_as_cpp (args, 1, pymobius_pod_data_from_pyobject);
    }
  catch (const std::exception& e)
    {
      mobius::py::set_invalid_type_error (e.what ());
      return nullptr;
    }

  // execute C++ code
  PyObject *ret = nullptr;

  try
    {
      self->obj->set_attribute (arg_id, arg_value);
      ret = mobius::py::pynone ();
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>get_attributes</i> method implementation
//! \param self object
//! \param args argument list
//! \return map containing attributes' IDs and values
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_f_get_attributes (vfs_imagefile_o *self, PyObject *)
{
  PyObject *ret = nullptr;

  try
    {
      ret = mobius::py::pydict_from_cpp_container (
              self->obj->get_attributes (),
              mobius::py::pystring_from_std_string,
              pymobius_pod_data_to_pyobject
            );
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>new_reader</i> method implementation
//! \param self object
//! \param args argument list
//! \return new reader
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_f_new_reader (vfs_imagefile_o *self, PyObject *)
{
  // execute C++ function
  PyObject *ret = nullptr;

  try
    {
      ret = pymobius_io_reader_to_pyobject (self->obj->new_reader ());
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  // return value
  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>new_writer</i> method implementation
//! \param self object
//! \param args argument list
//! \return new writer
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_f_new_writer (vfs_imagefile_o *self, PyObject *)
{
  // execute C++ function
  PyObject *ret = nullptr;

  try
    {
      ret = pymobius_io_writer_to_pyobject (self->obj->new_writer ());
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  // return value
  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief Methods structure
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyMethodDef tp_methods[] =
{
  {
    (char *) "is_available",
    (PyCFunction) tp_f_is_available,
    METH_VARARGS,
    "Check if imagefile is available"
  },
  {
    (char *) "get_attribute",
    (PyCFunction) tp_f_get_attribute,
    METH_VARARGS,
    "Get attribute value"
  },
  {
    (char *) "set_attribute",
    (PyCFunction) tp_f_set_attribute,
    METH_VARARGS,
    "Set attribute value"
  },
  {
    (char *) "get_attributes",
    (PyCFunction) tp_f_get_attributes,
    METH_VARARGS,
    "Get attributes"
  },
  {
    (char *) "new_reader",
    (PyCFunction) tp_f_new_reader,
    METH_VARARGS,
    "Create new reader"
  },
  {
    (char *) "new_writer",
    (PyCFunction) tp_f_new_writer,
    METH_VARARGS,
    "Create new writer"
  },
  {NULL, NULL, 0, NULL} // sentinel
};

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>imagefile</i> deallocator
//! \param self object
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static void
tp_dealloc (vfs_imagefile_o *self)
{
  delete self->obj;
  Py_TYPE (self)->tp_free ((PyObject*) self);
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>item</i> getattro
//! \param o Object
//! \param name Attribute name
//! \return Attribute value
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static PyObject *
tp_getattro (PyObject *o, PyObject *name)
{
  PyObject *ret = nullptr;
  
  try
    {
      // search first for item.__dict__ internal values, such as tp_getset
      // and tp_methods entries
      ret = PyObject_GenericGetAttr (o, name);

      if (ret == nullptr)
        {
          mobius::py::reset_error ();

          // search item.attributes, using item.get_attribute (name)
          auto self = reinterpret_cast <vfs_imagefile_o *> (o);
          auto s_name = mobius::py::pystring_as_std_string (name);
          ret = pymobius_pod_data_to_pyobject (self->obj->get_attribute (s_name));
        }
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
    }

  return ret;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief <i>item</i> setattro
//! \param o Object
//! \param name Attribute name
//! \param value Attribute value
//! \return 0 if success, -1 if error
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
static int
tp_setattro (PyObject *o, PyObject *name, PyObject *value)
{
  try
    {
      // check if it is a deletion operation
      auto s_name = mobius::py::pystring_as_std_string (name);

      if (value == nullptr)
        {
          mobius::py::set_invalid_type_error ("cannot delete attribute '" + s_name + "'");
          return -1;
        }

      // get attribute by name
      PyObject *attr = PyObject_GenericGetAttr (o, name);

      // internal attributes are read only
      if (attr != nullptr)
        {
          Py_DECREF (attr);

          if (value == nullptr)
            mobius::py::set_invalid_type_error ("cannot delete attribute '" + s_name + "'");
          else
            mobius::py::set_invalid_type_error ("cannot set attribute '" + s_name + "'");

          return -1;
        }

      // set attribute
      else
        {
          mobius::py::reset_error ();

          auto self = reinterpret_cast <vfs_imagefile_o *>(o);
          auto s_value = pymobius_pod_data_from_pyobject (value);
          self->obj->set_attribute (s_name, s_value);
        }
    }
  catch (const std::exception& e)
    {
      mobius::py::set_runtime_error (e.what ());
      return -1;
    }

  return 0;
}

// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
//! \brief Type structure
// =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
PyTypeObject vfs_imagefile_t =
{
  PyVarObject_HEAD_INIT (NULL, 0)
  "mobius.vfs.imagefile",            			// tp_name
  sizeof (vfs_imagefile_o),          			// tp_basicsize
  0,                                       		// tp_itemsize
  (destructor) tp_dealloc,                 		// tp_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
  0,                                       		// tp_call
  0,                                       		// tp_str
  tp_getattro,                                 		// tp_getattro
  tp_setattro,                                 		// tp_setattro
  0,                                       		// tp_as_buffer
  Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,		// tp_flags
  "imagefile class",                       		// tp_doc
  0,                                       		// tp_traverse
  0,                                       		// tp_clear
  0,                                       		// tp_richcompare
  0,                                       		// tp_weaklistoffset
  0,                                       		// tp_iter
  0,                                       		// tp_iternext
  tp_methods,                              		// tp_methods
  0,                                       		// tp_members
  tp_getset,                               		// tp_getset
  0,                                       		// tp_base
  0,                                       		// tp_dict
  0,                                       		// tp_descr_get
  0,                                       		// tp_descr_set
  0,                                       		// tp_dictoffset
  0,                                       		// tp_init
  0,                                       		// tp_alloc
  0,                                  	         	// tp_new
  0,                                       		// tp_free
  0,                                       		// tp_is_gc
  0,                                       		// tp_bases
  0,                                       		// tp_mro
  0,                                       		// tp_cache
  0,                                       		// tp_subclasses
  0,                                       		// tp_weaklist
  0,                                       		// tp_del
  0,                                       		// tp_version_tag
  0,                                       		// tp_finalize
};
