/*
 * 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
 * of the License, 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, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

/** \file
 * \ingroup pythonintern
 *
 * This file defines a 'PyStructSequence' accessed via 'bpy.app', mostly
 * exposing static applications variables such as version and buildinfo
 * however some writable variables have been added such as 'debug' and 'tempdir'
 */

#include <Python.h>

#include "bpy_app.h"

#include "bpy_app_alembic.h"
#include "bpy_app_ffmpeg.h"
#include "bpy_app_ocio.h"
#include "bpy_app_oiio.h"
#include "bpy_app_opensubdiv.h"
#include "bpy_app_openvdb.h"
#include "bpy_app_sdl.h"
#include "bpy_app_usd.h"
#include "bpy_app_build_options.h"

#include "bpy_app_translations.h"

#include "bpy_app_handlers.h"
#include "bpy_driver.h"

/* modules */
#include "bpy_app_icons.h"
#include "bpy_app_timers.h"

#include "BLI_utildefines.h"

#include "BKE_appdir.h"
#include "BKE_blender_version.h"
#include "BKE_global.h"
#include "BKE_library_override.h"

#include "DNA_ID.h"

#include "UI_interface_icons.h"

/* for notifiers */
#include "WM_api.h"
#include "WM_types.h"

#include "../generic/py_capi_utils.h"
#include "../generic/python_utildefines.h"

#ifdef BUILD_DATE
extern char build_date[];
extern char build_time[];
extern unsigned long build_commit_timestamp;
extern char build_commit_date[];
extern char build_commit_time[];
extern char build_hash[];
extern char build_branch[];
extern char build_platform[];
extern char build_type[];
extern char build_cflags[];
extern char build_cxxflags[];
extern char build_linkflags[];
extern char build_system[];
#endif

static PyTypeObject BlenderAppType;

static PyStructSequence_Field app_info_fields[] = {
    {"version", "The Blender version as a tuple of 3 numbers. eg. (2, 50, 11)"},
    {"version_string", "The Blender version formatted as a string"},
    {"version_char", "The Blender version character (for minor releases)"},
    {"version_cycle", "The release status of this build alpha/beta/rc/release"},
    {"binary_path",
     "The location of Blender's executable, useful for utilities that open new instances"},
    {"background",
     "Boolean, True when blender is running without a user interface (started with -b)"},
    {"factory_startup", "Boolean, True when blender is running with --factory-startup)"},

    /* buildinfo */
    {"build_date", "The date this blender instance was built"},
    {"build_time", "The time this blender instance was built"},
    {"build_commit_timestamp", "The unix timestamp of commit this blender instance was built"},
    {"build_commit_date", "The date of commit this blender instance was built"},
    {"build_commit_time", "The time of commit this blender instance was built"},
    {"build_hash", "The commit hash this blender instance was built with"},
    {"build_branch", "The branch this blender instance was built from"},
    {"build_platform", "The platform this blender instance was built for"},
    {"build_type", "The type of build (Release, Debug)"},
    {"build_cflags", "C compiler flags"},
    {"build_cxxflags", "C++ compiler flags"},
    {"build_linkflags", "Binary linking flags"},
    {"build_system", "Build system used"},

    /* submodules */
    {"alembic", "Alembic library information backend"},
    {"usd", "USD library information backend"},
    {"ffmpeg", "FFmpeg library information backend"},
    {"ocio", "OpenColorIO library information backend"},
    {"oiio", "OpenImageIO library information backend"},
    {"opensubdiv", "OpenSubdiv library information backend"},
    {"openvdb", "OpenVDB library information backend"},
    {"sdl", "SDL library information backend"},
    {"build_options", "A set containing most important enabled optional build features"},
    {"handlers", "Application handler callbacks"},
    {"translations", "Application and addons internationalization API"},

    /* Modules (not struct sequence). */
    {"icons", "Manage custom icons"},
    {"timers", "Manage timers"},
    {NULL},
};

PyDoc_STRVAR(bpy_app_doc,
             "This module contains application values that remain unchanged during runtime.\n"
             "\n"
             "Submodules:\n"
             "\n"
             ".. toctree::\n"
             "   :maxdepth: 1\n"
             "\n"
             "   bpy.app.handlers.rst\n"
             "   bpy.app.icons.rst\n"
             "   bpy.app.timers.rst\n"
             "   bpy.app.translations.rst\n");

static PyStructSequence_Desc app_info_desc = {
    "bpy.app",       /* name */
    bpy_app_doc,     /* doc */
    app_info_fields, /* fields */
    ARRAY_SIZE(app_info_fields) - 1,
};

static PyObject *make_app_info(void)
{
  PyObject *app_info;
  int pos = 0;

  app_info = PyStructSequence_New(&BlenderAppType);
  if (app_info == NULL) {
    return NULL;
  }
#define SetIntItem(flag) PyStructSequence_SET_ITEM(app_info, pos++, PyLong_FromLong(flag))
#define SetStrItem(str) PyStructSequence_SET_ITEM(app_info, pos++, PyUnicode_FromString(str))
#define SetBytesItem(str) PyStructSequence_SET_ITEM(app_info, pos++, PyBytes_FromString(str))
#define SetObjItem(obj) PyStructSequence_SET_ITEM(app_info, pos++, obj)

  SetObjItem(PyC_Tuple_Pack_I32(BLENDER_VERSION / 100, BLENDER_VERSION % 100, BLENDER_SUBVERSION));
  SetObjItem(PyUnicode_FromFormat(
      "%d.%02d (sub %d)", BLENDER_VERSION / 100, BLENDER_VERSION % 100, BLENDER_SUBVERSION));

  SetStrItem(STRINGIFY(BLENDER_VERSION_CHAR));
  SetStrItem(STRINGIFY(BLENDER_VERSION_CYCLE));
  SetStrItem(BKE_appdir_program_path());
  SetObjItem(PyBool_FromLong(G.background));
  SetObjItem(PyBool_FromLong(G.factory_startup));

  /* build info, use bytes since we can't assume _any_ encoding:
   * see patch [#30154] for issue */
#ifdef BUILD_DATE
  SetBytesItem(build_date);
  SetBytesItem(build_time);
  SetIntItem(build_commit_timestamp);
  SetBytesItem(build_commit_date);
  SetBytesItem(build_commit_time);
  SetBytesItem(build_hash);
  SetBytesItem(build_branch);
  SetBytesItem(build_platform);
  SetBytesItem(build_type);
  SetBytesItem(build_cflags);
  SetBytesItem(build_cxxflags);
  SetBytesItem(build_linkflags);
  SetBytesItem(build_system);
#else
  SetBytesItem("Unknown");
  SetBytesItem("Unknown");
  SetIntItem(0);
  SetBytesItem("Unknown");
  SetBytesItem("Unknown");
  SetBytesItem("Unknown");
  SetBytesItem("Unknown");
  SetBytesItem("Unknown");
  SetBytesItem("Unknown");
  SetBytesItem("Unknown");
  SetBytesItem("Unknown");
  SetBytesItem("Unknown");
  SetBytesItem("Unknown");
#endif

  SetObjItem(BPY_app_alembic_struct());
  SetObjItem(BPY_app_usd_struct());
  SetObjItem(BPY_app_ffmpeg_struct());
  SetObjItem(BPY_app_ocio_struct());
  SetObjItem(BPY_app_oiio_struct());
  SetObjItem(BPY_app_opensubdiv_struct());
  SetObjItem(BPY_app_openvdb_struct());
  SetObjItem(BPY_app_sdl_struct());
  SetObjItem(BPY_app_build_options_struct());
  SetObjItem(BPY_app_handlers_struct());
  SetObjItem(BPY_app_translations_struct());

  /* modules */
  SetObjItem(BPY_app_icons_module());
  SetObjItem(BPY_app_timers_module());

#undef SetIntItem
#undef SetStrItem
#undef SetBytesItem
#undef SetObjItem

  if (PyErr_Occurred()) {
    Py_CLEAR(app_info);
    return NULL;
  }
  return app_info;
}

/* a few getsets because it makes sense for them to be in bpy.app even though
 * they are not static */

PyDoc_STRVAR(
    bpy_app_debug_doc,
    "Boolean, for debug info (started with --debug / --debug_* matching this attribute name)");
static PyObject *bpy_app_debug_get(PyObject *UNUSED(self), void *closure)
{
  const int flag = POINTER_AS_INT(closure);
  return PyBool_FromLong(G.debug & flag);
}

static int bpy_app_debug_set(PyObject *UNUSED(self), PyObject *value, void *closure)
{
  const int flag = POINTER_AS_INT(closure);
  const int param = PyObject_IsTrue(value);

  if (param == -1) {
    PyErr_SetString(PyExc_TypeError, "bpy.app.debug can only be True/False");
    return -1;
  }

  if (param) {
    G.debug |= flag;
  }
  else {
    G.debug &= ~flag;
  }

  return 0;
}

PyDoc_STRVAR(
    bpy_app_global_flag_doc,
    "Boolean, for application behavior (started with --enable-* matching this attribute name)");
static PyObject *bpy_app_global_flag_get(PyObject *UNUSED(self), void *closure)
{
  const int flag = POINTER_AS_INT(closure);
  return PyBool_FromLong(G.f & flag);
}

static int bpy_app_global_flag_set(PyObject *UNUSED(self), PyObject *value, void *closure)
{
  const int flag = POINTER_AS_INT(closure);
  const int param = PyObject_IsTrue(value);

  if (param == -1) {
    PyErr_SetString(PyExc_TypeError, "bpy.app.use_* can only be True/False");
    return -1;
  }

  if (param) {
    G.f |= flag;
  }
  else {
    G.f &= ~flag;
  }

  return 0;
}

static int bpy_app_global_flag_set__only_disable(PyObject *UNUSED(self),
                                                 PyObject *value,
                                                 void *closure)
{
  const int param = PyObject_IsTrue(value);
  if (param == 1) {
    PyErr_SetString(PyExc_ValueError, "This bpy.app.use_* option can only be disabled");
    return -1;
  }
  return bpy_app_global_flag_set(NULL, value, closure);
}

#define BROKEN_BINARY_PATH_PYTHON_HACK

PyDoc_STRVAR(bpy_app_binary_path_python_doc,
             "String, the path to the python executable (read-only)");
static PyObject *bpy_app_binary_path_python_get(PyObject *self, void *UNUSED(closure))
{
  /* refcount is held in BlenderAppType.tp_dict */
  static PyObject *ret = NULL;

  if (ret == NULL) {
    /* only run once */
    char fullpath[1024];
    BKE_appdir_program_python_search(
        fullpath, sizeof(fullpath), PY_MAJOR_VERSION, PY_MINOR_VERSION);
    ret = PyC_UnicodeFromByte(fullpath);
#ifdef BROKEN_BINARY_PATH_PYTHON_HACK
    Py_INCREF(ret);
    UNUSED_VARS(self);
#else
    PyDict_SetItem(
        BlenderAppType.tp_dict,
        /* XXX BAAAADDDDDD! self is not a PyDescr at all! it's bpy.app!!! */ PyDescr_NAME(self),
        ret);
#endif
  }
  else {
    Py_INCREF(ret);
  }

  return ret;
}

PyDoc_STRVAR(bpy_app_debug_value_doc,
             "Short, number which can be set to non-zero values for testing purposes");
static PyObject *bpy_app_debug_value_get(PyObject *UNUSED(self), void *UNUSED(closure))
{
  return PyLong_FromLong(G.debug_value);
}

static int bpy_app_debug_value_set(PyObject *UNUSED(self), PyObject *value, void *UNUSED(closure))
{
  short param = PyC_Long_AsI16(value);

  if (param == -1 && PyErr_Occurred()) {
    PyC_Err_SetString_Prefix(PyExc_TypeError,
                             "bpy.app.debug_value can only be set to a whole number");
    return -1;
  }

  G.debug_value = param;

  WM_main_add_notifier(NC_WINDOW, NULL);

  return 0;
}

PyDoc_STRVAR(bpy_app_tempdir_doc, "String, the temp directory used by blender (read-only)");
static PyObject *bpy_app_tempdir_get(PyObject *UNUSED(self), void *UNUSED(closure))
{
  return PyC_UnicodeFromByte(BKE_tempdir_session());
}

PyDoc_STRVAR(
    bpy_app_driver_dict_doc,
    "Dictionary for drivers namespace, editable in-place, reset on file load (read-only)");
static PyObject *bpy_app_driver_dict_get(PyObject *UNUSED(self), void *UNUSED(closure))
{
  if (bpy_pydriver_Dict == NULL) {
    if (bpy_pydriver_create_dict() != 0) {
      PyErr_SetString(PyExc_RuntimeError, "bpy.app.driver_namespace failed to create dictionary");
      return NULL;
    }
  }

  return Py_INCREF_RET(bpy_pydriver_Dict);
}

PyDoc_STRVAR(bpy_app_preview_render_size_doc,
             "Reference size for icon/preview renders (read-only)");
static PyObject *bpy_app_preview_render_size_get(PyObject *UNUSED(self), void *closure)
{
  return PyLong_FromLong((long)UI_preview_render_size(POINTER_AS_INT(closure)));
}

static PyObject *bpy_app_autoexec_fail_message_get(PyObject *UNUSED(self), void *UNUSED(closure))
{
  return PyC_UnicodeFromByte(G.autoexec_fail);
}

PyDoc_STRVAR(bpy_app_use_override_library_doc,
             "Boolean, whether library override is exposed in UI or not.");
static PyObject *bpy_app_use_override_library_get(PyObject *UNUSED(self), void *UNUSED(closure))
{
  return PyBool_FromLong((long)BKE_override_library_is_enabled());
}

static int bpy_app_use_override_library_set(PyObject *UNUSED(self),
                                            PyObject *value,
                                            void *UNUSED(closure))
{
  const int param = PyC_Long_AsBool(value);

  if (param == -1 && PyErr_Occurred()) {
    PyErr_SetString(PyExc_TypeError, "bpy.app.use_override_library must be a boolean");
    return -1;
  }

  BKE_override_library_enable((const bool)param);

  return 0;
}

static PyGetSetDef bpy_app_getsets[] = {
    {"debug", bpy_app_debug_get, bpy_app_debug_set, bpy_app_debug_doc, (void *)G_DEBUG},
    {"debug_ffmpeg",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_FFMPEG},
    {"debug_freestyle",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_FREESTYLE},
    {"debug_python",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_PYTHON},
    {"debug_events",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_EVENTS},
    {"debug_handlers",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_HANDLERS},
    {"debug_wm", bpy_app_debug_get, bpy_app_debug_set, bpy_app_debug_doc, (void *)G_DEBUG_WM},
    {"debug_depsgraph",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_DEPSGRAPH},
    {"debug_depsgraph_build",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_DEPSGRAPH_BUILD},
    {"debug_depsgraph_eval",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_DEPSGRAPH_EVAL},
    {"debug_depsgraph_tag",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_DEPSGRAPH_TAG},
    {"debug_depsgraph_time",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_DEPSGRAPH_TIME},
    {"debug_depsgraph_pretty",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_DEPSGRAPH_PRETTY},
    {"debug_simdata",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_SIMDATA},
    {"debug_gpumem",
     bpy_app_debug_get,
     bpy_app_debug_set,
     bpy_app_debug_doc,
     (void *)G_DEBUG_GPU_MEM},
    {"debug_io", bpy_app_debug_get, bpy_app_debug_set, bpy_app_debug_doc, (void *)G_DEBUG_IO},

    {"use_override_library",
     bpy_app_use_override_library_get,
     bpy_app_use_override_library_set,
     bpy_app_use_override_library_doc,
     NULL},
    {"use_event_simulate",
     bpy_app_global_flag_get,
     bpy_app_global_flag_set__only_disable,
     bpy_app_global_flag_doc,
     (void *)G_FLAG_EVENT_SIMULATE},

    {"use_userpref_skip_save_on_exit",
     bpy_app_global_flag_get,
     bpy_app_global_flag_set,
     bpy_app_global_flag_doc,
     (void *)G_FLAG_USERPREF_NO_SAVE_ON_EXIT},

    {"binary_path_python",
     bpy_app_binary_path_python_get,
     NULL,
     bpy_app_binary_path_python_doc,
     NULL},

    {"debug_value",
     bpy_app_debug_value_get,
     bpy_app_debug_value_set,
     bpy_app_debug_value_doc,
     NULL},
    {"tempdir", bpy_app_tempdir_get, NULL, bpy_app_tempdir_doc, NULL},
    {"driver_namespace", bpy_app_driver_dict_get, NULL, bpy_app_driver_dict_doc, NULL},

    {"render_icon_size",
     bpy_app_preview_render_size_get,
     NULL,
     bpy_app_preview_render_size_doc,
     (void *)ICON_SIZE_ICON},
    {"render_preview_size",
     bpy_app_preview_render_size_get,
     NULL,
     bpy_app_preview_render_size_doc,
     (void *)ICON_SIZE_PREVIEW},

    /* security */
    {"autoexec_fail", bpy_app_global_flag_get, NULL, NULL, (void *)G_FLAG_SCRIPT_AUTOEXEC_FAIL},
    {"autoexec_fail_quiet",
     bpy_app_global_flag_get,
     NULL,
     NULL,
     (void *)G_FLAG_SCRIPT_AUTOEXEC_FAIL_QUIET},
    {"autoexec_fail_message", bpy_app_autoexec_fail_message_get, NULL, NULL, NULL},
    {NULL, NULL, NULL, NULL, NULL},
};

static void py_struct_seq_getset_init(void)
{
  /* tricky dynamic members, not to py-spec! */
  for (PyGetSetDef *getset = bpy_app_getsets; getset->name; getset++) {
    PyObject *item = PyDescr_NewGetSet(&BlenderAppType, getset);
    PyDict_SetItem(BlenderAppType.tp_dict, PyDescr_NAME(item), item);
    Py_DECREF(item);
  }
}
/* end dynamic bpy.app */

PyObject *BPY_app_struct(void)
{
  PyObject *ret;

  PyStructSequence_InitType(&BlenderAppType, &app_info_desc);

  ret = make_app_info();

  /* prevent user from creating new instances */
  BlenderAppType.tp_init = NULL;
  BlenderAppType.tp_new = NULL;
  BlenderAppType.tp_hash = (hashfunc)
      _Py_HashPointer; /* without this we can't do set(sys.modules) [#29635] */

  /* kindof a hack ontop of PyStructSequence */
  py_struct_seq_getset_init();

  return ret;
}