#     Copyright 2016, Kay Hayen, mailto:kay.hayen@gmail.com
#
#     Part of "Nuitka", an optimizing Python compiler that is compatible and
#     integrates with CPython, but also works on its own.
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.
#
""" Main module code templates

This for the main program in case of executables, the module templates and
stuff related to importing, and of course the generated code license.

"""

template_global_copyright = """\
/* Generated code for Python source for module '%(name)s'
 * created by Nuitka version %(version)s
 *
 * This code is in part copyright %(year)s Kay Hayen.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
"""
template_module_body_template = """
#include "nuitka/prelude.h"

#include "__helpers.h"

/* The _module_%(module_identifier)s is a Python object pointer of module type. */

/* Note: For full compatibility with CPython, every module variable access
 * needs to go through it except for cases where the module cannot possibly
 * have changed in the mean time.
 */

PyObject *module_%(module_identifier)s;
PyDictObject *moduledict_%(module_identifier)s;

/* The module constants used, if any. */
%(constant_decl_codes)s

static bool constants_created = false;

static void createModuleConstants( void )
{
%(constant_init_codes)s

    constants_created = true;
}

#ifndef __NUITKA_NO_ASSERT__
void checkModuleConstants_%(module_identifier)s( void )
{
    // The module may not have been used at all.
    if (constants_created == false) return;

%(constant_check_codes)s
}
#endif

// The module code objects.
%(module_code_objects_decl)s

static void createModuleCodeObjects(void)
{
%(module_code_objects_init)s
}

// The module function declarations.
%(module_functions_decl)s

// The module function definitions.
%(module_functions_code)s


#if PYTHON_VERSION >= 300
static struct PyModuleDef mdef_%(module_identifier)s =
{
    PyModuleDef_HEAD_INIT,
    "%(module_name)s",   /* m_name */
    NULL,                /* m_doc */
    -1,                  /* m_size */
    NULL,                /* m_methods */
    NULL,                /* m_reload */
    NULL,                /* m_traverse */
    NULL,                /* m_clear */
    NULL,                /* m_free */
  };
#endif

#if PYTHON_VERSION >= 300
extern PyObject *metapath_based_loader;
#endif

extern void _initCompiledCellType();
extern void _initCompiledGeneratorType();
extern void _initCompiledFunctionType();
extern void _initCompiledMethodType();
extern void _initCompiledFrameType();
#if PYTHON_VERSION >= 350
extern void _initCompiledCoroutineType();
extern void _initCompiledCoroutineWrapperType();
#endif

// The exported interface to CPython. On import of the module, this function
// gets called. It has to have an exact function name, in cases it's a shared
// library export. This is hidden behind the MOD_INIT_DECL.

MOD_INIT_DECL( %(module_identifier)s )
{
#if defined(_NUITKA_EXE) || PYTHON_VERSION >= 300
    static bool _init_done = false;

    // Modules might be imported repeatedly, which is to be ignored.
    if ( _init_done )
    {
        return MOD_RETURN_VALUE( module_%(module_identifier)s );
    }
    else
    {
        _init_done = true;
    }
#endif

#ifdef _NUITKA_MODULE
    // In case of a stand alone extension module, need to call initialization
    // the init here because that's the first and only time we are going to get
    // called here.

    // Initialize the constant values used.
    _initBuiltinModule();
    createGlobalConstants();

    /* Initialize the compiled types of Nuitka. */
    _initCompiledCellType();
    _initCompiledGeneratorType();
    _initCompiledFunctionType();
    _initCompiledMethodType();
    _initCompiledFrameType();

#if PYTHON_VERSION >= 350
    _initCompiledCoroutineType();
    _initCompiledCoroutineWrapperType();
#endif

#if PYTHON_VERSION < 300
    _initSlotCompare();
#endif
#if PYTHON_VERSION >= 270
    _initSlotIternext();
#endif

    patchBuiltinModule();
    patchTypeComparison();

    // Enable meta path based loader if not already done.
    setupMetaPathBasedLoader();

#if PYTHON_VERSION >= 300
    patchInspectModule();
#endif

#endif

    /* The constants only used by this module are created now. */
#ifdef _NUITKA_TRACE
    puts("%(module_name)s: Calling createModuleConstants().");
#endif
    createModuleConstants();

    /* The code objects used by this module are created now. */
#ifdef _NUITKA_TRACE
    puts("%(module_name)s: Calling createModuleCodeObjects().");
#endif
    createModuleCodeObjects();

    // puts( "in init%(module_identifier)s" );

    // Create the module object first. There are no methods initially, all are
    // added dynamically in actual code only.  Also no "__doc__" is initially
    // set at this time, as it could not contain NUL characters this way, they
    // are instead set in early module code.  No "self" for modules, we have no
    // use for it.
#if PYTHON_VERSION < 300
    module_%(module_identifier)s = Py_InitModule4(
        "%(module_name)s",       // Module Name
        NULL,                    // No methods initially, all are added
                                 // dynamically in actual module code only.
        NULL,                    // No __doc__ is initially set, as it could
                                 // not contain NUL this way, added early in
                                 // actual code.
        NULL,                    // No self for modules, we don't use it.
        PYTHON_API_VERSION
    );
#else
    module_%(module_identifier)s = PyModule_Create( &mdef_%(module_identifier)s );
#endif

    moduledict_%(module_identifier)s = (PyDictObject *)((PyModuleObject *)module_%(module_identifier)s)->md_dict;

    CHECK_OBJECT( module_%(module_identifier)s );

// Seems to work for Python2.7 out of the box, but for Python3, the module
// doesn't automatically enter "sys.modules", so do it manually.
#if PYTHON_VERSION >= 300
    {
        int r = PyObject_SetItem( PySys_GetObject( (char *)"modules" ), %(module_name_obj)s, module_%(module_identifier)s );

        assert( r != -1 );
    }
#endif

    // For deep importing of a module we need to have "__builtins__", so we set
    // it ourselves in the same way than CPython does. Note: This must be done
    // before the frame object is allocated, or else it may fail.

    PyObject *module_dict = PyModule_GetDict( module_%(module_identifier)s );

    if ( PyDict_GetItem( module_dict, const_str_plain___builtins__ ) == NULL )
    {
        PyObject *value = (PyObject *)builtin_module;

        // Check if main module, not a dict then.
#if !defined(_NUITKA_EXE) || !%(is_main_module)s
        value = PyModule_GetDict( value );
#endif

#ifndef __NUITKA_NO_ASSERT__
        int res =
#endif
            PyDict_SetItem( module_dict, const_str_plain___builtins__, value );

        assert( res == 0 );
    }

#if PYTHON_VERSION >= 330
    PyDict_SetItem( module_dict, const_str_plain___loader__, metapath_based_loader );
#endif

    // Temp variables if any
%(temps_decl)s

    // Module code.
%(module_code)s

    return MOD_RETURN_VALUE( module_%(module_identifier)s );
%(module_exit)s
"""

template_module_exception_exit = """\
    module_exception_exit:
    RESTORE_ERROR_OCCURRED( exception_type, exception_value, exception_tb );
    return MOD_RETURN_VALUE( NULL );
}"""

template_module_noexception_exit = """\
}"""

template_helper_impl_decl = """\
// This file contains helper functions that are automatically created from
// templates.

#include "nuitka/prelude.h"

extern PyObject *callPythonFunction( PyObject *func, PyObject **args, int count );

"""

template_header_guard = """\
#ifndef %(header_guard_name)s
#define %(header_guard_name)s

%(header_body)s
#endif
"""

from . import TemplateDebugWrapper # isort:skip
TemplateDebugWrapper.checkDebug(globals())
