#     Copyright 2026, Kay Hayen, mailto:kay.hayen@gmail.com find license text at end of file


"""Demotion of compiled modules to bytecode modules."""

import marshal

from nuitka.BytecodeCaching import writeImportedModulesNamesToCache
from nuitka.Bytecodes import compileSourceToBytecode
from nuitka.freezer.ImportDetection import detectEarlyImports
from nuitka.importing.ImportCache import (
    isImportedModuleByName,
    replaceImportedModule,
)
from nuitka.ModuleRegistry import replaceRootModule
from nuitka.nodes.ModuleNodes import makeUncompiledPythonModule
from nuitka.options.Options import isShowProgress, isStandaloneMode
from nuitka.plugins.Hooks import onFrozenModuleBytecode
from nuitka.plugins.Plugins import isTriggerModule, replaceTriggerModule
from nuitka.Tracing import inclusion_logger
from nuitka.utils.FileOperations import getNormalizedPath


def demoteSourceCodeToBytecode(module_name, source_code, filename):
    if isStandaloneMode():
        filename = module_name.asPath() + ".py"

    bytecode = compileSourceToBytecode(source_code, filename)

    bytecode = onFrozenModuleBytecode(
        module_name=module_name, is_package=False, bytecode=bytecode
    )

    return marshal.dumps(bytecode)


def demoteCompiledModuleToBytecode(module):
    """Demote a compiled module to uncompiled (bytecode)."""

    full_name = module.getFullName()
    filename = module.getCompileTimeFilename()

    if isShowProgress():
        inclusion_logger.info(
            "Demoting module '%s' to bytecode from '%s'."
            % (full_name.asString(), filename)
        )

    source_code = module.getSourceCode()

    bytecode = demoteSourceCodeToBytecode(
        module_name=full_name, source_code=source_code, filename=filename
    )

    uncompiled_module = makeUncompiledPythonModule(
        module_name=full_name,
        reason=module.reason,
        filename=getNormalizedPath(filename),
        bytecode=bytecode,
        is_package=module.isCompiledPythonPackage(),
        technical=full_name in detectEarlyImports(),
    )

    used_modules = module.getUsedModules()
    uncompiled_module.setUsedModules(used_modules)

    distribution_names = module.getUsedDistributions()
    uncompiled_module.setUsedDistributions(distribution_names)

    module.finalize()

    if isImportedModuleByName(full_name):
        replaceImportedModule(old=module, new=uncompiled_module)
    replaceRootModule(old=module, new=uncompiled_module)

    if isTriggerModule(module):
        replaceTriggerModule(old=module, new=uncompiled_module)

    writeImportedModulesNamesToCache(
        module_name=full_name,
        source_code=source_code,
        used_modules=used_modules,
        distribution_names=distribution_names,
    )


#     Part of "Nuitka", an optimizing Python compiler that is compatible and
#     integrates with CPython, but also works on its own.
#
#     Licensed under the GNU Affero General Public License, Version 3 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#        https://www.gnu.org/licenses/agpl-3.0.txt
#
#     See also: "Nuitka Runtime Library Exception, Version 1.0" in file
#     "LICENSE-RUNTIME.txt" for additional permissions granted under Section 7.
#
#     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.
