import importlib.util
import sys
import types
from pathlib import Path


REPO_ROOT = Path(__file__).resolve().parents[1]
SRC_ROOT = REPO_ROOT / "src"
BUILD_PACKAGE_ROOT = REPO_ROOT / "_build" / "src" / "cthulhu"


def _load_generated_module(module_name):
    module_path = BUILD_PACKAGE_ROOT / f"{module_name}.py"
    full_name = f"cthulhu.{module_name}"

    if module_path.exists():
        spec = importlib.util.spec_from_file_location(full_name, module_path)
        module = importlib.util.module_from_spec(spec)
        sys.modules[full_name] = module
        spec.loader.exec_module(module)
        return module

    module = types.ModuleType(full_name)
    if module_name == "cthulhu_i18n":
        module._ = lambda text: text
        module.ngettext = lambda singular, plural, count: singular if count == 1 else plural
        module.cgettext = lambda text: text
        module.C_ = lambda _context, text: text
        module.localedir = str(REPO_ROOT / "po")
        module.setModuleLocale = lambda *_args, **_kwargs: None
        module.setLocaleForMessages = lambda *_args, **_kwargs: None
        module.setLocaleForNames = lambda *_args, **_kwargs: None
        module.setLocaleForGUI = lambda *_args, **_kwargs: None
        return module

    if module_name == "cthulhu_platform":
        from cthulhu import cthulhuVersion

        module.version = (
            f"Cthulhu screen reader version "
            f"{cthulhuVersion.version}-{cthulhuVersion.codeName}"
        )
        module.revision = ""
        module.prefix = str(REPO_ROOT)
        module.package = "cthulhu"
        module.datadir = str(REPO_ROOT)
        module.tablesdir = "/usr/share/liblouis/tables"
        return module

    raise ImportError(f"Unsupported generated module: {module_name}")


if str(SRC_ROOT) not in sys.path:
    sys.path.insert(0, str(SRC_ROOT))

import cthulhu  # noqa: E402


for generated_module in ("cthulhu_i18n", "cthulhu_platform"):
    if f"cthulhu.{generated_module}" in sys.modules:
        continue

    loaded_module = _load_generated_module(generated_module)
    sys.modules[f"cthulhu.{generated_module}"] = loaded_module
    setattr(cthulhu, generated_module, loaded_module)