"""A collection of functions which are triggered automatically by finder when
zoneinfo package is included.
"""

from __future__ import annotations

from pathlib import Path
from textwrap import dedent
from typing import TYPE_CHECKING

if TYPE_CHECKING:
    from cx_Freeze.finder import ModuleFinder
    from cx_Freeze.module import Module


def load_zoneinfo(finder: ModuleFinder, module: Module) -> None:
    """The zoneinfo package requires timezone data,
    that can be the in tzdata package, if installed.
    """
    module.global_names.add("TZPATH")
    try:
        finder.include_package("tzdata")
        target_path = "lib/tzdata/zoneinfo"
    except ImportError:
        target_path = None

    if target_path is None:
        # without tzdata, copy zoneinfo directory if available
        source_path = None
        zoneinfo = __import__(module.name, fromlist=["TZPATH"])
        if zoneinfo.TZPATH:
            for path in zoneinfo.TZPATH:
                if path.endswith("zoneinfo"):
                    source_path = Path(path).resolve()
                    break
        if source_path is None or not source_path.is_dir():
            # add tzdata to missing modules
            bad_modules = finder._bad_modules  # noqa: SLF001
            callers = bad_modules.setdefault("tzdata", {})
            callers[f"{module.name}_hook"] = None
            return
        if module.in_file_system == 0:
            finder.zip_include_files(source_path, "tzdata/zoneinfo")
            return
        target_path = "share/zoneinfo"
        finder.include_files(
            source_path, target_path, copy_dependent_files=False
        )

    # patch source code
    if module.file.suffix == ".pyc":  # source unavailable
        return

    source = f"""
        # cx_Freeze patch start
        import os as _os
        import sys as _sys
        _prefix = _sys.prefix if _sys.prefix else _sys.frozen_dir
        if _sys.platform == "darwin":
            _mac_prefix = _os.path.join(_os.path.dirname(_prefix), "Resources")
            if _os.path.exists(_mac_prefix):
                _prefix = _mac_prefix  # using bdist_mac
        _os.environ["PYTHONTZPATH"] = _os.path.join(
            _prefix, _os.path.normpath("{target_path}")
        )
        # cx_Freeze patch end
    """
    code_string = module.file.read_text(encoding="utf_8")
    module.code = compile(
        dedent(source) + code_string,
        module.file.as_posix(),
        "exec",
        dont_inherit=True,
        optimize=finder.optimize,
    )


__all__ = ["load_zoneinfo"]