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# Source code for betty.locale.translation

    """
    Manage translations of built-in translatable strings.
    """

    from __future__ import annotations

    import logging
    from contextlib import redirect_stdout
    from io import StringIO
    from pathlib import Path

    from aiofiles.os import makedirs
    from aiofiles.ospath import exists
    from betty import fs
    from betty.locale import get_data
    from betty.locale.babel import run_babel
    from typing import TYPE_CHECKING

    if TYPE_CHECKING:
        from betty.project import Project

    async def new_project_translation(locale: str, project: Project) -> None:
        """
        Create a new translation for the given project.
        """
        await _new_translation(locale, project.configuration.assets_directory_path)

    async def new_dev_translation(locale: str) -> None:
        """
        Create a new translation for Betty itself.
        """
        await _new_translation(locale, fs.ASSETS_DIRECTORY_PATH)

    async def _new_translation(locale: str, assets_directory_path: Path) -> None:
        po_file_path = assets_directory_path / "locale" / locale / "betty.po"
        with redirect_stdout(StringIO()):
            if await exists(po_file_path):
                logging.getLogger(__name__).info(
                    f"Translations for {locale} already exist at {po_file_path}."
                )
                return

            locale_data = get_data(locale)
            await run_babel(
                "",
                "init",
                "--no-wrap",
                "-i",
                str(assets_directory_path / "betty.pot"),
                "-o",
                str(po_file_path),
                "-l",
                str(locale_data),
                "-D",
                "betty",
            )
            logging.getLogger(__name__).info(
                f"Translations for {locale} initialized at {po_file_path}."
            )

    async def update_project_translations(
        project: Project,
        source_paths: set[Path] | None = None,
        *,
        _output_assets_directory_path_override: Path | None = None,
    ) -> None:
        """
        Update the translations for the given project.
        """
        if source_paths is None:
            source_paths = set()
        source_paths.add(project.configuration.assets_directory_path)
        source_file_paths = set()
        for source_path in source_paths:
            for file_path in source_path.expanduser().resolve().rglob("*"):
                source_file_paths.add(source_path / file_path)
        await _update_translations(
            source_file_paths,
            project.configuration.assets_directory_path,
            _output_assets_directory_path_override,
        )

    async def update_dev_translations(
        *,
        _output_assets_directory_path_override: Path | None = None,
    ) -> None:
        """
        Update the translations for Betty itself.
        """
        source_directory_path = fs.ROOT_DIRECTORY_PATH / "betty"
        test_directory_path = source_directory_path / "tests"
        source_file_paths = {
            source_directory_path / source_file_path
            for source_file_path in source_directory_path.rglob("*")
            # Remove the tests directory from the extraction, or we'll
            # be seeing some unusual additions to the translations.
            if test_directory_path not in source_file_path.parents
        }
        await _update_translations(
            source_file_paths,
            fs.ASSETS_DIRECTORY_PATH,
            _output_assets_directory_path_override,
        )

    async def _update_translations(
        source_paths: set[Path],
        assets_directory_path: Path,
        _output_assets_directory_path_override: Path | None = None,
    ) -> None:
        """
        Update all existing translations based on changes in translatable strings.
        """
        # During production, the input and output paths are identical. During testing,
        # _output_assets_directory_path provides an alternative output, so the changes
        # to the translations can be tested in isolation.
        output_assets_directory_path = (
            _output_assets_directory_path_override or assets_directory_path
        )

        source_paths = {
            source_path
            for source_path in source_paths
            if source_path.suffix in (".j2", ".py")
        }

        pot_file_path = output_assets_directory_path / "betty.pot"
        await run_babel(
            "",
            "extract",
            "--no-location",
            "--no-wrap",
            "--sort-output",
            "-F",
            "babel.ini",
            "-o",
            str(pot_file_path),
            "--project",
            "Betty",
            "--copyright-holder",
            "Bart Feenstra & contributors",
            *map(str, source_paths),
        )
        for input_po_file_path in Path(assets_directory_path).glob("locale/*/betty.po"):
            output_po_file_path = (
                output_assets_directory_path
                / input_po_file_path.relative_to(assets_directory_path)
            ).resolve()
            await makedirs(output_po_file_path.parent, exist_ok=True)
            output_po_file_path.touch()

            locale = output_po_file_path.parent.name
            locale_data = get_data(locale)
            await run_babel(
                "",
                "update",
                "-i",
                str(pot_file_path),
                "-o",
                str(output_po_file_path),
                "-l",
                str(locale_data),
                "-D",
                "betty",
            )