"""mass font extractor"""

from pathlib import Path
from shutil import copy2
from sys import argv
from shutil import get_terminal_size


# sources: source font zip files are
# sources/ext: extracted content of source/*.zip
# pre: files that have already been extracted previously
# files: the output dir
SOURCES_DIR: Path = Path(__file__).parent.joinpath('sources')
SOURCES_EXT_DIR: Path = SOURCES_DIR.joinpath('ext')
PRE_DIR: Path = Path(__file__).parent.joinpath('pre')
FILES_DIR: Path = Path(__file__).parent.joinpath('files')


def chkdir(path: Path) -> None:
    path.mkdir(parents=True, exist_ok=True)
    assert path.exists()


def main():
    # check
    chkdir(SOURCES_DIR)
    assert SOURCES_EXT_DIR.exists(), "sources/ext does not exist - extract sources/*.zip files into sources/ext/*"
    chkdir(FILES_DIR)

    pre_exists: bool = PRE_DIR.exists()
    tracking: list[str] = []

    # get terminal size, if possible
    col: int = 0
    lns: int = 0
    try:
        col, lns = get_terminal_size()
    except Exception:
        col, lns = 0, 0

    # recursively iterate through SOURCES_EXT_DIR
    for path in SOURCES_EXT_DIR.rglob('*'):
        # if it is an otf or ttf file, copy just the file to FILES_DIR
        if path.is_file() and path.suffix in ['.otf', '.ttf']:
            # if the file starts with a dot, skip
            if path.stem.startswith('.'):
                if "-v" in argv:
                    print(f"{path.relative_to(SOURCES_DIR)} (skipped)")
                continue

            # if we already copied either its otf or ttf counterpart, skip
            if path.stem in tracking:

                continue
            else:
                tracking.append(path.stem)
            dest = FILES_DIR.joinpath(path.name)
            copy2(path, dest)

            # print 'path' and 'dest' in a short format
            if "-v" in argv:
                print(f"{str(path.relative_to(SOURCES_DIR.parent))} -> {str(dest.relative_to(FILES_DIR.parent))}")
            else:
                print(f"\r{str(dest.relative_to(FILES_DIR.parent)).ljust(col)}", end="")
    else:
        print()

    # if PRE_DIR exists, recursively iterate through it and then see
    # what files in the PRE_DIR are not in PRE_DIR
    if pre_exists:
        for path in PRE_DIR.rglob('*'):
            if path.is_file() and path.suffix in ['.otf', '.ttf']:
                if path.stem not in tracking:
                    print(f"!!! pre file '{path}' is unique")

    print(f"copied {len(tracking)} files to {FILES_DIR}")


if __name__ == "__main__":
    main()