# lib9p/protogen/__init__.py - Generate C marshalers/unmarshalers for
#                              .9p files defining 9P protocol variants
#
# Copyright (C) 2024-2025  Luke T. Shumaker <lukeshu@lukeshu.com>
# SPDX-License-Identifier: AGPL-3.0-or-later

import os.path
import sys
import typing

import idl

from . import c, h

# pylint: disable=unused-variable
__all__ = ["main"]


def main() -> None:
    if typing.TYPE_CHECKING:

        class ANSIColors:
            MAGENTA = "\x1b[35m"
            RED = "\x1b[31m"
            RESET = "\x1b[0m"

    else:
        from _colorize import ANSIColors  # Present in Python 3.13+

    if len(sys.argv) < 2:
        raise ValueError("requires at least 1 .9p filename")
    parser = idl.Parser()
    for txtname in sys.argv[1:]:
        try:
            parser.parse_file(txtname)
        except SyntaxError as e:
            print(
                f"{ANSIColors.RED}{e.filename}{ANSIColors.RESET}:{ANSIColors.MAGENTA}{e.lineno}{ANSIColors.RESET}: {e.msg}",
                file=sys.stderr,
            )
            assert e.text
            print(f"\t{e.text}", file=sys.stderr)
            text_suffix = e.text.lstrip()
            text_prefix = e.text[: -len(text_suffix)]
            print(
                f"\t{text_prefix}{ANSIColors.RED}{'~'*len(text_suffix)}{ANSIColors.RESET}",
                file=sys.stderr,
            )
            sys.exit(2)
    versions, typs = parser.all()
    outdir = os.path.normpath(os.path.join(sys.argv[0], ".."))
    with open(
        os.path.join(outdir, "include/lib9p/9p.generated.h"), "w", encoding="utf-8"
    ) as fh:
        fh.write(h.gen_h(versions, typs))
    with open(os.path.join(outdir, "9p.generated.c"), "w", encoding="utf-8") as fh:
        fh.write(c.gen_c(versions, typs))