#!/usr/bin/env python3
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#  or more contributor license agreements.  See the NOTICE file
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#  to you under the Apache License, Version 2.0 (the
#  "License"); you may not use this file except in compliance
#  with the License.  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
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"""HRW4U script - Process HRW4U input and produce output (AST or HRW)."""

from __future__ import annotations

import argparse
import os
from pathlib import Path
from typing import Any

from hrw4u.hrw4uLexer import hrw4uLexer
from hrw4u.hrw4uParser import hrw4uParser
from hrw4u.visitor import HRW4UVisitor
from hrw4u.common import run_main
from hrw4u.sandbox import SandboxConfig


def _add_args(parser: argparse.ArgumentParser, output_group: argparse._MutuallyExclusiveGroup) -> None:
    output_group.add_argument(
        "--output",
        choices=["hrw", "hrw4u"],
        default="hrw",
        help="Output format: hrw (header_rewrite, default) or hrw4u (expand procedures inline)")
    parser.add_argument(
        "--procedures-path",
        metavar="DIR[:DIR...]",
        dest="procedures_path",
        default="",
        help="Colon-separated list of directories to search for procedure files")
    parser.add_argument("--sandbox", metavar="FILE", type=Path, help="Path to sandbox YAML configuration file")


def _visitor_kwargs(args: argparse.Namespace) -> dict[str, Any]:
    kwargs: dict[str, Any] = {}
    if args.procedures_path:
        kwargs['proc_search_paths'] = [Path(p) for p in args.procedures_path.split(os.pathsep) if p]
    if args.sandbox:
        kwargs['sandbox'] = SandboxConfig.load(args.sandbox)
    return kwargs


def main() -> None:
    """Main entry point for the hrw4u script."""
    run_main(
        description="Process HRW4U input and produce output (AST or HRW).",
        lexer_class=hrw4uLexer,
        parser_class=hrw4uParser,
        visitor_class=HRW4UVisitor,
        error_prefix="hrw4u",
        output_flag_name="hrw",
        output_flag_help="Produce the HRW output (default)",
        add_args=_add_args,
        visitor_kwargs=_visitor_kwargs)


if __name__ == "__main__":
    main()
