#!/usr/bin/env python3
"""Project ledger.yaml into notes/sections/symbols.tex and optional claims.md."""

from __future__ import annotations

import argparse
import sys
from pathlib import Path

import yaml


def tex_escape(text: str) -> str:
    return (
        text.replace("\\", "\\textbackslash{}")
        .replace("&", "\\&")
        .replace("%", "\\%")
        .replace("#", "\\#")
        .replace("_", "\\_")
    )


def render(work: Path) -> None:
    ledger = yaml.safe_load((work / "ledger.yaml").read_text(encoding="utf-8"))
    symbols = ledger.get("symbols") or []
    claims = ledger.get("claims") or []
    sec = work / "notes" / "sections"
    sec.mkdir(parents=True, exist_ok=True)
    lines = [
        "% generated by render_ledger.py — do not edit",
        "\\begin{itemize}",
    ]
    if not symbols:
        lines.append("\\item （无符号）")
    for sym in symbols:
        name = tex_escape(str(sym.get("name", "")))
        meaning = tex_escape(str(sym.get("meaning", "")))
        kind = tex_escape(str(sym.get("kind", "")))
        latex = sym.get("latex") or name
        lines.append(f"\\item ${latex}$ — {meaning} （{kind}；{name}）")
    lines.append("\\end{itemize}")
    (sec / "symbols.tex").write_text("\n".join(lines) + "\n", encoding="utf-8")

    md = ["# Claims", ""]
    for c in claims:
        md.append(f"- `{c.get('id')}` ({c.get('status')}): {c.get('text')}")
    (work / "claims.md").write_text("\n".join(md) + "\n", encoding="utf-8")


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--work", required=False)
    parser.add_argument("--out", dest="work")
    args = parser.parse_args()
    if not args.work:
        print("usage: render_ledger.py --work <dir>", file=sys.stderr)
        return 2
    work = Path(args.work).resolve()
    if not (work / "ledger.yaml").is_file():
        print(f"no ledger at {work / 'ledger.yaml'}", file=sys.stderr)
        return 2
    render(work)
    return 0


if __name__ == "__main__":
    sys.exit(main())