"""B07 횡단 덧그림 서버 묶음(`b07-extent`)이 화면 코드를 끌지 않음 (574-1).

묶음 입구에서 값 import 를 따라가 닿는 TS 파일에 확인 창 · CAD · 상세 창 · API ·
부품 상자 · B06 허브(`_UI_Cross_Design`)가 없어야 함. `import type` 은 지워지므로 뺌.
"""

import re
from pathlib import Path

ROOT = Path(__file__).resolve().parents[2]
ENTRY = ROOT / "B07_DesignDetail" / "B07_DesignDetail_Cross_Extent_Node.ts"
ALIAS = {"@util/": ROOT / "common_util", "@ui/": ROOT / "ui_template"}
_IMPORT = re.compile(
    r"^\s*(?:import|export)\s+(type\s+)?(?:([^;]*?)\s+from\s+)?[\"']([^\"']+)[\"']",
    re.M | re.S,
)
FORBIDDEN = re.compile(
    r"ui_template|_Cad|Cross_Detail|_Api_|B06_Section_UI_Cross_Design\.ts$|three"
)


def _type_only(names: str | None) -> bool:
    inner = (names or "").strip()
    if not inner.startswith("{"):
        return False
    parts = [p.strip() for p in inner.strip("{} \n").split(",") if p.strip()]
    return bool(parts) and all(p.startswith("type ") for p in parts)


def _resolve(origin: Path, spec: str) -> Path | None:
    for prefix, base in ALIAS.items():
        if spec.startswith(prefix):
            target = base / spec[len(prefix) :]
            break
    else:
        if not spec.startswith("."):
            return None  # node:fs · 라이브러리
        target = origin.parent / spec
    for suffix in (".ts", ""):
        path = Path(str(target) + suffix).resolve()
        if path.is_file():
            return path
    return None


def _reachable() -> set[Path]:
    seen, queue = {ENTRY.resolve()}, [ENTRY.resolve()]
    while queue:
        current = queue.pop()
        if current.suffix != ".ts":
            continue
        for match in _IMPORT.finditer(current.read_text(encoding="utf-8")):
            type_kw, names, spec = match.groups()
            if type_kw or _type_only(names):
                continue
            found = _resolve(current, spec)
            if found and found not in seen:
                seen.add(found)
                queue.append(found)
    return seen


def test_extent_bundle_pulls_no_screen_code():
    reached = _reachable()
    names = {p.relative_to(ROOT).as_posix() for p in reached}
    assert "B07_DesignDetail/B07_DesignDetail_Cross_Overlay.ts" in names  # 걷기가 실제로 돎
    bad = sorted(n for n in names if FORBIDDEN.search(n))
    assert not bad, bad