"""Native datasheet_extract vs inherited extraction — prove before switching pipeline."""

from __future__ import annotations

import ast
from pathlib import Path

from backend.services.datasheet_extract import _coerce_abs_max
from backend.services.extraction import _coerce_abs_max as inherited_coerce


def test_coerce_abs_max_matches_inherited():
    raw = [
        {"parameter": "Vin", "min": 0, "max": 6, "unit": "V", "source_page": 4},
        "not-a-dict",
    ]
    assert _coerce_abs_max(raw) == inherited_coerce(raw)
    assert _coerce_abs_max(None) == inherited_coerce(None)


def test_native_extract_has_no_anthropic_import():
    path = Path(__import__("backend.services.datasheet_extract", fromlist=["x"]).__file__)
    tree = ast.parse(path.read_text())
    imported = []
    for node in ast.walk(tree):
        if isinstance(node, ast.ImportFrom) and node.module:
            imported.append(node.module)
        elif isinstance(node, ast.Import):
            imported.extend(a.name for a in node.names)
    assert not any("anthropic" in (m or "") for m in imported)
    assert "backend.services.llm.factory" in imported