"""Schematic parsers load from src; they do not classify PCB vias as pads."""

from __future__ import annotations

from pathlib import Path

import backend.periscopex.parsers as parsers
import backend.periscopex.parsers_edif as parsers_edif
import backend.periscopex.parsers_kicad_pcb as pcb
from backend.periscopex.parsers import detect_netlist_format, parse_netlist_any


def test_schematic_parsers_are_src():
    for mod, name in ((parsers, "parsers.py"), (parsers_edif, "parsers_edif.py")):
        path = Path(mod.__file__).resolve()
        assert path.name == name
        assert "src" in path.parts
        assert "Native Periscope overlay" not in path.read_text(encoding="utf-8")[:400]


def test_pcb_parser_stays_native_kicad_pcb():
    path = Path(pcb.__file__).resolve()
    assert path.parts[-1] == "parsers_kicad_pcb.py"
    assert "src" in path.parts
    assert "_is_footprint_via" in path.read_text(encoding="utf-8")


def test_detect_format_negative_pcb_is_not_edif_or_kicad_sch():
    # A board file starts with (kicad_pcb …), not schematic markers.
    sample = "(kicad_pcb (version 20240108)\n"
    assert detect_netlist_format(sample) == "pads"  # unknown schematic → PADS sniff default


def test_parse_netlist_any_pads_roundtrip(tmp_path: Path):
    asc = tmp_path / "n.asc"
    asc.write_text(
        "*PADS-PCB*\n*PART*\nR1 0603\nU1 QFP48\n*NET*\n*SIGNAL* GND\nR1.1 U1.8\n*SIGNAL* 3V3\nU1.7\n*END*\n"
    )
    parts, nets, fmt = parse_netlist_any(asc)
    assert fmt == "pads"
    assert parts["R1"] == "0603"
    assert ("R1", "1") in nets["GND"]
    assert "GND" in nets