"""Periscope models load from src; layout primitives stay disjoint."""

from __future__ import annotations

from pathlib import Path

import backend.periscopex.models as models
from backend.periscopex.models import (
    LayoutPad,
    LayoutSegment,
    LayoutVia,
    LayoutZone,
)


def test_models_module_is_src():
    path = Path(models.__file__).resolve()
    assert path.parts[-5:] == ("periscope", "src", "backend", "periscopex", "models.py")
    text = path.read_text(encoding="utf-8")
    assert "Native Periscope overlay" not in text
    assert "pad (component pin land)" in text


def test_pad_via_track_zone_are_distinct_types():
    pad = LayoutPad(number="1", x=0.0, y=0.0, net="GND")
    via = LayoutVia(x=0.0, y=0.0, net="GND", drill=0.3)
    track = LayoutSegment(start=(0.0, 0.0), end=(1.0, 0.0), net="GND")
    zone = LayoutZone(net="GND", layer="F.Cu")
    kinds = {type(pad), type(via), type(track), type(zone)}
    assert len(kinds) == 4
    assert not hasattr(via, "number")
    assert hasattr(pad, "number")
    assert not hasattr(track, "drill")
    assert not hasattr(zone, "drill")
    assert pad.model_dump() != via.model_dump()


def test_via_is_not_a_pad_even_on_same_net_and_xy():
    """Negative: same net and coordinates do not make a via a pad."""
    pad = LayoutPad(number="2", x=1.0, y=2.0, net="3V3")
    via = LayoutVia(x=1.0, y=2.0, net="3V3", drill=0.2)
    assert type(via) is not type(pad)
    assert "number" not in type(via).model_fields
    assert "number" in type(pad).model_fields