from __future__ import annotations

import pathlib

import pytest
from PIL import Image

from planemapper.models import Aircraft
from planemapper.renderer.projection import MapBounds
from planemapper.renderer.renderer import Renderer

FIXTURE_DIR = pathlib.Path(__file__).parent / "fixtures"


@pytest.fixture
def white_base_map() -> Image.Image:
    return Image.new("RGB", (800, 480), color=(255, 255, 255))


@pytest.fixture
def bounds() -> MapBounds:
    return MapBounds(home_lat=53.0, home_lon=-6.0, radius_nm=100.0)


@pytest.fixture
def renderer(
    white_base_map: Image.Image, bounds: MapBounds, monkeypatch: pytest.MonkeyPatch
) -> Renderer:
    monkeypatch.setattr(
        "planemapper.renderer.airspace.AIRSPACE_PATH",
        FIXTURE_DIR / "airspace_sample.geojson",
    )
    return Renderer(white_base_map, bounds)


def _aircraft(icao: str = "ABC123", **kwargs) -> Aircraft:
    defaults = {"lat": 53.1, "lon": -6.1}
    defaults.update(kwargs)
    return Aircraft(icao=icao, **defaults)


def test_render_returns_800x480(renderer: Renderer) -> None:
    result = renderer.render([])
    assert isinstance(result, Image.Image)
    assert result.size == (800, 480)


def test_trail_accumulated_across_renders(renderer: Renderer) -> None:
    ac = _aircraft(icao="ABC123")
    renderer.render([ac])
    renderer.render([ac])
    assert "ABC123" in renderer._trails
    assert len(renderer._trails["ABC123"]) == 2


def test_absent_aircraft_trail_retained(renderer: Renderer) -> None:
    ac = _aircraft(icao="ABC123")
    renderer.render([ac])
    renderer.render([])  # aircraft absent
    assert "ABC123" in renderer._trails
    assert len(renderer._trails["ABC123"]) == 1