"""Tests for the headless raycaster: honest frames from real world state."""

from testbed.room.render import Raycaster
from testbed.room.world import Room


def test_spawn_view_shows_crate_and_occludes_beacon():
    """From spawn the beacon is behind crate_red, so the frame center is the
    crate's color, not a cyan glow."""
    room = Room()
    img, grid = Raycaster().render(room)
    px = img.load()
    r, g, b = px[80, 60]
    assert r > 120 and g < 100 and b < 90  # reddish crate, distance-fogged
    assert len(grid) == 30 and len(grid[0]) == 40
    # The crate is ~5m away: center depth block must be well below 10.
    assert 2.0 < grid[17][20] < 8.0


def test_wall_nearby_is_bright_gray():
    room = Room()
    room.capsule.yaw_deg = 180.0  # face north wall 1.5m away
    px = Raycaster().render(room)[0].load()
    r, g, b = px[80, 60]
    assert abs(r - g) < 8 and r > 80  # gray wall, little fog at 1.5m


def test_beacon_glow_visible_when_facing_it():
    room = Room()
    room.capsule.x, room.capsule.z, room.capsule.yaw_deg = 11.0, 11.0, 45.0
    img, _ = Raycaster().render(room)
    px = img.load()
    r, g, b = px[80, 60]
    assert b > r  # inactive beacon glows cyan
    room.beacon.active = True
    px = Raycaster().render(room)[0].load()
    r, g, b = px[80, 60]
    assert r > b  # active beacon glows warm yellow


def test_beacon_occluded_by_crate():
    room = Room()
    # Beacon behind crate_red from spawn: center pixel must not be cyan.
    px = Raycaster().render(room)[0].load()
    r, g, b = px[80, 60]
    assert b < 90


def test_depth_grid_aligned_and_bounded():
    room = Room()
    _, grid = Raycaster().render(room, max_depth=10.0)
    assert all(0.0 <= v <= 10.0 for row in grid for v in row)
    assert any(v > 0 for row in grid for v in row)