import RAPIER from "@dimforge/rapier3d-compat";
import { beforeAll, describe, expect, it } from "vitest";
import { DUNGEON_PHYSICAL_COLLISION_GROUPS, DUNGEON_SIGHT_BLOCKER_COLLISION_GROUPS } from "./dungeonLineOfSight";
import { hasDungeonLabelLineOfSight } from "./dungeonLabelVisibility";

beforeAll(async () => { await RAPIER.init(); });

const CAMERA = { x: 0, y: 2, z: 0 };
const LABEL = { x: 4, y: 2, z: 0 };

describe("dungeon label occlusion", () => {
  it("hides labels behind solid dungeon walls using the physical spatial index", () => {
    const world = new RAPIER.World({ x: 0, y: 0, z: 0 });
    try {
      world.createCollider(RAPIER.ColliderDesc.cuboid(0.1, 3, 3)
        .setTranslation(2, 2, 0).setCollisionGroups(DUNGEON_PHYSICAL_COLLISION_GROUPS));
      world.step();
      expect(hasDungeonLabelLineOfSight(RAPIER, world, CAMERA, LABEL)).toBe(false);
      expect(hasDungeonLabelLineOfSight(RAPIER, world, CAMERA, { x: 1, y: 2, z: 0 })).toBe(true);
    } finally { world.free(); }
  });

  it("occludes across floors and ceilings at the exact camera and label heights", () => {
    const world = new RAPIER.World({ x: 0, y: 0, z: 0 });
    try {
      world.createCollider(RAPIER.ColliderDesc.cuboid(5, 0.1, 5)
        .setTranslation(0, 1, 0).setCollisionGroups(DUNGEON_PHYSICAL_COLLISION_GROUPS));
      world.step();
      expect(hasDungeonLabelLineOfSight(RAPIER, world, CAMERA, { x: 0, y: 0, z: 0 })).toBe(false);
      expect(hasDungeonLabelLineOfSight(RAPIER, world, CAMERA, LABEL)).toBe(true);
    } finally { world.free(); }
  });

  it("ignores actors, trigger volumes, and the duplicate combat sight layer", () => {
    const world = new RAPIER.World({ x: 0, y: 0, z: 0 });
    try {
      const actor = world.createRigidBody(RAPIER.RigidBodyDesc.kinematicPositionBased());
      world.createCollider(RAPIER.ColliderDesc.cuboid(0.1, 3, 3).setTranslation(1, 2, 0), actor);
      world.createCollider(RAPIER.ColliderDesc.cuboid(0.1, 3, 3).setTranslation(2, 2, 0)
        .setSensor(true).setCollisionGroups(DUNGEON_PHYSICAL_COLLISION_GROUPS));
      world.createCollider(RAPIER.ColliderDesc.cuboid(0.1, 3, 3).setTranslation(3, 2, 0)
        .setSensor(true).setCollisionGroups(DUNGEON_SIGHT_BLOCKER_COLLISION_GROUPS));
      world.step();
      expect(hasDungeonLabelLineOfSight(RAPIER, world, CAMERA, LABEL)).toBe(true);
    } finally { world.free(); }
  });

  it("does not query past a label or hide one at the camera position", () => {
    const world = new RAPIER.World({ x: 0, y: 0, z: 0 });
    try {
      world.createCollider(RAPIER.ColliderDesc.cuboid(0.1, 3, 3).setTranslation(5, 2, 0));
      world.step();
      expect(hasDungeonLabelLineOfSight(RAPIER, world, CAMERA, LABEL)).toBe(true);
      expect(hasDungeonLabelLineOfSight(RAPIER, world, CAMERA, CAMERA)).toBe(true);
      expect(hasDungeonLabelLineOfSight(RAPIER, world, CAMERA, { x: NaN, y: 2, z: 0 })).toBe(false);
    } finally { world.free(); }
  });
});