import { BufferGeometry, Float32BufferAttribute } from "three";
import { describe, expect, it } from "vitest";
import type { DungeonTraversalRamp } from "./dungeonTypes";
import { bridgeDungeonStairNavigation, smoothDungeonStairGeometry } from "./dungeonTraversalRamps";

const RAMP: DungeonTraversalRamp = {
  id: "stairs",
  start: [0, 0, 0],
  end: [0, 2, 6],
  width: 4,
  navigationBridge: {
    linkId: "stair-seam",
    startPortal: [[-1, 0.5, 2], [1, 0.5, 2]],
    endPortal: [[-1, 1, 3], [1, 1, 3]],
  },
};

describe("reviewed dungeon stair proxies", () => {
  it("smooths tread and riser vertices but preserves upper walls, ceilings and geometry outside the flight", () => {
    const geometry = new BufferGeometry();
    geometry.setAttribute("position", new Float32BufferAttribute([
      0, 0.5, 2,
      0, 1, 2,
      0, 3, 2,
      0, 5, 2,
      3, 0.5, 2,
      0, 0.5, -1,
    ], 3));
    smoothDungeonStairGeometry(geometry, [RAMP]);
    const position = geometry.getAttribute("position");
    expect(position.getY(0)).toBeCloseTo(2 / 3);
    expect(position.getY(1)).toBeCloseTo(2 / 3);
    expect([2, 3, 4, 5].map((vertex) => position.getY(vertex))).toEqual([3, 5, 0.5, 0.5]);
    geometry.dispose();
  });

  it("bridges exactly the existing reviewed portal vertices and rejects stale asset coordinates", () => {
    const geometry = new BufferGeometry();
    geometry.setAttribute("position", new Float32BufferAttribute([
      ...RAMP.navigationBridge!.startPortal.flat(),
      ...RAMP.navigationBridge!.endPortal.flat(),
    ], 3));
    geometry.setIndex([]);
    smoothDungeonStairGeometry(geometry, [RAMP], 0.05);
    bridgeDungeonStairNavigation(geometry, [RAMP], 0.05);
    expect(Array.from(geometry.index!.array)).toEqual([0, 1, 3, 0, 3, 2]);
    geometry.getAttribute("position").setX(0, -1.1);
    expect(() => bridgeDungeonStairNavigation(geometry, [RAMP], 0.05))
      .toThrow("reviewed navigation portal no longer matches the source GLB");
    geometry.dispose();
  });
});