import { BoxGeometry, Mesh, MeshBasicMaterial, Raycaster, Vector3 } from "three";
import { describe, expect, it } from "vitest";
import { arenaCameraClearDistance, arenaCameraPose, arenaSpawnYaw, ARENA_CAMERA_DISTANCE } from "./arenaCamera";
import { ARENA_STAGES } from "./arenaStages";

describe("arena player camera", () => {
  it("starts behind each character at the playable floor on all eight maps", () => {
    for (const stage of ARENA_STAGES) {
      for (const team of [0, 1] as const) {
        const foot = stage.teamSpawns[team];
        const { position, target } = arenaCameraPose(foot, arenaSpawnYaw(stage, team));
        expect(target[0]).toBe(foot[0]);
        expect(target[2]).toBe(foot[2]);
        expect(target[1] - foot[1]).toBeCloseTo(1.35);
        expect(new Vector3(...position).distanceTo(new Vector3(...target))).toBeCloseTo(ARENA_CAMERA_DISTANCE);
        expect(position[1] - foot[1]).toBeLessThan(4);
      }
    }
  });

  it("follows player translation and responds to orbit input", () => {
    const first = arenaCameraPose([1, -22, 3], 0);
    const moved = arenaCameraPose([11, -20, 5], 0);
    expect(moved.position.map((value, axis) => value - first.position[axis])).toEqual([10, 2, 2]);
    expect(arenaCameraPose([1, -22, 3], Math.PI / 2).position).not.toEqual(first.position);
    expect(arenaCameraPose([0, 0, 0], NaN, Infinity).position.every(Number.isFinite)).toBe(true);
  });

  it("pulls in before a wall and restores full distance in open space", () => {
    const wall = new Mesh(new BoxGeometry(8, 8, 0.2), new MeshBasicMaterial());
    wall.position.set(0, 1.5, -2);
    wall.updateMatrixWorld(true);
    const target = new Vector3(0, 1.5, 0);
    const ray = new Raycaster();
    expect(arenaCameraClearDistance(target, new Vector3(0, 1.5, -6), wall, ray)).toBeCloseTo(1.7);
    expect(arenaCameraClearDistance(target, new Vector3(6, 1.5, 0), wall, ray)).toBe(6);
    wall.geometry.dispose();
    wall.material.dispose();
  });
});