const assert = require('node:assert/strict');
const fs = require('node:fs');
const os = require('node:os');
const path = require('node:path');
const test = require('node:test');
const vm = require('node:vm');

function harness() {
  const source = fs.readFileSync(path.join(__dirname, '..', 'AnimationDirector.js'), 'utf8').replace(
    '  Plugin.register(PLUGIN_ID, {',
    '  globalThis.uvTest = { normalizeActorUvs, expandProjectUvs, scaleCubeUvs, getActorUvBasis, tryLoadImportedActorTexture, applyActorTexturePreview, importGeometryIntoCurrentProject };\n  Plugin.register(PLUGIN_ID, {'
  );
  class Group {
    static all = [];
    constructor(data) { Object.assign(this, data); }
    init() { Group.all.push(this); return this; }
    addTo(parent) { this.parent = parent; return this; }
  }
  const cubes = [];
  class Cube {
    static all = cubes;
    constructor(name, box = false) {
      Object.assign(this, typeof name === 'object' ? name : { name });
      this.box_uv = box;
      this.faces = { north: { uv: [0, 0, 16, 16] } };
      this.preview_controller = { updateUV(cube) {
        if (!cube.box_uv || !cube.uv_offset || !cube.from || !cube.to) return;
        const sizeX = cube.to[0] - cube.from[0], sizeY = cube.to[1] - cube.from[1];
        const sizeZ = cube.to[2] - cube.from[2];
        const [u, v] = cube.uv_offset;
        cube.faces.north.uv = [u + sizeZ, v + sizeZ, u + sizeZ + sizeX, v + sizeZ + sizeY];
      } };
      cubes.push(this);
    }
    init() { return this; }
    addTo(parent) { this.parent = parent; return this; }
    setUVMode(box) { this.box_uv = box; }
  }
  class Texture {
    static all = [];
    constructor(data) { Object.assign(this, data); this.uuid = data.name; }
    fromDataURL(url) { this.source = url; return this; }
    add() { Texture.all.push(this); return this; }
  }
  const context = { Buffer, requireNativeModule: require, Group, Cube, Texture, console,
    setTimeout(callback) { callback(); },
    Undo: { initEdit() {}, finishEdit() {}, cancelEdit() {} },
    Project: { texture_width: 64, texture_height: 64, box_uv: true },
    Canvas: { updateAllUVs() {} }, Plugin: { register() {} },
    localStorage: { getItem() { return null; } },
  };
  vm.runInNewContext(source, context);
  return { ...context.uvTest, context, Cube, Texture };
}

test('growing the project UV canvas preserves other actors and converts box UVs', () => {
  const h = harness(), actor1 = new h.Cube('actor1_body', false), actor2 = new h.Cube('actor2_body', true);
  h.normalizeActorUvs(1, 64, 64);
  h.normalizeActorUvs(2, 64, 64);
  h.normalizeActorUvs(1, 128, 64);
  assert.equal(h.context.Project.texture_width, 128);
  assert.deepEqual(Array.from(actor1.faces.north.uv), [0, 0, 16, 16]);
  assert.deepEqual(Array.from(actor2.faces.north.uv), [0, 0, 32, 16]);
  assert.equal(actor2.box_uv, false);
  h.normalizeActorUvs(1, 32, 64);
  assert.deepEqual(Array.from(actor1.faces.north.uv), [0, 0, 64, 16]);
  assert.deepEqual(Array.from(actor2.faces.north.uv), [0, 0, 32, 16]);
  h.normalizeActorUvs(1, 32, 64);
  assert.deepEqual(Array.from(actor1.faces.north.uv), [0, 0, 64, 16], 'Repeated refreshes must not rescale UVs');
});

test('assigning a manually imported texture to an actor normalizes only that actor once', () => {
  const h = harness(), selected = new h.Cube('actor1_body'), other = new h.Cube('actor2_body');
  h.normalizeActorUvs(1, 64, 64); h.normalizeActorUvs(2, 64, 64);
  const texture = new h.Texture({ name: 'custom.png' });
  texture.img = { naturalWidth: 32, naturalHeight: 64 };
  texture.add();
  h.applyActorTexturePreview(1, 'custom.png');
  assert.deepEqual(Array.from(selected.faces.north.uv), [0, 0, 32, 16]);
  assert.deepEqual(Array.from(other.faces.north.uv), [0, 0, 16, 16]);
  h.applyActorTexturePreview(1, 'custom.png');
  assert.deepEqual(Array.from(selected.faces.north.uv), [0, 0, 32, 16]);
});

test('importing a larger actor preserves UV mapping of the earlier model', () => {
  const h = harness();
  const geometry = (width) => ({ description: { texture_width: width, texture_height: width }, bones: [{ name: 'body', cubes: [
    { origin: [0, 0, 0], size: [2, 2, 2], uv: { north: { uv: [0, 0], uv_size: [16, 16] } } },
  ] }] });
  h.importGeometryIntoCurrentProject(geometry(64), 1, false, false);
  h.importGeometryIntoCurrentProject(geometry(128), 2, false, false);
  assert.equal(h.context.Project.texture_width, 128);
  assert.deepEqual(Array.from(h.Cube.all[0].faces.north.uv), [0, 0, 32, 32]);
  assert.deepEqual(Array.from(h.Cube.all[1].faces.north.uv), [0, 0, 16, 16]);
  assert.equal(h.getActorUvBasis()['1'].width, 64);
  assert.equal(h.getActorUvBasis()['2'].width, 128);
});

test('box UV import resolves face coordinates before converting to a smaller texture', () => {
  const h = harness();
  h.importGeometryIntoCurrentProject({ description: { texture_width: 32, texture_height: 32 }, bones: [
    { name: 'body', cubes: [{ origin: [0, 0, 0], size: [2, 3, 4], uv: [8, 4] }] },
  ] }, 1, false, false);
  const cube = h.Cube.all[0];
  assert.equal(cube.box_uv, false);
  assert.deepEqual(Array.from(cube.faces.north.uv), [24, 16, 28, 22]);
});

test('box UV import keeps its original coordinates when no scaling is needed', () => {
  const h = harness();
  h.importGeometryIntoCurrentProject({ description: { texture_width: 64, texture_height: 64 }, bones: [
    { name: 'body', cubes: [{ origin: [0, 0, 0], size: [2, 3, 4], uv: [8, 4] }] },
  ] }, 1, false, false);
  const cube = h.Cube.all[0];
  assert.equal(cube.box_uv, true);
  assert.deepEqual(Array.from(cube.faces.north.uv), [12, 8, 14, 11]);
});

test('manual model import can load an explicitly referenced texture from its extracted pack', (t) => {
  const h = harness(), root = fs.mkdtempSync(path.join(os.tmpdir(), 'ad-uv-pack-'));
  t.after(() => fs.rmSync(root, { recursive: true, force: true }));
  const write = (relative, contents) => { const file = path.join(root, relative);
    fs.mkdirSync(path.dirname(file), { recursive: true }); fs.writeFileSync(file, contents); return file; };
  write('pack.mcmeta', '{}');
  const model = write('assets/example/geckolib/models/entity/demo.geo.json', '{}');
  const png = Buffer.alloc(24); Buffer.from('89504e470d0a1a0a', 'hex').copy(png); png.writeUInt32BE(32, 16); png.writeUInt32BE(64, 20);
  write('assets/example/textures/entity/demo.png', png);
  new h.Cube('actor1_body');
  h.normalizeActorUvs(1, 64, 64);
  h.tryLoadImportedActorTexture({ afw_texture: 'example:textures/entity/demo.png' }, {}, model, 1);
  assert.equal(h.Texture.all.length, 1);
  assert.equal(h.Texture.all[0].relative_path, 'assets/example/textures/entity/demo.png');
  assert.equal(JSON.parse(h.context.Project.multiactor_actor_textures)['1'], h.Texture.all[0].name);
  assert.equal(h.getActorUvBasis()['1'].width, 32);
});