/**
 * Gold Bar — Codels 3D model library
 * License: CC0-1.0 · Units: meters · Y-up · Front: +Z · Origin: center of the model (it floats — pickups, planets)
 * Triangles: 184 · Size (W × H × D): 0.24 × 0.05 × 0.08 m
 *
 * Usage:
 *   import { createGoldBar } from './gold-bar.js';
 *   
 *   const model = createGoldBar();
 *   model.position.set(0, 0, 0);
 *   scene.add(model);
 */
import * as THREE from 'three';

// Revolve a 2D profile [[radius, y], ...] around the Y axis.
function lathe(points, segments, phiStart = 0, phiLength = Math.PI * 2) {
  return new THREE.LatheGeometry(points.map(([x, y]) => new THREE.Vector2(x, y)), segments, phiStart, phiLength);
}

export function createGoldBar() {
  const root = new THREE.Group();
  root.name = 'GoldBar';

  // Materials
  const goldMat = new THREE.MeshStandardMaterial({ name: 'gold', color: 0xf7c437, roughness: 0.28, metalness: 0.85, flatShading: true });
  const plateMat = new THREE.MeshStandardMaterial({ name: 'plate', color: 0xcba12d, roughness: 0.4, metalness: 0.85, flatShading: true });
  const embossMat = new THREE.MeshStandardMaterial({ name: 'emboss', color: 0xf9d369, roughness: 0.25, metalness: 0.85, flatShading: true });

  // Parts
  const ingot = new THREE.Group();
  ingot.name = 'ingot';
  ingot.position.set(0, -0.0245, 0);
  root.add(ingot);
  const bar = new THREE.Group();
  bar.name = 'bar';
  ingot.add(bar);
  const barBody = new THREE.Mesh(lathe([[0, 0], [0.0545, 0], [0.0589, 0.0032], [0.0446, 0.041], [0.0382, 0.045], [0, 0.045]], 4, Math.PI / 4, Math.PI * 2), goldMat);
  barBody.name = 'barBody';
  barBody.scale.set(2.9412, 1, 1);
  bar.add(barBody);
  const barPlate = new THREE.Mesh(new THREE.BoxGeometry(0.13, 0.002, 0.04), plateMat);
  barPlate.name = 'barPlate';
  barPlate.position.set(0.012, 0.0458, 0);
  bar.add(barPlate);
  const barSeal = new THREE.Mesh(new THREE.CylinderGeometry(0.014, 0.014, 0.003, 12), embossMat);
  barSeal.name = 'barSeal';
  barSeal.position.set(-0.066, 0.0465, 0);
  bar.add(barSeal);
  const barSealCore = new THREE.Mesh(new THREE.CylinderGeometry(0.0085, 0.0085, 0.0036, 12), plateMat);
  barSealCore.name = 'barSealCore';
  barSealCore.position.set(-0.066, 0.0468, 0);
  bar.add(barSealCore);
  const barMark1 = new THREE.Mesh(new THREE.BoxGeometry(0.1, 0.003, 0.005), embossMat);
  barMark1.name = 'barMark1';
  barMark1.position.set(0.024, 0.0475, 0.011);
  bar.add(barMark1);
  const barMark2 = new THREE.Mesh(new THREE.BoxGeometry(0.076, 0.003, 0.005), embossMat);
  barMark2.name = 'barMark2';
  barMark2.position.set(0.012, 0.0475, 0);
  bar.add(barMark2);
  const barMark3 = new THREE.Mesh(new THREE.BoxGeometry(0.052, 0.003, 0.005), embossMat);
  barMark3.name = 'barMark3';
  barMark3.position.set(0.036, 0.0475, -0.011);
  bar.add(barMark3);

  root.traverse((o) => {
    if (o.isMesh) {
      o.castShadow = true;
      o.receiveShadow = true;
    }
  });
  return root;
}

export default createGoldBar;