/**
 * Book Stack — Codels 3D model library
 * License: CC0-1.0 · Units: meters · Y-up · Front: +Z · Origin: center of the base (y = 0)
 * Triangles: 528 · Size (W × H × D): 0.34 × 0.21 × 0.31 m
 *
 * Usage:
 *   import { createBookStack } from './book-stack.js';
 *   
 *   const model = createBookStack();
 *   model.position.set(0, 0, 0);
 *   scene.add(model);
 */
import * as THREE from 'three';

const deg = THREE.MathUtils.degToRad;

export function createBookStack() {
  const root = new THREE.Group();
  root.name = 'BookStack';

  // Materials
  const pagesMat = new THREE.MeshStandardMaterial({ name: 'pages', color: 0xe4d6b4, roughness: 0.9, flatShading: true });
  const inkMat = new THREE.MeshStandardMaterial({ name: 'ink', color: 0x6a5e50, roughness: 0.9, flatShading: true });
  const goldMat = new THREE.MeshStandardMaterial({ name: 'gold', color: 0xc9a24a, roughness: 0.35, metalness: 0.65, flatShading: true });
  const c0Mat = new THREE.MeshStandardMaterial({ name: 'c0', color: 0x7d2f2a, roughness: 0.7, flatShading: true });
  const c1Mat = new THREE.MeshStandardMaterial({ name: 'c1', color: 0x2f4f70, roughness: 0.7, flatShading: true });
  const c2Mat = new THREE.MeshStandardMaterial({ name: 'c2', color: 0x3f5f3a, roughness: 0.7, flatShading: true });
  const c3Mat = new THREE.MeshStandardMaterial({ name: 'c3', color: 0x6e4a2a, roughness: 0.7, flatShading: true });
  const c4Mat = new THREE.MeshStandardMaterial({ name: 'c4', color: 0x4b3b60, roughness: 0.7, flatShading: true });
  const c5Mat = new THREE.MeshStandardMaterial({ name: 'c5', color: 0x2d5f5c, roughness: 0.7, flatShading: true });
  const ribbonMat = new THREE.MeshStandardMaterial({ name: 'ribbon', color: 0xb3262e, roughness: 0.8, flatShading: true });

  // Shared geometries
  const boxGeo = new THREE.BoxGeometry(0.2071, 0.004, 0.2951);
  const boxGeo2 = new THREE.BoxGeometry(0.006, 0.044, 0.008);
  const boxGeo3 = new THREE.BoxGeometry(0.2126, 0.004, 0.2934);
  const boxGeo4 = new THREE.BoxGeometry(0.1575, 0.004, 0.2138);
  const boxGeo5 = new THREE.BoxGeometry(0.006, 0.0398, 0.008);
  const boxGeo6 = new THREE.BoxGeometry(0.1939, 0.004, 0.2763);
  const boxGeo7 = new THREE.BoxGeometry(0.006, 0.0377, 0.008);
  const boxGeo8 = new THREE.BoxGeometry(0.1568, 0.004, 0.2228);
  const boxGeo9 = new THREE.BoxGeometry(0.142, 0.012, 0.2);
  const boxGeo10 = new THREE.BoxGeometry(0.0605, 0.0015, 0.005);

  // Parts
  const book1 = new THREE.Group();
  book1.name = 'book1';
  book1.position.set(-0.0096, 0, 0.0097);
  book1.rotation.set(0, deg(178.2016), 0);
  root.add(book1);
  const backCover = new THREE.Mesh(boxGeo, c3Mat);
  backCover.name = 'backCover';
  backCover.position.set(0, 0.002, 0);
  book1.add(backCover);
  const frontCover = new THREE.Mesh(boxGeo, c3Mat);
  frontCover.name = 'frontCover';
  frontCover.position.set(0, 0.041, 0);
  book1.add(frontCover);
  const spine = new THREE.Mesh(new THREE.BoxGeometry(0.2071, 0.043, 0.006), c3Mat);
  spine.name = 'spine';
  spine.position.set(0, 0.0215, 0.1446);
  book1.add(spine);
  const pages = new THREE.Mesh(new THREE.BoxGeometry(0.1971, 0.036, 0.2861), pagesMat);
  pages.name = 'pages';
  pages.position.set(0, 0.0215, -0.0015);
  book1.add(pages);
  const spineBand = new THREE.Mesh(boxGeo2, goldMat);
  spineBand.name = 'spineBand';
  spineBand.position.set(-0.0663, 0.0215, 0.1446);
  book1.add(spineBand);
  const spineBand2 = new THREE.Mesh(boxGeo2, goldMat);
  spineBand2.name = 'spineBand';
  spineBand2.position.set(0.0663, 0.0215, 0.1446);
  book1.add(spineBand2);
  const book2 = new THREE.Group();
  book2.name = 'book2';
  book2.position.set(-0.0081, 0.043, -0.0015);
  book2.rotation.set(0, deg(179.2157), 0);
  root.add(book2);
  const backCover2 = new THREE.Mesh(boxGeo3, c0Mat);
  backCover2.name = 'backCover';
  backCover2.position.set(0, 0.002, 0);
  book2.add(backCover2);
  const frontCover2 = new THREE.Mesh(boxGeo3, c0Mat);
  frontCover2.name = 'frontCover';
  frontCover2.position.set(0, 0.027, 0);
  book2.add(frontCover2);
  const spine2 = new THREE.Mesh(new THREE.BoxGeometry(0.2126, 0.029, 0.006), c0Mat);
  spine2.name = 'spine';
  spine2.position.set(0, 0.0145, 0.1437);
  book2.add(spine2);
  const pages2 = new THREE.Mesh(new THREE.BoxGeometry(0.2026, 0.022, 0.2844), pagesMat);
  pages2.name = 'pages';
  pages2.position.set(0, 0.0145, -0.0015);
  book2.add(pages2);
  const book3 = new THREE.Group();
  book3.name = 'book3';
  book3.position.set(0.0111, 0.072, 0.0079);
  book3.rotation.set(0, deg(-3.4747), 0);
  root.add(book3);
  const backCover3 = new THREE.Mesh(boxGeo4, c2Mat);
  backCover3.name = 'backCover';
  backCover3.position.set(0, 0.002, 0);
  book3.add(backCover3);
  const frontCover3 = new THREE.Mesh(boxGeo4, c2Mat);
  frontCover3.name = 'frontCover';
  frontCover3.position.set(0, 0.0368, 0);
  book3.add(frontCover3);
  const spine3 = new THREE.Mesh(new THREE.BoxGeometry(0.1575, 0.0388, 0.006), c2Mat);
  spine3.name = 'spine';
  spine3.position.set(0, 0.0194, 0.1039);
  book3.add(spine3);
  const pages3 = new THREE.Mesh(new THREE.BoxGeometry(0.1475, 0.0318, 0.2048), pagesMat);
  pages3.name = 'pages';
  pages3.position.set(0, 0.0194, -0.0015);
  book3.add(pages3);
  const spineBand3 = new THREE.Mesh(boxGeo5, goldMat);
  spineBand3.name = 'spineBand';
  spineBand3.position.set(-0.0504, 0.0194, 0.1039);
  book3.add(spineBand3);
  const spineBand4 = new THREE.Mesh(boxGeo5, goldMat);
  spineBand4.name = 'spineBand';
  spineBand4.position.set(0.0504, 0.0194, 0.1039);
  book3.add(spineBand4);
  const book4 = new THREE.Group();
  book4.name = 'book4';
  book4.position.set(0.0096, 0.1108, -0.0026);
  book4.rotation.set(0, deg(0.1058), 0);
  root.add(book4);
  const backCover4 = new THREE.Mesh(boxGeo6, c1Mat);
  backCover4.name = 'backCover';
  backCover4.position.set(0, 0.002, 0);
  book4.add(backCover4);
  const frontCover4 = new THREE.Mesh(boxGeo6, c1Mat);
  frontCover4.name = 'frontCover';
  frontCover4.position.set(0, 0.0347, 0);
  book4.add(frontCover4);
  const spine4 = new THREE.Mesh(new THREE.BoxGeometry(0.1939, 0.0367, 0.006), c1Mat);
  spine4.name = 'spine';
  spine4.position.set(0, 0.0184, 0.1351);
  book4.add(spine4);
  const pages4 = new THREE.Mesh(new THREE.BoxGeometry(0.1839, 0.0297, 0.2673), pagesMat);
  pages4.name = 'pages';
  pages4.position.set(0, 0.0184, -0.0015);
  book4.add(pages4);
  const spineBand5 = new THREE.Mesh(boxGeo7, goldMat);
  spineBand5.name = 'spineBand';
  spineBand5.position.set(-0.062, 0.0183, 0.1351);
  book4.add(spineBand5);
  const spineBand6 = new THREE.Mesh(boxGeo7, goldMat);
  spineBand6.name = 'spineBand';
  spineBand6.position.set(0.062, 0.0183, 0.1351);
  book4.add(spineBand6);
  const book5 = new THREE.Group();
  book5.name = 'book5';
  book5.position.set(-0.011, 0.1475, -0.0089);
  book5.rotation.set(0, deg(-10.7754), 0);
  root.add(book5);
  const backCover5 = new THREE.Mesh(boxGeo8, c4Mat);
  backCover5.name = 'backCover';
  backCover5.position.set(0, 0.002, 0);
  book5.add(backCover5);
  const frontCover5 = new THREE.Mesh(boxGeo8, c4Mat);
  frontCover5.name = 'frontCover';
  frontCover5.position.set(0, 0.0351, 0);
  book5.add(frontCover5);
  const spine5 = new THREE.Mesh(new THREE.BoxGeometry(0.1568, 0.0371, 0.006), c4Mat);
  spine5.name = 'spine';
  spine5.position.set(0, 0.0186, 0.1084);
  book5.add(spine5);
  const pages5 = new THREE.Mesh(new THREE.BoxGeometry(0.1468, 0.0301, 0.2138), pagesMat);
  pages5.name = 'pages';
  pages5.position.set(0, 0.0186, -0.0015);
  book5.add(pages5);
  const openBook = new THREE.Group();
  openBook.name = 'openBook';
  openBook.position.set(0.0056, 0.1847, 0.0048);
  openBook.rotation.set(0, deg(8.7674), 0);
  root.add(openBook);
  const openCover = new THREE.Mesh(new THREE.BoxGeometry(0.312, 0.004, 0.21), c5Mat);
  openCover.name = 'openCover';
  openCover.position.set(0, 0.002, 0);
  openBook.add(openCover);
  const openSpine = new THREE.Mesh(new THREE.BoxGeometry(0.016, 0.006, 0.21), c5Mat);
  openSpine.name = 'openSpine';
  openSpine.position.set(0, 0.0014, 0);
  openBook.add(openSpine);
  const pagesRight = new THREE.Group();
  pagesRight.name = 'pagesRight';
  pagesRight.position.set(0.077, 0.0095, 0);
  pagesRight.rotation.set(0, 0, deg(5));
  openBook.add(pagesRight);
  const pageBlock = new THREE.Mesh(boxGeo9, pagesMat);
  pageBlock.name = 'pageBlock';
  pageBlock.position.set(0, 0.006, 0);
  pagesRight.add(pageBlock);
  const textLine = new THREE.Mesh(new THREE.BoxGeometry(0.1032, 0.0015, 0.005), inkMat);
  textLine.name = 'textLine';
  textLine.position.set(-0.0034, 0.0128, -0.07);
  pagesRight.add(textLine);
  const textLine2 = new THREE.Mesh(new THREE.BoxGeometry(0.105, 0.0015, 0.005), inkMat);
  textLine2.name = 'textLine';
  textLine2.position.set(-0.0025, 0.0128, -0.044);
  pagesRight.add(textLine2);
  const textLine3 = new THREE.Mesh(new THREE.BoxGeometry(0.0928, 0.0015, 0.005), inkMat);
  textLine3.name = 'textLine';
  textLine3.position.set(-0.0086, 0.0128, -0.018);
  pagesRight.add(textLine3);
  const textLine4 = new THREE.Mesh(new THREE.BoxGeometry(0.1017, 0.0015, 0.005), inkMat);
  textLine4.name = 'textLine';
  textLine4.position.set(-0.0041, 0.0128, 0.008);
  pagesRight.add(textLine4);
  const textLine5 = new THREE.Mesh(new THREE.BoxGeometry(0.0899, 0.0015, 0.005), inkMat);
  textLine5.name = 'textLine';
  textLine5.position.set(-0.0101, 0.0128, 0.034);
  pagesRight.add(textLine5);
  const textLine6 = new THREE.Mesh(boxGeo10, inkMat);
  textLine6.name = 'textLine';
  textLine6.position.set(-0.0247, 0.0128, 0.06);
  pagesRight.add(textLine6);
  const pagesLeft = new THREE.Group();
  pagesLeft.name = 'pagesLeft';
  pagesLeft.position.set(-0.077, 0.0095, 0);
  pagesLeft.rotation.set(0, 0, deg(-5));
  openBook.add(pagesLeft);
  const pageBlock2 = new THREE.Mesh(boxGeo9, pagesMat);
  pageBlock2.name = 'pageBlock';
  pageBlock2.position.set(0, 0.006, 0);
  pagesLeft.add(pageBlock2);
  const textLine7 = new THREE.Mesh(new THREE.BoxGeometry(0.101, 0.0015, 0.005), inkMat);
  textLine7.name = 'textLine';
  textLine7.position.set(-0.0045, 0.0128, -0.07);
  pagesLeft.add(textLine7);
  const textLine8 = new THREE.Mesh(new THREE.BoxGeometry(0.1038, 0.0015, 0.005), inkMat);
  textLine8.name = 'textLine';
  textLine8.position.set(-0.0031, 0.0128, -0.044);
  pagesLeft.add(textLine8);
  const textLine9 = new THREE.Mesh(new THREE.BoxGeometry(0.0981, 0.0015, 0.005), inkMat);
  textLine9.name = 'textLine';
  textLine9.position.set(-0.006, 0.0128, -0.018);
  pagesLeft.add(textLine9);
  const textLine10 = new THREE.Mesh(new THREE.BoxGeometry(0.1079, 0.0015, 0.005), inkMat);
  textLine10.name = 'textLine';
  textLine10.position.set(-0.001, 0.0128, 0.008);
  pagesLeft.add(textLine10);
  const textLine11 = new THREE.Mesh(new THREE.BoxGeometry(0.093, 0.0015, 0.005), inkMat);
  textLine11.name = 'textLine';
  textLine11.position.set(-0.0085, 0.0128, 0.034);
  pagesLeft.add(textLine11);
  const textLine12 = new THREE.Mesh(boxGeo10, inkMat);
  textLine12.name = 'textLine';
  textLine12.position.set(-0.0247, 0.0128, 0.06);
  pagesLeft.add(textLine12);
  const ribbon = new THREE.Mesh(new THREE.BoxGeometry(0.008, 0.0015, 0.126), ribbonMat);
  ribbon.name = 'ribbon';
  ribbon.position.set(0.012, 0.017, 0.0462);
  ribbon.rotation.set(0, deg(8), 0);
  openBook.add(ribbon);
  const ribbonTail = new THREE.Mesh(new THREE.BoxGeometry(0.008, 0.03, 0.0015), ribbonMat);
  ribbonTail.name = 'ribbonTail';
  ribbonTail.position.set(0.032, 0.004, 0.111);
  ribbonTail.rotation.set(0, deg(8), 0);
  openBook.add(ribbonTail);

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

export default createBookStack;