/**
 * Spawn Pad — Codels 3D model library
 * License: CC0-1.0 · Units: meters · Y-up · Front: +Z · Origin: center of the base (y = 0)
 * Triangles: 952 · Size (W × H × D): 2.00 × 0.20 × 2.00 m
 *
 * Usage:
 *   import { createSpawnPad } from './spawn-pad.js';
 *   
 *   const model = createSpawnPad();
 *   model.position.set(0, 0, 0);
 *   scene.add(model);
 */
import * as THREE from 'three';

const deg = THREE.MathUtils.degToRad;

// 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);
}

// Extrude a 2D outline along Z (centered). bevel = [thickness, size, segments].
function extrude(outline, depth, holes = [], bevel = null) {
  const shape = new THREE.Shape(outline.map(([x, y]) => new THREE.Vector2(x, y)));
  for (const hole of holes) shape.holes.push(new THREE.Path(hole.map(([x, y]) => new THREE.Vector2(x, y))));
  const options = bevel
    ? { depth, bevelEnabled: true, bevelThickness: bevel[0], bevelSize: bevel[1], bevelSegments: bevel[2] }
    : { depth, bevelEnabled: false };
  return new THREE.ExtrudeGeometry(shape, options).translate(0, 0, -depth / 2);
}

export function createSpawnPad() {
  const root = new THREE.Group();
  root.name = 'SpawnPad';

  // Materials
  const baseMat = new THREE.MeshStandardMaterial({ name: 'base', color: 0x2d3341, roughness: 0.55, metalness: 0.35, flatShading: true });
  const plateMat = new THREE.MeshStandardMaterial({ name: 'plate', color: 0x485267, roughness: 0.5, metalness: 0.3, flatShading: true });
  const glowMat = new THREE.MeshStandardMaterial({ name: 'glow', color: 0x68d6ff, roughness: 0.3, emissive: 0x35c8ff, flatShading: true });
  const dimMat = new THREE.MeshStandardMaterial({ name: 'dim', color: 0x297da2, roughness: 0.4, emissive: 0x35c8ff, emissiveIntensity: 0.3, flatShading: true });

  // Shared geometries
  const boxGeo = new THREE.BoxGeometry(0.16, 0.03, 0.035);
  const extrudeGeo = extrude([[0, -0.07], [0.16, 0.09], [0.16, 0.17], [0, 0.01], [-0.16, 0.17], [-0.16, 0.09]], 0.03);

  // Parts
  const spawnPad = new THREE.Group();
  spawnPad.name = 'spawnPad';
  root.add(spawnPad);
  const base = new THREE.Mesh(lathe([[0, 0], [1, 0], [1, 0.09], [0.93, 0.15], [0, 0.15]], 28), baseMat);
  base.name = 'base';
  spawnPad.add(base);
  const plate = new THREE.Mesh(lathe([[0, 0.14], [0.86, 0.14], [0.86, 0.175], [0, 0.175]], 28), plateMat);
  plate.name = 'plate';
  spawnPad.add(plate);
  const glowRing = new THREE.Mesh(lathe([[0.8, 0.17], [0.8, 0.195], [0.72, 0.195], [0.72, 0.17]], 28), glowMat);
  glowRing.name = 'glowRing';
  spawnPad.add(glowRing);
  const light1 = new THREE.Mesh(boxGeo, dimMat);
  light1.name = 'light1';
  light1.position.set(0.895, 0.155, 0);
  light1.rotation.set(0, deg(-90), 0);
  spawnPad.add(light1);
  const light2 = new THREE.Mesh(boxGeo, dimMat);
  light2.name = 'light2';
  light2.position.set(0.7751, 0.155, -0.4475);
  light2.rotation.set(0, deg(-60), 0);
  spawnPad.add(light2);
  const light3 = new THREE.Mesh(boxGeo, dimMat);
  light3.name = 'light3';
  light3.position.set(0.4475, 0.155, -0.7751);
  light3.rotation.set(0, deg(-30), 0);
  spawnPad.add(light3);
  const light4 = new THREE.Mesh(boxGeo, dimMat);
  light4.name = 'light4';
  light4.position.set(0, 0.155, -0.895);
  spawnPad.add(light4);
  const light5 = new THREE.Mesh(boxGeo, dimMat);
  light5.name = 'light5';
  light5.position.set(-0.4475, 0.155, -0.7751);
  light5.rotation.set(0, deg(30), 0);
  spawnPad.add(light5);
  const light6 = new THREE.Mesh(boxGeo, dimMat);
  light6.name = 'light6';
  light6.position.set(-0.7751, 0.155, -0.4475);
  light6.rotation.set(0, deg(60), 0);
  spawnPad.add(light6);
  const light7 = new THREE.Mesh(boxGeo, dimMat);
  light7.name = 'light7';
  light7.position.set(-0.895, 0.155, 0);
  light7.rotation.set(0, deg(90), 0);
  spawnPad.add(light7);
  const light8 = new THREE.Mesh(boxGeo, dimMat);
  light8.name = 'light8';
  light8.position.set(-0.7751, 0.155, 0.4475);
  light8.rotation.set(0, deg(120), 0);
  spawnPad.add(light8);
  const light9 = new THREE.Mesh(boxGeo, dimMat);
  light9.name = 'light9';
  light9.position.set(-0.4475, 0.155, 0.7751);
  light9.rotation.set(0, deg(150), 0);
  spawnPad.add(light9);
  const light10 = new THREE.Mesh(boxGeo, dimMat);
  light10.name = 'light10';
  light10.position.set(0, 0.155, 0.895);
  light10.rotation.set(0, deg(180), 0);
  spawnPad.add(light10);
  const light11 = new THREE.Mesh(boxGeo, dimMat);
  light11.name = 'light11';
  light11.position.set(0.4475, 0.155, 0.7751);
  light11.rotation.set(0, deg(210), 0);
  spawnPad.add(light11);
  const light12 = new THREE.Mesh(boxGeo, dimMat);
  light12.name = 'light12';
  light12.position.set(0.7751, 0.155, 0.4475);
  light12.rotation.set(0, deg(240), 0);
  spawnPad.add(light12);
  const arrow1 = new THREE.Mesh(extrudeGeo, glowMat);
  arrow1.name = 'arrow1';
  arrow1.position.set(0.3536, 0.175, -0.3536);
  arrow1.rotation.set(deg(-90), 0, deg(-45));
  spawnPad.add(arrow1);
  const arrow2 = new THREE.Mesh(extrudeGeo, glowMat);
  arrow2.name = 'arrow2';
  arrow2.position.set(-0.3536, 0.175, -0.3536);
  arrow2.rotation.set(deg(-90), 0, deg(45));
  spawnPad.add(arrow2);
  const arrow3 = new THREE.Mesh(extrudeGeo, glowMat);
  arrow3.name = 'arrow3';
  arrow3.position.set(-0.3536, 0.175, 0.3536);
  arrow3.rotation.set(deg(-90), 0, deg(135));
  spawnPad.add(arrow3);
  const arrow4 = new THREE.Mesh(extrudeGeo, glowMat);
  arrow4.name = 'arrow4';
  arrow4.position.set(0.3536, 0.175, 0.3536);
  arrow4.rotation.set(deg(-90), 0, deg(225));
  spawnPad.add(arrow4);
  const coreRing = new THREE.Mesh(lathe([[0.2, 0.17], [0.2, 0.19], [0.13, 0.19], [0.13, 0.17]], 28), dimMat);
  coreRing.name = 'coreRing';
  spawnPad.add(coreRing);

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

export default createSpawnPad;