/**
 * 艾动智能 · 36 仓充电柜 参数化 3D 模型（Three.js）
 *
 * 设计约束（AGENTS.md「操作规则」）：
 *   - 明亮 / 浅色基调，⛔ 不做暗色科技风；
 *   - 柜子规格按真实产品：6 列 × 6 行 = 36 个独立仓体，每仓带状态指示灯。
 *
 * 工程约束：
 *   - canvas 透明背景（alpha），柜子"浮"在页面浅色渐变上 ⇒ 不存在图片硬边界；
 *   - 纯参数化建模，不依赖任何外部模型文件（我们没有、也生成不出高精度模型资产）；
 *   - 性能：DPR 上限 2、页面隐藏/滚出视口时暂停渲染；
 *   - 降级：WebGL 不可用或脚本异常 ⇒ 页面回落到静态主视觉图（见 index.html）。
 */

import * as THREE from 'three';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

/* ============================ 规格常量 ============================ */
const COLS = 6;
const ROWS = 6;
const CELL_W = 0.62;          // 单仓横向步进
const CELL_H = 0.72;          // 单仓纵向步进
const DOOR_W = 0.54;
const DOOR_H = 0.64;
const BODY_H = ROWS * CELL_H; // 4.32
const BASE_H = 0.20;
const CAP_H = 0.24;

/* 深度（Z 轴）。
   ⚠️ 原先柜体只有 0.62 深，而宽 3.72 ⇒ 宽:深 ≈ 6:1，薄得像一块板，
   从侧面看尤其难看。真实充电柜深得多，这里加到 1.18 ⇒ 宽:深 ≈ 3.2:1。 */
const BODY_D = 1.18;
const CAP_D = 1.24;           // 顶盖略外挑
const PLINTH_D = 1.22;        // 底座略外挑
const DOOR_Z = BODY_D / 2 + 0.07;   // 仓门铰链平面（柜体前面之外一点）
const CAVITY_D = 0.85;        // 仓内深度

const BRAND = 0x0366e6;       // 取自 logo 的品牌蓝
const LIGHT_CYAN = 0x17e4ff;  // 状态灯

/** 上面 3 排用深色玻璃仓门、下面 3 排用浅色仓门 —— 与主视觉图的层次一致 */
const DARK_ROWS = 3;

/* ============================ 渲染器 ============================ */
const canvas = document.getElementById('cabinet-canvas');
/* 移动端降质：手机 GPU 弱，36 仓 + 阴影 + 环境反射很容易发烫掉帧。
   判据用「窄屏 或 粗指针(触摸) 或 低 DPR」三者之一。 */
const IS_MOBILE = (window.innerWidth <= 860)
  || (window.matchMedia && window.matchMedia('(pointer: coarse)').matches)
  || (window.devicePixelRatio || 1) < 2;

const renderer = new THREE.WebGLRenderer({
  canvas,
  alpha: true,                 // 透明背景，让柜子浮在页面上
  antialias: !IS_MOBILE,        // 移动端关 MSAA，靠 DPR 与后处理兜不住就算了
  powerPreference: 'high-performance',
});
renderer.setClearColor(0x000000, 0);
renderer.setPixelRatio(Math.min(window.devicePixelRatio || 1, IS_MOBILE ? 1.5 : 2));
renderer.shadowMap.enabled = !IS_MOBILE;   // 移动端用假接触阴影（地面那张），不开实时阴影
renderer.shadowMap.type = THREE.PCFSoftShadowMap;
renderer.toneMapping = THREE.ACESFilmicToneMapping;
renderer.toneMappingExposure = 1.05;

const scene = new THREE.Scene();

/* 相机：略低于人眼、微微仰视，产品感更强。
   ⚠️ 距离是算出来的，不是凭感觉：柜体总高约 4.76 单位（底座0.20+主体4.32+顶盖0.24），
   摄像机看向 target(0, 2.36, 0)。38° 垂直视角下
   可见高度 = 2·d·tan19° = 0.689·d。
   - 原 d≈8.4 ⇒ 柜子占 82%，顶天顶地；
   - 现取 CAM_DIST=12.2 ⇒ 实际 d≈11.4 ⇒ 柜子占约 61%，上下各留约 20% 呼吸空间。 */
const CAM_DIST = 13.0;
const camera = new THREE.PerspectiveCamera(38, 1, 0.1, 100);
camera.position.set(
  CAM_DIST * 0.52,   // x
  CAM_DIST * 0.35,   // y
  CAM_DIST * 0.76,   // z
);

/* ============================ 环境反射 ============================ */
/** 程序化生成"影棚渐变"环境贴图 —— 让深色玻璃仓门有细腻反射，无需外部 HDR 文件。 */
function buildEnvironment() {
  const pmrem = new THREE.PMREMGenerator(renderer);
  const envScene = new THREE.Scene();

  // 一个内部着色的渐变球：上白、中浅灰、下稍暗，模拟影棚柔光箱
  const geo = new THREE.SphereGeometry(10, 32, 16);
  const mat = new THREE.ShaderMaterial({
    side: THREE.BackSide,
    uniforms: {
      top: { value: new THREE.Color(0xffffff) },
      mid: { value: new THREE.Color(0xdfe4ec) },
      bot: { value: new THREE.Color(0x9aa3b2) },
    },
    vertexShader: `
      varying float vY;
      void main() {
        vY = normalize(position).y;
        gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
      }`,
    fragmentShader: `
      uniform vec3 top; uniform vec3 mid; uniform vec3 bot;
      varying float vY;
      void main() {
        float t = clamp(vY * 0.5 + 0.5, 0.0, 1.0);
        vec3 c = t < 0.5 ? mix(bot, mid, t * 2.0) : mix(mid, top, (t - 0.5) * 2.0);
        gl_FragColor = vec4(c, 1.0);
      }`,
  });
  envScene.add(new THREE.Mesh(geo, mat));
  const env = pmrem.fromScene(envScene, 0.04).texture;
  pmrem.dispose();
  geo.dispose();
  mat.dispose();
  return env;
}
scene.environment = buildEnvironment();

/* ============================ 灯光 ============================ */
function buildLights() {
  scene.add(new THREE.HemisphereLight(0xffffff, 0xc8d0dc, 0.55));

  // 主光：右上前侧，冷白，投影（移动端为省电只留光照、不投影）
  const key = new THREE.DirectionalLight(0xffffff, 2.1);
  key.position.set(5, 8, 6);
  if (!IS_MOBILE) {
    key.castShadow = true;
    key.shadow.mapSize.set(2048, 2048);
    key.shadow.camera.near = 1;
    key.shadow.camera.far = 30;
    key.shadow.camera.left = -6;
    key.shadow.camera.right = 6;
    key.shadow.camera.top = 8;
    key.shadow.camera.bottom = -2;
    key.shadow.bias = -0.0008;
    key.shadow.normalBias = 0.02;
  }
  scene.add(key);

  // 补光：左侧，柔
  const fill = new THREE.DirectionalLight(0xdfe8ff, 0.7);
  fill.position.set(-6, 4, 4);
  scene.add(fill);

  // 轮廓光：品牌蓝，从左后打，勾出柜体边缘
  const rim = new THREE.DirectionalLight(BRAND, 1.5);
  rim.position.set(-5, 5, -6);
  scene.add(rim);

  // 顶部灯带的自发光点光，让蓝光落在柜顶
  const stripGlow = new THREE.PointLight(BRAND, 6, 6, 2);
  stripGlow.position.set(0, BODY_H + CAP_H + 0.12, 1.2);
  scene.add(stripGlow);
}
buildLights();

/* ============================ 柜体模型 ============================ */
const cabinet = new THREE.Group();
const doors = [];        // { pivot, mesh, row, col, open, target, light }
const doorMaterialCache = new Map();

/** 仓门材质（按行分深浅，缓存复用） */
function doorMaterial(dark) {
  const key = dark ? 'dark' : 'light';
  if (doorMaterialCache.has(key)) return doorMaterialCache.get(key);
  const m = new THREE.MeshStandardMaterial(
    dark
      ? { color: 0x1b2432, roughness: 0.18, metalness: 0.35 }   // 深色玻璃
      : { color: 0xd9dde4, roughness: 0.42, metalness: 0.12 },  // 浅色门板
  );
  doorMaterialCache.set(key, m);
  return m;
}

function buildBody() {
  const w = COLS * CELL_W;
  // 主体
  const body = new THREE.Mesh(
    new THREE.BoxGeometry(w, BODY_H, BODY_D),
    new THREE.MeshStandardMaterial({ color: 0xe9ebef, roughness: 0.55, metalness: 0.08 }),
  );
  body.position.y = BASE_H + BODY_H / 2;
  body.castShadow = true;
  body.receiveShadow = true;
  cabinet.add(body);

  // 顶盖（略宽略深，深色，中间嵌品牌蓝灯带）
  const cap = new THREE.Mesh(
    new THREE.BoxGeometry(w + 0.08, CAP_H, CAP_D),
    new THREE.MeshStandardMaterial({ color: 0x2b3038, roughness: 0.4, metalness: 0.3 }),
  );
  cap.position.y = BASE_H + BODY_H + CAP_H / 2;
  cap.castShadow = true;
  cabinet.add(cap);

  const strip = new THREE.Mesh(
    new THREE.BoxGeometry(w - 0.5, 0.045, 0.05),
    new THREE.MeshStandardMaterial({
      color: 0x0a2a5e, emissive: BRAND, emissiveIntensity: 2.4, roughness: 0.3,
    }),
  );
  strip.position.set(0, BASE_H + BODY_H + CAP_H - 0.07, CAP_D / 2 + 0.012);
  cabinet.add(strip);

  // 底座 + 支脚
  const plinth = new THREE.Mesh(
    new THREE.BoxGeometry(w + 0.04, BASE_H, PLINTH_D),
    new THREE.MeshStandardMaterial({ color: 0x3a4048, roughness: 0.5, metalness: 0.25 }),
  );
  plinth.position.y = BASE_H / 2;
  plinth.castShadow = true;
  plinth.receiveShadow = true;
  cabinet.add(plinth);

  for (const sx of [-1, 1]) {
    for (const sz of [-1, 1]) {
      const foot = new THREE.Mesh(
        new THREE.CylinderGeometry(0.055, 0.05, 0.06, 16),
        new THREE.MeshStandardMaterial({ color: 0x22262c, roughness: 0.6 }),
      );
      foot.position.set(sx * (w / 2 - 0.14), 0.03, sz * (PLINTH_D / 2 - 0.14));
      cabinet.add(foot);
    }
  }
}

/** 单个仓体：门框 + 门 + 把手 + 状态灯；门挂在 pivot 上以便绕铰链开合 */
function buildCompartment(row, col) {
  const dark = row < ROWS / 2;
  const x = (col - (COLS - 1) / 2) * CELL_W;
  const y = BASE_H + (row + 0.5) * CELL_H;

  // 门框（深色，凸出在柜体前面）
  const frame = new THREE.Mesh(
    new THREE.BoxGeometry(CELL_W - 0.02, CELL_H - 0.02, 0.06),
    new THREE.MeshStandardMaterial({ color: 0x353b45, roughness: 0.45, metalness: 0.3 }),
  );
  frame.position.set(x, y, BODY_D / 2 + 0.03);
  cabinet.add(frame);

  // 铰链在左侧：pivot 放在门左缘
  const pivot = new THREE.Group();
  pivot.position.set(x - DOOR_W / 2, y, DOOR_Z);
  cabinet.add(pivot);

  const door = new THREE.Mesh(
    new THREE.BoxGeometry(DOOR_W, DOOR_H, 0.05),
    doorMaterial(dark),
  );
  door.position.set(DOOR_W / 2, 0, 0.025);
  door.castShadow = true;
  pivot.add(door);

  // 把手
  const handle = new THREE.Mesh(
    new THREE.BoxGeometry(0.035, 0.16, 0.035),
    new THREE.MeshStandardMaterial({ color: 0xb9c0cb, roughness: 0.25, metalness: 0.85 }),
  );
  handle.position.set(DOOR_W - 0.07, 0, 0.055);
  pivot.add(handle);

  // 状态灯（门框右上角，自发光）
  const light = new THREE.Mesh(
    new THREE.BoxGeometry(0.1, 0.022, 0.02),
    new THREE.MeshStandardMaterial({
      color: 0x08243f, emissive: LIGHT_CYAN, emissiveIntensity: 2.2, roughness: 0.4,
    }),
  );
  light.position.set(x + CELL_W / 2 - 0.1, y + CELL_H / 2 - 0.07, BODY_D / 2 + 0.065);
  cabinet.add(light);

  // 仓内（开门后可见的暗腔 + 弱光）
  const cavity = new THREE.Mesh(
    new THREE.BoxGeometry(CELL_W - 0.08, CELL_H - 0.08, CAVITY_D),
    new THREE.MeshStandardMaterial({ color: 0x111720, roughness: 0.9 }),
  );
  cavity.position.set(x, y, BODY_D / 2 - CAVITY_D / 2 + 0.02);
  cabinet.add(cavity);

  doors.push({
    pivot, door, light, row, col,
    open: false, target: 0, hover: false,
    baseEmissive: 2.2, phase: (row * COLS + col) * 0.37,
  });
}

function buildCabinet() {
  buildBody();
  for (let r = 0; r < ROWS; r++) {
    for (let c = 0; c < COLS; c++) buildCompartment(r, c);
  }
  cabinet.position.y = 0;
  scene.add(cabinet);
}
buildCabinet();

/* ============================ 地面 + 软阴影 ============================ */
/** 用一张径向渐变贴图做假接触阴影，比实时阴影便宜且边缘更柔。 */
function buildFloor() {
  const size = 256;
  const cv = document.createElement('canvas');
  cv.width = cv.height = size;
  const ctx = cv.getContext('2d');
  const g = ctx.createRadialGradient(size / 2, size / 2, 0, size / 2, size / 2, size / 2);
  g.addColorStop(0, 'rgba(20,30,45,0.34)');
  g.addColorStop(0.55, 'rgba(20,30,45,0.12)');
  g.addColorStop(1, 'rgba(20,30,45,0)');
  ctx.fillStyle = g;
  ctx.fillRect(0, 0, size, size);
  const tex = new THREE.CanvasTexture(cv);

  const shadow = new THREE.Mesh(
    new THREE.PlaneGeometry(7.5, 4.5),
    new THREE.MeshBasicMaterial({ map: tex, transparent: true, depthWrite: false }),
  );
  shadow.rotation.x = -Math.PI / 2;
  shadow.position.y = 0.005;
  shadow.renderOrder = -1;
  scene.add(shadow);
}
buildFloor();

/* ============================ 交互 ============================ */
const controls = new OrbitControls(camera, renderer.domElement);
controls.target.set(0, BASE_H + BODY_H / 2, 0);
controls.enableDamping = true;
controls.dampingFactor = 0.06;
controls.enablePan = false;
// 距离上下限跟着取景走：默认约 12.1，允许 9.5–17
controls.minDistance = 9.5;
controls.maxDistance = 17;
controls.minPolarAngle = 0.35;
controls.maxPolarAngle = Math.PI / 2 - 0.03;   // 不钻到地面以下
controls.autoRotate = true;
controls.autoRotateSpeed = 0.55;
// 用户一交互就停自动旋转，避免"拖着还转"
controls.addEventListener('start', () => { controls.autoRotate = false; });
// 触屏：单指旋转、双指缩放；页面滚动交给舞台外的区域（canvas 已设 touch-action:none）
controls.touches = { ONE: THREE.TOUCH.ROTATE, TWO: THREE.TOUCH.DOLLY_ROTATE };

const raycaster = new THREE.Raycaster();
const pointer = new THREE.Vector2(-10, -10);
let hovered = null;

renderer.domElement.addEventListener('pointermove', (e) => {
  const r = renderer.domElement.getBoundingClientRect();
  pointer.x = ((e.clientX - r.left) / r.width) * 2 - 1;
  pointer.y = -((e.clientY - r.top) / r.height) * 2 + 1;
});
renderer.domElement.addEventListener('pointerleave', () => {
  pointer.set(-10, -10);
});
renderer.domElement.addEventListener('click', () => {
  if (!hovered) return;
  const d = doors.find((x) => x.door === hovered);
  if (!d) return;
  d.open = !d.open;
  d.target = d.open ? -Math.PI * 0.62 : 0;
});

/* ============================ 尺寸自适应 ============================ */
function resize() {
  const stage = renderer.domElement.parentElement;
  const w = Math.max(1, stage.clientWidth);
  const h = Math.max(1, stage.clientHeight);
  renderer.setSize(w, h, false);
  camera.aspect = w / h;
  camera.updateProjectionMatrix();
}
window.addEventListener('resize', resize);
resize();

/* ============================ 主循环 ============================ */
const clock = new THREE.Clock();
let visible = true;

// 页面隐藏 / 舞台滚出视口时暂停，省电省 CPU
document.addEventListener('visibilitychange', () => {
  visible = !document.hidden;
  if (visible) clock.getDelta();
});
if ('IntersectionObserver' in window) {
  new IntersectionObserver((entries) => {
    visible = entries[0].isIntersecting && !document.hidden;
    if (visible) clock.getDelta();
  }, { threshold: 0.01 }).observe(renderer.domElement);
}

function tick() {
  requestAnimationFrame(tick);
  if (!visible) return;
  const dt = Math.min(clock.getDelta(), 0.05);
  const t = clock.elapsedTime;

  // 仓门开合（缓动）
  for (const d of doors) {
    const cur = d.pivot.rotation.y;
    const next = cur + (d.target - cur) * Math.min(1, dt * 7);
    d.pivot.rotation.y = next;
    // 悬停高亮
    const wantEmissive = d.door === hovered ? 0.55 : 0;
    d.light.material.emissiveIntensity +=
      (d.baseEmissive + wantEmissive - d.light.material.emissiveIntensity) * Math.min(1, dt * 8);
    // 状态灯轻微呼吸（有在充的仓才亮；这里取一部分做"使用中"的观感）
    if ((d.row + d.col) % 3 === 0) {
      const pulse = 0.75 + 0.25 * Math.sin(t * 2.2 + d.phase);
      d.light.material.emissiveIntensity *= pulse;
    }
  }

  controls.update();
  renderer.render(scene, camera);
}
tick();

/* ============================ 悬停射线检测 ============================ */
setInterval(() => {
  if (!visible) return;
  raycaster.setFromCamera(pointer, camera);
  const hits = raycaster.intersectObjects(doors.map((d) => d.door), false);
  const first = hits.length ? hits[0].object : null;
  if (first !== hovered) {
    hovered = first;
    renderer.domElement.style.cursor = hovered ? 'pointer' : 'grab';
  }
}, 60);

// 供页面判断 3D 是否就绪（失败则回落静态图）
window.__cabinet3d = { ok: true, doors: doors.length };