import * as THREE from 'three'; //导入整个 three.js核心库
import {OrbitControls} from 'three/examples/jsm/controls/OrbitControls'; //导入控制器模块，轨道控制器
import {CSS3DRenderer, CSS3DSprite} from 'three/examples/jsm/renderers/CSS3DRenderer.js';
import {GLTFLoader} from 'three/examples/jsm/loaders/GLTFLoader.js'
// 用于模型边缘高亮
import {EffectComposer} from "three/examples/jsm/postprocessing/EffectComposer.js";
import {RenderPass} from "three/examples/jsm/postprocessing/RenderPass.js";
import {OutlinePass} from "three/examples/jsm/postprocessing/OutlinePass.js";
import {UnrealBloomPass} from "three/examples/jsm/postprocessing/UnrealBloomPass.js";
import * as TWEEN from '@tweenjs/tween.js';
import {getBottomMaterial} from './material.js';
import GltfModelManager from "@/views/largeScreen/three/GltfModelManager";

// 定义一个 class类
class renderModel {
  constructor(selector) {
    this.container = document.querySelector(selector);
    // 相机
    this.camera;
    // 场景
    this.scene;
    //渲染器
    this.renderer;
    // 控制器
    this.controls;
    // 3d文字渲染器
    this.css3DRenderer = null;
    // 3d文字控制器
    this.css3dControls = null;
    // 模型
    this.model;
    // 环境光
    this.ambientLight;
    //模型平面
    this.planeGeometry;

    this.outlineObjs = [];
    this.sharedComposer = null;
    this.sharedOutlinePass = null;
    this.sharedBloomPass = null;
    this.isComposerInitialized = false;
    this.raycaster = new THREE.Raycaster();
    this.mouse = new THREE.Vector2();
  }

  // 初始化共享后处理系统
  initSharedPostProcessing() {
    if (this.isComposerInitialized) return;

    // 创建共享的EffectComposer
    this.sharedComposer = new EffectComposer(this.renderer);
    this.sharedComposer.renderTarget1.texture.outputColorSpace = THREE.sRGBEncoding;
    this.sharedComposer.renderTarget2.texture.outputColorSpace = THREE.sRGBEncoding;
    this.sharedComposer.renderTarget1.texture.encoding = THREE.sRGBEncoding;
    this.sharedComposer.renderTarget2.texture.encoding = THREE.sRGBEncoding;

    // 添加基础渲染通道
    const renderPass = new RenderPass(this.scene, this.camera);
    this.sharedComposer.addPass(renderPass);

    // 创建共享的OutlinePass
    this.sharedOutlinePass = new OutlinePass(
      new THREE.Vector2(window.innerWidth, window.innerHeight),
      this.scene,
      this.camera
    );
    // 设置轮廓效果参数
    this.sharedOutlinePass.edgeStrength = 5.0; // 边框的亮度
    this.sharedOutlinePass.edgeGlow = 0.3; // 光晕[0,1]
    this.sharedOutlinePass.edgeThickness = 1.0; // 边框宽度
    // this.sharedOutlinePass.pulsePeriod = 3; // 呼吸闪烁的速度
    // this.sharedOutlinePass.visibleEdgeColor.set(0x00ff00); // 呼吸显示的颜色
    // this.sharedOutlinePass.hiddenEdgeColor.set(0x000000); // 呼吸消失的颜色
    // this.sharedOutlinePass.clear = true;
    this.sharedComposer.addPass(this.sharedOutlinePass);

    // 创建共享的UnrealBloomPass
    this.sharedBloomPass = new UnrealBloomPass();
    this.sharedBloomPass.strength = 0.1;
    this.sharedBloomPass.radius = 0;
    this.sharedBloomPass.threshold = 1;
    this.sharedComposer.addPass(this.sharedBloomPass);

    this.isComposerInitialized = true;

    // 监听窗口大小变化，更新后处理分辨率
    window.addEventListener('resize', () => {
      if (this.sharedOutlinePass) {
        this.sharedOutlinePass.resolution.set(window.innerWidth, window.innerHeight);
      }
    });
  }

  // 优化后的模型高亮方法
  outlineObj(selectedObjects) {
    // 初始化共享后处理系统
    this.initSharedPostProcessing();

    // 更新选中对象
    if (this.sharedOutlinePass) {
      this.sharedOutlinePass.selectedObjects = selectedObjects;

      // 如果之前有高亮对象，先清除
      if (this.outlineObjs.length > 0) {
        this.outlineObjs = [];
      }

      // 添加当前共享的composer到数组
      this.outlineObjs.push(this.sharedComposer);
    }
  }

  // 清理高亮效果
  clearHighlight() {
    if (this.sharedOutlinePass) {
      this.sharedOutlinePass.selectedObjects = [];
      this.outlineObjs = [];
    }
  }

  // 初始化加载模型方法
  init() {
    //初始化场景
    this.initScene();
    //初始化相机
    this.initCamera();
    //初始化渲染器
    this.initRender();
    // 创建灯光
    this.createLight();
    //初始化控制器，控制摄像头,控制器一定要在渲染器后
    this.initControls();
    this.setFBXModel();
    //监听场景大小改变，跳转渲染尺寸
    window.addEventListener('resize', this.onWindowResizes.bind(this));
    //场景渲染
    this.sceneAnimation();
    // 添加鼠标点击事件
    window.addEventListener('click', this.onMouseClick.bind(this));
  }

  initGltfModel() {
    //初始化场景
    this.initScene();
    //初始化相机
    this.initCamera();
    //初始化渲染器
    this.initRender();
    // 创建灯光
    this.createLight();
    //初始化控制器，控制摄像头,控制器一定要在渲染器后
    this.initControls();
    this.setGlbModel();
    //监听场景大小改变，跳转渲染尺寸
    window.addEventListener('resize', this.onWindowResizes.bind(this));
    //场景渲染
    this.sceneAnimation();
    // 添加鼠标点击事件
    window.addEventListener('click', this.onMouseClick.bind(this));
  }

  onMouseClick(event) {
    // 计算鼠标在标准化设备坐标中的位置 (-1 to +1)
    this.mouse.x = (event.clientX / window.innerWidth) * 2 - 1;
    this.mouse.y = -(event.clientY / window.innerHeight) * 2 + 1;

    // 更新射线
    this.raycaster.setFromCamera(this.mouse, this.camera);

    // 计算射线与场景中物体的交点
    const intersects = this.raycaster.intersectObjects(this.scene.children, true);

    if (intersects.length > 0) {
      const point = intersects[0].point;
      const object = intersects[0].object;
      console.log(`Clicked on object: ${object.name} at (${point.x}, ${point.y}, ${point.z})`);

      // 示例：点击时高亮对象
      // this.outlineObj([object]);
    }
  }

  //创建场景
  initScene() {
    this.scene = new THREE.Scene();
    this.scene.background = new THREE.Color(0x000000);
    //底部平面
    const geometry = new THREE.PlaneGeometry(1, 1);
    // 创建材质，可以设置贴图
    const material = getBottomMaterial(
      '#ffffff', // 设置模型的颜色
      require('@/assets/images/models/bg.png'),
      1,
      5
    );
    // 创建平面网格
    const plane = new THREE.Mesh(geometry, material);
    plane.scale.set(1000, 1000, 1000);
    plane.position.y = 0;
    const plane2 = plane.clone();
    plane2.material = getBottomMaterial(
      '#000000', // 设置模型的颜色
      require('@/assets/images/models/bg.png'),
      2,
      5
    );
    this.scene.add(plane2);
    this.scene.add(plane);
  }

  // 创建相机
  initCamera() {
    const {clientHeight, clientWidth} = this.container;
    this.camera = new THREE.PerspectiveCamera(18, clientWidth / clientHeight, 0.1, 10000);
  }

  // 创建渲染器
  initRender() {
    this.renderer = new THREE.WebGLRenderer({
      logarithmicDepthBuffer: true,
      antialias: true, // true/false表示是否开启反锯齿
      alpha: true, // true/false 表示是否可以设置背景色透明
      precision: 'mediump', // highp/mediump/lowp 表示着色精度选择
      premultipliedAlpha: true // true/false 表示是否可以设置像素深度（用来度量图像的分辨率）
      // preserveDrawingBuffer: false, // true/false 表示是否保存绘图缓冲
      // physicallyCorrectLights: true, // true/false 表示是否开启物理光照
    });
    //设置屏幕像素比
    this.renderer.setPixelRatio(window.devicePixelRatio);
    //渲染的尺寸大小
    const {clientHeight, clientWidth} = this.container;
    this.renderer.setSize(clientWidth, clientHeight);
    this.container.appendChild(this.renderer.domElement);

    // 创建一个CSS3渲染器CSS3DRenderer
    this.css3DRenderer = new CSS3DRenderer();
    this.css3DRenderer.setSize(clientWidth, clientHeight);
    // HTML标签<div id="tag"></div>外面父元素叠加到canvas画布上且重合
    this.css3DRenderer.domElement.style.position = 'absolute';
    this.css3DRenderer.domElement.style.top = '0px';
    this.css3DRenderer.domElement.style.zIndex = '9999';
    //设置.pointerEvents=none，解决HTML元素标签对threejs canvas画布鼠标事件的遮挡
    this.css3DRenderer.domElement.style.pointerEvents = 'none';
    this.css3DRenderer.domElement.style.className = 'css3DRenderer';
    this.container.appendChild(this.css3DRenderer.domElement);
  }

  // 创建光源
  createLight() {
    this.scene.add(new THREE.AmbientLight(0xffffff, 10));
  }

  initControls() {
    this.controls = new OrbitControls(this.camera, this.renderer.domElement);
    // this.controls.enableDamping = true;
    // this.controls.screenSpacePanning = false;
    // this.controls.maxPolarAngle = Math.PI / 1.1;
    // this.controls.minPolarAngle = Math.PI / 2;
    // this.controls.minAzimuthAngle = 0;
    // this.controls.maxAzimuthAngle = 0;
    // this.controls.maxDistance = 2000;
    //标签控制器
    this.css3dControls = new OrbitControls(this.camera, this.css3DRenderer.domElement);
    this.css3dControls.enablePan = false;
    this.css3dControls.enableDamping = true;
    this.controls.mouseButtons = {
      LEFT: THREE.MOUSE.PAN,
      MIDDLE: THREE.MOUSE.DOLLY,
      RIGHT: THREE.MOUSE.ROTATE
    };
  }

  animate() {
    this.renderer.render(this.scene, this.camera);
    this.renderer.autoClear = true;
    this.controls.update();
    this.css3DRenderer.render(this.scene, this.camera);
    TWEEN.update();

    // 使用共享的composer进行后处理渲染
    // if (this.isComposerInitialized && this.sharedComposer) {
    //   this.sharedComposer.render();
    // }
  }

  // 使用动画器不断更新场景
  sceneAnimation() {
    this.renderer.setAnimationLoop(this.animate.bind(this));
  }

  flyTo(target, scale = 1, duration = 1000) {
    const targetPosition = new THREE.Vector3().copy(target.position);
    const targetFocus = new THREE.Vector3().copy(target.targetContent);

    // 移动相机位置
    new TWEEN.Tween(this.camera.position)
      .to(targetPosition, target.time || 500)
      .easing(TWEEN.Easing.Quadratic.InOut)
      .onUpdate(() => {
        this.controls.update(); // 更新控制器
      })
      .start();

    // 移动控制器目标
    new TWEEN.Tween(this.controls.target)
      .to(targetFocus, target.time || 500)
      .easing(TWEEN.Easing.Quadratic.InOut)
      .onUpdate(() => {
        this.controls.update(); // 更新控制器
      })
      .start();

    new TWEEN.Tween(this.model.scale).to({
      x: scale,
      y: scale,
      z: scale
    }, duration).easing(TWEEN.Easing.Quadratic.InOut).start();
  }

  tag3D(name) {
    // 创建div元素(作为标签)
    let div = document.createElement('div');
    div.innerHTML = name;
    div.classList.add('tag3d');
    //div元素包装为CSS3模型对象CSS3DObject
    let label = new CSS3DSprite(div);
    div.style.pointerEvents = 'none'; //避免HTML标签遮挡三维场景的鼠标事件
    //缩放CSS3DObject模型对象
    label.scale.set(0.15, 0.15, 0.15); //根据相机渲染范围控制HTML 3D标签尺寸
    label.rotateY(Math.PI / 2); //控制HTML标签CSS3对象姿态角度
    return label; //返回CSS3模型标签
  }

  createDialog(html) {
    //div元素包装为CSS3模型对象CSS3DSprite
    const element = document.createElement('div');
    element.className = 'customDialog';
    element.appendChild(html);
    const dialog = new CSS3DSprite(element);
    element.style.pointerEvents = 'none'; //避免HTML标签遮挡三维场景的鼠标事件
    // 设置HTML元素标签在three.js世界坐标中位置
    // label.position.set(x, y, z);
    //缩放CSS3DSprite模型对象
    dialog.scale.set(0.15, 0.15, 0.15); //根据相机渲染范围控制HTML 3D标签尺寸
    dialog.rotateY(Math.PI / 2); //控制HTML标签CSS3对象姿态角度
    return dialog; //返回CSS3模型标签
  }

  /**
   * 设置加载模型居中
   * {Object} object 模型对象
   */
  setModelPosition(object) {
    object.updateMatrixWorld();
    // 获得包围盒得min和max
    const box = new THREE.Box3().setFromObject(object);
    // 返回包围盒的中心点
    const center = box.getCenter(new THREE.Vector3());
    object.position.x += object.position.x - center.x;
    object.position.y += object.position.y - center.y;
    object.position.z = 0;
  }

  setGlbModel() {
    new GltfModelManager().loadModel('model-road-pv', '/models/model-road-pv.glb').then(object => {
      this.calcMeshCenter(object.scene);
      this.model = object.scene;
      const selectedObjects = [];
      object.scene.traverse(function (child) {
        if (child.isMesh) {
          child.material.emissive = child.material.color;
          child.material.emissiveMap = child.material.map;
        }
        // console.log(child.name)
        // if (["solar_cell097001", "solar_cell097002", "solar_cell097003", "solar_cell097004"].includes(child.name)) {
        //   selectedObjects.push(child);
        // }
      });

      // 设置相机位置
      this.camera.position.set(-20, -652, 500);
      this.controls.target.set(-20, -20, 0);
      this.model.scale.set(2, 2, 2);
      // 设置相机坐标系
      this.camera.lookAt(0, 0, 0);
      // 将模型添加到场景中去
      this.scene.add(this.model);
      // 高亮收集的对象
      // if (selectedObjects.length > 0) {
      //   this.outlineObj(selectedObjects);
      // }
    });
  }

  setFBXModel() {
    var fbxLoader = new GLTFLoader();
    fbxLoader.load('/models/main.glb', object => {
      this.calcMeshCenter(object.scene);
      this.model = object.scene;
      object.scene.traverse(function (child) {
        if (child.isMesh) {
          child.material.emissive = child.material.color;
          child.material.emissiveMap = child.material.map;
        }
      });

      // 设置相机位置
      this.camera.position.set(-20, -652, 500);
      this.controls.target.set(-20, -20, 0);
      this.model.scale.set(1, 1, 1);
      // 设置相机坐标系
      this.camera.lookAt(0, 0, 0);
      // 将模型添加到场景中去
      this.scene.add(this.model);
    });
  }

  onWindowResizes() {
    if (!this.container) return false;
    const {clientHeight, clientWidth} = this.container;
    //调整屏幕大小
    this.camera.aspect = clientWidth / clientHeight; // 摄像机宽高比例
    this.camera.updateProjectionMatrix(); //相机更新矩阵，将3d内容投射到2d面上转换
    this.renderer.setSize(clientWidth, clientHeight);
    this.css3DRenderer.setSize(clientWidth, clientHeight);
  }

  calcMeshCenter(group) {
    /**
     * 包围盒全自动计算：模型整体居中
     */
    var box3 = new THREE.Box3();
    // 计算层级模型group的包围盒
    // 模型group是加载一个三维模型返回的对象，包含多个网格模型
    box3.expandByObject(group);
    // 计算一个层级模型对应包围盒的几何体中心在世界坐标中的位置
    var center = new THREE.Vector3();
    box3.getCenter(center);
    // 重新设置模型的位置，使之居中。
    group.position.x = 0;
    group.position.y = 0;
    group.position.z = 17;
  }

  addDialog(html, labelName, position) {
    const {x, y, z} = position
    const label3D = this.tag3D(labelName);
    const dialog3D = this.createDialog(html); //设置标签名称
    label3D.position.y += y;
    label3D.position.x += x;
    label3D.position.z += z;
    dialog3D.position.copy(label3D.position);
    dialog3D.position.z = z + 20;
    this.scene.add(label3D);
    this.scene.add(dialog3D);
  }
}

export default renderModel;