import * as THREE from "three";
import * as d3 from "d3";
import mapData from "@/assets/map/zigong2.json";
import { CSS2DObject } from "three/examples/jsm/renderers/CSS2DRenderer";

// import textureMapImage from "@/assets/map/texture/gz-map.jpg";
import textureMapImage from "@/assets/images/screen/pageBg1.jpg";
import textureMapFxImage from "@/assets/map/texture/gz-map-fx.jpg";

import gsap from "gsap";

// 地图深度
const MAP_DEPTH = 0;

const projection = d3
  .geoMercator()
  .center([104.779307, 29.33924])
  .translate([0, 0, 0]);

const raycaster = new THREE.Raycaster();

export default class Map {
  constructor(experience) {
    this.experience = experience;
    this.scene = experience.scene;
    this.camera = experience.camera;

    this.provinceMeshList = [];
    this.labelList = [];
    this.textureLoader = new THREE.TextureLoader();
    this.setTexture();
    this.operationData(mapData);
    setTimeout(() => {
      this.enterAnimation();
    }, 500);
  }
  setTexture() {
    const textureMap = this.textureLoader.load(textureMapImage);
    const textureMapFx = this.textureLoader.load(textureMapFxImage);
    textureMap.wrapS = textureMapFx.wrapS = THREE.RepeatWrapping;
    textureMap.wrapT = textureMapFx.wrapT = THREE.RepeatWrapping;
    textureMap.flipY = textureMapFx.flipY = false;
    textureMap.rotation = textureMapFx.rotation = THREE.MathUtils.degToRad(45);
    const scale = 0.128;
    textureMap.repeat.set(scale, scale);
    textureMapFx.repeat.set(scale, scale);
    this.topFaceMaterial = new THREE.MeshPhongMaterial({
      map: textureMap,
      // color: 0xb4eeea,
      color: 0xb3fffa,
      combine: THREE.MultiplyOperation,
      transparent: true,
      opacity: 1,
    });
    this.sideMaterial = new THREE.MeshLambertMaterial({
      color: 0x123024,
      transparent: true,
      opacity: 0.9,
    });
  }

  /**
   * 解析json数据，并绘制地图多边形
   * @param {*} jsondata 地图数据
   */
  operationData(jsondata) {
    this.map = new THREE.Group();

    // geo信息
    const features = jsondata.features;
    features.forEach((feature) => {
      // 单个省份 对象
      const province = new THREE.Object3D();
      // 地址
      province.properties = feature.properties.name;
      province.isHover = false;
      // 多个情况
      // console.log(feature.geometry.type);
      if (feature.geometry.type === "MultiPolygon") {
        feature.geometry.coordinates.forEach((coordinate) => {
          coordinate.forEach((rows) => {
            const line = this.drawBoundary(rows);
            const mesh = this.drawExtrudeMesh(rows);
            province.add(line);
            province.add(mesh);
            this.provinceMeshList.push(mesh);
          });
        });
      }

      // 单个情况
      if (feature.geometry.type === "Polygon") {
        feature.geometry.coordinates.forEach((coordinate) => {
          const line = this.drawBoundary(coordinate);
          const mesh = this.drawExtrudeMesh(coordinate);
          province.add(line);
          province.add(mesh);
          this.provinceMeshList.push(mesh);
        });
      }
      const label = this.drawLabelText(feature);
      this.labelList.push({ name: feature.properties.name, label });
      province.add(label);
      this.map.add(province);
    });
    this.map.position.set(1, 1, -1.5);
    this.map.scale.set(10, 10, 1);
    this.map.rotation.set(
      THREE.MathUtils.degToRad(-90),
      0,
      THREE.MathUtils.degToRad(20)
    );
    this.scene.add(this.map);

    this.setMouseEvent();
  }

  /**
   * 画区域分界线
   * @param {*} polygon 区域坐标点数组
   * @returns 区域分界线
   */
  drawBoundary(polygon) {
    const points = [];
    for (let i = 0; i < polygon.length; i++) {
      const [x, y] = projection(polygon[i]);
      points.push(new THREE.Vector3(x, -y, 0));
    }
    const lineGeometry = new THREE.BufferGeometry().setFromPoints(points);
    const lineMaterial = new THREE.LineBasicMaterial({
      color: 0xffffff,
      linewidth: 2,
      transparent: true,
      depthTest: false,
    });
    const line = new THREE.Line(lineGeometry, lineMaterial);
    line.translateZ(MAP_DEPTH + 0.001);
    return line;
  }
  /**
   * 绘制区域多边形
   * @param {*} polygon 区域坐标点数组
   * @returns 区域多边形
   */
  drawExtrudeMesh(polygon) {
    const shape = new THREE.Shape();
    for (let i = 0; i < polygon.length; i++) {
      const [x, y] = projection(polygon[i]);
      if (i === 0) {
        shape.moveTo(x, -y);
      }
      shape.lineTo(x, -y);
    }
    const geometry = new THREE.ExtrudeGeometry(shape, {
      depth: MAP_DEPTH,
      bevelEnabled: false,
      bevelSegments: 1,
      bevelThickness: 0.1,
    });
    return new THREE.Mesh(geometry, [this.topFaceMaterial, this.sideMaterial]);
  }

  drawLabelText(province) {
    const [x, y] = projection(province.properties.center);
    const div = document.createElement("div");
    // const icon = document.createElement("div");
    div.innerHTML = province.properties.name;
    div.style.padding = "4px 10px";
    div.style.color = "#fff";
    div.style.fontSize = "18px";
    div.style.position = "absolute";
    // div.style.display = "flex";
    // div.style.justifyContent = 'center'
    // div.style.backgroundColor = 'rgba(25,25,25,0.5)';
    // div.style.border = '5px';
    // icon.style.borderRadius = '100%'
    // icon.style.background = '#aaffa5'
    // icon.style.width = '10px'
    // icon.style.height = '10px'
    // div.appendChild(icon);
    const label = new CSS2DObject(div);
    div.style.pointerEvents = "none";
    label.position.set(x, y, MAP_DEPTH + 0.05);
    return label;
  }

  setMouseEvent() {
    this.mouseEvent = this.handleEvent.bind(this);
    this.experience.canvas.addEventListener("mousemove", this.mouseEvent);
  }

  removeMouseEvent() {
    this.experience.canvas.removeEventListener("mousemove", this.mouseEvent);
  }

  handleEvent(e) {
    // console.log(this);
    // return;
    if (this.map) {
      let mouse = new THREE.Vector2();
      let getBoundingClientRect =
        this.experience.canvas.getBoundingClientRect();
      let x =
        ((e.clientX - getBoundingClientRect.left) /
          getBoundingClientRect.width) *
          2 -
        1;
      let y =
        -(
          (e.clientY - getBoundingClientRect.top) /
          getBoundingClientRect.height
        ) *
          2 +
        1;
      mouse.x = x;
      mouse.y = y;

      raycaster.setFromCamera(mouse, this.camera.instance);

      let intersects = raycaster.intersectObjects(this.provinceMeshList, false);

      if (intersects.length) {
        let temp = intersects[0].object;
        this.animation(temp.parent);
        this.showLabel(temp.parent);
      } else {
        this.animation();
      }
    }
  }

  throttle(callback, delay) {
    let lastCall = 0;
    return function () {
      let now = new Date().getTime();
      if (now - lastCall >= delay) {
        lastCall = now;
        callback.apply(null, arguments);
      }
    };
  }

  animation(province) {
    if (province) {
      if (!province.isHover) {
        province.isHover = true;
        this.map.children.forEach((item) => {
          if (item.properties === province.properties) {
            gsap.to(province.position, {
              z: 0.12,
              duration: 0.6,
            });
          } else {
            this.resetAnimation(item);
          }
        });
      }
    } else {
      this.resetAllAnimation();
    }
  }

  resetAnimation(province) {
    gsap.to(province.position, {
      z: 0,
      duration: 0.6,
      onComplete: () => {
        province.isHover = false;
      },
    });
  }

  resetAllAnimation() {
    this.map.children.forEach((item) => {
      this.resetAnimation(item);
    });
  }

  showLabel(province) {
    this.labelList.forEach((item) => {
      // if (item.name === province.properties) {
      //     item.label.element.style.visibility = 'visible';
      // } else {
      //     item.label.element.style.visibility = 'hidden';
      // }
    });
  }

  enterAnimation() {
    gsap.to(this.map.scale, {
      z: 10,
      duration: 0.6,
      ease: "power1.out",
    });
  }

  destroy() {
    this.removeMouseEvent();
    this.disposeObject();
    this.removeObject();
    this.resetObject();
  }

  disposeObject() {
    this.map.traverse((child) => {
      if (child.material) {
        // 可能存在材质为数组的情况
        if (child.material instanceof Array) {
          child.material.forEach((item) => item.dispose());
        } else {
          child.material.dispose();
          if (child.material.map) {
            child.material.map.dispose();
          }
        }
      }
      if (child.geometry) {
        child.geometry.dispose();
        child.geometry.attributes = null; // 这些属性包括position, normal, uv等等
      }
      child = null;
    });
    this.topFaceMaterial.dispose();
    this.sideMaterial.dispose();
  }

  removeObject() {
    this.scene.remove(this.map);
  }

  resetObject() {
    this.map = null;
    this.provinceMeshList = null;
    this.labelList = null;
    this.textureLoader = null;
  }
}