import * as THREE from 'three';
import * as d3 from 'd3';
import mapData from '@/assets/map/zigong2.json';

import textureMapImage from '@/assets/map/texture/gz-map.jpg';
import textureMapFxImage from '@/assets/map/texture/gz-map-fx.jpg';
import { BufferGeometryUtils } from 'three/examples/jsm/utils/BufferGeometryUtils.js';

import gsap from 'gsap';
// 地图深度
const MAP_DEPTH = 0.2;

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 = this.experience.scene;
        this.camera = this.experience.camera;
        this.material = null;
        this.textureLoader = new THREE.TextureLoader();
        this.setTexture();
        this.operationData(mapData);
    }
    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.Object3D();
        // 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;
            // 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);
                    });
                });
            }

            // 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);
                });
            }
            // 合并成一个mesh
            // const mergedGeometry = BufferGeometryUtils.mergeGeometries(province.children);
            
            this.map.add(province);
        });
        this.map.position.set(1, 1, -1.5);
        this.map.scale.set(10, 10, 10);
        this.map.rotation.set(THREE.MathUtils.degToRad(-90), 0, THREE.MathUtils.degToRad(20));
        // this.container = new THREE.Object3D();
        // this.container.add(this.map);
        this.scene.add(this.map);
        console.log(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,
        ]);
    }


    setMouseEvent() {
        this.mouseEvent = this.handleEvent.bind(this);
        // this.experience.canvas.addEventListener("mousemove", this.throttle(this.mouseEvent,100));
        this.experience.canvas.addEventListener("mousemove", this.mouseEvent);
    }

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

    handleEvent(e) {
        // console.log(this);
        // return;
        if (this.map) {
            const mouse = new THREE.Vector2();
            mouse.x = (e.clientX / window.innerWidth) * 2 - 1;
            mouse.y = -(e.clientY / window.innerHeight) * 2 + 1;
            raycaster.setFromCamera(mouse, this.camera.instance);
            const intersects = raycaster.intersectObjects(this.map.children, true);
            if (intersects.length) {
                intersects.forEach((item) => {
                    if (item.object)
                        if (item.object.meshName === 'province') {
                            console.log(item.object);
                            this.animation(item.object);
                        }
                });
            }
        }
    }

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

    animation(mesh) {
        console.log(mesh);
    }
}