import * as THREE from 'three'
import Stats from 'three/addons/libs/stats.module.js';
import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls'
import TWEEN from '@tweenjs/tween.js';

const help = false;
const debugCamera = {
    x: 200,
    y: 200,
    z: 200
}

export default class ShelfThree {

    constructor(dom) {
        const { current: container } = dom;
        this.fullWidth = container.offsetWidth;
        this.fullHeight = container.offsetHeight;
        this.scene = this.initScene();
        this.camera = this.initCamera();
        this.renderer = this.initRenderer(container);
        this.controls = this.initControls();
        this.stats = this.initStats(container);
        this.windowResize();
        this.initRaycaster(container);
        initLight(this.scene);

        this.objects = [];
    }

    startup = () => {
        this.animate();
        this.build();
    }

    animate = () => {
        requestAnimationFrame(this.animate);
        this.render();
        TWEEN.update();
    }

    render = () => {
        this.renderer.shadowMap.enabled = true;
        this.renderer.render(this.scene, this.camera);
        this.stats.update();
        // Rotate the scene
        this.controls.update()
        this.controls.autoRotateSpeed = 0.6;
    }

    addObject = (object) => {
        this.scene.add(object);
        this.objects.push(object);
    }

    initScene = () => {
        const scene = new THREE.Scene();
        // scene.background = new THREE.Color(0xf0f0f0);
        // scene.background = new THREE.Color(0x333333);
        if (help) {
            scene.add(new THREE.AxesHelper(1000));
        }
        return scene;
    }

    initCamera = () => {
        const camera = new THREE.PerspectiveCamera(70, window.innerWidth / window.innerHeight, 1, 10000);
        camera.position.set(debugCamera.x, debugCamera.y, debugCamera.z);
        this.scene.add(camera);
        return camera;
    }

    initRenderer = (container) => {
        const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });
        renderer.setClearAlpha(0);
        // renderer.useLegacyLights = false;  // 旧版光源 重要
        renderer.shadowMap.enabled = true;
        // this.renderer.shadowMap.type = THREE.BasicShadowMap;    // 最低阴影
        // this.renderer.toneMapping = THREE.ReinhardToneMapping;
        renderer.toneMapping = THREE.ACESFilmicToneMapping;
        renderer.setPixelRatio(window.devicePixelRatio);
        renderer.setSize(300, 500);
        container.appendChild(renderer.domElement);
        return renderer;
    }

    initControls = () => {
        const controls = new OrbitControls(this.camera, this.renderer.domElement);
        // controls.enableRotate = false; // 禁用整体旋转功能
        controls.enablePan = true; // 允许平移
        controls.enableDamping = true;   // 开启阻尼
        controls.dampingFactor = 0.08; // 阻尼因子
        controls.enableZoom = true; // 允许缩放
        // controls.minDistance = 1; // 最小缩放距离
        // controls.maxDistance = 30; // 最大缩放距离
        controls.minPolarAngle = 0; // 最小俯仰角度（向下看）
        controls.maxPolarAngle = Math.PI / 2.1; // 最大俯仰角度（向上看）
        controls.rotateSpeed = 0.6; // 视角移动速度减慢
        controls.autoRotate = true; // 自动旋转

        controls.target = new THREE.Vector3(0, 0, 0)  // 平替 camera的lookAt
        return controls;
    }

    initStats = (container) => {
        const stats = new Stats();
        container.appendChild(stats.dom);
        if (!help) {
            stats.domElement.style.display = 'none';
        }
        return stats;
    }

    windowResize = () => {
        let that = this;
        window.addEventListener('resize', function () {
            that.camera.aspect = window.innerWidth / window.innerHeight;
            that.camera.updateProjectionMatrix();
            that.renderer.setSize(that.fullWidth, that.fullHeight);
        }, false);
    }

    initRaycaster = (container) => {
        let that = this;
        const raycaster = new THREE.Raycaster();
        const mouse = new THREE.Vector2();

        container.addEventListener("click", (event) => {
            this.handleClick("null");
        })
        container.addEventListener("dblclick", (event) => {
            let x, y;
            if (event.changedTouches) {
                x = event.changedTouches[0].pageX;
                y = event.changedTouches[0].pageY;
            } else {
                x = event.clientX;
                y = event.clientY;
            }
            event.preventDefault();
            mouse.x = (x / window.innerWidth) * 2 - 1;
            mouse.y = -(y / window.innerHeight) * 2 + 1;
            raycaster.setFromCamera(mouse, that.camera);
            let intersects = raycaster.intersectObjects(that.objects, true);
            if (intersects.length === 0) {
                this.handleClick("null");
                return;
            }
            let objName = intersects[0].object.name;
            if (objName.startsWith("locNo")) {

                if (this.handleClick) {
                    this.handleClick(objName, x, y);
                }

            } else {
                this.handleClick("null");
            }

        }, false);
    }

    build = () => {
        // 1.build floor
        buildFloor(this.scene);
    }

    handleClick = () => {

    }
};

const initLight = (scene) => {

    const directionalLight = new THREE.DirectionalLight(0xffffff, 0.6); // 光颜色，强度
    directionalLight.position.set(1, 1, 1).normalize();
    scene.add(directionalLight);

    const ambientLight = new THREE.AmbientLight(0xf0f0f0, 3);
    scene.add(ambientLight);

    const spotLight = new THREE.SpotLight(0xffffff, 8);
    spotLight.position.set(1617, 2500, 4022);
    spotLight.angle = Math.PI * 1;
    spotLight.decay = 0;
    spotLight.castShadow = true;
    spotLight.shadow.camera.near = 200;
    spotLight.shadow.camera.far = 2000;
    spotLight.shadow.bias = - 0.000222;
    spotLight.shadow.mapSize.width = 1024;
    spotLight.shadow.mapSize.height = 1024;

    const targetObject = new THREE.Object3D();
    targetObject.position.set(1617, 0, 4022);
    spotLight.target = targetObject;

    scene.add(spotLight);
    if (help) {
        scene.add(new THREE.SpotLightHelper(spotLight));
    }
}

const buildFloor = (scene) => {
    const boxGeometry = new THREE.BoxGeometry(100, 100, 100); // 216为长度，10为宽度，10为高度
    const boxMaterial = new THREE.MeshBasicMaterial({ color: 0x40739e });
    const boxMesh = new THREE.Mesh(boxGeometry, boxMaterial);
    boxMesh.position.set(0, 0, 0); // 根据你的需求设置位置
    scene.add(boxMesh)
    return boxMesh;

    const size = 100;
    const divisions = 100;
    const helper = new THREE.GridHelper(size, divisions);
    helper.position.x = size / 2;
    helper.position.z = size / 2;
    helper.material.opacity = 0.25;
    helper.material.transparent = true;
    scene.add(helper);
    return helper;
}