import CharactorManager from "./CharactorManager.js";
import common from "./common.js";
import houseShader from "./houseShader.js";
import settings from "./settings.js";

export default class App {

    constructor(engine) {
        
        var scene = new BABYLON.Scene(engine);
        this.scene = scene
        scene.collisionsEnabled = true;
    
        var camera1 = new BABYLON.ArcRotateCamera("camera1", 0, Math.PI / 2, 10, new BABYLON.Vector3(0, 0, 0), scene);
        scene.activeCamera = camera1;
        scene.activeCamera.attachControl(scene.canvas, true);
        camera1.inertia = 0
        camera1.minZ = 0
        camera1.fov = Math.PI / 2
        camera1.fovMode = BABYLON.ArcRotateCamera.FOVMODE_HORIZONTAL_FIXED
        camera1.lowerBetaLimit = Math.PI / 2
        camera1.upperBetaLimit = Math.PI / 2
        camera1.lowerRadiusLimit = settings.camera.distanceFromCharactor;
        camera1.upperRadiusLimit = settings.camera.distanceFromCharactor;
        camera1.wheelDeltaPercentage = 0.01;
        camera1.angularSensibilityX /= 2;
        // camera1.targetScreenOffset = new BABYLON.Vector2(0, -1.65)
        this.camera = camera1
        this.lastCameraAlpha = 0
        // camera1.checkCollisions = true;
        // camera1.collisionRadius = new BABYLON.Vector3(0.1, 0.1, 0.1)
        
        // let self = this
        // var ray = new BABYLON.Ray(new BABYLON.Vector3(0,0,0), new BABYLON.Vector3(0,0,1), 50);
        // BABYLON.RayHelper.CreateAndShow(ray, scene, new BABYLON.Color3(1, 0.1, 0.1));
        // camera1.onCollide = function(mesh) {
        //     let targetPos = camera1.position.clone()
        //     targetPos.y = 1
        //     ray.origin = self.charactorManager.charactor.mesh.position
        //     ray.direction = BABYLON.Vector3.Normalize( targetPos.subtract(ray.origin) )
        //     var info = ray.intersectsMesh(mesh);
        //     if(!info.distance) return
        //     camera1.lowerRadiusLimit = Math.max(info.distance - 0.5, 0.2)
        //     camera1.upperRadiusLimit = Math.max(info.distance - 0.5, 0.2)
        //     console.error(info.distance)
        // }
        // console.error(camera1)

        
        var ray = new BABYLON.Ray(new BABYLON.Vector3(0,0,0), new BABYLON.Vector3(0,0,1), 50);
        BABYLON.RayHelper.CreateAndShow(ray, scene, new BABYLON.Color3(1, 0.1, 0.1));
        this.ray = ray
    
        // Lights
        var light = new BABYLON.HemisphericLight("light1", new BABYLON.Vector3(0, -1, 0), scene);
        light.intensity = 1.0;
        light.specular = BABYLON.Color3.Black();
    
        var light2 = new BABYLON.HemisphericLight("dir01", new BABYLON.Vector3(0, 1, 0), scene);
        light2.intensity = 0.1;
        light2.position = new BABYLON.Vector3(0, 5, 5);
    
        // Skybox
        var skybox = BABYLON.MeshBuilder.CreateBox("skyBox", { size: 1000.0 }, scene);
        var skyboxMaterial = new BABYLON.StandardMaterial("skyBox", scene);
        skyboxMaterial.backFaceCulling = false;
        skyboxMaterial.reflectionTexture = new BABYLON.CubeTexture("textures/environment.env", scene);
        skyboxMaterial.reflectionTexture.coordinatesMode = BABYLON.Texture.SKYBOX_MODE;
        skyboxMaterial.diffuseColor = new BABYLON.Color3(0, 0, 0);
        skyboxMaterial.specularColor = new BABYLON.Color3(0, 0, 0);
        skybox.material = skyboxMaterial;

        this.init()
        this.bindEvents()
    }

    init() {
        let self = this
        BABYLON.SceneLoader.ImportMesh("", "../scenes/house/", "000.glb", this.scene, function (newMeshes, particleSystems, skeletons, animationGroups) {
            
            self.house = newMeshes
            self.house[0].position = new BABYLON.Vector3(0.6, 2.1, 1.5)

            newMeshes.forEach(m => {
                // m.scaling.scaleInPlace(1.4);
                m._geometry && (m.checkCollisions = true)

                if(m.material) 
                {
                    BABYLON.Effect.ShadersStore['aFragmentShader'] = houseShader.fragment;
                    BABYLON.Effect.ShadersStore['aVertexShader'] = houseShader.vertex;
                
                    let shaderMaterial = new BABYLON.ShaderMaterial("shader", scene, { vertex: "a", fragment: "a", }, {
                        attributes: houseShader.attributes,
                        uniforms: houseShader.uniforms,
                        defines: houseShader.defines
                    });
                    
                    let videoTexture = new BABYLON.VideoTexture("", document.getElementById("houseTexture0"), scene)
                    // document.getElementById("houseTexture0").play()
                    // document.getElementById("houseTexture0").loop = "loop"

                    shaderMaterial.setTexture("texture_video", videoTexture)
                    shaderMaterial.setVector3("focal_width_height", new BABYLON.Vector3(735, settings.video.width, settings.video.height))   // 1100 470 860
                    shaderMaterial.setFloat("isYUV", 0)

                    m.material = shaderMaterial
                }
            });

            self.charactorManager = new CharactorManager(self)
            self.charactorManager.importCharactorModel("../scenes/charactors/", "man_YXL.glb")
        });
    }

    bindEvents() {

        this.scene.onPointerObservable.add((pointerInfo) => {

            switch (pointerInfo.type) {
                case BABYLON.PointerEventTypes.POINTERDOWN:
                    this.pointDown = true
                    break;

                case BABYLON.PointerEventTypes.POINTERUP:
                    this.pointDown = false
                    break;

                case BABYLON.PointerEventTypes.POINTERMOVE:
                    if(this.pointDown) this.rotateCamera()
                    break;

                case BABYLON.PointerEventTypes.POINTERWHEEL:
                    break;

                case BABYLON.PointerEventTypes.POINTERPICK:
                    break;

                case BABYLON.PointerEventTypes.POINTERTAP:
                    if(pointerInfo.pickInfo.hit && this.house.indexOf(pointerInfo.pickInfo.pickedMesh)) {
                        this.charactorManager.clickHouse()
                    }
                    break;

                case BABYLON.PointerEventTypes.POINTERDOUBLETAP:
                    break;
            }

        });

        this.scene.onBeforeAnimationsObservable.add(() => {

            if(this.charactorManager && this.charactorManager.charactor)
                this.charactorManager.onBeforeAnimation()

        })

        this.scene.onBeforeRenderObservable.add(() => {

            this.updateCameraPos()

        })
    }

    updateCameraPos() {

        if(!this.charactorManager || !this.charactorManager.charactor) return
        
        // 实时更新相机target
        let cameraTarget = this.charactorManager.charactor.mesh.position.clone()
        cameraTarget.y = 1.5
        this.camera.target = cameraTarget

        // 相机碰撞检测
        this.ray.origin = cameraTarget
        this.ray.direction = BABYLON.Vector3.Normalize( this.camera.position.clone().subtract(cameraTarget) )
        let info = this.ray.intersectsMeshes(this.house)[0];
        const offset = 0.5
        if(info.distance > settings.camera.distanceFromCharactor + offset) return
        this.camera.lowerRadiusLimit = Math.max( info.distance - offset, 0.1 )
        this.camera.upperRadiusLimit = Math.max( info.distance - offset, 0.1 )
        // console.error(info.pickedPoint, this.camera.position)

        // let r = this.cameraCollision()
        // this.camera.lowerRadiusLimit = Math.max( r, 0.1 )
        // this.camera.upperRadiusLimit = Math.max( r, 0.1 )

    }

    rotateCamera() {

        if(!this.charactorManager || !this.charactorManager.charactor) return

        let charactor = this.charactorManager.charactor

        if(charactor.actionType.split("-")[1] == "Walking") {
            // 行走时旋转相机，行走停止
            charactor.startWalk([], this.charactorManager)
        } 
        // 根据单个点位视频的总帧数，计算每一帧的度数，只在度数至少到达一帧时，才去请求视频
        else if(Math.abs(this.camera.alpha - this.lastCameraAlpha) >= Math.PI * 2 / settings.rotateVideoFrame)
        {
            this.lockCamera(true)
            let currentPath = charactor.walkData.pathArr[charactor.walkData.currentPoint]
            let startPoint = (currentPath && currentPath.point) || charactor.mesh.position
            let sendData = {
                type: "RotateCamera",
                point: { x: startPoint.x, y: startPoint.z },
                dirc: {
                    from: this.lastCameraAlpha % (Math.PI * 2),
                    to: this.camera.alpha % (Math.PI * 2)
                }
            }

            setTimeout(() => {
                // this.lastCameraAlpha = this.camera.alpha
                this.lockCamera(false)
            }, 10)

            // todo 发送数据
            // common.postData("", sendData).then(response => {
            
            //     this.updateHouseVideo(response[0].video)

            //     // this.lastCameraAlpha = this.camera.alpha
            //     this.lockCamera(false)

            // })

            this.lastCameraAlpha = this.camera.alpha
        }

    }

    lockCamera(isTrue) {
        this.camera.lowerAlphaLimit = isTrue ? this.camera.alpha : null
        this.camera.upperAlphaLimit = isTrue ? this.camera.alpha : null
    }

    updateHouseVideo(video) {
        let videoTexture = new BABYLON.VideoTexture("", video, this.scene)
        this.house.forEach(mesh => {
            mesh.material && mesh.material.setTexture("texture_video", videoTexture)
        })
        video.play()
    }

    // cameraCollision() {
    //     // if(this.cameraAngle) {
    //     //     let {info, point, normal} = this.getRayInfoOnCircle(this.cameraAngle)
    //     //     if( 
    //     //         Math.abs(info.distance - point.clone().subtract(this.ray.origin).length()) < 1 &&
    //     //         this.ray.origin.clone().subtract(info.pickedPoint).addInPlace(normal).length() <= 3.5 
    //     //     ) {
    //     //         return this.ray.origin.clone().subtract(info.pickedPoint).addInPlace(normal).length()
    //     //     } 
    //     //     else {
    //     //         this.cameraAngle = null
    //     //         return 3.5
    //     //     }
    //     // }

    //     for(let i = 0; i < Math.PI * 2; i += Math.PI / 8) {
    //         let {info, point, normal} = this.getRayInfoOnCircle(i)
    //         if( 
    //             Math.abs(info.distance - point.clone().subtract(this.ray.origin).length()) < 0.5 &&
    //             (this.ray.origin.clone().subtract(info.pickedPoint).addInPlace(normal).length() - 3.5) < 0.5  
    //         ) {
    //             // this.cameraAngle = i
    //             return this.ray.origin.clone().subtract(info.pickedPoint).addInPlace(normal).length()
    //         }
    //     }
    //     // this.cameraAngle = null
    //     return 3.5
    // }

    // getRayInfoOnCircle(angle) {
    //     let normal = new BABYLON.Vector3(0, 0, 0.5)
    //     normal.rotateByQuaternionToRef(BABYLON.Quaternion.RotationAxis(new BABYLON.Vector3(0, 1, 0), angle), normal)
    //     let point = this.camera.position.clone().addInPlace(normal)    // 圆上的点坐标
    //     let direction = BABYLON.Vector3.Normalize( point.clone().subtract(this.ray.origin) )
    //     var ray = new BABYLON.Ray(this.ray.origin, direction, 50);
    //     let info = ray.intersectsMeshes(this.house)[0];
    //     return { info: info, point: point, normal: normal }
    // }
}