const info = wx.getSystemInfoSync();
const dpi = info.pixelRatio;
const width = info.windowWidth * dpi;
const height = info.windowHeight * dpi;

Component({
  scene: null,
  properties: {},
  data: {
    width: width,
    height: height,
    loaded: false,
    arReady: false,
    placed: false,
    gateClosed: false
  },
  lifetimes: {
    attached() {
      wx.reportEvent("xr_frame", {
        "xr_page_path": '/pages/scene-last-record/index',
        "xr_last_record_click": 1
      });
    },
    detached() {
      this.bgm.stop();
      wx.setKeepScreenOn({keepScreenOn: false});
    }
  },
  methods: {
    handleReady({detail}) {
      this.scene = detail.value;
      this.scene.event.add('tick', this.handleTick.bind(this));
      this.inRealWorld = true;
      this.texts = {};
      this.textsIndex = {};
      this.bgm = wx.createInnerAudioContext({});
      this.bgm.src = 'https://mmbizwxaminiprogram-1258344707.cos.ap-guangzhou.myqcloud.com/xr-frame/demo/xr-frame-team/bgm.mp3';
      this.bgm.loop = true;
    },
    handleAssetsProgress: function ({detail}) {
      console.log('assets progress', detail.value);
    },
    handleARReady() {
      this.setData({arReady: true});
    },
    handleAssetsLoaded: function ({detail}) {
      console.log('assets loaded', detail.value);
      this.records = JSON.parse(this.scene.assets.getAsset('raw', 'records'));
      this.note = this.scene.assets.getAsset('raw', 'note');
      this.setData({loaded: true});
    },
    handleTick(dt) {
      this.syncTexts();

      if (!this.data.placed || !this.inRealWorld) {
        return;
      }

      const xrSystem = wx.getXrFrameSystem();
      const mainCamEl = this.scene.getElementById('main-camera');
      const mainTrs = mainCamEl.getComponent(xrSystem.Transform);
      const door = this.scene.getElementById('door').getComponent(xrSystem.Transform);

      let forward = door.worldForward;
      forward = xrSystem.Vector2.createFromNumber(forward.x, forward.z);
      let diff = mainTrs.worldPosition.sub(door.worldPosition);
      diff = xrSystem.Vector2.createFromNumber(diff.x, diff.z);
      const preDiff = this.diff || diff;
      this.diff = diff;

      const dis = diff.length();
      const preDis = preDiff.length();
      const dir = forward.dot(diff);
      this.startDis = this.startDis || dis;

      const blurAsset = this.scene.assets.getAsset('post-process', 'blur');
      const vignetteAsset = this.scene.assets.getAsset('post-process', 'vignette');
      const bloomAsset = this.scene.assets.getAsset('post-process', 'bloom');
      const edgeEnv1 = 0.5;
      const edgeEnv2 = 0.8;
      const edgeDoor1 = 0.3;
      const edgeDoor2 = 0.7;

      if (this.blurDuration) {
        this.blurDuration = Math.max(0, this.blurDuration - dt);
        const p = 1 - this.blurDuration / this.blurTotal;

        if (p <= edgeEnv1) {
          const progress = xrSystem.noneParamsEaseFuncs['ease-in-out'](p / edgeEnv1);
          vignetteAsset.data.intensity = progress * 2;
          blurAsset.data.radius = progress * 86 + 10;
        } else if (p > edgeEnv2) {
          const progress = xrSystem.noneParamsEaseFuncs['ease-in-out']((1 - p) / (1 - edgeEnv2));
          vignetteAsset.data.intensity = progress * 2;
          blurAsset.data.radius = progress * 96;
        }
        
        if (p >= edgeDoor1 && p < edgeDoor2) {
          const progress = xrSystem.noneParamsEaseFuncs['ease-in-out']((p - edgeDoor1) / (edgeDoor2 - edgeDoor1));
          door.scale.setValue(progress, 1, 1);
        }
      } else if (this.blurTotal) {
        let progress = (1 - Math.max(0, Math.min(dis / this.startDis, 0.8)));
        if (progress >= 0.2) {
          progress = (progress - 0.2) / 0.6;
          blurAsset.data.radius = progress * 96;
          vignetteAsset.data.intensity = progress * 2;
          bloomAsset.data.threshold = 0.5 + progress * 2;
        }
      }

      //@todo: 等待物理加上碰撞检测，替换
      if (dir >= 0 || preDis <= 0.2 || dis > 0.2) {
        return;
      }

      ['sky', 'scene-mesh', 'hikari', 'roam', 'xinyi'].forEach(id => {
        this.scene
          .getElementById(id)
          .getComponent(xrSystem.GLTF).meshes.forEach(mesh => mesh.material.setRenderState('stencilComp', 0));
      });
      mainCamEl.getComponent(xrSystem.Camera).setData({
        renderTarget: null,
        postProcess: ['tone']
      });
      this.setData({gateClosed: true});
      this.inRealWorld = false;
    },
    handleShowDoor({detail}) {
      if (detail.value.camera.el.id !== 'main-camera') {
        return;
      }

      const success = this.scene.ar.placeHere('setitem', true);
      if (!success) {
        return;
      }

      setTimeout(() => {
        this.blurTotal = this.blurDuration = 1700;
      }, 300);
      wx.setKeepScreenOn({keepScreenOn: true});
      this.bgm.play();
      this.setData({placed: true});
    },
    handleResume() {
      if (this.data.placed) {
        this.bgm.play();
      }
    },
    handleTouchNote({detail}) {
      if (detail.value.camera.el.id !== 'main-camera') {
        return;
      }

      this.triggerEvent('showNote', this.note);
    },
    handleTouchObj({detail}) {
      if (detail.value.camera.el.id !== 'main-camera') {
        return;
      }

      const xrSystem = wx.getXrFrameSystem();
      const {el, value} = detail;
      const {camera, target} = value;
      const id = target.id;
      let text = this.texts[id];
      const camTrs = camera.el.getComponent(xrSystem.Transform);
      const targetTrs = target.getComponent(xrSystem.Transform);
      const diff = camTrs.worldPosition.sub(targetTrs.worldPosition);
      const distance = Math.sqrt(diff.x * diff.x + diff.z * diff.z);

      if (!this.records[id]) {
        return;
      }

      const {y, d, texts: records} = this.records[id];

      if (distance > (d || 1.5)) {
        return;
      }

      if (text) {
        clearTimeout(text.timerId);
      }

      let index = this.textsIndex[id] === undefined ? -1 : this.textsIndex[id];
      if (index >= records.length - 1) {
        index = 0;
      } else {
        index += 1;
      }
      this.textsIndex[id] = index;

      this.texts[id] = {
        content: records[index],
        camera, target, y,
        timerId: setTimeout(() => {
          delete this.texts[id];
        }, 4000)
      };
    },
    syncTexts: function() {
      const texts = Object.keys(this.texts).map(id => {
        const {camera, target, content, y} = this.texts[id];
        const xrSystem = wx.getXrFrameSystem();
        const trs = target.getComponent(xrSystem.Transform);
        const tmp = trs.worldPosition.clone();
        tmp.y += y;
        const clipPos = camera.convertWorldPositionToClip(tmp);
        const {frameWidth, frameHeight} = this.scene;
  
        return {
          content, id,
          x: ((clipPos.x + 1) / 2) * frameWidth,
          y: (1 - (clipPos.y + 1) / 2) * frameHeight
        };
      });

      this.triggerEvent('changeTexts', texts);
    }
  }
})