<template>
  <!-- mousedown事件放在页面最外层，确保鼠标在页面任意点按下都会旋转照片墙 -->
  <div
    id="m"
    class="page"
    ref="draggable"
    @mousedown="startDrag"
  >
    <div id="container">
      <div class="header">
        <div class="rightLineClass"></div>
        <div class="leftLineClass"></div>
      </div>
      <div class="main">
        <div class="leftPage"></div>
        <div class="rightPage"></div>
        <div class="btnPage"></div>
        <div class="btnPp"></div>
        <div class="wall">
          <!-- 旋转ring的dom元素实现整个照片墙的偏转 -->
          <div
            class="ring"
            :style="{ transform: `rotateX(${rotateX}deg) rotateY(${rotateY}deg)`,transition: `transform ${transTime}s ease 0s` }"
          >
            <!-- 照片墙的图片，使用transform实现立体的环形照片墙 -->
            <!-- translateZ属性控制每一面的距离，也会把image-wall等比例放大 -->
            <div
              v-for="(itemP,indexP) in tabData.scenList"
              class="image-wall"
              style="transition: transform 1s ease 0.5s;"
              :style="{ transform: `rotateY(${60 * indexP}deg) translateZ(400px)` }"
              @click="toPage(itemP.url)"
            >
              <div class="animate-border">
                <i></i>
                <i></i>
              </div>
              <img
                :src="itemP.img"
                alt=""
              >
            </div>
          </div>
        </div>
      </div>
      <div class="foot">
        <div
          class="fItems"
          v-for="(item,index) in tabData.tabList"
          @click="changeTab(index)"
        >
          <div :class="tabData.tabNum == index ? 'fiTopC' : 'fiTop'">
            <img
              :src="item.img"
              alt=""
            >
          </div>
          <div
            class="tabGif"
            v-if="tabData.tabNum == index"
          ></div>
          <div :class="tabData.tabNum == index ? 'fiCenC' : 'fiCen'"></div>
          <div class="fiText"> {{ item.name }} </div>
        </div>
      </div>
    </div>

  </div>

</template>
 
<script setup>
import { ref, onMounted, onUnmounted, reactive } from 'vue';
import { useRouter, useRoute } from "vue-router";
import tab1 from "@/assets/guide/tab1.png";
import tab2 from "@/assets/guide/tab2.png";
import tab3 from "@/assets/guide/tab3.png";
import tab4 from "@/assets/guide/tab4.png";
import tab5 from "@/assets/guide/tab5.png";
import tab6 from "@/assets/guide/tab6.png";
import png1 from "@/assets/guide/Dp/1.png";
import png2 from "@/assets/guide/Dp/2.png";
import png3 from "@/assets/guide/Dp/3.png";
import png4 from "@/assets/guide/Dp/4.png";
import png5 from "@/assets/guide/Dp/5.png";
import png6 from "@/assets/guide/Dp/6.png";
const router = useRouter();
const routers = useRoute();

const draggable = ref(null);
const transTime = ref(0) // 参考系动画时长
const rotateY = ref(0)  // 参考系偏转角度，动态赋值
const rotateX = ref(0)
const startX = ref(0)  // 鼠标按下时开始的坐标
const startY = ref(0)
let dragging = false;  // 是否监听鼠标移动

// 鼠标按下时触发
const startDrag = (event) => {
  dragging = true;  // 开始偏转
  startX.value = event.clientX; //记录按下时的坐标
  startY.value = event.clientY;
  document.addEventListener('mousemove', doDrag); // 开始监听鼠标移动和鼠标放开事件
  document.addEventListener('mouseup', stopDrag);

};

// 鼠标移动事件
const doDrag = (event) => {
  // 如果不加dragging判断，放开鼠标一样会改变坐标
  if (dragging) {
    // 计算移动偏转的角度
    let dy = ((event.clientX - startX.value) / 1080) * 90;
    let dx = ((event.clientY - startY.value) / 1920) * 160 * -1;
    // 鼠标移动后，现在鼠标的位置变成下一次鼠标移动事件的初始位置
    startX.value = event.clientX;
    startY.value = event.clientY;
    // 偏转角度赋值
    rotateX.value += dx
    rotateY.value += dy
  }
};

// 鼠标放开事件
const stopDrag = () => {
  dragging = false; // 不可改变偏转角度
  document.removeEventListener('mousemove', doDrag);  // 销毁监听器
  document.removeEventListener('mouseup', stopDrag);
};

onUnmounted(() => {
  // 清理事件监听器
  stopDrag();
});
const reset_font = () => {
  let width = document.documentElement.clientWidth || document.body.clientWidth;
  let height =
    document.documentElement.clientHeight || document.body.clientHeight;
  document.querySelector("#m").style.transformOrigin = "top left";
  document.querySelector("#m").style.transform =
    "scale(" + width / 1920 + "," + height / 1080 + ")";
};
onMounted(() => {
  reset_font();
  reset_font();
});
window.addEventListener("resize", function () {
  reset_font();
  reset_font();
});

// 底部数据
const tabData = reactive({
  tabNum: 0,
  tabList: [
    {
      name: '概况',
      img: tab1,
    },
    {
      name: '养老体系',
      img: tab2,
    },
    {
      name: '卫生体系',
      img: tab3,
    },
    {
      name: '教育体系',
      img: tab4,
    },
    {
      name: '救助体系',
      img: tab5,
    },
    {
      name: '智能分析',
      img: tab6,
    },
  ],
  scenList: [
    {
      img: png1,
      url: '/home/index',
    },
    {
      img: png2,
      url: '/home/yl',
    },
    {
      img: png3,
      url: '/home/hygiene',
    },
    {
      img: png4,
      url: '/home/education',
    },
    {
      img: png5,
      url: '/home/work',
    },
    {
      img: png6,
      url: '/home/analyze',
    },
  ]
})

const changeTab = (val) => {
  transTime.value = 0.8
  tabData.tabNum = val
  rotateY.value = 360 - (60 * val)
  rotateX.value = 0
  setTimeout(() => {
    transTime.value = 0
  }, 800);
}
const toPage = (val) => {
  router.push({
    path: `${val}`,
  });
}
</script>

<style lang='scss' scoped>
.page {
  /* 所有元素不可选中，避免影响mousemove的监听 */
  user-select: none;
  background: url("../assets/guide/bg.png") no-repeat 0/100% 100%;
}
* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  // color: #ccffff;
}
html {
  width: 100%;
  height: 100%;
}
body {
  width: 100%;
  height: 100%;
}
#m {
  width: 100%;
  height: 100%;
  overflow: hidden;
  // position: absolute;
  z-index: 101;
}
#container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}
.header {
  background-image: url(../assets/guide/header.png);
  background-size: 100% 100%;
  display: flex;
  height: 125px;
  width: 100%;
  // background-color: beige;
  position: relative;

  .rightLineClass {
    position: absolute;
    width: 760px;
    height: 260px;
    right: -45px;
    bottom: -70px;
    background-image: url(../assets/guide/RightLine.gif);
    background-size: 100% 100%;
  }
  .leftLineClass {
    position: absolute;
    width: 760px;
    height: 260px;
    transform: scaleX(-1);
    left: -45px;
    bottom: -70px;
    background-image: url(../assets/guide/RightLine.gif);
    background-size: 100% 100%;
  }
}
.main {
  pointer-events: none;
  padding-top: 60px;
  height: 550px;
  position: relative;
  .leftPage {
    position: absolute;
    width: 220px;
    height: 540px;
    left: 145px;
    background-image: url(../assets/guide/leftImg.png);
    background-size: 100% 100%;
  }
  .rightPage {
    position: absolute;
    width: 220px;
    height: 540px;
    right: 145px;
    background-image: url(../assets/guide/leftImg.png);
    background-size: 100% 100%;
    transform: scaleX(-1);
  }
  .btnPage {
    position: absolute;
    width: 1366px;
    height: 347px;
    bottom: -200px;
    left: 270px;
    background-image: url(../assets/guide/btnImg.png);
    background-size: 100% 100%;
  }
  .btnPp {
    position: absolute;
    width: 500px;
    height: 320px;
    bottom: -115px;
    left: 694px;
    background-image: url(../assets/guide/min-pp.gif);
    background-size: 100% 100%;
  }
}
.wall {
  perspective: 1000px;
  width: 400px;
  height: 237px;
  margin: auto;
  margin-top: 190px;
  pointer-events: all;
}

.ring {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.1s ease-in-out;
}

.image-wall {
  width: 80%;
  height: 80%;
  position: absolute;
  top: 0;
  left: 40px;
  cursor: pointer;
  background-image: url(../assets/guide/itemBg.png);
  background-size: 100% 100%;
  // 添加倒影
  -webkit-box-reflect: below 10px -webkit-linear-gradient(top, rgba(0, 0, 0, 0)
        60%, rgba(0, 0, 0, 0.2) 100%);
  overflow: hidden;
  /* 利用伪元素和两个i元素产生4条线 */
  .animate-border {
    position: absolute;
    top: 0px;
    width: 100%;
    height: 100%;
    &::before,
    &::after {
      content: "";
      position: absolute;
      width: 100%;
      height: 2px;
    }
    i {
      position: absolute;
      display: inline-block;
      height: 100%;
      width: 2px;
    }
    &::before {
      top: 0;
      left: -100%;
      background-image: linear-gradient(90deg, transparent, #fff, transparent);

      animation: one 4s linear infinite;
    }
    i:nth-child(1) {
      top: -100%;
      right: 0;
      background-image: linear-gradient(180deg, transparent, #fff, transparent);
      /* 动画名称  动画持续时间  动画渲染函数 动画延迟时间 动画执行次数 */
      animation: two 4s linear 3s infinite;
    }
    &::after {
      bottom: 0;
      right: -100%;
      background-image: linear-gradient(
        -90deg,
        transparent,
        #ffffff,
        transparent
      );
      animation: three 4s linear 2s infinite;
    }
    i:nth-child(2) {
      bottom: -100%;
      left: 0;
      background-image: linear-gradient(360deg, transparent, #fff, transparent);
      animation: four 4s linear 1s infinite;
    }
  }
}
@keyframes one {
  0% {
    left: 100%;
  }
  50%,
  100% {
    left: -100%;
  }
}

@keyframes two {
  0% {
    top: 100%;
  }
  50%,
  100% {
    top: -100%;
  }
}

@keyframes three {
  0% {
    right: 100%;
  }
  50%,
  100% {
    right: -100%;
  }
}

@keyframes four {
  0% {
    bottom: 100%;
  }
  50%,
  100% {
    bottom: -100%;
  }
}

.image-wall img {
  width: calc(100% - 20px);
  height: calc(100% - 20px);
  margin: 10px;
}

.foot {
  display: flex;
  justify-content: space-around;
  width: 100%;
  padding: 0 80px;
  height: 200px;
  margin-top: 150px;
  border-bottom: 1px solid #71ddff;
  position: relative;
  &::after {
    content: "";
    position: absolute;
    width: 200px;
    height: 2px;
  }
  &::after {
    top: 200px;
    left: -200px;
    background-image: linear-gradient(90deg, transparent, #fff, transparent);
    animation: footAni 4s linear infinite;
  }
  @keyframes footAni {
    0% {
      left: -200px;
    }
    100% {
      left: 100%;
    }
  }
  .fItems {
    width: 180px;
    height: 180px;
    position: relative;
    .fiTop {
      width: 100%;
      img {
        width: 86px;
        height: 100px;
        margin: 0 47px;
      }
    }
    .fiTopC {
      width: 100%;
      animation: example 1.82s infinite linear;
      img {
        width: 86px;
        height: 100px;
        margin: 0 47px;
      }
    }
    @keyframes example {
      0% {
        transform: translateY(0);
      }
      25% {
        transform: translateY(-3px);
      }
      50% {
        transform: translateY(0);
      }
      75% {
        transform: translateY(3px);
      }
      100% {
        transform: translateY(0);
      }
    }
    .fiCen {
      width: 180px;
      height: 126px;
      background-image: url(../assets/guide/tabBtn.png);
      background-size: 100% 100%;
      position: absolute;
      top: 40px;
    }
    .fiCenC {
      width: 180px;
      height: 126px;
      background-image: url(../assets/guide/tabBtnC.png);
      background-size: 100% 100%;
      position: absolute;
      top: 40px;
    }
    .tabGif {
      width: 100%;
      height: 140px;
      position: absolute;
      top: -20px;
      left: 10px;
      background-image: url(../assets/guide/bt-pp.gif);
      background-size: 100% 100%;
    }
    .fiText {
      position: absolute;
      bottom: -10px;
      width: 100%;
      height: 31px;
      line-height: 31px;
      text-align: center;
      color: #fff;
      font-size: 18px;
      letter-spacing: 2px;
      text-shadow: 0px 0px 4px #58b9ff;
    }
  }
}
</style>