<template>
  <div class="game-container">
    <canvas ref="canvasRef" :width="clientObj.width" :height="clientObj.height"></canvas>
  </div>
</template>

<script setup name="HumanBody" lang="ts">
const { proxy } = getCurrentInstance() as any;
const router = useRouter();
const canvasRef = ref(null);

const data = reactive<any>({
  bodyposeData: {},//姿态信息
  clientObj: {},//浏览器对象
  boxes: [],//四个点坐标
  proportion: null,//人框和屏幕比例
});

const { bodyposeData, clientObj, boxes, proportion } = toRefs(data);

/**
 * 初始化
 */
const getInit = (e: any) => {
  let arr = e.data.result.keypoints;
  let result = [];
  for (let i = 0; i < arr.length; i += 3) {
    result.push(arr.slice(i, i + 2));
  }
  console.log("result", result)
  bodyposeData.value = result;
  if (boxes.value.length == 0) {
    // speckText("识别成功");
    // proxy?.$modal.msgWarning(`识别成功`);
    let arr = e.data.result.boxes;
    boxes.value = [{ x: arr[0], y: arr[3] }, { x: arr[0], y: arr[1] }, { x: arr[2], y: arr[1] }, { x: arr[2], y: arr[3] }]
    proportion.value = (clientObj.value.height / (arr[3] - arr[1])).toFixed(2);
  }
  //绘制图案
  getCanvas();
};

/**
 * 绘图
*/
const getCanvas = () => {
  const canvas: any = canvasRef.value;
  const ctx = canvas.getContext('2d');
  // 清空整个画布
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  // 保存当前状态 
  ctx.save();
  function calculateOffset(a: any, b: any) {
    return {
      x: b.x - a.x,
      y: b.y - a.y
    };
  }
  const pointA = { x: clientObj.value.width / 2, y: clientObj.value.height / 2 };
  const pointB = { x: (boxes.value[2].x + boxes.value[0].x) / 2, y: (boxes.value[3].y + boxes.value[1].y) / 2 };
  const offset = calculateOffset(pointA, pointB);
  ctx.translate(-offset.x, -offset.y);
  // console.log("Canvas分辨率", clientObj.value);
  // console.log("人体图片四点坐标", boxes.value)
  // console.log("Canvas中心", pointA);
  // console.log("人体中心", pointB);
  // console.log("offset", offset)
  // console.log("proportion.value",proportion.value)
  const originalPoints = bodyposeData.value;
  // 计算缩放后坐标
  const postData = originalPoints.map((point: any) => {
    const newX = (point[0] - pointB.x) * proportion.value + pointB.x;
    const newY = (point[1] - pointB.y) * proportion.value + pointB.y;
    return [newX, newY];
  });
  // console.log("原始坐标：", originalPoints);
  // console.log("缩放后坐标：", postData);

  //绘制头部
  const point1 = { x: postData[4][0], y: postData[4][1] };
  const point2 = { x: postData[3][0], y: postData[3][1] };
  // 计算椭圆参数
  const centerX = (point1.x + point2.x) / 2; // 椭圆中心X
  const centerY = (point1.y + point2.y) / 2; // 椭圆中心Y
  const distance = Math.sqrt(
    Math.pow(point2.x - point1.x, 2) +
    Math.pow(point2.y - point1.y, 2)
  ); // 两个焦点之间的距离
  const radiusX = distance * 0.5; // 水平半径（可调整）
  const radiusY = distance * 0.6; // 垂直半径（可调整）
  // 1. 绘制填充椭圆
  ctx.beginPath();
  ctx.ellipse(centerX, centerY, radiusX, radiusY, 0, 0, Math.PI * 2);
  ctx.fillStyle = 'red'; // 填充颜色
  ctx.fill(); // 填充
  // 2. 绘制边框
  ctx.strokeStyle = 'red';
  ctx.lineWidth = 5;
  ctx.stroke();
  // 绘制每个点
  postData.forEach((point: any, index: number) => {
    //眼睛鼻子不显示
    if (![0, 1, 2].includes(index)) {
      const [x, y] = point;
      ctx.beginPath();
      ctx.arc(x, y, 5, 0, Math.PI * 2); // 绘制半径为5的圆点
      ctx.fillStyle = 'red';
      ctx.fill();
      ctx.lineWidth = 1;
      ctx.stroke();
    }
  });
  // 根据点关系连线
  const arr = [[10, 8], [8, 6], [6, 5], [5, 7], [7, 9], [6, 12], [5, 11], [12, 11], [12, 14], [14, 16], [11, 13], [13, 15]]
  arr.forEach((point: any) => {
    let index1 = point[0];
    let index2 = point[1];
    //连线
    const dian1 = { x: postData[index1][0], y: postData[index1][1] };
    const dian2 = { x: postData[index2][0], y: postData[index2][1] };
    // 绘制连线
    ctx.beginPath();
    ctx.moveTo(dian1.x, dian1.y); // 起点
    ctx.lineTo(dian2.x, dian2.y); // 终点
    ctx.strokeStyle = 'red'; // 线条颜色
    ctx.lineWidth = 3; // 线条宽度
    ctx.stroke(); // 描边
  });
  ctx.restore(); // 恢复状态
};

onBeforeMount(() => {
});

onMounted(() => {
  clientObj.value = {
    width: document.querySelector('.game-container').offsetWidth,
    height: document.querySelector('.game-container').offsetHeight,
  }
})

onBeforeUnmount(() => {
});

//暴露给父组件用
defineExpose({
  getInit
})
</script>

<style lang="scss" scoped>
.game-container {
  background: #000000;
  position: relative;
  width: 100%;
  height: 100vh;
  margin: 0 auto;
  overflow: hidden;
}
</style>
