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{ getArcParams } from '@antv/g-canvas';\nimport { isNumberEqual, isEqual, isFunction } from '@antv/util';\n\nimport { IShape, PathCommand } from '../../dependents';\nimport { GAnimateCfg } from '../../interface';\nimport { AnimateExtraCfg } from '../interface';\n\nimport { getArcPath, getSectorPath } from '../../util/graphics';\n\nfunction getAngle(startPoint: number[], arcPath: PathCommand) {\n  let { startAngle, endAngle } = getArcParams(startPoint, arcPath);\n\n  if (!isNumberEqual(startAngle, -Math.PI * 0.5) && startAngle < -Math.PI * 0.5) {\n    startAngle += Math.PI * 2;\n  }\n  if (!isNumberEqual(endAngle, -Math.PI * 0.5) && endAngle < -Math.PI * 0.5) {\n    endAngle += Math.PI * 2;\n  }\n\n  if (arcPath[5] === 0) {\n    // 逆时针，需要将 startAngle 和 endAngle 转置，因为 G2 极坐标系为顺时针方向\n    [startAngle, endAngle] = [endAngle, startAngle];\n  }\n\n  if (isNumberEqual(startAngle, Math.PI * 1.5)) {\n    startAngle = Math.PI * -0.5;\n  }\n\n  // 当 startAngle, endAngle 接近相等时，不进行 endAngle = Math.PI * 1.5 防止变化从整个圆开始\n  if (isNumberEqual(endAngle, Math.PI * -0.5) && !isNumberEqual(startAngle, endAngle)) {\n    endAngle = Math.PI * 1.5;\n  }\n\n  return {\n    startAngle,\n    endAngle,\n  };\n}\n\nfunction getArcStartPoint(path: PathCommand) {\n  let startPoint;\n  if (path[0] === 'M' || path[0] === 'L') {\n    startPoint = [path[1], path[2]];\n  } else if (path[0] === 'a' || path[0] === 'A' || path[0] === 'C') {\n    startPoint = [path[path.length - 2], path[path.length - 1]];\n  }\n\n  return startPoint;\n}\n\n/**\n * path 存在以下情况\n * 1. 饼图不为整圆的 path，命令为 M, L, A, L, Z\n * 2. 饼图为整圆的 path，命令为 M, M, A, A, M, Z\n * 3. 环图不为整圆的 path，命令为 M, A, L, A, L, Z\n * 4. 环图为整圆的 path，命令为 M, A, A, M, A, A, M, Z\n * 5. radial-line, 不为整圆时的 path, 命令为 M, A, A, Z\n * 6. radial-line, 为整圆时的 path，命令为 M, A, A, A, A, Z\n * @param path theta 坐标系下圆弧的 path 命令\n */\nexport function getArcInfo(path: PathCommand[]) {\n  let startAngle;\n  let endAngle;\n\n  const arcPaths = path.filter((command) => {\n    return command[0] === 'A' || command[0] === 'a';\n  });\n\n  if (arcPaths.length === 0) {\n    return {\n      startAngle: 0,\n      endAngle: 0,\n      radius: 0,\n      innerRadius: 0,\n    };\n  }\n\n  const firstArcPathCommand = arcPaths[0];\n  const lastArcPathCommand = arcPaths.length > 1 ? arcPaths[1] : arcPaths[0];\n  const firstIndex = path.indexOf(firstArcPathCommand);\n  const lastIndex = path.indexOf(lastArcPathCommand);\n  const firstStartPoint = getArcStartPoint(path[firstIndex - 1]);\n  const lastStartPoint = getArcStartPoint(path[lastIndex - 1]);\n\n  const { startAngle: firstStartAngle, endAngle: firstEndAngle } = getAngle(firstStartPoint, firstArcPathCommand);\n  const { startAngle: lastStartAngle, endAngle: lastEndAngle } = getAngle(lastStartPoint, lastArcPathCommand);\n\n  if (isNumberEqual(firstStartAngle, lastStartAngle) && isNumberEqual(firstEndAngle, lastEndAngle)) {\n    startAngle = firstStartAngle;\n    endAngle = firstEndAngle;\n  } else {\n    startAngle = Math.min(firstStartAngle, lastStartAngle);\n    endAngle = Math.max(firstEndAngle, lastEndAngle);\n  }\n\n  let radius = firstArcPathCommand[1];\n  let innerRadius = arcPaths[arcPaths.length - 1][1];\n  if (radius < innerRadius) {\n    [radius, innerRadius] = [innerRadius, radius];\n  } else if (radius === innerRadius) {\n    innerRadius = 0;\n  }\n\n  return {\n    startAngle,\n    endAngle,\n    radius,\n    innerRadius,\n  };\n}\n\n/**\n * @ignore\n * 饼图更新动画\n * @param shape 文本图形\n * @param animateCfg\n * @param cfg\n */\nexport function sectorPathUpdate(shape: IShape, animateCfg: GAnimateCfg, cfg: AnimateExtraCfg) {\n  const { toAttrs, coordinate } = cfg;\n  const path = (toAttrs as { path: PathCommand[] }).path || [];\n  const pathCommands = path.map((command) => command[0]);\n\n  if (path.length < 1) return;\n\n  const { startAngle: curStartAngle, endAngle: curEndAngle, radius, innerRadius } = getArcInfo(path);\n  const { startAngle: preStartAngle, endAngle: preEndAngle } = getArcInfo(shape.attr('path'));\n\n  const center = coordinate.getCenter();\n  const diffStartAngle = curStartAngle - preStartAngle;\n  const diffEndAngle = curEndAngle - preEndAngle;\n  // 没有 diff 时直接返回最终 attrs，不需要额外动画\n  if (diffStartAngle === 0 && diffEndAngle === 0) {\n    shape.attr(toAttrs);\n    return;\n  }\n\n  shape.animate(\n    (ratio) => {\n      const onFrameStartAngle = preStartAngle + ratio * diffStartAngle;\n      const onFrameEndAngle = preEndAngle + ratio * diffEndAngle;\n      return {\n        ...toAttrs,\n        path:\n          // hack, 兼容 /examples/bar/basic/demo/radial-line.ts 动画\n          isEqual(pathCommands, ['M', 'A', 'A', 'Z'])\n            ? getArcPath(center.x, center.y, radius, onFrameStartAngle, onFrameEndAngle)\n            : getSectorPath(center.x, center.y, radius, onFrameStartAngle, onFrameEndAngle, innerRadius),\n      };\n    },\n    {\n      ...animateCfg,\n      callback: () => {\n        // 将 path 保持原始态，否则会影响 setState() 的动画\n        shape.attr('path', path);\n        isFunction(animateCfg.callback) && animateCfg.callback();\n      },\n    }\n  );\n}\n"]}