class ColorManager {
  private colors: Array<string> = [];

  /**
   * 调色盘注册
   * @param colors
   */
  public registe(colors) {
    const isEmpty = (Array.isArray(this.colors) && this.colors.length === 0) || !this.colors;
    if (isEmpty) {
      this.colors = colors;
    }
  }

  /**
   * 从调色盘中挑选颜色
   * @param pickInfo
   * @returns pickedColors
   * TODO：待支持指定的配色策略（如Pie图按照相邻色系配色等）
   */
  public pick(pickInfo: any) {
    const { colors } = this;
    const {
      count, // 获取颜色对象的数量
    } = pickInfo;

    // 从调色盘提取颜色队列
    let pickedColors = [];
    if (!pickInfo || !count) {
      pickedColors = colors;
    } else if (count <= colors.length + 1) {
      pickedColors = colors.slice(0, count);
    } else {
      const restLength = count - (colors.length + 1);
      pickedColors = [...colors, ...colors.slice(0, restLength)];
    }

    return pickedColors;
  }
}


export default ColorManager;