import * as React from 'react'
import { StandardProps, FormItemStandardProps, StructDataStandardProps, keyType, RegularAttributes } from '../@types/common'
import { ReactNode } from "react"

export interface CascaderProps<Item, Value> extends StandardProps, FormItemStandardProps<Value>, StructDataStandardProps<Item>  {
  /**
   * show border bottom
   *
   * 仅仅展示下边框
   *
   * default: false
   */
   underline?: boolean;

  /**
   * When it is true, the pop-up layer of option append into document.body.
   *
   * 为 true 时，选项弹出层在 DOM 中独立 render
   *
   * default: false
   */
  absolute?: boolean;

  /**
   * the key of the children data name
   *
   * 指定子数据的属性名
   *
   * default: 'children'
   */
  childrenKey?: string;

  /**
   * If clearable is true, show clear value icon
   *
   * 是否显示清除数据图标
   *
   * default: true
   */
  clearable?: boolean;

  /**
   * Merges selected values
   *
   * 将选中值合并
   *
   * default: false
   */
  compressed?: boolean | 'no-repeat';

  /**
   * data. The child node is children. If the children value is null or its length is 0, it is render as a leaf node.
   *
   * 数据，子节点为children，如果 children 值为 null 或 长度为 0 时，视为叶子节点
   *
   * default: []
   */
  data?: Item[];

  /**
   * When it is true, all nodes disable the selection; when it is a function, it determines whether it is disabled according to the return result of the function.
   *
   * 如果 disabled 为 true，禁用全部选项，如果 disabled 为函数，根据函数反回结果禁用选项
   *
   * default: false
   */
  disabled?: (data: Item) => boolean | boolean;

  /**
   * Expand mode
   *
   * 节点展开触发方式
   *
   * default: 'click'
   */
  expandTrigger?: 'click' | 'hover' | 'hover-only';

  /**
   * close options after chose the final node
   *
   * 选择末级节点后是否关闭选项列表
   *
   * default: false
   */
  finalDismiss?: boolean;

  /**
   * Auxiliary method for generating key. When it is a function, use the return value of this function. When it is a string, use the data value corresponding to this string. For example, 'id' is the same thing as (d) => d.id.
   *
   * 生成key的辅助方法, 为函数时，使用此函数返回值, 为string时，使用这个string对应的数据值。如 'id'，相当于 (d) => d.id
   *
   * default: index
   */
  keygen: ((data: Item, parentKey: keyType) => keyType) | string;

  /**
   * If the loader attribute is a function, the node with no children is regarded as dynamically loaded node. Click expanded button to trigger the loader event. The children property is null or its length is 0 will be regarded as a leaf node.
   *
   * 设置loader属性后，未定义children的节点视为动态加载节点，点击展开触发 loader事件，children 为 null 或者长度为 0 视为叶子节点
   *
   * default:
   */
  loader?: (key: keyType, data: Item) => void;

  /**
   * mode 0: Returns only the fully selected node including the parent node. 1: Returns all selected nodes and semi-selected nodes. 2: Return only the selected child nodes. 3: If the parent node is full selected, only return the parent node.
   *
   * 选中值模式，未设置值为单选 0: 只返回完全选中的节点，包含父节点 1: 返回全部选中的节点和半选中的父节点 2: 只返回选中的子节点 3: 如果父节点选中，只返回父节点
   *
   * default: -
   */
  mode?: 0 | 1 | 2 | 3;

  /**
   * When the onChange property is set, the selection box is displayed. The parameter is the current selected value, which is related to the mode property.
   *
   * 设置 onChange 属性时，显示 选择框。参数为当前选中值，和 mode 属性相关
   *
   * default: -
   */
  onChange?: (value: Value, selected: boolean) => void;

  /**
   * options collapse callback
   *
   * 下拉列表展开/收起回调
   *
   * default: none
   */
  onCollapse?: (collapse: boolean) => void;

  /**
   * size
   *
   * 尺寸
   *
   * defualt: none
   */
  size?: RegularAttributes.Size;

  /**
   * Support single node deletion
   *
   * 支持单个节点删除
   *
   * default: none
   */
  singleRemove?: boolean;

  /**
   * render unmatch value
   *
   * 是否展示data中不存在的值
   *
   * default: -
   */
   unmatch?: boolean;

  /**
   * show dropdown arrow, only single select
   *
   * 是否显示下拉箭头，仅针对单选情况
   *
   * default: true
   */
  showArrow?: boolean;

  /**
   *  A reference to the binding component, you can call some component methods
   *
   *  绑定组件的引用, 可以调用某些组件的方法
   *
   *  default: -
   *
   */
  getComponentRef?: (comp: componentRef )=> void | {current?: componentRef};

  /**
   *  dropdown list loading state
   *
   *  下拉列表加载状态
   *
   *  default: -
   *
   */
  loading?: boolean | ReactNode;

  /**
   * when compressed is True,the comptessedBound can limit the numbers of multiple selected item's label
   *
   * 开启多选后，指定允许展示标签数量，超过后将折叠
   *
   * default: -
   */
   compressedBound?: number;

  /**
   * When the onFilter is not empty, you can filter data by input.If the onFilter returns a function, use this function as a front-end filter.If return undefined, you can do your own backend filtering.support in single selection state.
   *
   * onFilter 不为空时，可以输入过滤数据;onFilter 如果返回一个函数，使用这个函数做前端过滤;如果不返回，可以自行做后端过滤;单选状态下支持
   *
   * default: -
   */
   onFilter?: (text: string) => (data: any) => boolean;
}

interface componentRef  {
  close: () => void;
  [propName: string]: any;
}

declare class Cascader<Item = any, Value = string[]> extends React.Component<CascaderProps<Item, Value>, {}> {
  render(): JSX.Element
}

export default Cascader