import warning from 'warning'
import { Tree as VcTree, TreeNode } from '../vc-tree'
import animation from '../_util/openAnimation'
import PropTypes from '../_util/vue-types'
import { initDefaultProps, getOptionProps } from '../_util/props-util'
import Icon from '../icon'

function TreeProps () {
  return {
    showLine: PropTypes.bool,
    /** 是否支持多选 */
    multiple: PropTypes.bool,
    /** 是否自动展开父节点 */
    autoExpandParent: PropTypes.bool,
    /** checkable状态下节点选择完全受控（父子节点选中状态不再关联）*/
    checkStrictly: PropTypes.bool,
    /** 是否支持选中 */
    checkable: PropTypes.bool,
    /** 是否禁用树 */
    disabled: PropTypes.bool,
    /** 默认展开所有树节点 */
    defaultExpandAll: PropTypes.bool,
    /** 默认展开对应树节点 */
    defaultExpandParent: PropTypes.bool,
    /** 默认展开指定的树节点 */
    defaultExpandedKeys: PropTypes.arrayOf(String),
    /** （受控）展开指定的树节点 */
    expandedKeys: PropTypes.arrayOf(String),
    /** （受控）选中复选框的树节点 */
    checkedKeys: PropTypes.oneOfType(
      [
        PropTypes.arrayOf(PropTypes.string),
        PropTypes.shape({
          checked: PropTypes.arrayOf(String),
          halfChecked: PropTypes.arrayOf(String),
        }).loose,
      ]
    ),
    /** 默认选中复选框的树节点 */
    defaultCheckedKeys: PropTypes.arrayOf(String),
    /** （受控）设置选中的树节点 */
    selectedKeys: PropTypes.arrayOf(String),
    /** 默认选中的树节点 */
    defaultSelectedKeys: PropTypes.arrayOf(String),
    selectable: PropTypes.bool,
    /** 展开/收起节点时触发 */
    // onExpand: (expandedKeys: string[], info: AntTreeNodeExpandedEvent) => void | PromiseLike<any>,
    /** 点击复选框触发 */
    // onCheck: (checkedKeys: string[] | { checked: string[]; halfChecked: string[] }, e: AntTreeNodeCheckedEvent) => void,
    /** 点击树节点触发 */
    // onSelect: (selectedKeys: string[], e: AntTreeNodeSelectedEvent) => void,
    /** 单击树节点触发 */
    // onClick: (e: React.MouseEvent<HTMLElement>, node: AntTreeNode) => void,
    /** 双击树节点触发 */
    // onDoubleClick: (e: React.MouseEvent<HTMLElement>, node: AntTreeNode) => void,
    /** filter some AntTreeNodes as you need. it should return true */
    filterAntTreeNode: PropTypes.func,
    /** 异步加载数据 */
    loadData: PropTypes.func,
    loadedKeys: PropTypes.arrayOf(String),
    // onLoaded: (loadedKeys: string[], info: { event: 'load', node: AntTreeNode; }) => void,
    /** 响应右键点击 */
    // onRightClick: (options: AntTreeNodeMouseEvent) => void,
    /** 设置节点可拖拽（IE>8）*/
    draggable: PropTypes.bool,
    // /** 开始拖拽时调用 */
    // onDragStart: (options: AntTreeNodeMouseEvent) => void,
    // /** dragenter 触发时调用 */
    // onDragEnter: (options: AntTreeNodeMouseEvent) => void,
    // /** dragover 触发时调用 */
    // onDragOver: (options: AntTreeNodeMouseEvent) => void,
    // /** dragleave 触发时调用 */
    // onDragLeave: (options: AntTreeNodeMouseEvent) => void,
    // /** drop 触发时调用 */
    // onDrop: (options: AntTreeNodeMouseEvent) => void,
    showIcon: PropTypes.bool,
    icon: PropTypes.func,
    prefixCls: PropTypes.string,
    filterTreeNode: PropTypes.func,
    openAnimation: PropTypes.any,
    treeNodes: PropTypes.array,
    treeData: PropTypes.array,
  }
}

export { TreeProps }

export default {
  name: 'ATree',
  model: {
    prop: 'checkedKeys',
    event: 'check',
  },
  props: initDefaultProps(TreeProps(), {
    prefixCls: 'ant-tree',
    checkable: false,
    showIcon: false,
    openAnimation: {
      on: animation,
      props: { appear: null },
    },
  }),
  created () {
    warning(
      !('treeNodes' in getOptionProps(this)),
      '`treeNodes` is deprecated. please use treeData instead.'
    )
  },
  TreeNode,
  methods: {
    renderSwitcherIcon ({ isLeaf, expanded, loading }) {
      const {
        prefixCls,
        showLine,
      } = this.$props
      if (loading) {
        return (
          <Icon
            type='loading'
            class={`${prefixCls}-switcher-loading-icon`}
          />
        )
      }
      if (showLine) {
        if (isLeaf) {
          return (
            <Icon
              type='file'
              class={`${prefixCls}-switcher-line-icon`}
            />
          )
        }
        return (
          <Icon
            type={expanded ? 'minus-square' : 'plus-square'}
            class={`${prefixCls}-switcher-line-icon`}
            theme='outlined'
          />
        )
      } else {
        if (isLeaf) {
          return null
        }
        return (
          <Icon type='caret-down' class={`${prefixCls}-switcher-icon`} theme='filled' />
        )
      }
    },
    updataTreeData (treeData) {
      const { $slots, $scopedSlots } = this
      return treeData.map((item) => {
        const { children, on = {}, slots = {}, scopedSlots = {}, key, class: cls, style, ...restProps } = item
        const treeNodeProps = {
          ...restProps,
          icon: $slots[slots.icon] || ($scopedSlots[scopedSlots.icon] && $scopedSlots[scopedSlots.icon]) || restProps.icon,
          title: $slots[slots.title] || ($scopedSlots[scopedSlots.title] && $scopedSlots[scopedSlots.title](item)) || restProps.title,
          dataRef: item,
          on,
          key,
          class: cls,
          style,
        }
        if (children) {
          return { ...treeNodeProps, children: this.updataTreeData(children) }
        }
        return treeNodeProps
      })
    },
  },
  render () {
    const props = getOptionProps(this)
    const { prefixCls, showIcon, treeNodes } = props
    const checkable = props.checkable
    let treeData = props.treeData || treeNodes
    if (treeData) {
      treeData = this.updataTreeData(treeData)
    }
    const vcTreeProps = {
      props: {
        ...props,
        checkable: checkable ? <span class={`${prefixCls}-checkbox-inner`} /> : checkable,
        children: this.$slots.default || [],
        __propsSymbol__: Symbol(),
        switcherIcon: this.renderSwitcherIcon,
      },
      on: {
        ...this.$listeners,
      },
      ref: 'tree',
      class: !showIcon && `${prefixCls}-icon-hide`,
    }
    if (treeData) {
      vcTreeProps.props.treeData = treeData
    }
    return (
      <VcTree {...vcTreeProps} />
    )
  },
}