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

// export interface AntTreeNodeProps {
//   disabled: PropTypes.bool,
//   disableCheckbox: PropTypes.bool,
//   title?: string | React.ReactNode;
//   key?: string;
//   isLeaf: PropTypes.bool,
//   children?: React.ReactNode;
// }

// export interface AntTreeNode extends React.Component<AntTreeNodeProps, {}> {}

// export interface AntTreeNodeEvent {
//   event: 'check' | 'select';
//   node: AntTreeNode;
//   checked: PropTypes.bool,
//   checkedNodes?: Array<AntTreeNode>;
//   selected: PropTypes.bool,
//   selectedNodes?: Array<AntTreeNode>;
// }

// export interface AntTreeNodeMouseEvent {
//   node: AntTreeNode;
//   event: React.MouseEventHandler<any>;
// }

export const TreeProps = () => ({
  treeNodes: PropTypes.array,
  showLine: PropTypes.bool,
  /** 是否支持多选 */
  multiple: PropTypes.boolean,
  /** 是否自动展开父节点 */
  autoExpandParent: PropTypes.boolean,
  /** 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,
  /** 默认展开所有树节点 */
  defaultExpandAll: PropTypes.bool,
  /** 默认展开指定的树节点 */
  defaultExpandedKeys: PropTypes.arrayOf(PropTypes.string),
  /** （受控）展开指定的树节点 */
  expandedKeys: PropTypes.arrayOf(PropTypes.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(PropTypes.string),
  /** （受控）设置选中的树节点 */
  selectedKeys: PropTypes.arrayOf(PropTypes.string),
  /** 默认选中的树节点 */
  defaultSelectedKeys: PropTypes.arrayOf(PropTypes.string),
  /** 展开/收起节点时触发 */
  // onExpand?: (expandedKeys: Array<string>, info: { node: AntTreeNode, expanded: boolean }) => void | PromiseLike<any>;
  /** 点击复选框触发 */
  // onCheck?: (checkedKeys: Array<string>, e: AntTreeNodeEvent) => void;
  /** 点击树节点触发 */
  // onSelect?: (selectedKeys: Array<string>, e: AntTreeNodeEvent) => void;
  /** filter some AntTreeNodes as you need. it should return true */
  filterAntTreeNode: PropTypes.func,
  /** 异步加载数据 */
  loadData: PropTypes.func,
  /** 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;
  prefixCls: PropTypes.string,
  filterTreeNode: PropTypes.func,
  showIcon: PropTypes.bool,
  openAnimation: PropTypes.any,
})

export default {
  name: 'ATree',
  TreeNode: { ...TreeNode, name: 'ATreeNode' },
  props: initDefaultProps(TreeProps(), {
    prefixCls: 'ant-tree',
    checkable: false,
    showIcon: false,
    openAnimation: animation,
  }),
  model: {
    prop: 'checkedKeys',
    event: 'check',
  },
  methods: {
    handleCheck (checkedKeys, e) {
      this.$emit('check', checkedKeys, e)
    },
    handelSelect (selectedKeys, e) {
      this.$emit('select', selectedKeys, e)
      this.$emit('update:select', selectedKeys)
    },
    handleExpand (expandedKeys, info) {
      this.$emit('expand', expandedKeys, info)
      this.$emit('update:expand', expandedKeys)
    },
    renderTreeNodes (data = []) {
      const { $slots, $scopedSlots } = this
      return data.map((item) => {
        const { children, on = {}, slots = {}, scopedSlots = {}, key, class: cls, style, ...restProps } = item
        const treeNodeProps = {
          props: {
            ...restProps,
            icon: restProps.icon ||
              $slots[slots.icon] ||
              ($scopedSlots[scopedSlots.icon] && $scopedSlots[scopedSlots.icon]),
            title: restProps.title ||
             $slots[slots.title] ||
             ($scopedSlots[scopedSlots.title] && $scopedSlots[scopedSlots.title])(item),
            dataRef: item,
          },
          on,
          key,
          class: cls,
          style,
        }
        if (children) {
          return (
            <TreeNode {...treeNodeProps}>
              {this.renderTreeNodes(children)}
            </TreeNode>
          )
        }
        return <TreeNode {...treeNodeProps} />
      })
    },
  },

  render () {
    const props = getOptionProps(this)
    const { prefixCls, checkable, treeNodes, ...restProps } = props
    const { handelSelect, handleCheck, handleExpand, renderTreeNodes } = this
    const vcTreeProps = {
      props: {
        ...restProps,
        prefixCls,
        checkable: checkable ? <span class={`${prefixCls}-checkbox-inner`} /> : checkable,
      },
      on: {
        ...this.$listeners,
        check: handleCheck,
        select: handelSelect,
        expand: handleExpand,
      },
    }
    return (
      <VcTree {...vcTreeProps}>
        {treeNodes ? renderTreeNodes(treeNodes) : this.$slots.default}
      </VcTree>
    )
  },
}