import { css } from '@emotion/css';
import { ISchema, observer } from '@formily/react';
import { Button, Dropdown, Menu, Switch } from 'antd';
import classNames from 'classnames';
import React, { createContext, useContext, useState } from 'react';
import { Icon } from '../icon';
import { useCompile, useDesignable } from '../schema-component/hooks';
import './style.less';
import {
  SchemaInitializerButtonProps,
  SchemaInitializerItemComponent,
  SchemaInitializerItemOptions,
  SchemaInitializerItemProps,
} from './types';

const defaultWrap = (s: ISchema) => s;

export const SchemaInitializerItemContext = createContext(null);
export const SchemaInitializerButtonContext = createContext<any>({});

export const SchemaInitializer = () => null;

const menuItemGroupCss = 'nb-menu-item-group';

SchemaInitializer.Button = observer((props: SchemaInitializerButtonProps) => {
  const {
    title,
    insert,
    wrap = defaultWrap,
    items = [],
    insertPosition = 'beforeEnd',
    dropdown,
    component,
    style,
    icon,
    onSuccess,
    ...others
  } = props;
  const compile = useCompile();
  let { insertAdjacent, findComponent, designable } = useDesignable();
  const [visible, setVisible] = useState(false);
  const insertSchema = (schema) => {
    if (props.insert) {
      props.insert(wrap(schema));
    } else {
      insertAdjacent(insertPosition, wrap(schema), { onSuccess });
    }
  };
  const renderItems = (items: any) => {
    return items
      .filter((v) => {
        return v && (v?.visible ? v.visible() : true);
      })
      ?.map((item, indexA) => {
        if (item.type === 'divider') {
          return <Menu.Divider key={item.key || `item-${indexA}`} />;
        }
        if (item.type === 'item' && item.component) {
          const Component = findComponent(item.component);
          item.key = `${item.key || item.title}-${indexA}`;
          return (
            Component && (
              <SchemaInitializerItemContext.Provider
                key={item.key}
                value={{
                  index: indexA,
                  item,
                  info: item,
                  insert: insertSchema,
                }}
              >
                <Component
                  {...item}
                  item={{
                    ...item,
                    title: compile(item.title),
                  }}
                  insert={insertSchema}
                />
              </SchemaInitializerItemContext.Provider>
            )
          );
        }
        if (item.type === 'itemGroup') {
          return (
            !!item.children?.length && (
              <Menu.ItemGroup key={item.key || `item-group-${indexA}`} title={compile(item.title)}>
                {renderItems(item.children)}
              </Menu.ItemGroup>
            )
          );
        }
        if (item.type === 'subMenu') {
          return (
            !!item.children?.length && (
              <Menu.SubMenu
                key={item.key || `item-group-${indexA}`}
                title={compile(item.title)}
                popupClassName={menuItemGroupCss}
              >
                {renderItems(item.children)}
              </Menu.SubMenu>
            )
          );
        }
      });
  };
  const menu = <Menu style={{ maxHeight: '60vh', overflowY: 'auto' }}>{renderItems(items)}</Menu>;
  if (!designable && props.designable !== true) {
    return null;
  }
  return (
    <SchemaInitializerButtonContext.Provider value={{ visible, setVisible }}>
      <Dropdown
        className={classNames('nb-schema-initializer-button')}
        openClassName={`nb-schema-initializer-button-open`}
        overlayClassName={classNames(
          'nb-schema-initializer-button-overlay',
          css`
            .ant-dropdown-menu-item-group-list {
              max-height: 40vh;
              overflow: auto;
            }
          `,
        )}
        open={visible}
        onOpenChange={(visible) => {
          setVisible(visible);
        }}
        {...dropdown}
        overlay={menu}
      >
        {component ? (
          component
        ) : (
          <Button
            type={'dashed'}
            style={{
              borderColor: '#f18b62',
              color: '#f18b62',
              ...style,
            }}
            {...others}
            icon={<Icon type={icon as string} />}
          >
            {compile(props.children || props.title)}
          </Button>
        )}
      </Dropdown>
    </SchemaInitializerButtonContext.Provider>
  );
});

SchemaInitializer.Item = (props: SchemaInitializerItemProps) => {
  const { index, info } = useContext(SchemaInitializerItemContext);
  const compile = useCompile();
  const { eventKey, items = [], children = info?.title, icon, onClick, ...others } = props;
  if (items?.length > 0) {
    const renderMenuItem = (items: SchemaInitializerItemOptions[]) => {
      if (!items?.length) {
        return null;
      }
      return items.map((item, indexA) => {
        if (item.type === 'divider') {
          return <Menu.Divider key={`divider-${indexA}`} />;
        }
        if (item.type === 'itemGroup') {
          return (
            <Menu.ItemGroup
              // @ts-ignore
              eventKey={item.key || `item-group-${indexA}`}
              key={item.key || `item-group-${indexA}`}
              title={compile(item.title)}
              className={menuItemGroupCss}
            >
              {renderMenuItem(item.children)}
            </Menu.ItemGroup>
          );
        }
        if (item.type === 'subMenu') {
          return (
            <Menu.SubMenu
              // @ts-ignore
              eventKey={item.key || `sub-menu-${indexA}`}
              key={item.key || `sub-menu-${indexA}`}
              title={compile(item.title)}
            >
              {renderMenuItem(item.children)}
            </Menu.SubMenu>
          );
        }
        return (
          <Menu.Item
            eventKey={item.key}
            key={item.key}
            onClick={(info) => {
              item?.clearKeywords?.();
              if (item.onClick) {
                item.onClick({ ...info, item });
              } else {
                onClick({ ...info, item });
              }
            }}
          >
            {compile(item.title)}
          </Menu.Item>
        );
      });
    };
    return (
      <Menu.SubMenu
        // @ts-ignore
        eventKey={eventKey ? `${eventKey}-${index}` : info.key}
        key={info.key}
        title={compile(children)}
        icon={typeof icon === 'string' ? <Icon type={icon as string} /> : icon}
      >
        {renderMenuItem(items)}
      </Menu.SubMenu>
    );
  }
  return (
    <Menu.Item
      // {...others}
      key={info.key}
      eventKey={eventKey ? `${eventKey}-${index}` : info.key}
      icon={typeof icon === 'string' ? <Icon type={icon as string} /> : icon}
      onClick={(opts) => {
        info?.clearKeywords?.();
        onClick({ ...opts, item: info });
      }}
    >
      {compile(children)}
    </Menu.Item>
  );
};

SchemaInitializer.itemWrap = (component?: SchemaInitializerItemComponent) => {
  return component;
};

SchemaInitializer.SwitchItem = (props) => {
  return (
    <SchemaInitializer.Item onClick={props.onClick}>
      <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between' }}>
        {props.title} <Switch style={{ marginLeft: 20 }} size={'small'} checked={props.checked} />
      </div>
    </SchemaInitializer.Item>
  );
};