import { defineComponent, ref, computed, watch, onBeforeUnmount, Transition } from 'vue';
import CloseOutlined from '@ant-design/icons-vue/CloseOutlined';
import FileTextOutlined from '@ant-design/icons-vue/FileTextOutlined';
import classNames from '../_util/classNames';
import { getTransitionProps } from '../_util/transition';
import FloatButton, { floatButtonPrefixCls } from './FloatButton';
import useConfigInject from '../config-provider/hooks/useConfigInject';
import { useProvideFloatButtonGroupContext } from './context';
import { findDOMNode, initDefaultProps } from '../_util/props-util';
import { floatButtonGroupProps } from './interface';
import type { FloatButtonGroupProps } from './interface';
import canUseDom from '../_util/canUseDom';

// CSSINJS
import useStyle from './style';
import useMergedState from '../_util/hooks/useMergedState';

const FloatButtonGroup = defineComponent({
  compatConfig: { MODE: 3 },
  name: 'AFloatButtonGroup',
  inheritAttrs: false,
  props: initDefaultProps(floatButtonGroupProps(), {
    type: 'default',
    shape: 'circle',
  } as FloatButtonGroupProps),
  setup(props, { attrs, slots, emit }) {
    const { prefixCls, direction } = useConfigInject(floatButtonPrefixCls, props);

    // style
    const [wrapSSR, hashId] = useStyle(prefixCls);

    const [open, setOpen] = useMergedState(false, { value: computed(() => props.open) });

    const floatButtonGroupRef = ref<HTMLDivElement>(null);
    const floatButtonRef = ref<HTMLButtonElement | HTMLAnchorElement>(null);

    useProvideFloatButtonGroupContext({
      shape: computed(() => props.shape),
    });
    const hoverTypeAction = {
      onMouseenter() {
        setOpen(true);
        emit('update:open', true);
        props.onOpenChange?.(true);
      },
      onMouseleave() {
        setOpen(false);
        emit('update:open', false);
        props.onOpenChange?.(false);
      },
    };
    const hoverAction = computed(() => {
      return props.trigger === 'hover' ? hoverTypeAction : {};
    });

    const handleOpenChange = () => {
      const nextOpen = !open.value;
      emit('update:open', nextOpen);
      props.onOpenChange?.(nextOpen);
      setOpen(nextOpen);
    };

    const onClick = (e: MouseEvent) => {
      if (floatButtonGroupRef.value?.contains(e.target as Node)) {
        if (findDOMNode(floatButtonRef.value)?.contains(e.target as Node)) {
          handleOpenChange();
        }
        return;
      }
      setOpen(false);
      emit('update:open', false);
      props.onOpenChange?.(false);
    };

    watch(
      computed(() => props.trigger),
      value => {
        if (!canUseDom()) {
          return;
        }
        document.removeEventListener('click', onClick);
        if (value === 'click') {
          document.addEventListener('click', onClick);
        }
      },
      { immediate: true },
    );
    onBeforeUnmount(() => {
      document.removeEventListener('click', onClick);
    });

    return () => {
      const { shape = 'circle', type = 'default', tooltip, description, trigger } = props;

      const groupPrefixCls = `${prefixCls.value}-group`;

      const groupCls = classNames(groupPrefixCls, hashId.value, attrs.class, {
        [`${groupPrefixCls}-rtl`]: direction.value === 'rtl',
        [`${groupPrefixCls}-${shape}`]: shape,
        [`${groupPrefixCls}-${shape}-shadow`]: !trigger,
      });

      const wrapperCls = classNames(hashId.value, `${groupPrefixCls}-wrap`);

      const transitionProps = getTransitionProps(`${groupPrefixCls}-wrap`);

      return wrapSSR(
        <div ref={floatButtonGroupRef} {...attrs} class={groupCls} {...hoverAction.value}>
          {trigger && ['click', 'hover'].includes(trigger) ? (
            <>
              <Transition {...transitionProps}>
                <div v-show={open.value} class={wrapperCls}>
                  {slots.default && slots.default()}
                </div>
              </Transition>
              <FloatButton
                ref={floatButtonRef}
                type={type}
                shape={shape}
                tooltip={tooltip}
                description={description}
                v-slots={{
                  icon: () =>
                    open.value
                      ? slots.closeIcon?.() || <CloseOutlined />
                      : slots.icon?.() || <FileTextOutlined />,
                  tooltip: slots.tooltip,
                  description: slots.description,
                }}
              ></FloatButton>
            </>
          ) : (
            slots.default?.()
          )}
        </div>,
      );
    };
  },
});

export default FloatButtonGroup;