import { Transition, computed, defineComponent, ref, watch } from 'vue'

import SubMenuList from './SubMenuList'
import { MenuContextProvider, useInjectMenu } from './hooks/useMenuContext'
import type { MenuMode } from './interface'

export default defineComponent({
  compatConfig: { MODE: 3 },
  name: 'InlineSubMenuList',
  inheritAttrs: false,
  props: {
    id: String,
    open: Boolean,
    keyPath: Array,
  },
  setup(props, { slots }) {
    const fixedMode = computed<MenuMode>(() => 'inline')
    const { motion, mode, defaultMotions } = useInjectMenu()
    const sameModeRef = computed(() => mode.value === fixedMode.value)
    const destroy = ref(!sameModeRef.value)

    const mergedOpen = computed(() => (sameModeRef.value ? props.open : false))

    // ================================= Effect =================================
    // Reset destroy state when mode change back
    watch(
      mode,
      () => {
        if (sameModeRef.value) {
          destroy.value = false
        }
      },
      { flush: 'post' },
    )
    const mergedMotion = computed(() => {
      const m =
        motion.value || defaultMotions.value?.[fixedMode.value] || defaultMotions.value?.other
      const res = typeof m === 'function' ? m() : m
      return { ...res, appear: props.keyPath.length <= 1 }
    })
    return () => {
      if (destroy.value) {
        return null
      }
      return (
        <MenuContextProvider mode={fixedMode.value}>
          <Transition {...mergedMotion.value}>
            <SubMenuList v-show={mergedOpen.value} id={props.id}>
              {slots.default?.()}
            </SubMenuList>
          </Transition>
        </MenuContextProvider>
      )
    }
  },
})
