import { StackActions, useNavigation } from '@react-navigation/native'
import { ConversationResource } from '../../types'
import { useMessageAvailableMembers } from './use_message_available_members'

export function useMessageAvailableMembersAction(conversation: ConversationResource) {
  const navigation = useNavigation()
  const isDmDisabled =
    !!conversation.disabled && conversation.disabledReason === 'direct_messages_disabled'
  const messageAvailableMembersLink = useMessageAvailableMembers(conversation, {
    enabled: isDmDisabled,
  })

  if (!messageAvailableMembersLink) return undefined

  return {
    label: messageAvailableMembersLink.label,
    onPress: () => {
      if ('existingConversationId' in messageAvailableMembersLink) {
        // replace instead of navigate/push so the disabled conversation isn't
        // left in the back stack as a dead end
        navigation.dispatch(
          StackActions.replace('Conversation', {
            conversation_id: messageAvailableMembersLink.existingConversationId,
          })
        )
      } else {
        navigation.navigate('New', {
          screen: 'ConversationSelectDirectMessageRecipients',
          params: { preselected_people: messageAvailableMembersLink.recipients },
        })
      }
    },
  }
}