import { useMemo } from 'react'
import { useAppGrants } from './use_chat_permissions'

export type NewConversationEntryMode =
  | 'select_type'
  | 'groups'
  | 'teams'
  | 'direct_message'
  | 'none'

export function useConversationTypeAccess() {
  const appGrants = useAppGrants()

  return useMemo(
    () => ({
      canCreateGroupsConversations: appGrants.data?.some(
        g => g.createConversations && g.appName === 'Groups'
      ),
      canCreateServicesConversations: appGrants.data?.some(
        g => g.createConversations && g.appName === 'Services'
      ),
      canCreateDirectMessages: appGrants.data?.some(
        g => g.createConversations && g.appName === 'Chat'
      ),
    }),
    [appGrants.data]
  )
}

export function useNewConversationEntry(): NewConversationEntryMode {
  const { canCreateGroupsConversations, canCreateServicesConversations, canCreateDirectMessages } =
    useConversationTypeAccess()

  return useMemo(() => {
    const availableCount = [
      canCreateGroupsConversations,
      canCreateServicesConversations,
      canCreateDirectMessages,
    ].filter(Boolean).length

    if (availableCount > 1) {
      return 'select_type'
    }

    if (canCreateGroupsConversations) {
      return 'groups'
    }

    if (canCreateServicesConversations) {
      return 'teams'
    }

    if (canCreateDirectMessages) {
      return 'direct_message'
    }

    return 'none'
  }, [canCreateGroupsConversations, canCreateServicesConversations, canCreateDirectMessages])
}