import { createRef } from 'react';
import { NavigationContainerRef, CommonActions } from '@react-navigation/native';

// Shared ref — attach to <NavigationContainer ref={navigationRef}>
export const navigationRef =
  createRef<NavigationContainerRef<ReactNavigation.RootParamList>>();

// Queued leadId when app launches from a killed state (navigator not ready yet)
let pendingLeadId: string | null = null;

// Navigate to LeadDetails. If navigator isn't ready yet, queue it for onReady.
export function navigateToLeadDetails(leadId: string): void {
  if (!navigationRef.current?.isReady()) {
    pendingLeadId = leadId;
    return;
  }

  navigationRef.current.dispatch(
    CommonActions.navigate({
      name: 'DrawerStack',
      params: {
        screen: 'home',
        params: {
          screen: 'leads',
          params: {
            // Seed the LeadsStack with leadsList first so the back button
            // is always present when arriving from a notification.
            initial: false,
            screen: 'leadDetails',
            params: { lead: { id: leadId } },
          },
        },
      },
    }),
  );
}

// Call from NavigationContainer's onReady — executes any queued navigation
export function flushPendingNavigation(): void {
  if (pendingLeadId) {
    navigateToLeadDetails(pendingLeadId);
    pendingLeadId = null;
  }
}