import { describe, it, expect } from 'vitest';
import { createAnonClient } from './setup.ts';

const client = createAnonClient();

describe('Realtime', () => {
  it('should resume subscription from last_event_id', async () => {
    // 1. Create a message while no one is listening
    const { data: inserted, error } = await client
      .from('todos')
      .insert({ title: 'Missed Event', completed: false })
      .select()
      .single();
    expect(error).toBeNull();
    
    // We need to know the ID of this event in realtime history.
    // Ideally we query `madbase_realtime.messages` but client can't.
    // So we just assume ID > 0.
    // Wait, we need to pass `last_event_id` < actual_id.
    // Let's assume we want everything after ID=0.

    return new Promise<void>((resolve, reject) => {
      // 2. Connect with last_event_id = 0 (should fetch all history)
      const channel = client
        .channel('public:todos', { config: { last_event_id: 0 } as any })
        .on(
          'postgres_changes',
          { event: 'INSERT', schema: 'public', table: 'todos' },
          (payload) => {
            console.log('Received missed event:', payload);
            if (payload.new && payload.new.title === 'Missed Event') {
              expect(payload.new.id).toBe(inserted.id);
              client.removeChannel(channel).then(() => resolve());
            }
          }
        )
        .subscribe((status, err) => {
           if (status === 'SUBSCRIBED') {
             console.log('Subscribed with resume');
           }
           if (status === 'CHANNEL_ERROR') {
             reject(err);
           }
        });

      setTimeout(() => {
        reject(new Error('Timeout waiting for missed event'));
      }, 5000);
    });
  });
});