import type { FastifyPluginAsync } from 'fastify'
import type { Type } from 'typebox'
import type { UserSchema } from '../schemas/auth.ts'
import type { ChatMessageSchema } from '../schemas/chat.ts'
import { EventEmitter } from 'node:events'
import fp from 'fastify-plugin'

declare module 'fastify' {
  interface FastifyInstance {
    bus: EventEmitter
  }
}

interface EventMap {
  'chat:new-message': [Type.Static<typeof ChatMessageSchema>]
  'user:profile-updated': [Type.Static<typeof UserSchema>]
}

const plugin: FastifyPluginAsync = fp(async (fastify) => {
  const bus = new EventEmitter<EventMap>()

  fastify.decorate('bus', bus)
}, {
  name: 'event-bus',
})

export default plugin