import {HTTPKernelModule} from '../HTTPKernelModule'
import {Inject, Injectable} from '../../../di'
import {HTTPKernel} from '../HTTPKernel'
import {Request} from '../../lifecycle/Request'
import {Bus} from '../../../support/bus'

/**
 * HTTP kernel module that creates a request-specific event bus
 * and injects it into the request container.
 */
@Injectable()
export class InjectRequestEventBusHTTPModule extends HTTPKernelModule {
    @Inject()
    protected bus!: Bus

    public static register(kernel: HTTPKernel): void {
        kernel.register(this).first()
    }

    public async apply(request: Request): Promise<Request> {
        const requestBus = this.container().makeNew<Bus>(Bus)
        await requestBus.up(false)
        await requestBus.connect(this.bus)

        request.purge(Bus).registerProducer(Bus, () => requestBus)
        return request
    }
}