import {HTTPKernelModule} from "../HTTPKernelModule";
import {Injectable} from "../../../di"
import {ErrorWithContext} from "../../../util"
import {HTTPKernel} from "../HTTPKernel";
import {Request} from "../../lifecycle/Request";
import {SetSessionCookieHTTPModule} from "./SetSessionCookieHTTPModule";
import {SessionFactory} from "../../session/SessionFactory";
import {Session} from "../../session/Session";

/**
 * HTTP kernel middleware that creates the session using the configured driver
 * and loads its data using the request's session cookie.
 */
@Injectable()
export class InjectSessionHTTPModule extends HTTPKernelModule {
    public readonly executeWithBlockingWriteback = true

    public static register(kernel: HTTPKernel) {
        kernel.register(this).after(SetSessionCookieHTTPModule)
    }

    public async apply(request: Request) {
        request.registerFactory(new SessionFactory())

        const session = <Session> request.make(Session)
        const id = request.cookies.get('extollo.session')
        if ( !id ) {
            throw new ErrorWithContext('Session ID has not been set. Cannot inject session!')
        }

        session.setKey(id.value)
        await session.load()

        return request
    }
}