import {Collection, ErrorWithContext} from "@extollo/util"
import {AppClass} from "../../lifecycle/AppClass"
import {RouteHandler} from "./Route"
import {Container} from "@extollo/di"
import {Logging} from "../../service/Logging";

export class RouteGroup extends AppClass {
    private static currentGroupNesting: RouteGroup[] = []

    protected static namedGroups: {[key: string]: () => void } = {}

    protected middlewares: Collection<{ stage: 'pre' | 'post', handler: RouteHandler }> = new Collection<{stage: "pre" | "post"; handler: RouteHandler}>()

    public static getCurrentGroupHierarchy(): RouteGroup[] {
        return [...this.currentGroupNesting]
    }

    public static named(name: string, define: () => void) {
        if ( this.namedGroups[name] ) {
            Container.getContainer()
                .make<Logging>(Logging)
                .warn(`Replacing named route group: ${name}`)
        }

        this.namedGroups[name] = define
    }

    public static include(name: string) {
        if (!this.namedGroups[name]) {
            throw new ErrorWithContext(`No route group exists with name: ${name}`, {name})
        }

        this.namedGroups[name]()
    }


    constructor(
        public readonly group: () => void | Promise<void>,
        public readonly prefix: string
    ) { super() }

    pre(middleware: RouteHandler) {
        this.middlewares.push({
            stage: 'pre',
            handler: middleware
        })

        return this
    }

    post(middleware: RouteHandler) {
        this.middlewares.push({
            stage: 'post',
            handler: middleware,
        })

        return this
    }

    getGroupMiddlewareDefinitions() {
        return this.middlewares
    }
}