import { combineLatest, Observable } from "rxjs"
import { map } from "rxjs/operators"
import { HoppRESTRequest } from "../types/HoppRESTRequest"
import { Environment } from "~/newstore/environments"

export interface EffectiveHoppRESTRequest extends HoppRESTRequest {
  /**
   * The effective final URL.
   *
   * This contains path, params and environment variables all applied to it
   */
  effectiveFinalURL: string
  effectiveFinalHeaders: { key: string; value: string }[]
  effectiveFinalParams: { key: string; value: string }[]
}

/**
 * Outputs an executable request format with environment variables applied
 *
 * @param request The request to source from
 * @param environment The environment to apply
 *
 * @returns An object with extra fields defining a complete request
 */
export function getEffectiveRESTRequest(
  request: HoppRESTRequest,
  _environment: Environment
): EffectiveHoppRESTRequest {
  // TODO: Change this
  return {
    ...request,
    effectiveFinalURL: request.endpoint,
    effectiveFinalHeaders: request.headers.filter(
      (x) =>
        x.key !== "" && // Remove empty keys
        x.active // Only active
    ),
    effectiveFinalParams: request.params.filter(
      (x) =>
        x.key !== "" && // Remove empty keys
        x.active // Only active
    ),
  }
}

/**
 * Creates an Observable Stream that emits HoppRESTRequests whenever
 * the input streams emit a value
 *
 * @param request$ The request stream containing request data
 * @param environment$ The environment stream containing environment data to apply
 *
 * @returns Observable Stream for the Effective Request Object
 */
export function getEffectiveRESTRequestStream(
  request$: Observable<HoppRESTRequest>,
  environment$: Observable<Environment>
): Observable<EffectiveHoppRESTRequest> {
  return combineLatest([request$, environment$]).pipe(
    map(([request, env]) => getEffectiveRESTRequest(request, env))
  )
}