import type { ApplicationFeatureInputs } from "../application/ports/in/application-api.ts";
import { createReferenceFeatureInstalledInput } from "./reference-feature/adapters/create-reference-feature-input.ts";
import { REFERENCE_FEATURE_ID } from "./reference-feature/contracts/reference-feature-contract.ts";
import { createTechLogFeatureInstalledInput } from "./tech-log/adapters/create-tech-log-feature-input.ts";
import type { CsrfTokenProvider } from "./tech-log/adapters/http/studio-session-csrf.ts";
import { TECH_LOG_FEATURE_ID } from "./tech-log/application/tech-log-feature-input.ts";
import { INSTALLED_PRODUCT_FEATURE_IDS } from "./installed-product-manifest.ts";

/**
 * §3.5. Partial on purpose: a feature the manifest did not select supplies no
 * driving input, so consumers have to narrow before calling one. A total type
 * here would let feature code compile against an input that is not there.
 */
type InstalledFeatureInputs = Readonly<
  // Template merge. The reference feature is optional — the manifest may
  // narrow it out — so its input stays `Partial`. TechLog is this product's
  // own UI and is always installed, so its input is total.
  Partial<Pick<ApplicationFeatureInputs, typeof REFERENCE_FEATURE_ID>> &
    Pick<ApplicationFeatureInputs, typeof TECH_LOG_FEATURE_ID>
>;

export function createInstalledFeatureInputs(
  context: Parameters<typeof createReferenceFeatureInstalledInput>[0] &
    Readonly<{
      studioSource: "MOCK" | "HTTP";
      apiBaseUrl: string;
      requestTimeoutMs: number;
      csrf: CsrfTokenProvider;
    }>,
): InstalledFeatureInputs {
  const techLogFeature = createTechLogFeatureInstalledInput(context);
  if (!INSTALLED_PRODUCT_FEATURE_IDS.includes(REFERENCE_FEATURE_ID)) {
    // A build that narrowed the reference feature out still ships TechLog.
    return Object.freeze({
      [techLogFeature.featureId]: techLogFeature.input,
    }) as InstalledFeatureInputs;
  }
  const referenceFeature = createReferenceFeatureInstalledInput(context);
  return Object.freeze({
    [referenceFeature.featureId]: referenceFeature.input,
    [techLogFeature.featureId]: techLogFeature.input,
  }) as InstalledFeatureInputs;
}