import type { AuthService, Feature, RouteHandler, ServerContext } from "@stc/contracts";
import { createAuth } from "./auth";
import { runMigrations } from "./migrate";
import { json } from "./http";
import { adminRoutes } from "./admin";
import { libraryRoutes } from "./catalog";
import { lessonRoutes } from "./lesson";
import { userDataRoutes } from "./userdata";

/**
 * The learner feature: auth, library, reader, notes, progress and exercises.
 * Returns the routes plus the `AuthService` that replaces the server's anonymous one.
 */
export function learnerFeature(ctx: ServerContext): Feature & { auth: AuthService } {
  const ready = runMigrations(ctx.db);
  ready.catch((e) => console.error("[learner] migrations failed", e));
  const auth = createAuth(ctx, ready);
  const routes: Feature["routes"] = {
    "/api/auth/*": {
      GET: (req, rc) => auth.handler(req, rc.user),
      POST: (req, rc) => auth.handler(req, rc.user),
    },
    "/api/me": { GET: async (_req, rc) => json({ user: rc.user }) },
    "/api/learner/providers": {
      GET: async () => json({ emailPassword: true, providers: auth.providers(), sso: await auth.hasSso() }),
    },
    ...adminRoutes(ctx, auth.service.invalidate),
    ...libraryRoutes(ctx),
    ...lessonRoutes(ctx),
    ...userDataRoutes(ctx),
  };
  // Every handler waits for the learner migrations (a no-op once Phase 2 runs them in migrate()).
  for (const methods of Object.values(routes)) {
    for (const [m, h] of Object.entries(methods)) {
      (methods as Record<string, RouteHandler>)[m] = async (req, rc) => { await ready; return h!(req, rc); };
    }
  }
  return { name: "learner", routes, auth: auth.service };
}