import { CommandError, NOT_FOUND_CODES, type CommandName, type GameEngine } from "@deadhead/engine";
import type { RouteName } from "@deadhead/schema";
import { ApiError, type ApiClient } from "./client";

/** The HTTP status the server sent for a code, so screens read refusals as before. */
function statusFor(code: CommandError["code"]): number {
  if (code === "validation-error") return 400;
  if (code === "unauthorized") return 401;
  return NOT_FOUND_CODES.has(code) ? 404 : 409;
}

/**
 * The typed client over the engine instead of HTTP (CR-014 Step 14.7): the
 * same catalog names, inputs and outputs, and refusals as the same `ApiError`s.
 */
export function createEngineClient(engine: GameEngine): ApiClient {
  let prompt: Promise<void> = Promise.resolve();
  return {
    async call(name, input) {
      try {
        const result = await engine.call(name as RouteName as CommandName, input as never);
        // Notifications are asked for once the player owns the business (decision 0.5.91).
        if (name === "acceptDeal") prompt = engine.requestNotificationPermission().catch(() => {});
        return result as never;
      } catch (error) {
        if (error instanceof CommandError) {
          throw new ApiError(statusFor(error.code), error.code, error.message);
        }
        throw error;
      }
    },
    notificationPrompt: () => prompt,
  };
}