import { type } from "arktype";
import { readDropValidatedBody, throwingArktype } from "~/server/arktype";
import { defineClientEventHandler } from "~/server/internal/clients/event-handler";
import contextManager from "~/server/internal/downloads/coordinator";

const CreateContext = type({
  game: "string",
  version: "string",
}).configure(throwingArktype);

/**
 * Part of v2 download API. Create a download context for use with `/api/v2/client/chunk`.
 */
export default defineClientEventHandler<{ body: typeof CreateContext.infer }>(
  async (h3) => {
    const body = await readDropValidatedBody(h3, CreateContext);

    const context = await contextManager.createContext(body.game, body.version);
    if (!context)
      throw createError({
        statusCode: 400,
        statusMessage: "Invalid game or version",
      });

    return { context };
  },
);