import { afterEach, describe, expect, it } from "vitest";
import { WebSocketServer, type RawData } from "ws";
import { CodexAppServerClient } from "./client.js";

describe("Codex app-server websocket transport", () => {
  const clients: CodexAppServerClient[] = [];
  const servers: WebSocketServer[] = [];

  afterEach(async () => {
    for (const client of clients) {
      client.close();
    }
    clients.length = 0;
    await Promise.all(
      servers
        .splice(0)
        .map(
          (server) =>
            new Promise<void>((resolve, reject) =>
              server.close((error) => (error ? reject(error) : resolve())),
            ),
        ),
    );
  });

  it("can speak JSON-RPC over websocket transport", async () => {
    const server = new WebSocketServer({ host: "127.0.0.1", port: 0 });
    servers.push(server);
    const authHeaders: Array<string | undefined> = [];
    server.on("connection", (socket, request) => {
      authHeaders.push(request.headers.authorization);
      socket.on("message", (data) => {
        const message = JSON.parse(rawDataToText(data)) as { id?: number; method?: string };
        if (message.method === "initialize") {
          socket.send(
            JSON.stringify({ id: message.id, result: { userAgent: "openclaw/0.118.0" } }),
          );
          return;
        }
        if (message.method === "model/list") {
          socket.send(JSON.stringify({ id: message.id, result: { data: [] } }));
        }
      });
    });
    await new Promise<void>((resolve) => server.once("listening", resolve));
    const address = server.address();
    if (!address || typeof address === "string") {
      throw new Error("expected websocket test server port");
    }
    const client = CodexAppServerClient.start({
      transport: "websocket",
      url: `ws://127.0.0.1:${address.port}`,
      authToken: "secret",
    });
    clients.push(client);

    await expect(client.initialize()).resolves.toBeUndefined();
    await expect(client.request("model/list", {})).resolves.toEqual({ data: [] });
    expect(authHeaders).toEqual(["Bearer secret"]);
  });
});

function rawDataToText(data: RawData): string {
  if (Buffer.isBuffer(data)) {
    return data.toString("utf8");
  }
  if (Array.isArray(data)) {
    return Buffer.concat(data).toString("utf8");
  }
  return Buffer.from(data).toString("utf8");
}