#!/usr/bin/env node

import readline from "node:readline";

const rl = readline.createInterface({ input: process.stdin });
const received = [];

function send(message) {
  process.stdout.write(`${JSON.stringify(message)}\n`);
}

rl.on("line", (line) => {
  const message = JSON.parse(line);
  received.push(message);

  if (message.method === "initialize") {
    send({
      id: message.id,
      result: {
        userAgent: "boss-test-codex-app-server",
        platformFamily: "mac",
        platformOs: "darwin",
      },
    });
    return;
  }

  if (message.method === "initialized") {
    return;
  }

  if (message.method === "thread/resume") {
    send({
      id: message.id,
      result: {
        thread: {
          id: message.params?.threadId ?? "thread-fixture",
          name: "fixture thread",
        },
      },
    });
    return;
  }

  if (message.method === "thread/start") {
    send({
      id: message.id,
      result: {
        thread: {
          id: "thread-started-fixture",
          name: "new fixture thread",
        },
      },
    });
    return;
  }

  if (message.method === "turn/start") {
    const text = message.params?.input?.find?.((item) => item?.type === "text")?.text ?? "";
    send({
      id: message.id,
      result: {
        turn: {
          id: "turn-fixture",
          threadId: message.params?.threadId,
        },
      },
    });
    if (process.env.BOSS_CODEX_APP_SERVER_FIXTURE_EXIT_AFTER_TURN_START === "1") {
      process.exit(0);
    }
    send({
      method: "item/agentMessage/delta",
      params: {
        threadId: message.params?.threadId,
        turnId: "turn-fixture",
        delta: `APP_SERVER_REPLY:${text}`,
      },
    });
    send({
      method: "turn/completed",
      params: {
        threadId: message.params?.threadId,
        turn: {
          id: "turn-fixture",
          status: "completed",
        },
      },
    });
    process.stderr.write(`${JSON.stringify({ received })}\n`);
    return;
  }

  send({
    id: message.id,
    error: {
      code: -32601,
      message: `unknown method ${message.method}`,
    },
  });
});