import { spawn } from "node:child_process";
import path from "node:path";
import { fileURLToPath } from "node:url";
import type { OpenClawPluginApi } from "openclaw/plugin-sdk";

const _G = globalThis as Record<string, unknown>;
const LIFECYCLE_KEY = "_contractorProbeLifecycleRegistered";
const SIDECAR_KEY = "_contractorProbeSidecarProcess";

const __dirname = path.dirname(fileURLToPath(import.meta.url));

function startSidecar(logger: OpenClawPluginApi["logger"]): void {
  const serverPath = path.join(__dirname, "server.mjs");
  const child = spawn(process.execPath, [serverPath], {
    env: { ...process.env, PROBE_PORT: "8799" },
    stdio: ["ignore", "pipe", "pipe"],
    detached: false,
  });

  child.stdout?.on("data", (d: Buffer) =>
    logger.info(`[contractor-probe-sidecar] ${d.toString().trim()}`)
  );
  child.stderr?.on("data", (d: Buffer) =>
    logger.warn(`[contractor-probe-sidecar] ${d.toString().trim()}`)
  );
  child.on("exit", (code: number | null) =>
    logger.info(`[contractor-probe-sidecar] exited code=${code}`)
  );

  _G[SIDECAR_KEY] = child;
  logger.info("[contractor-probe] sidecar started");
}

function stopSidecar(logger: OpenClawPluginApi["logger"]): void {
  const child = _G[SIDECAR_KEY] as import("node:child_process").ChildProcess | undefined;
  if (child && !child.killed) {
    child.kill("SIGTERM");
    logger.info("[contractor-probe] sidecar stopped");
  }
}

export default {
  id: "contractor-probe",
  name: "Contractor Probe",
  register(api: OpenClawPluginApi) {
    if (!_G[LIFECYCLE_KEY]) {
      _G[LIFECYCLE_KEY] = true;
      startSidecar(api.logger);
      api.on("gateway_stop", () => stopSidecar(api.logger));
    }

    api.logger.info("[contractor-probe] plugin registered");
  },
};