#!/usr/bin/env node

// Ensures CLI startup benchmark assets are built before checks.
import { spawnSync } from "node:child_process";
import { existsSync } from "node:fs";
import path from "node:path";
import { fileURLToPath, pathToFileURL } from "node:url";

const repoRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const entryCandidates = ["dist/entry.js", "dist/entry.mjs"];
const startupMetadataPath = "dist/cli-startup-metadata.json";
const DEFAULT_BUILD_TIMEOUT_MS = 10 * 60 * 1000;

function positiveEnvInt(name, env, fallback) {
  const raw = env[name]?.trim();
  if (raw === undefined || raw === "") {
    return fallback;
  }
  if (!/^[1-9]\d*$/.test(raw)) {
    throw new Error(`invalid ${name}: ${raw}`);
  }
  const value = Number(raw);
  if (!Number.isSafeInteger(value)) {
    throw new Error(`invalid ${name}: ${raw}`);
  }
  return value;
}

/**
 * Resolves the CLI startup build timeout from environment.
 */
export function resolveCliStartupBuildTimeoutMs(env = process.env) {
  return positiveEnvInt("OPENCLAW_CLI_STARTUP_BUILD_TIMEOUT_MS", env, DEFAULT_BUILD_TIMEOUT_MS);
}

/**
 * Reports whether required CLI startup build outputs exist.
 */
export function hasCliStartupBuild(params = {}) {
  const rootDir = params.rootDir ?? repoRoot;
  const exists = params.existsSync ?? existsSync;
  const hasEntry = entryCandidates.some((relativePath) => exists(path.join(rootDir, relativePath)));
  return hasEntry && exists(path.join(rootDir, startupMetadataPath));
}

/**
 * Builds CLI startup assets when required outputs are missing.
 */
export function ensureCliStartupBuild(params = {}) {
  const rootDir = params.rootDir ?? repoRoot;
  if (hasCliStartupBuild({ rootDir, existsSync: params.existsSync })) {
    return { built: false };
  }

  const nodeExecPath = params.nodeExecPath ?? process.execPath;
  const spawn = params.spawnSync ?? spawnSync;
  const buildScript = path.join(rootDir, "scripts", "build-all.mjs");

  console.error(
    "[cli-startup-build] dist startup entry or metadata missing; running cliStartup build profile",
  );
  const result = spawn(nodeExecPath, [buildScript, "cliStartup"], {
    cwd: rootDir,
    env: params.env ?? process.env,
    killSignal: params.killSignal ?? "SIGKILL",
    stdio: params.stdio ?? "inherit",
    timeout: params.timeoutMs ?? resolveCliStartupBuildTimeoutMs(params.env ?? process.env),
  });
  if (result.error) {
    throw result.error;
  }
  const status = result.status ?? (result.signal ? 1 : 0);
  if (status !== 0) {
    throw new Error(`cliStartup build profile failed with exit code ${status}`);
  }
  return { built: true };
}

if (process.argv[1] && import.meta.url === pathToFileURL(process.argv[1]).href) {
  try {
    ensureCliStartupBuild();
  } catch (error) {
    console.error(error instanceof Error ? error.message : String(error));
    process.exit(1);
  }
}