#!/usr/bin/env node
/**
 * Cross-platform: run a command with cwd set to a repo-relative directory.
 * Loads monorepo-root `.env` into the child env (does not override existing vars).
 * Usage: node scripts/run-in-dir.mjs <relDir> <command> [args...]
 */
import { spawn } from "node:child_process";
import fs from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
const [relDir, ...cmd] = process.argv.slice(2);

if (!relDir || cmd.length === 0) {
  console.error("Usage: node scripts/run-in-dir.mjs <relDir> <command> [args...]");
  process.exit(1);
}

function loadRootEnv(env) {
  const dotenvPath = process.env.DOTENV_PATH
    ? path.resolve(process.env.DOTENV_PATH)
    : path.join(root, ".env");
  let text;
  try {
    text = fs.readFileSync(dotenvPath, "utf8");
  } catch {
    return env;
  }
  const out = { ...env };
  for (const raw of text.split(/\r?\n/)) {
    let line = raw.trim();
    if (!line || line.startsWith("#")) continue;
    if (line.startsWith("export ")) line = line.slice(7).trim();
    const eq = line.indexOf("=");
    if (eq <= 0) continue;
    const key = line.slice(0, eq).trim();
    if (!key || Object.prototype.hasOwnProperty.call(out, key)) continue;
    let val = line.slice(eq + 1).trim();
    if (
      (val.startsWith('"') && val.endsWith('"')) ||
      (val.startsWith("'") && val.endsWith("'"))
    ) {
      val = val.slice(1, -1);
    }
    out[key] = val;
  }
  return out;
}

const cwd = path.join(root, relDir);
const [command, ...args] = cmd;
const child = spawn(command, args, {
  cwd,
  stdio: "inherit",
  shell: process.platform === "win32",
  env: loadRootEnv(process.env),
});

child.on("exit", (code, signal) => {
  if (signal) {
    process.kill(process.pid, signal);
    return;
  }
  process.exit(code ?? 1);
});