import { spawn } from "node:child_process";
import { settings } from "./config.js";

function defaultRunner(command, args, options = {}) {
  return new Promise((resolve) => {
    const child = spawn(command, args, {
      stdio: ["pipe", "pipe", "pipe"],
      windowsHide: true,
    });
    let stdout = "";
    let stderr = "";
    child.stdout.on("data", (chunk) => {
      stdout += chunk.toString("utf8");
    });
    child.stderr.on("data", (chunk) => {
      stderr += chunk.toString("utf8");
    });
    child.on("error", (error) => {
      resolve({ status: 1, stdout, stderr: error.message });
    });
    child.on("close", (status) => {
      resolve({ status, stdout, stderr });
    });
    child.stdin.end(options.input || "");
  });
}

export function createWindowsHelper(options = {}) {
  const helperPath = options.helperPath || settings.windowsHelperPath;
  const command = options.command || "pwsh";
  const runner = options.runner || defaultRunner;
  return {
    async run(action, payload = {}) {
      const input = JSON.stringify({ action, payload });
      const result = await runner(
        command,
        ["-NoProfile", "-ExecutionPolicy", "Bypass", "-File", helperPath],
        { input },
      );
      if (result.status !== 0) {
        throw new Error(
          `Windows helper failed: ${(result.stderr || result.stdout || "helper exited without stderr").trim()}`,
        );
      }
      try {
        return JSON.parse(result.stdout);
      } catch {
        throw new Error(`Windows helper returned invalid JSON: ${result.stdout}`);
      }
    },
  };
}

export const windowsHelper = createWindowsHelper();