import { mkdtemp, writeFile, chmod } from 'node:fs/promises';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { spawn } from 'node:child_process';
import { dirname } from 'node:path';
import { fileURLToPath } from 'node:url';

async function run() {
  const dir = await mkdtemp(join(tmpdir(), 'pi-subagents-wrapper-'));
  const metaPath = join(dir, 'meta.json');
  const resultPath = join(dir, 'result.json');
  const capturePath = join(dir, 'capture.json');
  const piPath = join(dir, 'pi');

  await writeFile(piPath, `#!${process.execPath}\nconst fs = require('fs');\nconst capturePath = ${JSON.stringify(capturePath)};\nconst obj = { PI_SUBAGENTS_GITHUB_COPILOT_INITIATOR: process.env.PI_SUBAGENTS_GITHUB_COPILOT_INITIATOR || '', PI_SUBAGENTS_CHILD: process.env.PI_SUBAGENTS_CHILD || '', argv: process.argv.slice(2) }; fs.writeFileSync(capturePath, JSON.stringify(obj), 'utf8'); console.log(JSON.stringify({type:'message_end',message:{role:'assistant',content:[{type:'text',text:'done'}],model:'github-copilot/gpt-4o',stopReason:'stop'}}));`, 'utf8');
  await chmod(piPath, 0o755);

  const meta = {
    runId: 'run-1',
    mode: 'single',
    task: 'inspect auth',
    cwd: dir,
    requestedModel: 'github-copilot/gpt-4o',
    resolvedModel: 'github-copilot/gpt-4o',
    startedAt: '2026-04-09T00:00:00.000Z',
    sessionPath: join(dir, 'child-session.jsonl'),
    eventsPath: join(dir, 'events.jsonl'),
    resultPath,
    stdoutPath: join(dir, 'stdout.log'),
    stderrPath: join(dir, 'stderr.log'),
    transcriptPath: join(dir, 'transcript.log'),
    tools: ['read', 'grep'],
    systemPromptPath: join(dir, 'system-prompt.md'),
  };

  await writeFile(metaPath, JSON.stringify(meta, null, 2), 'utf8');

  const wrapperPath = join(dirname(fileURLToPath(import.meta.url)), 'src/wrapper/cli.mjs');
  console.log('wrapperPath', wrapperPath, 'metaPath', metaPath);
  const child = spawn(process.execPath, [wrapperPath, metaPath], { env: { ...process.env, PATH: dir }, stdio: ['ignore','pipe','pipe'] });

  child.stdout.on('data', (c) => console.log('wrapper stdout:', c.toString()));
  child.stderr.on('data', (c) => console.error('wrapper stderr:', c.toString()));

  child.on('close', (code) => { console.log('wrapper exited', code); process.exit(code ?? 0); });
}

run().catch(err => { console.error(err); process.exit(1); });