#!/usr/bin/env python3
from __future__ import annotations

import argparse
import os
import shlex
import subprocess
from pathlib import Path


def _secret(name: str) -> str:
    value = os.environ.get(name)
    if value:
        return value
    path = Path('.env') / name
    if path.is_file():
        value = path.read_text().strip()
        if value:
            return value
    raise RuntimeError(f'{name} is required')


def main() -> int:
    parser = argparse.ArgumentParser(description='Run an aggressive sweep node directly over SSH, outside Sky/Ray job workers.')
    parser.add_argument('--host', required=True)
    parser.add_argument('--port', required=True)
    parser.add_argument('--node', required=True)
    parser.add_argument('--jobs', required=True)
    parser.add_argument('--artifact-dir', default='artifacts/current_run')
    parser.add_argument('--utilization', required=True)
    parser.add_argument('--remote-root', default='/root/sky_workdir')
    parser.add_argument('--max-jobs', type=int)
    parser.add_argument('--sample-interval-seconds', type=float, default=30.0)
    parser.add_argument('--stale-after-seconds', type=float, default=21600.0)
    parser.add_argument('--max-attempts', type=int, default=2)
    args = parser.parse_args()

    hf_token = _secret('HF_TOKEN')
    wandb_api_key = _secret('WANDB_API_KEY')
    parts = [
        'uv run --no-dev python scripts/aggressive_oom_node_wrapper.py',
        f'--jobs {shlex.quote(args.jobs)}',
        f'--node {shlex.quote(args.node)}',
        f'--artifact-dir {shlex.quote(args.artifact_dir)}',
        f'--utilization {shlex.quote(args.utilization)}',
        f'--sample-interval-seconds {args.sample_interval_seconds:g}',
        f'--stale-after-seconds {args.stale_after_seconds:g}',
        f'--max-attempts {args.max_attempts}',
    ]
    if args.max_jobs is not None:
        parts.append(f'--max-jobs {args.max_jobs}')
    remote_cmd = ' '.join(parts)
    remote_script = '\n'.join(
        [
            'set -euo pipefail',
            f'cd {shlex.quote(args.remote_root)}',
            f'export HF_TOKEN={shlex.quote(hf_token)}',
            f'export WANDB_API_KEY={shlex.quote(wandb_api_key)}',
            'export PATH=\"$HOME/.local/bin:/root/.local/bin:$PATH\"',
            'export PYTHONUNBUFFERED=1',
            remote_cmd,
            '',
        ]
    )
    command = [
        'ssh',
        '-o',
        'StrictHostKeyChecking=no',
        '-p',
        str(args.port),
        f'root@{args.host}',
        'bash',
        '-s',
    ]
    print(f'sweep_direct_host={args.host}', flush=True)
    print(f'sweep_direct_port={args.port}', flush=True)
    print(f'sweep_direct_node={args.node}', flush=True)
    print('sweep_direct_command=<redacted secrets> uv run --no-dev python scripts/aggressive_oom_node_wrapper.py', flush=True)
    return subprocess.run(command, input=remote_script, text=True, check=False).returncode


if __name__ == '__main__':
    raise SystemExit(main())