"""Trigger a rebuild of the (paused) eval-gpu Space image and poll status.

Usage: python _rebuild_space.py [--pause-when-done]
Reads HF_TOKEN from ../cadgenbench/.env.
"""
from __future__ import annotations

import argparse
import os
import sys
import time
from pathlib import Path

SID = "HuggingAI4Engineering/cadgenbench-eval-gpu"


def _load_token() -> str:
    # Prefer an explicitly-provided token (e.g. pulled from git's credential
    # helper, which has write on the Space) over the .env jobs-hf PAT, which
    # is read-only on this Space and 403s on restart_space.
    explicit = os.environ.get("HF_REBUILD_TOKEN")
    if explicit:
        return explicit.strip()
    env = Path(__file__).resolve().parent.parent / "cadgenbench" / ".env"
    for line in env.read_text().splitlines():
        if line.startswith("HF_TOKEN="):
            return line.split("=", 1)[1].strip()
    raise SystemExit("HF_TOKEN not found in .env")


def main() -> int:
    ap = argparse.ArgumentParser()
    ap.add_argument("--pause-when-done", action="store_true")
    ap.add_argument("--timeout", type=float, default=900.0)
    args = ap.parse_args()

    from huggingface_hub import HfApi

    api = HfApi(token=_load_token())
    print(f"[rebuild] restart_space({SID})", flush=True)
    api.restart_space(SID)

    t0 = time.monotonic()
    last = None
    terminal_ok = {"RUNNING", "RUNNING_APP_STARTING", "APP_STARTING"}
    terminal_bad = {"BUILD_ERROR", "RUNTIME_ERROR", "CONFIG_ERROR"}
    while time.monotonic() - t0 < args.timeout:
        rt = api.get_space_runtime(SID)
        stage = rt.stage
        if stage != last:
            print(f"[rebuild] {time.monotonic() - t0:6.0f}s stage={stage}", flush=True)
            last = stage
        if stage in terminal_ok:
            print(f"[rebuild] BUILD OK (stage={stage})", flush=True)
            if args.pause_when_done:
                print("[rebuild] pausing space", flush=True)
                api.pause_space(SID)
                print("[rebuild] paused", flush=True)
            return 0
        if stage in terminal_bad:
            print(f"[rebuild] BUILD FAILED (stage={stage})", flush=True)
            return 1
        time.sleep(15)
    print("[rebuild] TIMEOUT waiting for build", flush=True)
    return 2


if __name__ == "__main__":
    sys.exit(main())