#!/usr/bin/env python3
"""Backend for /aircontext-pause [on|off]."""
from __future__ import annotations
import os
import sys
from pathlib import Path

_HERE = Path(__file__).resolve().parent
sys.path.insert(0, str(_HERE))

from core.state import StateFile  # noqa: E402


def main() -> int:
    project = Path(os.environ.get("CLAUDE_PROJECT_DIR", os.getcwd()))
    air = project / "AirContext"
    if not air.exists():
        print("AirContext not initialised. Run /aircontext-init first.")
        return 1

    state = StateFile(air / "state.json")
    arg = (sys.argv[1].lower() if len(sys.argv) > 1 else "").strip()

    cur = bool(state.read().get("paused"))
    if arg in ("on", "pause", "true", "1"):
        new = True
    elif arg in ("off", "resume", "false", "0"):
        new = False
    else:
        new = not cur  # toggle

    state.update(paused=new)
    print(f"AirContext automatic compaction: {'PAUSED' if new else 'ACTIVE'}")
    return 0


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