"""Spawn feature config: paths, locks, rate limiting, projects watcher."""

import threading
from pathlib import Path

from amc_server.config import DATA_DIR

# Pending spawn registry
PENDING_SPAWNS_DIR = DATA_DIR / "pending_spawns"

# Pending spawn TTL: how long to keep unmatched spawn records (seconds)
PENDING_SPAWN_TTL = 60

# Projects directory for spawning agents
PROJECTS_DIR = Path.home() / 'projects'

# Lock for serializing spawn operations (prevents Zellij race conditions)
_spawn_lock = threading.Lock()

# Rate limiting: track last spawn time per project (prevents spam)
_spawn_timestamps: dict[str, float] = {}
SPAWN_COOLDOWN_SEC = 10.0


def start_projects_watcher():
    """Start background thread to refresh projects cache every 5 minutes."""
    import logging
    from amc_server.mixins.spawn import load_projects_cache

    def _watch_loop():
        import time
        while True:
            try:
                time.sleep(300)
                load_projects_cache()
            except Exception:
                logging.exception('Projects cache refresh failed')

    thread = threading.Thread(target=_watch_loop, daemon=True)
    thread.start()