#!/usr/bin/env python3
"""
Shared code for config validator examples.
"""

import pickle
from pathlib import Path

# The set of all valid (rule_id, event_type) pairs we'll encounter
RULES = range(20)       # 0-19 (small, bounded input space)
EVENT_TYPES = range(20) # 0-19

EVENTS_FILE = Path(__file__).parent / "events.pkl"


def validate_rule_slow(rule_id, event_type):
    """
    Simulate an expensive validation check.
    In real life, this might query a database, parse XML, etc.
    """
    total = 0
    for i in range(50):
        total += (rule_id * event_type * i) % 997
    return total % 2 == 0


def load_events():
    """Load events from the pickle file."""
    if not EVENTS_FILE.exists():
        raise FileNotFoundError(
            f"Events file not found: {EVENTS_FILE}\n"
            "Run 'python3 generate_events.py' first."
        )
    with open(EVENTS_FILE, "rb") as f:
        return pickle.load(f)