"""
Test: Channel Not Saturated

Assert:
- utilization < 0.7

This verifies that the channel is not congested.
"""

import pytest
import random

from sim.main import run_simulation
from sim import config


@pytest.fixture
def seed():
    return 42


def test_channel_not_saturated(seed):
    """Test that channel utilization is below saturation threshold."""
    results = run_simulation(num_nodes=12, area_size=800, sim_time=200, seed=seed)

    metrics = results["metrics"]
    utilization = metrics.get("channel_utilization", 0)

    print(f"Channel utilization: {utilization}%")

    # Channel should not be saturated (< 70%)
    assert utilization < 70, f"Channel saturated: {utilization}%"


def test_channel_utilization_healthy_range(seed):
    """Test that channel utilization is in healthy range."""
    results = run_simulation(num_nodes=12, area_size=800, sim_time=200, seed=seed)

    metrics = results["metrics"]
    utilization = metrics.get("channel_utilization", 0)

    print(f"Channel utilization: {utilization}%")

    # Get network state
    if utilization < 30:
        state = "HEALTHY"
    elif utilization < 60:
        state = "ACCEPTABLE"
    else:
        state = "CONGESTED"

    print(f"Network state: {state}")

    # Just verify we can calculate it
    assert utilization >= 0


if __name__ == "__main__":
    pytest.main([__file__, "-v", "-s"])