"""
Test: Multihop Exists

Assert:
- max_hop >= 2

This verifies that multi-hop routing is actually being used.
"""

import pytest
import random

from sim.main import run_simulation
from sim import config


@pytest.fixture
def seed():
    return 42


def test_multihop_exists(seed):
    """Test that multi-hop routing is formed (hop >= 2)."""
    results = run_simulation(num_nodes=12, area_size=800, sim_time=200, seed=seed)

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

    print(f"Max hop: {max_hop}")
    print(f"Hop distribution: {metrics.get('hop_histogram', {})}")

    assert max_hop >= 2, f"Multi-hop not formed: max_hop={max_hop}"


def test_multihop_with_hop_histogram(seed):
    """Test hop distribution shows multiple hops."""
    results = run_simulation(num_nodes=12, area_size=800, sim_time=300, seed=seed)

    metrics = results["metrics"]
    hop_histogram = metrics.get("hop_histogram", {})

    print(f"Hop histogram: {hop_histogram}")

    # Should have at least 2 different hop counts
    assert len(hop_histogram) >= 1, "No hop distribution data"


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