"""Validatie en IP-toewijzing voor macvlan/ipvlan-netwerken."""
import sys
from pathlib import Path

import pytest

sys.path.insert(0, str(Path(__file__).resolve().parent.parent / "server-up"))

from core import networks

GELDIG = {"name": "lan", "driver": "macvlan", "parent": "eth0",
          "subnet": "192.168.1.0/24", "gateway": "192.168.1.1",
          "ip_range": "192.168.1.240/28"}


def test_geldige_definitie():
    assert networks.validate(GELDIG) == ""


@pytest.mark.parametrize("wijziging,fragment", [
    ({"name": "../boos"}, "netwerknaam"),
    ({"name": ""}, "netwerknaam"),
    ({"driver": "bridge"}, "macvlan"),
    ({"parent": "eth0; rm -rf /"}, "host-interface"),
    ({"subnet": "geen-subnet"}, "subnet"),
    ({"gateway": "10.9.9.1"}, "gateway ligt buiten"),
    ({"gateway": "nogal-fout"}, "gateway-adres"),
    ({"ip_range": "10.9.9.0/24"}, "range ligt buiten"),
    ({"ip_range": "onzin"}, "IP-range"),
])
def test_ongeldige_definities(wijziging, fragment):
    net = {**GELDIG, **wijziging}
    assert fragment in networks.validate(net)


def test_next_free_ip_respecteert_range_en_gateway(monkeypatch):
    monkeypatch.setattr(networks, "used_ips", lambda naam: set())
    # .240/28 loopt van .240 t/m .255; .240 is het netwerkadres, dus .241 eerst.
    assert networks.next_free_ip(GELDIG) == "192.168.1.241"


def test_next_free_ip_slaat_bezette_adressen_over(monkeypatch):
    monkeypatch.setattr(networks, "used_ips",
                        lambda naam: {"192.168.1.241", "192.168.1.242"})
    assert networks.next_free_ip(GELDIG) == "192.168.1.243"


def test_next_free_ip_houdt_rekening_met_reserveringen(monkeypatch):
    monkeypatch.setattr(networks, "used_ips", lambda naam: set())
    assert networks.next_free_ip(GELDIG, {"192.168.1.241"}) == "192.168.1.242"


def test_next_free_ip_zonder_range_gebruikt_subnet(monkeypatch):
    monkeypatch.setattr(networks, "used_ips", lambda naam: set())
    net = {**GELDIG, "ip_range": ""}
    assert networks.next_free_ip(net) == "192.168.1.2"   # .1 is de gateway


def test_next_free_ip_leeg_als_alles_bezet(monkeypatch):
    bezet = {f"192.168.1.{i}" for i in range(240, 256)}
    monkeypatch.setattr(networks, "used_ips", lambda naam: bezet)
    assert networks.next_free_ip(GELDIG) == ""


@pytest.mark.parametrize("ip,verwacht", [
    ("192.168.1.240", True),
    ("192.168.2.1", False),
    ("geen-ip", False),
])
def test_ip_in_network(ip, verwacht):
    assert networks.ip_in_network(ip, GELDIG) is verwacht


def test_remove_weigert_ongeldige_naam():
    ok, msg = networks.remove("../etc")
    assert ok is False
    assert "netwerknaam" in msg