"""Tests for expanding discovery targets."""

from neotalk.core.entities.responses import ResponseTypes
from neotalk.core.use_cases.discovery.expand_targets import (
    expand_discovery_targets_use_case,
)


def test_empty_spec_gives_no_targets():
    # When the spec is blank
    response = expand_discovery_targets_use_case("  ")

    # Then there are no targets
    assert response["type"] == ResponseTypes.SUCCESS
    assert response["data"]["targets"] == []


def test_single_ip():
    # When a single IP is given
    response = expand_discovery_targets_use_case("10.0.200.151")

    # Then it is the only target
    assert response["data"]["targets"] == ["10.0.200.151"]


def test_subnet_expands_to_hosts():
    # When a small subnet is given
    response = expand_discovery_targets_use_case("192.168.0.0/30")

    # Then it expands to the usable hosts
    assert response["data"]["targets"] == ["192.168.0.1", "192.168.0.2"]


def test_mixed_and_deduplicated():
    # Given IPs and a subnet with an overlap, comma/space separated
    response = expand_discovery_targets_use_case("10.0.0.1, 192.168.0.0/30 192.168.0.1")

    # Then results are deduplicated, order preserved
    assert response["data"]["targets"] == [
        "10.0.0.1",
        "192.168.0.1",
        "192.168.0.2",
    ]


def test_invalid_address_is_rejected():
    # When the spec has garbage
    response = expand_discovery_targets_use_case("not-an-ip")

    # Then it is a parameters error
    assert response["type"] == ResponseTypes.PARAMETERS_ERROR
    assert response["errors"][0]["field"] == "discover"


def test_too_large_subnet_is_rejected():
    # When the subnet exceeds the cap
    response = expand_discovery_targets_use_case("10.0.0.0/16")

    # Then it is rejected
    assert response["type"] == ResponseTypes.PARAMETERS_ERROR