import pytest

from ingestor.config import GatewayConfig

_ENV_VARS = (
    'NATS_URL',
    'NATS_WRITE_SUBJECT',
    'NATS_QUEUE',
    'GRPC_ENABLED',
    'GRPC_PORT',
    'CERT_BUCKET',
    'CERT_CACHE_DIR',
    'WRITE_TIMESTAMP',
    'WRITE_QUALITY',
    'WRITE_MIN_PAUSE_S',
    'IDLE_CONN_MAX_S',
)


@pytest.fixture(autouse=True)
def clean_env(monkeypatch):
    for var in _ENV_VARS:
        monkeypatch.delenv(var, raising=False)


def test_from_env_defaults():
    cfg = GatewayConfig.from_env()

    assert cfg.nats_url == 'nats://localhost:4222'
    assert cfg.nats_write_subject == 'opc.write'
    assert cfg.nats_queue == 'gateway-writers'
    assert cfg.grpc_enabled is False
    assert cfg.grpc_port == 50051
    assert cfg.cert_bucket == 'streamlit-connectors'
    assert cfg.cert_cache_dir == '/tmp/opc-certs'  # noqa: S108
    assert cfg.write_timestamp is True
    assert cfg.write_quality is True
    assert cfg.write_min_pause_s == 0.0
    assert cfg.idle_conn_max_s == 300.0


def test_from_env_overrides(monkeypatch):
    monkeypatch.setenv('GRPC_ENABLED', 'true')
    monkeypatch.setenv('GRPC_PORT', '6000')
    monkeypatch.setenv('WRITE_MIN_PAUSE_S', '0.5')
    monkeypatch.setenv('WRITE_QUALITY', 'false')

    cfg = GatewayConfig.from_env()

    assert cfg.grpc_enabled is True
    assert cfg.grpc_port == 6000
    assert cfg.write_min_pause_s == 0.5
    assert cfg.write_quality is False


@pytest.mark.parametrize(
    'value,expected',
    [
        ('0', False),
        ('no', False),
        ('FALSE', False),
        ('1', True),
        ('YES', True),
    ],
)
def test_bool_parsing_edge_cases(monkeypatch, value, expected):
    monkeypatch.setenv('GRPC_ENABLED', value)

    cfg = GatewayConfig.from_env()

    assert cfg.grpc_enabled is expected