from redis_super_storage import RedisSuperStorage
from communicators import ConsumerCommunicator, ProducerCommunicator
from ip_watchdog import IPWatchdog
import pytest
import redis
import json
import socket

REDIS_URL = "redis://localhost/0"
REDIS_TIMEOUT = 2

CURRENT_HOSTNAME = "testenv.local"
CURRENT_IPADDR = "192.168.1.50"


@pytest.fixture
def redis_super_storage_instance(mocker):
    mocker.patch("redis.from_url")
    yield RedisSuperStorage(REDIS_URL, REDIS_TIMEOUT)


@pytest.fixture
def ip_watchdog_instance(mocker, redis_super_storage_instance):
    mocker.patch("socket.gethostname", side_effect=lambda: CURRENT_HOSTNAME)
    mocker.patch("socket.gethostbyname", side_effect=lambda a: CURRENT_IPADDR)
    yield IPWatchdog(redis_super_storage_instance)


# ========================================
# RedisSuperStorage
# ========================================

# __init__

def test_rst_instance_creation(mocker):
    mocker.patch("redis.from_url")
    rst = RedisSuperStorage("test", 2)

    redis.from_url.assert_called_once_with("test")
    assert rst._timeout == 2


# ip get/set

def test_rst_ip_getter_get_none(redis_super_storage_instance):
    redis_super_storage_instance.r.get.side_effect = lambda a: None

    ip = redis_super_storage_instance.current_ip

    assert ip is None
    redis_super_storage_instance.r.get.assert_called_once_with('current_ip')


def test_rst_ip_getter_get_ip(redis_super_storage_instance):
    redis_super_storage_instance.r.get.side_effect = lambda a: b"127.0.0.1"

    ip = redis_super_storage_instance.current_ip

    assert ip == "127.0.0.1"
    redis_super_storage_instance.r.get.assert_called_once_with('current_ip')


def test_rst_ip_getter_set_ip(redis_super_storage_instance):
    redis_super_storage_instance.current_ip = "127.0.0.1"
    redis_super_storage_instance.r.set.assert_called_once_with('current_ip', b"127.0.0.1")


# update consumer

def test_rst_update_consumer(mocker, redis_super_storage_instance):
    mocker.patch("time.time", side_effect=lambda: 123)
    redis_super_storage_instance.update_consumer("testuuid", "127.0.0.1")

    cust_key = "consumer_testuuid"

    info = {
        "uuid": "testuuid",
        "ip": "127.0.0.1",
        "last_seen": 123
    }

    redis_super_storage_instance.r.set.assert_called_once_with(cust_key, json.dumps(info).encode('utf-8'))
    redis_super_storage_instance.r.expire.assert_called_once_with(cust_key, REDIS_TIMEOUT)


# producer list

def test_rst_get_producer_list(redis_super_storage_instance):
    redis_super_storage_instance.r.keys.side_effect = lambda a: [
        b"producer_uuid1",
        b"producer_uuid2",
        b"producer_uuid3"
    ]

    data = {
        b"producer_uuid1": b"127.0.0.1",
        b"producer_uuid2": b"127.0.0.2",
        b"producer_uuid3": b"127.0.0.3",
    }

    redis_super_storage_instance.r.get.side_effect = lambda a: data[a]

    lst = redis_super_storage_instance.get_producer_list()

    assert lst == {
        "producer_uuid1": "127.0.0.1",
        "producer_uuid2": "127.0.0.2",
        "producer_uuid3": "127.0.0.3",
    }

    redis_super_storage_instance.r.keys.assert_called_once_with("producer_*")


def test_rst_get_producer_expire_while_get(redis_super_storage_instance):
    redis_super_storage_instance.r.keys.side_effect = lambda a: [b"producer_uuid1"]
    redis_super_storage_instance.r.get.side_effect = lambda a: None

    lst = redis_super_storage_instance.get_producer_list()

    assert isinstance(lst, dict)
    assert lst == {}

    redis_super_storage_instance.r.keys.assert_called_once_with("producer_*")


# get_consumer_list

def test_rst_get_consumer_list(redis_super_storage_instance):
    redis_super_storage_instance.r.keys.side_effect = lambda a: [
        b"consumer_uuid1",
        b"consumer_uuid2",
        b"consumer_uuid3"
    ]

    data = {
        b"consumer_uuid1": json.dumps({
            "uuid": "consumer_uuid1",
            "ip": "127.0.0.1",
            "last_seen": 123
        }).encode("utf-8"),
        b"consumer_uuid2": json.dumps({
            "uuid": "consumer_uuid2",
            "ip": "127.0.0.2",
            "last_seen": 1234
        }).encode("utf-8"),
        b"consumer_uuid3": json.dumps({
            "uuid": "consumer_uuid3",
            "ip": "127.0.0.3",
            "last_seen": 1235
        }).encode("utf-8")
    }

    redis_super_storage_instance.r.get.side_effect = lambda a: data[a]

    lst = redis_super_storage_instance.get_consumer_list()

    assert lst == {
        "consumer_uuid1": {
            "uuid": "consumer_uuid1",
            "ip": "127.0.0.1",
            "last_seen": 123
        },
        "consumer_uuid2": {
            "uuid": "consumer_uuid2",
            "ip": "127.0.0.2",
            "last_seen": 1234
        },
        "consumer_uuid3": {
            "uuid": "consumer_uuid3",
            "ip": "127.0.0.3",
            "last_seen": 1235
        }
    }

    redis_super_storage_instance.r.keys.assert_called_once_with("consumer_*")
    assert redis_super_storage_instance.r.get.call_count == 3


def test_rst_get_consumer_list_expire_while_get(redis_super_storage_instance):
    redis_super_storage_instance.r.keys.side_effect = lambda a: [b"consumer_uuid1"]
    redis_super_storage_instance.r.get.side_effect = lambda a: None

    lst = redis_super_storage_instance.get_consumer_list()

    assert isinstance(lst, dict)
    assert lst == {}

    redis_super_storage_instance.r.keys.assert_called_once_with("consumer_*")
    redis_super_storage_instance.r.get.assert_called_once_with(b"consumer_uuid1")


# ========================================
# IPWatchdog
# ========================================

# __init__

def test_ipw_instantiate(mocker, redis_super_storage_instance):
    mocker.patch("socket.gethostname", side_effect=lambda: "test")
    ipw = IPWatchdog(redis_super_storage_instance)

    assert ipw._host_name == "test"
    assert ipw._redis_store == redis_super_storage_instance
    socket.gethostname.assert_called_once()


def test_ipw_is_changed_false(mocker, ip_watchdog_instance):
    ip_watchdog_instance._redis_store.r.get.side_effect = lambda a: CURRENT_IPADDR.encode("utf-8")

    changed, ip = ip_watchdog_instance.ip_changed()

    assert not changed
    assert ip == CURRENT_IPADDR

    ip_watchdog_instance._redis_store.r.get.assert_called_once_with("current_ip")
    assert not ip_watchdog_instance._redis_store.r.set.called
    socket.gethostbyname.assert_called_once_with(CURRENT_HOSTNAME)


def test_ipw_is_changed_true(mocker, ip_watchdog_instance):
    mocker.patch("socket.gethostbyname", side_effect=lambda a: "192.168.2.123")
    ip_watchdog_instance._redis_store.r.get.side_effect = lambda a: CURRENT_IPADDR.encode("utf-8")

    changed, ip = ip_watchdog_instance.ip_changed()

    assert changed
    assert ip == "192.168.2.123"

    ip_watchdog_instance._redis_store.r.get.assert_called_once_with("current_ip")
    assert ip_watchdog_instance._redis_store.r.set.called_once_with("current_ip", b"192.168.2.123")
    socket.gethostbyname.assert_called_once_with(CURRENT_HOSTNAME)