"""
    file: test_server.py

    adds server functionality-tests for pytest

    date: 11.07.2019
"""
import pytest


def test_ping(server):
    assert server.ping(server, "tolsun.oulu.fi") == "PONG"


@pytest.mark.parametrize("test_input,expected", [("password", True), ("wrong password", False)])
def test_command_pass(server, test_input, expected):
    """
           Command: PASS
    Parameters: <password>

    The PASS command is used to set a 'connection password'.  The
    password can and must be set before any attempt to register the
    connection is made.  Currently this requires that clients send a PASS
    command before sending the NICK/USER combination and servers *must*
    send a PASS command before any SERVER command.  The password supplied
    must match the one contained in the C/N lines (for servers) or I
    lines (for clients).  It is possible to send multiple PASS commands
    before registering but only the last one sent is used for
    verification and it may not be changed once registered.  Numeric
    Replies:

           ERR_NEEDMOREPARAMS              ERR_ALREADYREGISTRED

    Example:

           PASS secretpasswordhere
    """
    server.password = "password"
    assert server.command_pass(server, test_input) == expected


def create_user_list():
    user_list = list()
    user_id = "user"
    for i in range(0, 9):
        user_list.append((user_id + str(i)))

    return user_list


@pytest.mark.parametrize("user_list, user_to_change, nickname, expected_result",
                         [
                             (create_user_list(), "user2", "wayne", True),
                             (create_user_list(), "user2", "user4", True),
                             (create_user_list(), "user2", "christoph", True),
                             (create_user_list(), "user2", "user19", True)])
def test_change_nickname(server, user_list,user_to_change, nickname, expected_result):
    """
        Command: NICK
       Parameters: <nickname> [ <hopcount> ]

       NICK message is used to give user a nickname or change the previous
       one.  The <hopcount> parameter is only used by servers to indicate
       how far away a nick is from its home server.  A local connection has
       a hopcount of 0.  If supplied by a client, it must be ignored.

       If a NICK message arrives at a server which already knows about an
       identical nickname for another client, a nickname collision occurs.
       As a result of a nickname collision, all instances of the nickname
       are removed from the server's database, and a KILL command is issued
       to remove the nickname from all other server's database. If the NICK
       message causing the collision was a nickname change, then the
       original (old) nick must be removed as well.

       If the server recieves an identical NICK from a client which is
       directly connected, it may issue an ERR_NICKCOLLISION to the local
       client, drop the NICK command, and not generate any kills.
    """
    server.user_list = create_user_list()
    assert server.command_nickname(server, user_to_change, nickname) == expected_result
    assert user_to_change not in server.user_list
    if nickname not in user_list:
        assert nickname in server.user_list
    else:
        assert nickname not in server.user_list