"""Reading the kept syslog lines (#6000): the filter read from a page's
arguments, severity by name or number, and which sources a host's or a
device's page shows."""
from types import SimpleNamespace as NS

import pytest
from werkzeug.datastructures import MultiDict

from plugins.syslog.service import DEFAULT_RANGE, device_address, line_filter, severity_level, sources_for


def test_a_severity_reads_by_name_alias_or_number():
    assert severity_level("err") == 3 and severity_level("error") == 3 and severity_level("3") == 3
    assert severity_level("Warning") == 4 and severity_level("warn") == 4
    assert severity_level("") is None and severity_level(None) is None
    with pytest.raises(ValueError, match="0-7"):
        severity_level("loud")


def test_a_page_filter_drops_what_does_not_read():
    f = line_filter(MultiDict({"severity": "loud", "range": "9y", "q": "  nfsd  ", "app": "kernel"}))
    assert (f.severity, f.range, f.text, f.app) == (None, DEFAULT_RANGE, "nfsd", "kernel")
    assert f.args() == {"q": "nfsd", "app": "kernel"}
    assert line_filter(MultiDict({"severity": "4", "range": "7d"})).args() == {"severity": "4", "range": "7d"}


def _src(sid, state="accepted", host_id=None, address="10.0.0.5", sender="", device_address=""):
    return NS(id=sid, state=state, host_id=host_id, address=address, sender=sender, device_address=device_address)


def test_a_page_shows_sources_bound_to_its_host_or_unbound_at_its_address():
    sources = [_src("bound", host_id="h1", address="10.9.9.9"), _src("by-address"),
               _src("elsewhere", host_id="h2"), _src("offered", state="offered"),
               _src("other", address="10.0.0.6")]
    assert [s.id for s in sources_for(sources, "h1", "10.0.0.5")] == ["bound", "by-address"]
    # An SNMP device bound to no host matches by its address alone.
    assert [s.id for s in sources_for(sources, None, "10.0.0.5")] == ["by-address"]
    assert sources_for(sources, None, None) == []


def test_a_device_through_dockers_address_is_placed_by_its_name_or_the_address_set():
    """#6096: through Swarm's ingress every line comes from Docker's address;
    the device's own is the one set on it, else that of the SNMP device or
    host its name is."""
    named = {"vdnt-ds923": "192.168.0.7", "vdnt-as6508t": "192.168.0.5"}
    syn = _src("syn", address="10.0.0.19", sender="VDNT-DS923")
    asus = _src("asus", address="10.0.0.19", sender="VDNT-AS6508T", device_address="192.168.0.50")
    lone = _src("lone", address="10.0.0.19", sender="router")
    assert device_address(syn, named) == "192.168.0.7"
    assert device_address(asus, named) == "192.168.0.50"             # set by hand wins
    assert device_address(lone, named) == "10.0.0.19"
    assert device_address(_src("plain", sender=""), named) == "10.0.0.5"
    sources = [syn, asus, lone]
    assert [s.id for s in sources_for(sources, None, "192.168.0.7", named)] == ["syn"]
    assert [s.id for s in sources_for(sources, None, "192.168.0.50", named)] == ["asus"]
    assert sources_for(sources, None, "192.168.0.7") == []           # no names: Docker's address only