"""The Syslog page (#5999): whether the listener is open or why not, the
sources kept, and the senders offered to an admin to add or ignore."""
from datetime import datetime, timedelta, timezone
from types import SimpleNamespace as NS

from tests._templates import render_plugin_template
from tests.test_style_tokens import hex_colours


def _listener(**over):
    base = {"port": 5514, "protocols": ["UDP", "TCP"], "listening": True, "error": None,
            "bound_at": datetime.now(timezone.utc) - timedelta(hours=2), "received": 1204,
            "dropped": 0, "unoffered": 0, "connections": 1, "senders_full": False, "max_senders": 200}
    return {**base, **over}


def _source(name, state, level=6, line="nfsd: server not responding", host=None):
    now = datetime.now(timezone.utc)
    return {"id": f"id-{name}", "address": "192.168.0.7", "state": state, "name": name,
            "hostname_seen": "synnas", "host": host, "first_seen_at": now - timedelta(days=1),
            "last_seen_at": now - timedelta(minutes=3), "lines_total": 1204,
            "severity": "err" if level == 3 else "info", "level": level, "last_line": line,
            "suggested_host": "h1", "rate": 12 if state == "accepted" else None}


async def _render(app, role, **ctx):
    from quart import session
    ctx = {"listener": _listener(), "sources": [], "offered": [], "ignored": [],
           "hosts": [NS(id="h1", name="SynNAS", address="192.168.0.7")],
           "now": datetime.now(timezone.utc), **ctx}
    async with app.test_request_context("/plugins/syslog/"):
        session["user_role"] = role
        page = await render_plugin_template(app, "syslog", "syslog/index.html", **ctx)
    return " ".join(page.split())


async def test_an_offered_sender_can_be_added_or_ignored_by_an_admin(app):
    page = await _render(app, "admin", offered=[_source("synnas", "offered", level=3)])
    assert "Sending, not added" in page and "calls itself synnas" in page
    assert 'action="/plugins/syslog/sources/id-synnas/add"' in page
    assert 'action="/plugins/syslog/sources/id-synnas/ignore"' in page
    assert '<option value="h1" selected>SynNAS</option>' in page          # the host at its address
    assert 'class="tone-crit">err</span> nfsd: server not responding' in page
    assert "UDP and TCP port 5514" in page and "1,204 lines received" in page
    main = page[page.index("<main"):]
    assert "font-weight:600" not in main and not hex_colours(main), hex_colours(main)


async def test_a_viewer_sees_sources_but_no_controls(app):
    page = await _render(app, "viewer", sources=[_source("SynNAS", "accepted", host=NS(id="h1", name="SynNAS"))],
                         offered=[_source("router", "offered")])
    assert 'href="/hosts/h1"' in page and 'href="/plugins/syslog/sources/id-SynNAS"' in page
    assert "/add" not in page and "/ignore" not in page and "/edit" not in page
    assert "Sending, not added" in page


async def test_a_port_it_cannot_open_is_said(app):
    page = await _render(app, "admin", listener=_listener(
        listening=False, error="Port 514 couldn't be opened (UDP: Permission denied)."))
    assert "Not listening" in page and "Port 514 couldn&#39;t be opened" in page
    assert "below 1024" in page
    assert "No sources yet." in page


async def test_the_edit_page_has_its_trail_and_a_remove(app):
    from quart import session
    source = NS(id="s1", name="SynNAS", hostname_seen="synnas", address="192.168.0.7", host_id=None)
    async with app.test_request_context("/plugins/syslog/sources/s1/edit"):
        session["user_role"] = "admin"
        page = await render_plugin_template(app, "syslog", "syslog/edit.html", source=source,
                                            hosts=[], label="SynNAS")
    page = " ".join(page.split())
    assert 'href="/plugins/syslog/">Syslog</a>' in page
    assert 'action="/plugins/syslog/sources/s1/delete"' in page and "data-confirm=" in page


def _line(i, level=6, app="kernel", message="nfsd: server not responding", minutes=1):
    now = datetime.now(timezone.utc)
    return {"id": f"l{i}", "received_at": now - timedelta(minutes=minutes), "sent_at": None,
            "level": level, "severity": {3: "err", 4: "warning"}.get(level, "info"),
            "facility": "kern", "hostname": "synnas", "app": app, "message": message,
            "group": "Today", "opens_group": i == 0}


async def test_a_source_page_filters_its_lines_and_scrolls_on(app):
    from quart import session
    from plugins.syslog.service import SEVERITY_CHOICES, LineFilter
    src = {**_source("SynNAS", "accepted"), "rate": 42}
    async with app.test_request_context("/plugins/syslog/sources/id-SynNAS"):
        session["user_role"] = "viewer"
        page = await render_plugin_template(
            app, "syslog", "syslog/source.html", source=src, f=LineFilter(severity=3), filtered=True,
            lines=[_line(0, level=3), _line(1, app="", message="a <b> tag")],
            more_url="/plugins/syslog/sources/id-SynNAS?severity=3&before=x", severities=SEVERITY_CHOICES,
            apps=["kernel", "nfsd"], ranges=["1h", "24h"])
    page = " ".join(page.split())
    assert 'href="/plugins/syslog/">Syslog</a>' in page                      # its trail
    assert "42 lines in the last hour" in page
    assert '<option value="3" selected>Errors and worse</option>' in page
    assert '<tr class="table-divider"><th colspan="4" scope="rowgroup">Today</th></tr>' in page
    assert '<span class="tone-crit">err</span>' in page and "a &lt;b&gt; tag" in page
    assert 'hx-get="/plugins/syslog/sources/id-SynNAS?severity=3&amp;before=x"' in page
    assert "/edit" not in page                                               # a viewer
    main = page[page.index("<main"):]
    assert "font-weight:600" not in main and not hex_colours(main), hex_colours(main)


async def test_a_filtered_source_with_no_lines_offers_them_all_back(app):
    from quart import session
    from plugins.syslog.service import LineFilter
    async with app.test_request_context("/plugins/syslog/sources/id-SynNAS"):
        session["user_role"] = "viewer"
        table = await render_plugin_template(
            app, "syslog", "syslog/_lines_table.html", source=_source("SynNAS", "accepted"),
            f=LineFilter(text="nope"), filtered=True, lines=[], more_url=None)
    assert "No lines match these filters." in table and 'href="/plugins/syslog/sources/id-SynNAS"' in table


async def test_the_panel_names_each_source_when_there_are_several(app):
    from quart import session
    lines = [{**_line(0, level=4), "source": "SynNAS", "source_id": "s1"},
             {**_line(1), "source": "router", "source_id": "s2"}]
    async with app.test_request_context("/plugins/syslog/panel"):
        session["user_role"] = "viewer"
        one = await render_plugin_template(app, "syslog", "syslog/panel.html", lines=lines[:1],
                                           sources=[{"id": "s1", "name": "SynNAS"}])
        two = await render_plugin_template(app, "syslog", "syslog/panel.html", lines=lines,
                                           sources=[{"id": "s1", "name": "SynNAS"}, {"id": "s2", "name": "router"}])
        none = await render_plugin_template(app, "syslog", "syslog/panel.html", lines=[],
                                            sources=[{"id": "s1", "name": "SynNAS"}])
    assert "<th>Source</th>" not in one and '<span class="tone-warn">warning</span>' in one
    assert "<th>Source</th>" in two and 'href="/plugins/syslog/sources/s2">router</a>' in two
    assert "No lines in the last day." in none