"""The host page: what sits where (#5214)."""
import re
from types import SimpleNamespace

from quart import render_template, session

from steward.hosts.service import HOST_STATES, NO_GROUP


def _list_ctx(**over):
    """What the Hosts list route hands its template (#5294), with no filter set."""
    ctx = dict(hosts=[], host_status={}, uptime={}, agent={}, groups={}, group_names=[],
               f={"q": "", "group": "", "state": "", "sort": "status", "dir": "asc"},
               filter_url=lambda **kw: "/hosts/?" + "&".join(f"{k}={v}" for k, v in kw.items()),
               sort_url=lambda key: f"/hosts/?sort={key}",
               states=HOST_STATES, no_group=NO_GROUP, add=None)
    ctx.update(over)
    ctx.setdefault("total", len(ctx["hosts"]))
    return ctx


def _headers(page):
    """Each table header's text, tags and arrows stripped."""
    return [re.sub(r"<[^>]+>|[↑↓]", "", h).strip() for h in re.findall(r"<th[^>]*>(.*?)</th>", page, re.S)]


async def test_ansible_comes_before_the_docker_list(app, monkeypatch):
    # The Docker list can run to dozens of containers; Ansible under it was
    # easy to miss, so it sits above.
    monkeypatch.setitem(app.config, "PLUGINS", {"docker": {"enabled": True}})
    host = SimpleNamespace(id="h1", name="box", address="10.0.0.5")
    async with app.test_request_context("/hosts/h1"):
        session["user_role"] = "operator"
        page = await render_template(
            "hosts/detail.html", host=host, monitors=[], uptime=None, alerts=[],
            linked_target=None, linkable_targets=[], ansible_sources=[])
    docker = page.index('hx-get="/plugins/docker/host/h1"')
    # #5290: Monitors and Agent share a row whose cards drop their own margin.
    assert '<div class="host-pair">' in page
    assert page.index(">Ansible</h3>") < docker
    assert page.index('hx-get="/plugins/host_agent/panel/h1"') < docker
    # Monitors are added on their own form, filed under this host (#5277);
    # each row's own page has the labelled Edit/Pause/Delete.
    assert 'href="/monitors/new?host_id=h1"' in page
    assert "row-actions" not in page and 'action="/monitors/add"' not in page


async def test_adding_a_monitor_from_a_host_page_says_whose_it_is(app):
    host = SimpleNamespace(id="h1", name="box", address="10.0.0.5")
    async with app.test_request_context("/monitors/new?host_id=h1"):
        session["user_role"] = "operator"
        page = await render_template(
            "monitors/form.html", monitor=None, host=host, mtype="icmp", config={}, types=[],
            values={"name": "", "target": "10.0.0.5", "host_id": "h1", "check_interval_seconds": 0})
    assert '<a href="/hosts/h1">box</a>' in page                    # crumb and hint name the host
    assert 'name="host_id" value="h1"' in page and 'value="10.0.0.5"' in page
    assert 'href="/hosts/h1" class="btn btn-sm btn-ghost">Cancel' in page


async def test_the_agent_card_keeps_its_actions_under_manage(app):
    """#5278: "Remove" said nothing about what it removed."""
    from datetime import datetime, timezone
    from tests._templates import render_plugin_template
    host = SimpleNamespace(id="h1", name="box", address="10.0.0.5")
    reg = SimpleNamespace(agent_version="1.8.0", last_seen_at=datetime.now(timezone.utc))
    target = SimpleNamespace(id="t1", name="box")
    async with app.test_request_context("/plugins/host_agent/panel/h1"):
        session["user_role"] = "admin"
        page = await render_plugin_template(
            app, "host_agent", "panel.html", host=host, reg=reg, reporting=True, stale=False,
            target=target, ansible_available=True, managed_key_set=True)
    manage = page.index(">Manage agent</summary>")
    assert page.index("Full metrics →") < manage
    for action in (">Update agent</button>", ">Rotate token</button>", ">Unregister agent</button>"):
        assert page.index(action) > manage
    assert ">Remove</button>" not in page


async def test_the_hosts_list_says_what_is_wrong_and_labels_its_figures(app):
    """#5279–#5281: labelled CPU and Memory, one uptime figure, status with how
    long, no SLA tab and no per-row edit/delete."""
    from datetime import datetime, timedelta, timezone
    now = datetime.now(timezone.utc)
    down = SimpleNamespace(id="h1", name="nas", address="10.0.0.5")
    quiet = SimpleNamespace(id="h2", name="pi", address="")
    async with app.test_request_context("/hosts/"):
        session["user_role"] = "admin"
        page = await render_template("hosts/list.html", **_list_ctx(
            hosts=[down, quiet],
            host_status={"h1": {"state": "down", "latency_ms": None, "count": 2,
                                "down_since": now - timedelta(minutes=12)}},
            uptime={"h1": {"24h": 91.5, "7d": 98.0, "30d": 99.42}},
            agent={"pi": {"fresh": False, "last_at": now - timedelta(minutes=7),
                          "cpu_pct": 3.0, "mem_used_pct": 41.0}}))
    # No inventory groups: no Groups column.
    assert _headers(page) == ["Name", "Address", "Status", "Latency", "Monitors", "30d uptime", "CPU", "Memory"]
    assert "for 12m" in page and "agent silent" in page and "for 7m" in page
    assert "99.42%" in page and 'title="24h 91.50% · 7d 98.00%"' in page
    assert ">41%<" in page and "tone-dim" in page                   # a silent agent's last reading, greyed
    assert "/hosts/uptime" not in page and ">Delete<" not in page and ">Edit<" not in page


async def test_a_host_without_an_agent_can_get_a_manual_install(app):
    """#5282: the manual install moved here from the fleet's add-host form."""
    from tests._templates import render_plugin_template
    host = SimpleNamespace(id="h1", name="box", address="10.0.0.5")
    async with app.test_request_context("/plugins/host_agent/panel/h1"):
        session["user_role"] = "admin"
        page = await render_plugin_template(
            app, "host_agent", "panel.html", host=host, reg=None, reporting=False, stale=False,
            target=None, ansible_available=False, managed_key_set=False)
    assert 'action="/plugins/host_agent/fleet/h1/register"' in page and ">Install manually</button>" in page


async def test_add_host_is_a_dialog_on_the_hosts_list(app):
    """#5291: the form was two fields on a page of its own."""
    async with app.test_request_context("/hosts/"):
        session["user_role"] = "operator"
        closed = await render_template("hosts/list.html", **_list_ctx())
    dialog = re.search(r'<dialog id="add-host".*?</dialog>', closed, re.S).group(0)
    assert 'action="/hosts/"' in dialog and ">Cancel</button>" in dialog
    assert re.search(r'<input[^>]*name="address"[^>]*>', dialog).group(0).count("required") == 0
    assert "showModal()\">Add host</button>" in closed
    assert "getElementById('add-host').showModal();</script>" not in closed
    assert "/hosts/new" not in closed

    async with app.test_request_context("/hosts/"):
        session["user_role"] = "viewer"
        viewer = await render_template("hosts/list.html", **_list_ctx(add={}))
    assert 'id="add-host"' not in viewer and ">Add host<" not in viewer


async def test_add_host_sends_a_clash_back_with_what_was_typed(app):
    """#5283, #5291: the list again, the dialog open, an inline error and the typed values."""
    async with app.test_request_context("/hosts/"):
        session["user_role"] = "operator"
        page = await render_template("hosts/list.html", **_list_ctx(
            add={"values": {"name": "nas", "address": "10.0.0.9"}, "error": "A host named nas already exists."}))
    assert 'role="alert">A host named nas already exists.<' in page
    assert 'value="nas"' in page and 'value="10.0.0.9"' in page
    assert "getElementById('add-host').showModal();</script>" in page


async def test_edit_host_keeps_its_page(app):
    host = SimpleNamespace(id="h1", name="nas", address="10.0.0.5")
    async with app.test_request_context("/hosts/h1/edit"):
        session["user_role"] = "operator"
        page = await render_template("hosts/form.html", host=host)
    assert 'action="/hosts/h1"' in page and 'value="nas"' in page and 'value="10.0.0.5"' in page
    assert '<a href="/hosts/h1">nas</a>' in page and ">Save</button>" in page


async def test_the_hosts_list_has_a_filter_bar_sortable_headers_and_group_chips(app):
    """#5294: search, group and status filters; headers that sort; a host's
    groups as chips that filter the list."""
    swarm = SimpleNamespace(id="h1", name="docker02", address="10.0.0.12")
    lone = SimpleNamespace(id="h2", name="util01", address="10.0.0.9")
    async with app.test_request_context("/hosts/"):
        session["user_role"] = "viewer"
        page = await render_template("hosts/list.html", **_list_ctx(
            hosts=[swarm, lone], groups={"h1": ["Docker Swarm"]}, group_names=["Docker Swarm"],
            f={"q": "", "group": "", "state": "", "sort": "cpu", "dir": "desc"}))
    bar = re.search(r'<form class="filter-bar".*?</form>', page, re.S).group(0)
    assert 'type="search" name="q"' in bar and 'hx-target="#hosts-table"' in bar and 'hx-push-url="true"' in bar
    assert '<option value="Docker Swarm">' in bar and f'<option value="{NO_GROUP}">No group</option>' in bar
    assert [o for o in re.findall(r'<option value="(\w*)"', bar.split('name="state"')[1])] == ["", "down", "silent", "up", "none"]
    assert '<input type="hidden" name="sort" value="cpu">' in bar   # a filter keeps the column sort
    assert _headers(page) == ["Name", "Address", "Groups", "Status", "Latency", "Monitors", "30d uptime", "CPU", "Memory"]
    assert 'aria-sort="descending"' in page and page.count('aria-sort="none"') == 5
    assert 'href="/hosts/?sort=uptime"' in page
    assert '<a class="chip" href="/hosts/?group=Docker Swarm"' in page
    table = page[page.index('<div id="hosts-table">'):]
    assert table.index("docker02") < table.index("util01")


def test_filter_hosts_by_search_group_and_status():
    from steward.hosts.service import filter_hosts
    hosts = [SimpleNamespace(id="h1", name="Docker02", address="10.0.0.12"),
             SimpleNamespace(id="h2", name="util01", address="10.0.0.9"),
             SimpleNamespace(id="h3", name="nas", address="")]
    status = {"h1": {"state": "down"}, "h2": {"state": "up"}}
    agent = {"util01": {"fresh": False}}
    groups = {"h1": ["Docker Swarm", "Linux"], "h2": ["Linux"]}

    def names(**kw):
        return [h.name for h in filter_hosts(hosts, status=status, agent=agent, groups=groups, **kw)]

    assert names() == ["Docker02", "util01", "nas"]
    assert names(q="docker") == ["Docker02"] and names(q="0.0.9") == ["util01"]
    assert names(group="Linux") == ["Docker02", "util01"]          # membership overlaps
    assert names(group=NO_GROUP) == ["nas"]
    assert names(state="down") == ["Docker02"] and names(state="none") == ["nas"]
    assert names(state="silent") == ["util01"] and names(state="up") == ["util01"]
    assert names(group="Linux", state="up") == ["util01"]


def test_sort_hosts_puts_missing_values_last_either_way():
    from steward.hosts.service import sort_hosts
    hosts = [SimpleNamespace(id=i, name=n, address="") for i, n in [("a", "alpha"), ("b", "bravo"), ("c", "charlie")]]
    agent = {"alpha": {"cpu_pct": 10.0, "fresh": True}, "bravo": {"cpu_pct": 70.0, "fresh": True}}
    status = {"c": {"state": "down"}}
    kw = dict(status=status, agent=agent, uptime={})

    def names(sort, desc):
        return [h.name for h in sort_hosts(hosts, sort, desc, **kw)]

    assert names("cpu", True) == ["bravo", "alpha", "charlie"]
    assert names("cpu", False) == ["alpha", "bravo", "charlie"]   # no reading: last both ways
    assert names("name", True) == ["charlie", "bravo", "alpha"]
    assert names("status", False)[0] == "charlie"                  # down first