"""Unit tests for the docker plugin's presentation layer (no DB).

CI never renders these templates through the running app (the unit-lane app is
created with testing=True, which skips plugin loading), so a Jinja syntax error
would otherwise ship green. These tests parse every docker template and smoke
the routes module so a broken tag or import is caught in the unit lane.
"""
import pathlib

import jinja2

from plugins.docker import routes as r

_TEMPLATES = pathlib.Path(r.__file__).parent / "templates" / "docker"


def test_all_docker_templates_parse():
    env = jinja2.Environment()
    files = sorted(_TEMPLATES.glob("*.html"))
    assert files, "no docker templates found"
    for f in files:
        # Raises TemplateSyntaxError on an unbalanced/typo'd tag.
        env.parse(f.read_text())


def test_routes_module_exposes_new_views():
    # Import-smoke + confirms the #942 view functions are defined.
    for name in ("container_detail", "container_history", "swarm", "disk", "index", "rows"):
        assert callable(getattr(r, name)), name
    assert r.docker_bp.name == "docker"


def test_human_bytes_formats_binary_units():
    assert r._human_bytes(None) == "—"
    assert r._human_bytes(0) == "0 B"
    assert r._human_bytes(512) == "512 B"
    assert r._human_bytes(1024) == "1.0 KiB"
    assert r._human_bytes(1536) == "1.5 KiB"
    assert r._human_bytes(1024 ** 2) == "1.0 MiB"
    assert r._human_bytes(int(1.5 * 1024 ** 3)) == "1.5 GiB"
    assert r._human_bytes(1024 ** 4) == "1.0 TiB"


def test_human_uptime_compact():
    from datetime import datetime, timedelta, timezone
    now = datetime.now(timezone.utc)
    assert r._human_uptime(None) is None
    assert r._human_uptime(now - timedelta(minutes=8)).endswith("m")
    assert "h" in r._human_uptime(now - timedelta(hours=5, minutes=12))
    assert "d" in r._human_uptime(now - timedelta(days=3, hours=4))