"""docs/plugins/prometheus-widgets.md (#5694): every YAML example in the
guide passes the checker, so the guide can't drift from the format."""
import re
import textwrap

from plugins.prometheus.template_format import check
from tests._templates import REPO

GUIDE = REPO / "docs" / "plugins" / "prometheus-widgets.md"
_FENCE = re.compile(r"```yaml\n(.*?)```", re.S)


def examples(text: str) -> list[str]:
    """Each fenced YAML example as a whole template: a block on its own is
    wrapped in a name, a version and a blocks list."""
    out = []
    for body in _FENCE.findall(text):
        if body.startswith("name:"):
            out.append(body)
        else:
            out.append("name: Example\nversion: 1\nblocks:\n" + textwrap.indent(body, "  "))
    return out


def test_the_guard_can_fail():
    bad = examples("```yaml\n- states: {metric: x_state, healthy: [ok], colour: red}\n```")
    assert len(bad) == 1
    try:
        check(bad[0])
    except ValueError:
        pass
    else:
        raise AssertionError("an unknown key passed the checker")


def test_every_example_in_the_guide_is_a_template():
    found = examples(GUIDE.read_text())
    assert len(found) >= 6, len(found)       # the first template, then one per block kind
    kinds = set()
    for text in found:
        kinds.update(b.kind for b in check(text).blocks)
    assert kinds == {"states", "values", "times", "table", "info"}