"""Tests for tiny helpers in app.routers.api."""
from __future__ import annotations

import pytest

pytest.importorskip("fastapi")
pytest.importorskip("sqlalchemy")

from datetime import datetime, timedelta, timezone

from app.routers.api import _fmt_age, _md_to_html


def test_fmt_age_none():
    assert _fmt_age(datetime.now(timezone.utc), None) == "—"


def test_fmt_age_units():
    now = datetime(2026, 5, 15, 12, 0, tzinfo=timezone.utc)
    assert _fmt_age(now, now - timedelta(seconds=30)) == "30s"
    assert _fmt_age(now, now - timedelta(minutes=5)) == "5m"
    assert _fmt_age(now, now - timedelta(hours=3)) == "3h"
    assert _fmt_age(now, now - timedelta(days=2)) == "2d"


def test_md_to_html_headers_and_bold():
    src = "## Section one\n\nBody text with **bold** word.\n\n## Section two\n\nMore."
    out = _md_to_html(src)
    assert "<h3>Section one</h3>" in out
    assert "<strong>bold</strong>" in out
    assert "<p>" in out


def test_md_to_html_preserves_line_breaks_inside_block():
    src = "Line one\nLine two"
    out = _md_to_html(src)
    assert "Line one<br>Line two" in out