"""Glances v5 — tests for the system curses renderer (header-left block)."""

from __future__ import annotations

from glances.outputs.curses_renderer_v5 import ColorRole
from glances.plugins.system.render_curses_v5 import render

SYSTEM_FIELDS = {
    "hostname": {"unit": "string"},
    "hr_name": {"unit": "string"},
}


def test_render_shows_hostname_as_header_and_hr_name():
    payload = {"hostname": "myhost", "hr_name": "Ubuntu 24.04 64bit", "_levels": {}}
    rows = render(payload, SYSTEM_FIELDS)
    assert len(rows) == 1
    cells = rows[0].cells
    assert cells[0].text == "myhost"
    assert cells[0].color == ColorRole.HEADER
    flat = " ".join(c.text for c in cells)
    assert "Ubuntu 24.04 64bit" in flat


def test_render_empty_payload_yields_no_rows():
    assert render({}, SYSTEM_FIELDS) == []


def test_render_hide_os_info_drops_hr_name_keeps_hostname():
    """When the header line is too narrow, `view['hide_os_info']` drops the
    OS-info cell; the hostname stays (progressive degradation, level 1)."""
    payload = {"hostname": "myhost", "hr_name": "Ubuntu 24.04 64bit", "_levels": {}}
    rows = render(payload, SYSTEM_FIELDS, view={"hide_os_info": True})
    assert len(rows) == 1
    cells = rows[0].cells
    assert len(cells) == 1
    assert cells[0].text == "myhost"
    assert "Ubuntu" not in " ".join(c.text for c in cells)


def test_render_hide_os_info_false_shows_hr_name():
    payload = {"hostname": "myhost", "hr_name": "Ubuntu 24.04 64bit", "_levels": {}}
    rows = render(payload, SYSTEM_FIELDS, view={"hide_os_info": False})
    assert "Ubuntu 24.04 64bit" in " ".join(c.text for c in rows[0].cells)