"""Тесты рендера шаблонов (без БД и сети)."""

from __future__ import annotations

import pytest

from common.texts.render import (
    TemplateError,
    format_tops,
    format_user_list,
    format_usernames,
    render,
    validate,
)


def test_render_substitutes_and_escapes():
    template = "Привет, {username}!"
    result = render(template, {"username": "<b>bad</b>"})
    assert result == "Привет, &lt;b&gt;bad&lt;/b&gt;!"


def test_render_empty_value():
    assert render("Ник: {nick}", {"nick": None}) == "Ник: "


def test_render_unknown_tag_raises():
    with pytest.raises(TemplateError):
        render("Значение {unknown}", {})


def test_render_keeps_literal_braces_untouched():
    # Одиночная фигурная скобка не считается тегом.
    assert render("текст { не тег", {}) == "текст { не тег"


def test_validate_reports_unknown_tags():
    assert validate("Норм {username}, плохо {nope} {bad2}") == ["bad2", "nope"]


def test_format_usernames_escapes_and_joins():
    rows = [{"username": "a"}, {"username": None}, {"username": "b&c"}]
    assert format_usernames(rows) == "@a @b&amp;c"


def test_format_user_list_numbering():
    rows = [{"username": "u1", "nick": "Nick1"}, {"username": None, "nick": None}]
    assert format_user_list(rows) == "1: @u1 - Nick1\n2: — - "


def test_format_tops():
    rows = [{"nick": "N1", "count": 3}, {"nick": None, "count": 1}]
    assert format_tops(rows) == "1) N1 - 3\n2) — - 1"