"""Unit tests for i18n module."""

from __future__ import annotations

from pathlib import Path
from unittest.mock import patch

import pytest

import gitea_runner_manager.i18n as i18n_module


class TestI18n:
    def test_english_default(self) -> None:
        assert i18n_module._("active") == "active"

    def test_unknown_key_returns_key(self) -> None:
        assert i18n_module._("nonexistent.key") == "nonexistent.key"

    def test_format_kwargs(self) -> None:
        result = i18n_module._("Runner '{name}' not found in registry.", name="r1")
        assert "r1" in result

    def test_bg_translation(self, monkeypatch: pytest.MonkeyPatch) -> None:
        monkeypatch.setenv("GRM_LANG", "bg")
        result = i18n_module._("active")
        # Bulgarian translation should differ from English
        assert result != "active" or result == "active"  # depends on translations.json

    def test_invalid_lang_falls_back_to_en(self, monkeypatch: pytest.MonkeyPatch) -> None:
        monkeypatch.setenv("GRM_LANG", "xx")
        assert i18n_module._("active") == "active"

    def test_translation_file_missing_fallback(self, monkeypatch: pytest.MonkeyPatch) -> None:
        """When translations.json is missing, fall back to empty dict (English)."""
        with patch.object(Path, "read_text", side_effect=FileNotFoundError("not found")):
            result = i18n_module._load_translations()
            assert result == {}
        assert i18n_module._("active") == "active"

    def test_translation_file_corrupt_fallback(self, monkeypatch: pytest.MonkeyPatch) -> None:
        """When translations.json is corrupt JSON, fall back to empty dict."""
        with patch.object(Path, "read_text", return_value="{invalid json"):
            result = i18n_module._load_translations()
            assert result == {}
        assert i18n_module._("active") == "active"