from dataclasses import replace
from pathlib import Path

import pytest
from PySide6.QtWidgets import QApplication

from agr_assistent.config import ConfigError, load_config, save_config_updates
from agr_assistent.core.settings import Settings, needs_restart
from agr_assistent.ui.settings_dialog import SettingsDialog

_USER_CONFIG = """\
# мой конфиг
llm:
  provider: ollama  # локально
  providers:
    openrouter:
      api_key: ${TEST_SETTINGS_KEY}
"""


@pytest.fixture
def config_path(tmp_path: Path) -> Path:
    path = tmp_path / "config.yaml"
    path.write_text(_USER_CONFIG, encoding="utf-8")
    return path


def test_save_keeps_comments_and_env_references(config_path: Path) -> None:
    config = save_config_updates(
        config_path, {"llm.provider": "openrouter", "wake_word.phrases": ["эй", "компьютер"]}
    )

    text = config_path.read_text(encoding="utf-8")
    assert "# мой конфиг" in text
    assert "provider: openrouter # локально" in text
    assert "api_key: ${TEST_SETTINGS_KEY}" in text
    assert config.llm.provider == "openrouter"
    assert load_config(config_path).wake_word.phrases == ["эй", "компьютер"]


def test_invalid_update_does_not_touch_file(config_path: Path) -> None:
    with pytest.raises(ConfigError):
        save_config_updates(config_path, {"llm.provider": "nope"})

    assert config_path.read_text(encoding="utf-8") == _USER_CONFIG


def test_restart_is_needed_only_for_heavy_settings(config_path: Path) -> None:
    config = load_config(config_path)

    live = replace(config, tts=replace(config.tts, enabled=False))
    live.llm = replace(config.llm, temperature=0.1)
    assert not needs_restart(config, live)
    assert needs_restart(config, replace(config, voice=replace(config.voice, hotkey="f9")))
    assert needs_restart(config, replace(config, tts=replace(config.tts, speaker="aidar")))


def test_dialog_saves_only_changed_values(
    qapp: QApplication, config_path: Path, monkeypatch: pytest.MonkeyPatch
) -> None:
    monkeypatch.setenv("TEST_SETTINGS_KEY", "secret")
    settings = Settings(load_config(config_path))
    changes: list[object] = []
    settings.changed.connect(changes.append)
    dialog = SettingsDialog(settings)

    # Переключаемся на openrouter: ключ показан ссылкой на переменную, а не секретом
    dialog._provider.setCurrentText("openrouter")
    assert dialog._api_key.text() == "${TEST_SETTINGS_KEY}"
    dialog._model.setEditText("anthropic/claude-sonnet-5")
    dialog._tts_enabled.setChecked(False)

    assert dialog._collect() == {
        "llm.provider": "openrouter",
        "llm.providers.openrouter.model": "anthropic/claude-sonnet-5",
        "tts.enabled": False,
    }

    dialog._save()

    text = config_path.read_text(encoding="utf-8")
    assert "secret" not in text
    assert settings.config.llm.active_provider.model == "anthropic/claude-sonnet-5"
    assert settings.config.llm.active_provider.api_key == "secret"
    assert len(changes) == 1