from __future__ import annotations

import pytest
from pydantic import ValidationError

from {{ cookiecutter.package_name }}.commands import format_greeting
from {{ cookiecutter.package_name }}.config import get_config, get_config_source
from {{ cookiecutter.package_name }}.config.paths import ENV_CONFIG_VAR, config_file_path


def test_env_config_override(tmp_path, monkeypatch) -> None:
    config_path = tmp_path / "config.toml"
    config_path.write_text('[app]\ngreeting = "Hi"\n\n[database]\npath = "/tmp/app.db"\n')
    monkeypatch.setenv(ENV_CONFIG_VAR, str(config_path))

    settings = get_config()

    assert settings.app.greeting == "Hi"
    assert settings.database.path == "/tmp/app.db"
    assert get_config_source() == config_path


def test_missing_env_config_raises(tmp_path, monkeypatch) -> None:
    missing = tmp_path / "missing.toml"
    monkeypatch.setenv(ENV_CONFIG_VAR, str(missing))

    with pytest.raises(FileNotFoundError, match="Config file not found"):
        get_config()


def test_xdg_default_config_is_loaded(monkeypatch) -> None:
    path = config_file_path()
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text('[app]\ngreeting = "Hola"\n\n[database]\npath = "/tmp/default.db"\n')
    monkeypatch.delenv(ENV_CONFIG_VAR, raising=False)

    settings = get_config()

    assert settings.app.greeting == "Hola"
    assert settings.database.path == "/tmp/default.db"
    assert get_config_source() == path


def test_unknown_key_raises_validation_error(tmp_path, monkeypatch) -> None:
    config_path = tmp_path / "config.toml"
    config_path.write_text('unknown = "value"\n')
    monkeypatch.setenv(ENV_CONFIG_VAR, str(config_path))

    with pytest.raises(ValidationError):
        get_config()


def test_settings_are_frozen() -> None:
    settings = get_config()

    with pytest.raises(ValidationError, match="frozen"):
        settings.app.greeting = "Mutated"


def test_format_greeting() -> None:
    assert format_greeting("Ada") == "Hello, Ada!"
    assert format_greeting("Ada", greeting="Hi") == "Hi, Ada!"