"""TOML configuration loader tests."""

from pathlib import Path

import pytest

from app.core.app_config_loader import load_app_config


FIXTURES = Path(__file__).resolve().parent / "fixtures" / "config"


def test_load_default_only() -> None:
    cfg = load_app_config("development", config_dir=FIXTURES / "minimal")
    assert cfg.chat.interview_persona == "default"
    assert cfg.deploy.enable_tts is True


def test_staging_overlay_merges_chat_section() -> None:
    cfg = load_app_config("staging", config_dir=FIXTURES / "merge")
    assert cfg.chat.interview_persona == "staging_persona"
    assert cfg.chat.interview_temperature == 0.93
    assert cfg.deploy.mock_sms_login_enabled is True


def test_unknown_top_level_key_rejected(tmp_path: Path) -> None:
    bad = tmp_path / "default.toml"
    bad.write_text(
        '[deploy]\nenable_tts = true\n\n[typo_section]\nfoo = 1\n',
        encoding="utf-8",
    )
    with pytest.raises(Exception):
        load_app_config("development", config_dir=tmp_path)