"""Suite-wide isolation of `Settings` from developer environment files."""

from __future__ import annotations

from pathlib import Path

import transcription.config as config_module
from transcription.config import Settings
from transcription.config import resolve_settings_env_file_path


def test_settings_defaults_are_not_overridden_by_a_local_env_file():
    """A bare `Settings(...)` must observe declared defaults, not developer machine state."""
    settings = Settings(openrouter_api_key="test-key")

    assert settings.environment == "development"
    assert settings.log_dir == Path("./data/logs")
    assert settings.host == "0.0.0.0"
    assert settings.port == 8000


def test_explicit_env_file_still_loads(tmp_path):
    """Isolation must not disable env-file loading for tests that opt into it."""
    env_path = tmp_path / ".env"
    env_path.write_text("PORT=9123\n", encoding="utf-8")

    settings = Settings(openrouter_api_key="test-key", _env_file=env_path, _cli_parse_args=False)

    assert settings.port == 9123


def test_settings_env_file_resolves_from_override_environment_variable(tmp_path, monkeypatch):
    env_path = tmp_path / "custom.env"
    env_path.write_text("PORT=9123\n", encoding="utf-8")
    monkeypatch.setenv("ENV_FILE", str(env_path))

    settings = Settings(openrouter_api_key="test-key", _cli_parse_args=False)

    assert settings.port == 9123


def test_settings_default_env_path_is_anchored_to_project_root(tmp_path, monkeypatch):
    monkeypatch.delenv("ENV_FILE", raising=False)
    monkeypatch.chdir(tmp_path)
    monkeypatch.setattr(config_module, "PROJECT_ROOT", tmp_path / "project-root")

    resolved = resolve_settings_env_file_path()

    assert resolved == tmp_path / "project-root" / ".env.production"