import os
import pytest
import base64
from pathlib import Path

def test_config_defaults(test_env_vars, monkeypatch):
    """测试配置默认值."""
    # Clear GM_DATA_DIR to test default value
    monkeypatch.delenv("GM_DATA_DIR", raising=False)

    # Reload config to pick up the change
    from app.config import Settings
    settings = Settings()

    assert settings.data_dir == Path('./data')
    assert settings.host == '0.0.0.0'
    assert settings.port == 8000

def test_config_from_env(monkeypatch):
    """测试从环境变量读取配置."""
    # Set required security fields
    monkeypatch.setenv("GM_ENCRYPT_KEY", base64.b64encode(b'test-key-32-bytes-long-1234567890').decode())
    monkeypatch.setenv("GM_API_TOKEN", "test-token")
    monkeypatch.setenv("GM_DATA_DIR", "/custom/data")
    monkeypatch.setenv("GM_PORT", "9000")

    # 重新加载配置
    from app.config import Settings
    settings = Settings()

    assert settings.data_dir == Path('/custom/data')
    assert settings.port == 9000