"""
Unit tests for handler_base.config module.
"""
import os
import pytest


class TestSettings:
    """Tests for Settings configuration."""
    
    def test_default_settings(self, settings):
        """Test that default settings are loaded correctly."""
        assert settings.service_name == "test-service"
        assert settings.service_version == "1.0.0-test"
        assert settings.otel_enabled is False
    
    def test_settings_from_env(self, monkeypatch):
        """Test that settings can be loaded from environment variables."""
        monkeypatch.setenv("SERVICE_NAME", "env-service")
        monkeypatch.setenv("SERVICE_VERSION", "2.0.0")
        monkeypatch.setenv("NATS_URL", "nats://custom:4222")
        
        # Need to reimport to pick up env changes
        from handler_base.config import Settings
        s = Settings()
        
        assert s.service_name == "env-service"
        assert s.service_version == "2.0.0"
        assert s.nats_url == "nats://custom:4222"
    
    def test_embeddings_settings(self):
        """Test EmbeddingsSettings extends base correctly."""
        from handler_base.config import EmbeddingsSettings
        
        s = EmbeddingsSettings()
        assert hasattr(s, "embeddings_model")
        assert hasattr(s, "embeddings_batch_size")
        assert s.embeddings_model == "bge"
    
    def test_llm_settings(self):
        """Test LLMSettings has expected defaults."""
        from handler_base.config import LLMSettings
        
        s = LLMSettings()
        assert s.llm_max_tokens == 2048
        assert s.llm_temperature == 0.7
        assert 0 <= s.llm_top_p <= 1