import unittest
import os
from unittest.mock import patch
from backend.config.settings import settings

class TestValidLLMProviderSettings(unittest.TestCase):

    @patch.dict(os.environ, {
        'GOOGLE_API_KEY': 'ivq',
        'GOOGLE_MAX_TOKENS': '1200',
        'OPENAI_API_KEY': 'xyz',
        'OPENAI_MAX_TOKENS': '3800',
        'LLM_PROVIDER': 'openai'
    })
    def test_valid_llm_provider_settings(self):
        """
        Test settings object provides correct config when LLM_PROVIDER is set
        """
        # reinitialize settings instance
        settings.__init__()

        llm_config = settings.get_llm_config()
        self.assertEqual(llm_config['api_key'], 'xyz')
        self.assertEqual(llm_config['max_tokens'], 3800)

class TestInvalidLLMProviderSettings(unittest.TestCase):

    @patch.dict(os.environ, {
        'LLM_PROVIDER': 'microsoft'
    })
    def test_invalid_llm_provider_settings(self):
        """
        Test that improper provider config raises the right error
        """
        # reinitialize settings instance
        settings.__init__()

        with self.assertRaisesRegex(ValueError, "Unsupported"):
            settings.get_llm_config()