refactor:

- changed method get_agent_tools for only get_tools on agent interface
- changed OllamaModelManager to correc semantic OllamaService

test:
- added test for service initialization
- added tests to list tools and create tools into  PDF agent

test/service/ollama/test_ollamaService.py

@@ -0,0 +1,84 @@
+import unittest
+from unittest.mock import patch, MagicMock
+
+from src.service.ollama.ollamaService import OllamaService
+
+
+
+
+class testOllamaService(unittest.TestCase):
+    
+    def setUp(self):
+        self.model_manager = OllamaService()
+        self.model_manager.base_url = "http://test-url:11434"
+    
+    @patch('src.service.ollama.ollamaService.requests.get')
+    def test_get_available_models_success(self, mock_get):
+        # Setup mock response
+        mock_response = MagicMock()
+        mock_response.json.return_value = {
+            'models': [
+                {'name': 'model1'},
+                {'name': 'model2'}
+            ]
+        }
+        mock_get.return_value = mock_response
+        
+        # Call method
+        result = self.model_manager.get_available_models()
+        
+        # Assertions
+        mock_get.assert_called_once_with("http://test-url:11434/api/tags")
+        self.assertEqual(len(result), 2)
+        self.assertEqual(result, [{'name': 'model1'}, {'name': 'model2'}])
+    
+    @patch('src.service.ollama.ollamaService.requests.get')
+    def test_get_available_models_exception(self, mock_get):
+        # Setup mock to raise exception
+        mock_get.side_effect = Exception("Connection error")
+        
+        # Call method
+        result = self.model_manager.get_available_models()
+        
+        # Assertions
+        self.assertEqual(result, [])
+    
+    @patch('src.service.ollama.ollamaService.requests.post')
+    def test_get_model_details_success(self, mock_post):
+        # Setup mock response
+        mock_response = MagicMock()
+        mock_response.json.return_value = {
+            'parameters': {'context_length': 4096},
+            'modelfile': {'parameter': 'llama2'},
+            'license': 'Apache 2.0'
+        }
+        mock_post.return_value = mock_response
+        
+        # Call method
+        result = self.model_manager.get_model_details('llama2')
+        
+        # Assertions
+        mock_post.assert_called_once_with(
+            "http://test-url:11434/api/show",
+            json={"name": "llama2"}
+        )
+        self.assertEqual(result['name'], 'llama2')
+        self.assertEqual(result['context_size'], 4096)
+        self.assertEqual(result['license'], 'Apache 2.0')
+    
+    @patch('src.service.ollama.ollamaService.requests.post')
+    def test_get_model_details_exception(self, mock_post):
+        # Setup mock to raise exception
+        mock_post.side_effect = Exception("API error")
+        
+        # Call method
+        result = self.model_manager.get_model_details('unknown_model')
+        
+        # Assertions
+        self.assertEqual(result['name'], 'unknown_model')
+        self.assertTrue('error' in result)
+        self.assertEqual(result['error'], 'API error')
+
+
+if __name__ == '__main__':
+    unittest.main()