refactor: add service layer architecture with Pydantic validation

- Add services layer (PartyService, ScheduleService, ProductService, ServiceCenterService)
- Add ServiceProvider for dependency injection
- Add Pydantic input validation on all MCP tools
- Add thread-safety to TrytonSettings with double-checked locking
- Update tests to mock ServiceProvider instead of direct client calls
- Add pydantic dependency

pyproject.toml

@@ -8,6 +8,7 @@ dependencies = [
     "fastmcp[tasks]>=3.1.0",
     "sabatron-tryton-rpc-client>=7.4.0",
     "python-dotenv>=1.0.0",
+    "pydantic>=2.0.0",
 ]
 
 [project.optional-dependencies]

src/tryton_mcp/__init__.py

@@ -0,0 +1,4 @@
+from tryton_mcp.config import settings, TrytonSettings
+from tryton_mcp.server import mcp
+
+__all__ = ["settings", "TrytonSettings", "mcp"]

src/tryton_mcp/config.py

@@ -1,4 +1,5 @@
 import os
+import threading
 from contextlib import asynccontextmanager
 from dataclasses import dataclass, field
 from pathlib import Path
@@ -13,6 +14,10 @@ load_dotenv(project_root / ".env")
 
 @dataclass
 class TrytonSettings:
+    _lock = threading.Lock()
+    _instance = None
+    _client: Optional[Client] = field(default=None, init=False, repr=False)
+
     hostname: str = field(
         default_factory=lambda: os.environ.get("TRYTON_HOSTNAME", "localhost")
     )
@@ -26,7 +31,6 @@ class TrytonSettings:
     port: int = field(
         default_factory=lambda: int(os.environ.get("TRYTON_PORT", "8000"))
     )
-    _client: Optional[Client] = field(default=None, init=False, repr=False)
 
     def to_dict(self) -> dict:
         return {
@@ -38,6 +42,8 @@ class TrytonSettings:
         }
 
     def get_client(self) -> Client:
+        if self._client is None:
+            with self._lock:
                 if self._client is None:
                     self._client = Client(**self.to_dict())
         return self._client

src/tryton_mcp/server.py

@@ -2,13 +2,16 @@
 MCP Server for Naliia Module
 """
 
+import logging
 from contextlib import asynccontextmanager
-from fastmcp import FastMCP
-from typing import List, Dict, AsyncIterator, Any
 from datetime import datetime, timezone
+from typing import Any, Dict, List, Optional
+
+from fastmcp import FastMCP
+from pydantic import BaseModel, Field, field_validator
 
 from tryton_mcp.config import settings
-import logging
+from tryton_mcp.services.provider import ServiceProvider
 
 logging.basicConfig(
     level=logging.INFO, format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
@@ -18,7 +21,7 @@ logger = logging.getLogger(__name__)
 
 
 @asynccontextmanager
-async def server_lifespan(server: FastMCP) -> AsyncIterator[None]:
+async def server_lifespan(server: FastMCP):
     settings.connect()
     yield
     settings.disconnect()
@@ -26,112 +29,132 @@ async def server_lifespan(server: FastMCP) -> AsyncIterator[None]:
 
 mcp = FastMCP("Tryton MCP Server", lifespan=server_lifespan)
 
+_service_provider: Optional[ServiceProvider] = None
 
-def tryton_call(name: str, args: list) -> Dict[str, Any]:
+
+def get_service_provider() -> ServiceProvider:
+    global _service_provider
+    if _service_provider is None:
+        _service_provider = ServiceProvider(settings.get_client())
+    return _service_provider
+
+
+class FindCustomerInput(BaseModel):
+    identifier: str = Field(min_length=1, description="Customer identifier code")
+
+
+class CreateCustomerInput(BaseModel):
+    name: str = Field(min_length=1, description="Customer name")
+    identifiers: List[tuple[str, List[Dict[str, Any]]]] = Field(
+        default_factory=list, description="List of identifier tuples"
+    )
+
+
+class CreateScheduleInput(BaseModel):
+    professional: int = Field(gt=0, description="Professional ID")
+    description: str = Field(
+        min_length=1, max_length=500, description="Appointment description"
+    )
+    customer: int = Field(gt=0, description="Customer ID")
+    date: str = Field(description="Date in ISO format (e.g., 2026-03-15T10:00:00)")
+    service_center: int = Field(gt=0, description="Service center ID")
+
+    @field_validator("date")
+    @classmethod
+    def validate_date(cls, v: str) -> str:
         try:
-        client = settings.get_client()
+            datetime.fromisoformat(v)
-        response = client.call(name, args)
+        except ValueError:
-        return {"success": True, "data": response}
+            raise ValueError(
-    except Exception as e:
+                f"Invalid date format: '{v}'. Expected ISO format (e.g., '2026-03-15T10:00:00' or '2026-03-15T10:00:00+00:00')"
-        return {"success": False, "error": str(e)}
+            )
+        return v
+
+
+class FindServiceCentersInput(BaseModel):
+    offset: int = Field(default=0, ge=0, description="Offset for pagination")
+    limit: Optional[int] = Field(default=None, ge=1, description="Limit for pagination")
+
+
+class FindProductsInput(BaseModel):
+    offset: int = Field(default=0, ge=0, description="Offset for pagination")
+    limit: Optional[int] = Field(default=None, ge=1, description="Limit for pagination")
 
 
 @mcp.tool()
 def find_customer_by_identifier(identifier: str) -> List[Dict]:
-    result = tryton_call(
+    FindCustomerInput(identifier=identifier)
-        "model.party.identifier.search_read",
-        [
-            [["code", "=", identifier]],
-            0,
-            None,
-            None,
-            ["party", "party.name"],
-            {"company": 1},
-        ],
-    )
 
-    if not result["success"]:
+    services = get_service_provider()
+    result = services.party.find_by_identifier(identifier)
+
+    if result.is_error:
         raise Exception(f"Customer with identifier {identifier} not found.")
 
-    return result["data"]
+    return result.data
 
 
 @mcp.tool()
 def create_customer(
     name: str, identifiers: List[tuple[str, List[Dict[str, Any]]]]
 ) -> List[int]:
+    CreateCustomerInput(name=name, identifiers=identifiers)
 
-    result = tryton_call(
+    services = get_service_provider()
-        "model.party.party.create",
+    result = services.party.create(name, identifiers)
-        [{"name": name, "identifiers": identifiers}, {}],
-    )
 
-    if not result["success"]:
+    if result.is_error:
-        raise Exception(f"Failed to create {name} as customer")
+        raise Exception(f"Failed to create {name} as customer: {result.error}")
 
-    return result["data"]
+    return result.data
 
 
 @mcp.tool()
 def create_schedule(
     professional: int, description: str, customer: int, date: str, service_center: int
 ) -> List[int]:
-
+    CreateScheduleInput(
-    try:
+        professional=professional,
-        dt = datetime.fromisoformat(date)
+        description=description,
-    except ValueError:
+        customer=customer,
-        raise ValueError(
+        date=date,
-            f"Invalid date format: '{date}'. Expected ISO format (e.g., '2026-03-15T10:00:00' or '2026-03-15T10:00:00+00:00')"
+        service_center=service_center,
     )
 
-    utc_dt = dt.astimezone(timezone.utc)
+    services = get_service_provider()
+    result = services.schedule.create(
+        professional, description, customer, date, service_center
+    )
 
-    example_schedule = [
+    if result.is_error:
-        {
+        raise Exception(f"Failed to create schedule: {result.error}")
-            "professional": professional,
-            "description": description,
-            "customer": customer,
-            "date": utc_dt,
-            "service_center": service_center,
-        }
-    ]
 
-    result = tryton_call("model.naliia.schedule.create", [example_schedule, {}])
+    return result.data
-
-    if not result["success"]:
-        raise Exception(f"Failed to create schedule: {result['error']}")
-
-    return result["data"]
 
 
 @mcp.tool()
-def find_service_centers():
+def find_service_centers(offset: int = 0, limit: Optional[int] = None) -> List[Dict]:
-    result = tryton_call(
+    FindServiceCentersInput(offset=offset, limit=limit)
-        "model.naliia.service_center.search_read",
-        [[[]], 0, None, None, ["name", "address.street"], {}],
-    )
 
-    if not result["success"]:
+    services = get_service_provider()
-        raise Exception(f"Failed to find service centers: {result['error']}")
+    result = services.service_center.find_all(offset=offset, limit=limit)
 
-    return result["data"]
+    if result.is_error:
+        raise Exception(f"Failed to find service centers: {result.error}")
+
+    return result.data
 
 
 @mcp.tool()
-def find_products_and_services():
+def find_products_and_services(
-    result = tryton_call(
+    offset: int = 0, limit: Optional[int] = None
-        "model.product.product.search_read",
+) -> List[Dict]:
-        [
+    FindProductsInput(offset=offset, limit=limit)
-            [["active", "=", True], ["salable", "=", True]],
-            0,
-            None,
-            None,
-            ["name", "list_price", "description"],
-            {"company": 1},
-        ],
-    )
 
-    if not result["success"]:
+    services = get_service_provider()
-        raise Exception(f"Failed to find products: {result['error']}")
+    result = services.product.find_salable(offset=offset, limit=limit)
 
-    return result["data"]
+    if result.is_error:
+        raise Exception(f"Failed to find products: {result.error}")
+
+    return result.data

src/tryton_mcp/services/__init__.py

@@ -0,0 +1,14 @@
+from tryton_mcp.services.base import BaseService, TrytonResponse
+from tryton_mcp.services.party import PartyService
+from tryton_mcp.services.schedule import ScheduleService
+from tryton_mcp.services.product import ProductService
+from tryton_mcp.services.service_center import ServiceCenterService
+
+__all__ = [
+    "BaseService",
+    "TrytonResponse",
+    "PartyService",
+    "ScheduleService",
+    "ProductService",
+    "ServiceCenterService",
+]

src/tryton_mcp/services/base.py

@@ -0,0 +1,28 @@
+from typing import Any, Dict, List, Optional
+from dataclasses import dataclass
+
+
+@dataclass
+class TrytonResponse:
+    success: bool
+    data: Any = None
+    error: Optional[str] = None
+
+    @property
+    def is_error(self) -> bool:
+        return not self.success
+
+
+class BaseService:
+    def __init__(self, client: Any):
+        self._client = client
+
+    def call(self, method: str, args: List[Any]) -> TrytonResponse:
+        try:
+            response = self._client.call(method, args)
+            return TrytonResponse(success=True, data=response)
+        except Exception as e:
+            return TrytonResponse(success=False, error=str(e))
+
+    def _get_client(self) -> Any:
+        return self._client

src/tryton_mcp/services/party.py

@@ -0,0 +1,43 @@
+from typing import Any, Dict, List, Optional
+
+from tryton_mcp.services.base import BaseService, TrytonResponse
+
+
+class PartyService(BaseService):
+    def find_by_identifier(self, identifier: str) -> TrytonResponse:
+        return self.call(
+            "model.party.identifier.search_read",
+            [
+                [["code", "=", identifier]],
+                0,
+                None,
+                None,
+                ["party", "party.name"],
+                {"company": 1},
+            ],
+        )
+
+    def create(
+        self, name: str, identifiers: List[tuple[str, List[Dict[str, Any]]]]
+    ) -> TrytonResponse:
+        return self.call(
+            "model.party.party.create",
+            [{"name": name, "identifiers": identifiers}, {}],
+        )
+
+    def search_parties(
+        self,
+        domain: Optional[List[Any]] = None,
+        offset: int = 0,
+        limit: Optional[int] = None,
+        fields: Optional[List[str]] = None,
+    ) -> TrytonResponse:
+        if domain is None:
+            domain = []
+        if fields is None:
+            fields = ["name", "id"]
+
+        return self.call(
+            "model.party.party.search_read",
+            [domain, offset, limit, None, fields, {}],
+        )

src/tryton_mcp/services/product.py

@@ -0,0 +1,39 @@
+from typing import Any, List, Optional
+
+from tryton_mcp.services.base import BaseService, TrytonResponse
+
+
+class ProductService(BaseService):
+    def find_salable(
+        self,
+        offset: int = 0,
+        limit: Optional[int] = None,
+    ) -> TrytonResponse:
+        return self.call(
+            "model.product.product.search_read",
+            [
+                [["active", "=", True], ["salable", "=", True]],
+                offset,
+                limit,
+                None,
+                ["name", "list_price", "description"],
+                {"company": 1},
+            ],
+        )
+
+    def search(
+        self,
+        domain: Optional[List[Any]] = None,
+        offset: int = 0,
+        limit: Optional[int] = None,
+        fields: Optional[List[str]] = None,
+    ) -> TrytonResponse:
+        if domain is None:
+            domain = []
+        if fields is None:
+            fields = ["id", "name", "list_price"]
+
+        return self.call(
+            "model.product.product.search_read",
+            [domain, offset, limit, None, fields, {}],
+        )

src/tryton_mcp/services/provider.py

@@ -0,0 +1,37 @@
+from tryton_mcp.services.party import PartyService
+from tryton_mcp.services.schedule import ScheduleService
+from tryton_mcp.services.product import ProductService
+from tryton_mcp.services.service_center import ServiceCenterService
+
+
+class ServiceProvider:
+    def __init__(self, client):
+        self._client = client
+        self._party_service: PartyService | None = None
+        self._schedule_service: ScheduleService | None = None
+        self._product_service: ProductService | None = None
+        self._service_center_service: ServiceCenterService | None = None
+
+    @property
+    def party(self) -> PartyService:
+        if self._party_service is None:
+            self._party_service = PartyService(self._client)
+        return self._party_service
+
+    @property
+    def schedule(self) -> ScheduleService:
+        if self._schedule_service is None:
+            self._schedule_service = ScheduleService(self._client)
+        return self._schedule_service
+
+    @property
+    def product(self) -> ProductService:
+        if self._product_service is None:
+            self._product_service = ProductService(self._client)
+        return self._product_service
+
+    @property
+    def service_center(self) -> ServiceCenterService:
+        if self._service_center_service is None:
+            self._service_center_service = ServiceCenterService(self._client)
+        return self._service_center_service

src/tryton_mcp/services/schedule.py

@@ -0,0 +1,53 @@
+from datetime import datetime, timezone
+from typing import Any, Dict, List, Optional
+
+from tryton_mcp.services.base import BaseService, TrytonResponse
+
+
+class ScheduleService(BaseService):
+    def create(
+        self,
+        professional: int,
+        description: str,
+        customer: int,
+        date: str,
+        service_center: int,
+    ) -> TrytonResponse:
+        try:
+            dt = datetime.fromisoformat(date)
+        except ValueError as e:
+            return TrytonResponse(
+                success=False,
+                error=f"Invalid date format: '{date}'. Expected ISO format. Error: {e}",
+            )
+
+        utc_dt = dt.astimezone(timezone.utc)
+
+        schedule_data = [
+            {
+                "professional": professional,
+                "description": description,
+                "customer": customer,
+                "date": utc_dt,
+                "service_center": service_center,
+            }
+        ]
+
+        return self.call("model.naliia.schedule.create", [schedule_data, {}])
+
+    def search(
+        self,
+        domain: Optional[List[Any]] = None,
+        offset: int = 0,
+        limit: Optional[int] = None,
+        fields: Optional[List[str]] = None,
+    ) -> TrytonResponse:
+        if domain is None:
+            domain = []
+        if fields is None:
+            fields = ["id", "professional", "description", "customer", "date"]
+
+        return self.call(
+            "model.naliia.schedule.search_read",
+            [domain, offset, limit, None, fields, {}],
+        )

src/tryton_mcp/services/service_center.py

@@ -0,0 +1,32 @@
+from typing import Any, List, Optional
+
+from tryton_mcp.services.base import BaseService, TrytonResponse
+
+
+class ServiceCenterService(BaseService):
+    def find_all(
+        self,
+        offset: int = 0,
+        limit: Optional[int] = None,
+    ) -> TrytonResponse:
+        return self.call(
+            "model.naliia.service_center.search_read",
+            [[[]], offset, limit, None, ["name", "address.street"], {}],
+        )
+
+    def search(
+        self,
+        domain: Optional[List[Any]] = None,
+        offset: int = 0,
+        limit: Optional[int] = None,
+        fields: Optional[List[str]] = None,
+    ) -> TrytonResponse:
+        if domain is None:
+            domain = []
+        if fields is None:
+            fields = ["id", "name", "address.street"]
+
+        return self.call(
+            "model.naliia.service_center.search_read",
+            [domain, offset, limit, None, fields, {}],
+        )

tests/test_customer.py

@@ -1,48 +1,61 @@
 import pytest
-import sys
+import pytest_asyncio
-from pathlib import Path
+from unittest.mock import MagicMock, patch
 import json
 
-from tryton_mcp.server import create_customer
+import sys
-
+from pathlib import Path
 
 sys.path.insert(0, str(Path(__file__).parent / "src"))
 
 
+@pytest.fixture
+def mock_client():
+    return MagicMock()
+
+
+@pytest.fixture
+def mock_service_provider(mock_client):
+    provider_mock = MagicMock()
+    mock_response = MagicMock()
+    mock_response.is_error = False
+    mock_response.data = []
+
+    provider_mock.party.find_by_identifier.return_value = mock_response
+    provider_mock.party.create.return_value = mock_response
+
+    return provider_mock
+
+
+@pytest.fixture
+def server_with_mocks(mock_service_provider):
+    with patch("tryton_mcp.server._service_provider", mock_service_provider):
+        yield mock_service_provider
+
+
 @pytest.mark.asyncio
 class TestParty:
+    async def test_create_new_customer(self, server_with_mocks):
+        from tryton_mcp.server import create_customer
 
-    async def test_create_new_customer(self, mcp_client, mock_settings):
+        server_with_mocks.party.create.return_value.data = [1]
-        mock_client = mock_settings.get_client.return_value
-        mock_client.call.return_value = [1]
 
-        result = await mcp_client.call_tool(
+        result = create_customer(
-            "create_customer",
+            name="Alejandro Zapata",
-            {
+            identifiers=[["create", [{"type": "mobile", "code": "310659595"}]]],
-                "name": "Alejandro Zapata",
-                "identifiers": [["create", [{"type": "mobile", "code": "310659595"}]]],
-            },
         )
 
-        assert result.content is not None
+        assert result == [1]
-        assert len(result.content) == 1
-        assert result.content[0].text == "[1]"
 
-    async def test_find_customer(self, mcp_client, mock_settings):
+    async def test_find_customer(self, server_with_mocks):
+        from tryton_mcp.server import find_customer_by_identifier
 
         expected_return = [
-            {'id': 19, 'party': 44, 'party.': {'name': 'Alejandro Zapata', 'id': 44}}
+            {"id": 19, "party": 44, "party.": {"name": "Alejandro Zapata", "id": 44}}
         ]
 
-        mock_client = mock_settings.get_client.return_value
+        server_with_mocks.party.find_by_identifier.return_value.data = expected_return
-        mock_client.call.return_value = expected_return
 
-        result = await mcp_client.call_tool(
+        result = find_customer_by_identifier("310659595")
-            "find_customer_by_identifier",
-            {
-                "identifier": "310659595"
-            })
 
-        assert result.content is not None
+        assert result == expected_return
-        assert len(result.content) == 1
-        assert json.loads(result.content[0].text) == expected_return

tests/test_server.py

@@ -1,8 +1,8 @@
 import pytest
+import pytest_asyncio
 from unittest.mock import MagicMock, patch
-import datetime
 import json
-from fastmcp.exceptions import ToolError
+from contextlib import asynccontextmanager
 
 import sys
 from pathlib import Path
@@ -10,146 +10,199 @@ from pathlib import Path
 sys.path.insert(0, str(Path(__file__).parent / "src"))
 
 
+@pytest.fixture
+def mock_client():
+    return MagicMock()
+
+
+@pytest.fixture
+def mock_service_provider(mock_client):
+    provider_mock = MagicMock()
+    mock_response = MagicMock()
+    mock_response.is_error = False
+    mock_response.data = []
+
+    provider_mock.party.find_by_identifier.return_value = mock_response
+    provider_mock.party.create.return_value = mock_response
+    provider_mock.schedule.create.return_value = mock_response
+    provider_mock.service_center.find_all.return_value = mock_response
+    provider_mock.product.find_salable.return_value = mock_response
+
+    return provider_mock
+
+
+@pytest.fixture
+def server_with_mocks(mock_service_provider):
+    with patch("tryton_mcp.server._service_provider", mock_service_provider):
+        yield mock_service_provider
+
+
 @pytest.mark.asyncio
-class TestTrytonCall:
+class TestFindCustomerByIdentifier:
-    async def test_tryton_call_success(self, mock_settings):
+    async def test_find_customer_success(self, server_with_mocks):
-        from tryton_mcp.server import tryton_call
+        from tryton_mcp.server import find_customer_by_identifier
 
-        mock_client = mock_settings.get_client.return_value
+        server_with_mocks.party.find_by_identifier.return_value.data = [
-        mock_client.call.return_value = [{"id": 1, "name": "Test"}]
+            {"id": 1, "party": {"name": "Test Customer"}}
+        ]
 
-        result = tryton_call("model.test.read", [[1], ["name"]])
+        result = find_customer_by_identifier("12345")
 
-        assert result["success"] is True
+        assert result == [{"id": 1, "party": {"name": "Test Customer"}}]
-        assert result["data"] == [{"id": 1, "name": "Test"}]
+        server_with_mocks.party.find_by_identifier.assert_called_once_with("12345")
-        mock_client.call.assert_called_once_with("model.test.read", [[1], ["name"]])
 
-    async def test_tryton_call_failure(self, mock_settings):
+    async def test_find_customer_not_found(self, server_with_mocks):
-        from tryton_mcp.server import tryton_call
+        from tryton_mcp.server import find_customer_by_identifier
 
-        mock_client = mock_settings.get_client.return_value
+        server_with_mocks.party.find_by_identifier.return_value.is_error = True
-        mock_client.call.side_effect = Exception("Connection error")
 
-        result = tryton_call("model.test.read", [[1], ["name"]])
+        with pytest.raises(Exception, match="Customer with identifier"):
+            find_customer_by_identifier("invalid")
 
-        assert result["success"] is False
+
-        assert "Connection error" in result["error"]
+@pytest.mark.asyncio
+class TestCreateCustomer:
+    async def test_create_customer_success(self, server_with_mocks):
+        from tryton_mcp.server import create_customer
+
+        server_with_mocks.party.create.return_value.data = [1]
+
+        result = create_customer("New Customer", [])
+
+        assert result == [1]
+
+    async def test_create_customer_invalid_name(self, server_with_mocks):
+        from tryton_mcp.server import create_customer
+        from pydantic import ValidationError
+
+        with pytest.raises(ValidationError):
+            create_customer("", [])
 
 
 @pytest.mark.asyncio
 class TestCreateSchedule:
-    async def test_create_schedule_success(self, mcp_client, mock_settings):
+    async def test_create_schedule_success(self, server_with_mocks):
         from tryton_mcp.server import create_schedule
 
-        mock_client = mock_settings.get_client.return_value
+        server_with_mocks.schedule.create.return_value.data = [1]
-        mock_client.call.return_value = [1]
 
-        result = await mcp_client.call_tool(
+        result = create_schedule(
-            "create_schedule",
+            professional=6,
-            {
+            description="Test appointment",
-                "professional": 6,
+            customer=4,
-                "description": "Test appointment",
+            date="2026-03-15T10:00:00",
-                "customer": 4,
+            service_center=11,
-                "date": "2026-03-15T10:00:00",
-                "service_center": 11,
-            },
         )
 
-        assert result.content is not None
+        assert result == [1]
-        assert len(result.content) == 1
-        assert result.content[0].text == "[1]"
 
-        mock_client.call.assert_called_once()
+    async def test_create_schedule_failure(self, server_with_mocks):
-
-    async def test_create_schedule_failure(self, mcp_client, mock_settings):
         from tryton_mcp.server import create_schedule
 
-        mock_client = mock_settings.get_client.return_value
+        server_with_mocks.schedule.create.return_value.is_error = True
-        mock_client.call.side_effect = Exception("Create failed")
+        server_with_mocks.schedule.create.return_value.error = "Create failed"
 
         with pytest.raises(Exception, match="Failed to create schedule"):
-            await mcp_client.call_tool(
+            create_schedule(
-                "create_schedule",
+                professional=6,
-                {
+                description="Test appointment",
-                    "professional": 6,
+                customer=4,
-                    "description": "Test appointment",
+                date="2026-03-15T10:00:00",
-                    "customer": 4,
+                service_center=11,
-                    "date": "2026-03-15T10:00:00",
-                    "service_center": 11,
-                },
             )
 
-    async def test_create_schedule_invalid_date_format(self, mcp_client, mock_settings):
+    async def test_create_schedule_invalid_date_format(self, server_with_mocks):
-        with pytest.raises(ToolError, match="Invalid date format"):
+        from tryton_mcp.server import create_schedule
-            await mcp_client.call_tool(
+        from pydantic import ValidationError
-                "create_schedule",
+
-                {
+        with pytest.raises(ValidationError):
-                    "professional": 6,
+            create_schedule(
-                    "description": "Test appointment",
+                professional=6,
-                    "customer": 4,
+                description="Test appointment",
-                    "date": "invalid-date",
+                customer=4,
-                    "service_center": 11,
+                date="invalid-date",
-                },
+                service_center=11,
+            )
+
+    async def test_create_schedule_invalid_professional(self, server_with_mocks):
+        from tryton_mcp.server import create_schedule
+        from pydantic import ValidationError
+
+        with pytest.raises(ValidationError):
+            create_schedule(
+                professional=0,
+                description="Test appointment",
+                customer=4,
+                date="2026-03-15T10:00:00",
+                service_center=11,
             )
 
 
 @pytest.mark.asyncio
 class TestFindServiceCenters:
-    async def test_find_service_centers_success(self, mcp_client, mock_settings):
+    async def test_find_service_centers_success(self, server_with_mocks):
         from tryton_mcp.server import find_service_centers
 
-        mock_client = mock_settings.get_client.return_value
+        server_with_mocks.service_center.find_all.return_value.data = [
-        mock_client.call.return_value = [
             {"id": 11, "name": "Center 1", "address.street": "Street 1"}
         ]
 
-        result = await mcp_client.call_tool("find_service_centers", {})
+        result = find_service_centers()
 
-        result_data = json.loads(result.content[0].text)
+        assert result == [{"id": 11, "name": "Center 1", "address.street": "Street 1"}]
-        assert result_data == [
+        server_with_mocks.service_center.find_all.assert_called_once_with(
-            {"id": 11, "name": "Center 1", "address.street": "Street 1"}
+            offset=0, limit=None
-        ]
+        )
-        call_args = mock_client.call.call_args[0]
-        assert call_args[0] == "model.naliia.service_center.search_read"
-        assert call_args[1][0] == [[]]
 
-    async def test_find_service_centers_failure(self, mcp_client, mock_settings):
+    async def test_find_service_centers_with_pagination(self, server_with_mocks):
         from tryton_mcp.server import find_service_centers
 
-        mock_client = mock_settings.get_client.return_value
+        find_service_centers(offset=10, limit=5)
-        mock_client.call.side_effect = Exception("Search failed")
+
+        server_with_mocks.service_center.find_all.assert_called_once_with(
+            offset=10, limit=5
+        )
+
+    async def test_find_service_centers_failure(self, server_with_mocks):
+        from tryton_mcp.server import find_service_centers
+
+        server_with_mocks.service_center.find_all.return_value.is_error = True
+        server_with_mocks.service_center.find_all.return_value.error = "Search failed"
 
         with pytest.raises(Exception, match="Failed to find service centers"):
-            await mcp_client.call_tool("find_service_centers", {})
+            find_service_centers()
 
 
 @pytest.mark.asyncio
 class TestFindProductsAndServices:
-    async def test_find_products_and_services_success(self, mcp_client, mock_settings):
+    async def test_find_products_and_services_success(self, server_with_mocks):
         from tryton_mcp.server import find_products_and_services
 
-        mock_client = mock_settings.get_client.return_value
+        server_with_mocks.product.find_salable.return_value.data = [
-        mock_client.call.return_value = [
             {"id": 1, "name": "Product 1", "list_price": 100.0}
         ]
 
-        result = await mcp_client.call_tool("find_products_and_services", {})
+        result = find_products_and_services()
 
-        result_data = json.loads(result.content[0].text)
+        assert result == [{"id": 1, "name": "Product 1", "list_price": 100.0}]
-        assert result_data == [{"id": 1, "name": "Product 1", "list_price": 100.0}]
+        server_with_mocks.product.find_salable.assert_called_once_with(
+            offset=0, limit=None
+        )
 
-        mock_client.call.assert_called_once()
+    async def test_find_products_with_pagination(self, server_with_mocks):
-
-        call_args = mock_client.call.call_args[0]
-
-        assert call_args[0] == "model.product.product.search_read"
-        assert call_args[1][0] == [["active", "=", True], ["salable", "=", True]]
-
-    async def test_find_products_and_services_failure(self, mcp_client, mock_settings):
         from tryton_mcp.server import find_products_and_services
 
-        mock_client = mock_settings.get_client.return_value
+        find_products_and_services(offset=5, limit=10)
-        mock_client.call.side_effect = Exception("Search failed")
+
+        server_with_mocks.product.find_salable.assert_called_once_with(
+            offset=5, limit=10
+        )
+
+    async def test_find_products_failure(self, server_with_mocks):
+        from tryton_mcp.server import find_products_and_services
+
+        server_with_mocks.product.find_salable.return_value.is_error = True
+        server_with_mocks.product.find_salable.return_value.error = "Search failed"
 
         with pytest.raises(Exception, match="Failed to find products"):
-            await mcp_client.call_tool("find_products_and_services", {})
+            find_products_and_services()