Phase 9: Main Client Class - Complete implementation

✅ Main Client Class Implementation:
- Created pathao/client.py with PathaoClient class
- Unified API interface for all Pathao services
- Flexible credential management (parameters + environment variables)
- Environment support (sandbox/production) with automatic URL configuration
- Complete service module integration (stores, orders, locations, prices)

✅ Features:
- Credential loading from parameters or environment variables with precedence
- Environment validation (sandbox/production) with proper base URL setting
- Shared HTTP client and authentication across all modules
- Public methods for token management (get_access_token, refresh_token, is_token_valid)
- Comprehensive credential validation with ConfigurationError

✅ Service Integration:
- Store management module (client.stores)
- Order management module (client.orders)
- Location services module (client.locations)
- Price calculation module (client.prices)
- Consistent initialization and dependency injection

✅ Test Coverage:
- Created tests/test_client.py with 11 comprehensive tests
- All initialization scenarios covered (parameters, environment, mixed)
- Environment validation and credential handling tested
- Module initialization and dependency injection verified
- 100% test pass rate (11/11 tests passing)

✅ Code Quality:
- Applied Black formatting for consistent code style
- Fixed flake8 linting issues (line length)
- Clean, minimal implementation following best practices

✅ Progress: 9/17 phases complete (52.9%)
- All 194 tests passing across entire codebase
- Updated implementation checklist with completion status

Author: mojnomiya

pathao/client.py

@@ -0,0 +1,94 @@
+"""Main client class for Pathao Python SDK."""
+
+import os
+from typing import Optional
+
+from .exceptions import ConfigurationError
+from .http_client import HTTPClient
+from .modules.auth import AuthModule
+from .modules.store import StoreModule
+from .modules.order import OrderModule
+from .modules.location import LocationModule
+from .modules.price import PriceModule
+
+
+class PathaoClient:
+    """Main client for Pathao API."""
+
+    def __init__(
+        self,
+        client_id: Optional[str] = None,
+        client_secret: Optional[str] = None,
+        username: Optional[str] = None,
+        password: Optional[str] = None,
+        environment: str = "sandbox",
+    ):
+        """Initialize Pathao client."""
+        # Load credentials
+        credentials = self._load_credentials(
+            client_id, client_secret, username, password
+        )
+
+        # Validate environment
+        if environment not in ["sandbox", "production"]:
+            raise ConfigurationError(
+                "Invalid environment. Must be 'sandbox' or 'production'",
+                missing_config="environment",
+            )
+
+        # Set base URL
+        base_url = (
+            "https://courier-api.pathao.com"
+            if environment == "production"
+            else "https://courier-api-sandbox.pathao.com"
+        )
+
+        # Initialize HTTP client
+        self.http_client = HTTPClient(base_url)
+
+        # Initialize auth module
+        self.auth_module = AuthModule(self.http_client, credentials)
+
+        # Initialize service modules
+        self.stores = StoreModule(self.http_client, self.auth_module)
+        self.orders = OrderModule(self.http_client, self.auth_module)
+        self.locations = LocationModule(self.http_client, self.auth_module)
+        self.prices = PriceModule(self.http_client, self.auth_module)
+
+    def _load_credentials(
+        self,
+        client_id: Optional[str],
+        client_secret: Optional[str],
+        username: Optional[str],
+        password: Optional[str],
+    ) -> dict:
+        """Load credentials from parameters or environment."""
+        # Try parameters first, then environment variables
+        credentials = {
+            "client_id": client_id or os.getenv("PATHAO_CLIENT_ID"),
+            "client_secret": client_secret or os.getenv("PATHAO_CLIENT_SECRET"),
+            "username": username or os.getenv("PATHAO_USERNAME"),
+            "password": password or os.getenv("PATHAO_PASSWORD"),
+        }
+
+        # Validate required credentials
+        missing = [k for k, v in credentials.items() if not v]
+        if missing:
+            raise ConfigurationError(
+                f"Missing required credentials: {', '.join(missing)}",
+                missing_config=missing[0],
+            )
+
+        return credentials
+
+    def get_access_token(self) -> str:
+        """Get current access token."""
+        return self.auth_module.get_access_token()
+
+    def refresh_token(self) -> None:
+        """Refresh access token."""
+        self.auth_module.refresh_token()
+
+    def is_token_valid(self) -> bool:
+        """Check if current token is valid."""
+        return self.auth_module.is_token_valid()

pathao_implementation_checklist.md

@@ -564,30 +564,83 @@
 
 ---
 
-## Phase 9: Main Client Class
+## Phase 9: Main Client Class ✅
 
 ### 9.1 PathaoClient Implementation
 
-- [ ] **client.py**
-  - [ ] `PathaoClient` class
-    - [ ] `__init__()` method
-      - [ ] Load credentials from parameters or .env
-      - [ ] Validate environment (sandbox/production)
-      - [ ] Initialize HTTPClient
-      - [ ] Initialize AuthModule
-      - [ ] Validate credentials
-    - [ ] Properties:
-      - [ ] `stores` → StoreModule
-      - [ ] `orders` → OrderModule
-      - [ ] `locations` → LocationModule
-      - [ ] `prices` → PriceModule
-    - [ ] Public methods:
-      - [ ] `get_access_token() -> str`
-      - [ ] `refresh_token() -> None`
-      - [ ] `is_token_valid() -> bool`
-    - [ ] Private methods:
-      - [ ] `_load_credentials_from_env() -> dict`
-      - [ ] `_validate_credentials() -> None`
+- [x] **client.py**
+  - [x] `PathaoClient` class
+    - [x] `__init__()` method
+      - [x] Load credentials from parameters or environment variables
+      - [x] Validate environment (sandbox/production)
+      - [x] Initialize HTTPClient with correct base URL
+      - [x] Initialize AuthModule with credentials
+      - [x] Initialize all service modules (stores, orders, locations, prices)
+      - [x] Validate all required credentials
+    - [x] Properties and methods:
+      - [x] `stores` → StoreModule instance
+      - [x] `orders` → OrderModule instance
+      - [x] `locations` → LocationModule instance
+      - [x] `prices` → PriceModule instance
+    - [x] Public methods:
+      - [x] `get_access_token() -> str`
+      - [x] `refresh_token() -> None`
+      - [x] `is_token_valid() -> bool`
+    - [x] Private methods:
+      - [x] `_load_credentials()` from parameters or environment
+
+**Credential Management:**
+- [x] Support for parameter-based credentials
+- [x] Support for environment variable credentials
+- [x] Mixed credential sources (parameters override environment)
+- [x] Comprehensive validation with ConfigurationError
+
+**Environment Support:**
+- [x] Sandbox environment (https://courier-api-sandbox.pathao.com)
+- [x] Production environment (https://courier-api.pathao.com)
+- [x] Environment validation with proper error handling
+
+**Test coverage:**
+- [x] Initialization with parameters
+- [x] Initialization with environment variables
+- [x] Mixed credential sources
+- [x] Environment validation (sandbox/production)
+- [x] Missing credentials handling
+- [x] Module initialization verification
+- [x] Public method delegation
+
+### 9.2 Main Client Features
+
+- [x] **Unified API interface**
+  - [x] Single entry point for all Pathao services
+  - [x] Consistent initialization across all modules
+  - [x] Shared HTTP client and authentication
+  - [x] Clean separation of concerns
+
+- [x] **Flexible credential management**
+  - [x] Parameter-based credentials for direct usage
+  - [x] Environment variable support for deployment
+  - [x] Mixed sources with parameter precedence
+  - [x] Comprehensive validation and error reporting
+
+- [x] **Environment management**
+  - [x] Sandbox environment for testing
+  - [x] Production environment for live usage
+  - [x] Automatic base URL configuration
+  - [x] Environment validation
+
+- [x] **Service module integration**
+  - [x] Store management (create, list, get)
+  - [x] Order management (create, bulk, track)
+  - [x] Location services (cities, zones, areas)
+  - [x] Price calculation (delivery pricing)
+
+- [x] **Comprehensive test suite (11 tests, 100% pass)**
+  - [x] Initialization scenarios (parameters, environment, mixed)
+  - [x] Environment validation and URL configuration
+  - [x] Credential validation and error handling
+  - [x] Module initialization and dependency injection
+  - [x] Public method delegation to auth module() -> None`
       - [ ] `_get_base_url() -> str`
       - [ ] `_initialize_modules() -> None`
 

tests/test_client.py

@@ -0,0 +1,165 @@
+"""Tests for main client class."""
+
+import pytest
+from unittest.mock import Mock, patch
+
+from pathao.client import PathaoClient
+from pathao.exceptions import ConfigurationError
+
+
+class TestPathaoClient:
+    """Test cases for PathaoClient."""
+
+    def test_init_with_parameters(self):
+        """Test client initialization with parameters."""
+        client = PathaoClient(
+            client_id="test_id",
+            client_secret="test_secret",
+            username="test_user",
+            password="test_pass",
+            environment="sandbox",
+        )
+
+        assert client.http_client.base_url == "https://courier-api-sandbox.pathao.com"
+        assert hasattr(client, "stores")
+        assert hasattr(client, "orders")
+        assert hasattr(client, "locations")
+        assert hasattr(client, "prices")
+
+    def test_init_production_environment(self):
+        """Test client initialization with production environment."""
+        client = PathaoClient(
+            client_id="test_id",
+            client_secret="test_secret",
+            username="test_user",
+            password="test_pass",
+            environment="production",
+        )
+
+        assert client.http_client.base_url == "https://courier-api.pathao.com"
+
+    def test_init_invalid_environment(self):
+        """Test client initialization with invalid environment."""
+        with pytest.raises(ConfigurationError) as exc_info:
+            PathaoClient(
+                client_id="test_id",
+                client_secret="test_secret",
+                username="test_user",
+                password="test_pass",
+                environment="invalid",
+            )
+        assert "Invalid environment" in str(exc_info.value)
+
+    @patch.dict(
+        "os.environ",
+        {
+            "PATHAO_CLIENT_ID": "env_id",
+            "PATHAO_CLIENT_SECRET": "env_secret",
+            "PATHAO_USERNAME": "env_user",
+            "PATHAO_PASSWORD": "env_pass",
+        },
+    )
+    def test_init_with_environment_variables(self):
+        """Test client initialization with environment variables."""
+        client = PathaoClient()
+
+        assert client.auth_module.credentials["client_id"] == "env_id"
+        assert client.auth_module.credentials["username"] == "env_user"
+
+    def test_init_missing_credentials(self):
+        """Test client initialization with missing credentials."""
+        with pytest.raises(ConfigurationError) as exc_info:
+            PathaoClient()
+        assert "Missing required credentials" in str(exc_info.value)
+
+    def test_init_partial_credentials(self):
+        """Test client initialization with partial credentials."""
+        with pytest.raises(ConfigurationError) as exc_info:
+            PathaoClient(client_id="test_id", username="test_user")
+        assert "client_secret" in str(exc_info.value) or "password" in str(
+            exc_info.value
+        )
+
+    def test_get_access_token(self):
+        """Test get access token method."""
+        client = PathaoClient(
+            client_id="test_id",
+            client_secret="test_secret",
+            username="test_user",
+            password="test_pass",
+        )
+
+        # Mock the auth module
+        client.auth_module.get_access_token = Mock(return_value="test_token")
+
+        token = client.get_access_token()
+        assert token == "test_token"
+        client.auth_module.get_access_token.assert_called_once()
+
+    def test_refresh_token(self):
+        """Test refresh token method."""
+        client = PathaoClient(
+            client_id="test_id",
+            client_secret="test_secret",
+            username="test_user",
+            password="test_pass",
+        )
+
+        # Mock the auth module
+        client.auth_module.refresh_token = Mock()
+
+        client.refresh_token()
+        client.auth_module.refresh_token.assert_called_once()
+
+    def test_is_token_valid(self):
+        """Test is token valid method."""
+        client = PathaoClient(
+            client_id="test_id",
+            client_secret="test_secret",
+            username="test_user",
+            password="test_pass",
+        )
+
+        # Mock the auth module
+        client.auth_module.is_token_valid = Mock(return_value=True)
+
+        is_valid = client.is_token_valid()
+        assert is_valid is True
+        client.auth_module.is_token_valid.assert_called_once()
+
+    def test_module_initialization(self):
+        """Test that all modules are properly initialized."""
+        client = PathaoClient(
+            client_id="test_id",
+            client_secret="test_secret",
+            username="test_user",
+            password="test_pass",
+        )
+
+        # Check that all modules are initialized with correct dependencies
+        assert client.stores.http_client == client.http_client
+        assert client.stores.auth_module == client.auth_module
+
+        assert client.orders.http_client == client.http_client
+        assert client.orders.auth_module == client.auth_module
+
+        assert client.locations.http_client == client.http_client
+        assert client.locations.auth_module == client.auth_module
+
+        assert client.prices.http_client == client.http_client
+        assert client.prices.auth_module == client.auth_module
+
+    @patch.dict(
+        "os.environ",
+        {
+            "PATHAO_CLIENT_ID": "env_id",
+            "PATHAO_CLIENT_SECRET": "env_secret",
+            "PATHAO_USERNAME": "env_user",
+        },
+    )
+    def test_init_mixed_credentials(self):
+        """Test client initialization with mixed credentials."""
+        client = PathaoClient(password="param_pass")
+
+        assert client.auth_module.credentials["client_id"] == "env_id"
+        assert client.auth_module.credentials["password"] == "param_pass"