Implement Task Manager API with FastAPI and SQLite

README.md

@@ -1,3 +1,146 @@
-# FastAPI Application
+# Task Manager API
 
-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A robust RESTful API for managing tasks, built with FastAPI and SQLite.
+
+## Features
+
+- **User Authentication**: Secure registration and login with JWT tokens
+- **Task Management**: Complete CRUD operations for tasks
+- **Task Filtering**: Filter tasks by status, priority, and search terms
+- **Health Monitoring**: Endpoint for application health checking
+- **API Documentation**: Interactive documentation with Swagger UI and ReDoc
+- **Database Migrations**: Easy database schema management with Alembic
+
+## Tech Stack
+
+- **FastAPI**: Modern, fast web framework for building APIs
+- **SQLAlchemy**: SQL toolkit and ORM
+- **Alembic**: Database migration tool
+- **Pydantic**: Data validation and settings management
+- **SQLite**: Lightweight, file-based database
+- **JWT**: JSON Web Tokens for secure authentication
+- **Ruff**: Fast Python linter for code quality
+
+## Project Structure
+
+```
+task-manager-api/
+├── alembic.ini                # Alembic configuration
+├── main.py                    # Application entry point
+├── pyproject.toml             # Project configuration
+├── requirements.txt           # Project dependencies
+├── app/                       # Application package
+│   ├── api/                   # API endpoints
+│   │   ├── deps.py            # API dependencies
+│   │   └── v1/                # API version 1
+│   │       ├── api.py         # API router
+│   │       └── endpoints/     # API endpoint modules
+│   │           ├── auth.py    # Authentication endpoints
+│   │           ├── tasks.py   # Task management endpoints
+│   │           └── users.py   # User management endpoints
+│   ├── core/                  # Core modules
+│   │   ├── config.py          # Application configuration
+│   │   └── security.py        # Security utilities
+│   ├── crud/                  # CRUD operations
+│   │   ├── base.py            # Base CRUD class
+│   │   ├── task.py            # Task CRUD operations
+│   │   └── user.py            # User CRUD operations
+│   ├── db/                    # Database configuration
+│   │   └── database.py        # Database setup
+│   ├── models/                # SQLAlchemy models
+│   │   ├── task.py            # Task model
+│   │   └── user.py            # User model
+│   └── schemas/               # Pydantic schemas
+│       ├── task.py            # Task schemas
+│       └── user.py            # User schemas
+└── migrations/                # Alembic migrations
+    ├── env.py                 # Alembic environment
+    ├── script.py.mako         # Alembic script template
+    └── versions/              # Migration versions
+```
+
+## Installation
+
+1. Clone the repository:
+```bash
+git clone <repository-url>
+cd task-manager-api
+```
+
+2. Install dependencies:
+```bash
+pip install -r requirements.txt
+```
+
+3. Run database migrations:
+```bash
+alembic upgrade head
+```
+
+4. Start the application:
+```bash
+uvicorn main:app --reload
+```
+
+## API Documentation
+
+Once the application is running, you can access:
+- Swagger UI: http://localhost:8000/docs
+- ReDoc: http://localhost:8000/redoc
+- OpenAPI Schema: http://localhost:8000/openapi.json
+
+## Environment Variables
+
+The application uses the following environment variables:
+
+- `SECRET_KEY`: Secret key for JWT tokens (default: "changethisinproduction")
+- `ACCESS_TOKEN_EXPIRE_MINUTES`: Token expiration time in minutes (default: 30)
+- `API_V1_STR`: API version prefix (default: "/api/v1")
+
+## Usage Examples
+
+### Authentication
+
+```bash
+# Register a new user
+curl -X POST "http://localhost:8000/api/v1/auth/register" \
+     -H "Content-Type: application/json" \
+     -d '{"email": "user@example.com", "username": "testuser", "password": "Password123"}'
+
+# Login and get access token
+curl -X POST "http://localhost:8000/api/v1/auth/login" \
+     -H "Content-Type: application/x-www-form-urlencoded" \
+     -d "username=user@example.com&password=Password123"
+```
+
+### Task Management
+
+```bash
+# Create a new task (requires authentication)
+curl -X POST "http://localhost:8000/api/v1/tasks" \
+     -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
+     -H "Content-Type: application/json" \
+     -d '{"title": "Complete project", "description": "Finish the API project", "priority": "high", "due_date": "2023-12-31T23:59:59"}'
+
+# Get all tasks
+curl -X GET "http://localhost:8000/api/v1/tasks" \
+     -H "Authorization: Bearer YOUR_ACCESS_TOKEN"
+
+# Get a specific task
+curl -X GET "http://localhost:8000/api/v1/tasks/1" \
+     -H "Authorization: Bearer YOUR_ACCESS_TOKEN"
+
+# Update a task
+curl -X PUT "http://localhost:8000/api/v1/tasks/1" \
+     -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
+     -H "Content-Type: application/json" \
+     -d '{"status": "in_progress"}'
+
+# Delete a task
+curl -X DELETE "http://localhost:8000/api/v1/tasks/1" \
+     -H "Authorization: Bearer YOUR_ACCESS_TOKEN"
+```
+
+## License
+
+This project is licensed under the MIT License - see the LICENSE file for details.

alembic.ini

@@ -0,0 +1,85 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = migrations
+
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# timezone to use when rendering the date
+# within the migration file as well as the filename.
+# string value is passed to dateutil.tz.gettz()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the
+# "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; this defaults
+# to migrations/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path
+# version_locations = %(here)s/bar %(here)s/bat migrations/versions
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# SQLite URL with absolute path
+sqlalchemy.url = sqlite:////app/storage/db/db.sqlite
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks=black
+# black.type=console_scripts
+# black.entrypoint=black
+# black.options=-l 79
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

app/api/deps.py

@@ -0,0 +1,69 @@
+"""
+API dependencies
+"""
+
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from jose import jwt
+from pydantic import ValidationError
+from sqlalchemy.orm import Session
+
+from app import crud, models, schemas
+from app.core.config import settings
+from app.db.database import get_db
+
+# OAuth2 scheme for token authentication
+oauth2_scheme = OAuth2PasswordBearer(
+    tokenUrl=f"{settings.API_V1_STR}/auth/login"
+)
+
+def get_current_user(
+    db: Session = Depends(get_db), token: str = Depends(oauth2_scheme)
+) -> models.User:
+    """
+    Dependency to get the current authenticated user
+    """
+    try:
+        payload = jwt.decode(
+            token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM]
+        )
+        token_data = schemas.TokenPayload(**payload)
+    except (jwt.JWTError, ValidationError):
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Could not validate credentials",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    user = crud.user.get(db, id=token_data.sub)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found"
+        )
+    return user
+
+def get_current_active_user(
+    current_user: models.User = Depends(get_current_user),
+) -> models.User:
+    """
+    Dependency to get the current active user
+    """
+    if not crud.user.is_active(current_user):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Inactive user"
+        )
+    return current_user
+
+def get_current_active_superuser(
+    current_user: models.User = Depends(get_current_user),
+) -> models.User:
+    """
+    Dependency to get the current active superuser
+    """
+    if not crud.user.is_superuser(current_user):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="The user doesn't have enough privileges"
+        )
+    return current_user

app/api/v1/api.py

@@ -0,0 +1,13 @@
+"""
+API v1 router
+"""
+from fastapi import APIRouter
+
+from app.api.v1.endpoints import auth, tasks, users
+
+api_router = APIRouter()
+
+# Include routers for different endpoints
+api_router.include_router(auth.router, prefix="/auth", tags=["Authentication"])
+api_router.include_router(tasks.router, prefix="/tasks", tags=["Tasks"])
+api_router.include_router(users.router, prefix="/users", tags=["Users"])

app/api/v1/endpoints/auth.py

@@ -0,0 +1,77 @@
+"""
+Authentication endpoints
+"""
+from datetime import timedelta
+from typing import Any
+
+from app import crud, models, schemas
+from app.api import deps
+from app.core import security
+from app.core.config import settings
+from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordRequestForm
+from sqlalchemy.orm import Session
+
+router = APIRouter()
+
+@router.post("/login", response_model=schemas.Token)
+def login_access_token(
+    db: Session = Depends(deps.get_db), form_data: OAuth2PasswordRequestForm = Depends()
+) -> Any:
+    """
+    OAuth2 compatible token login, get an access token for future requests
+    """
+    user = crud.user.authenticate(
+        db, email=form_data.username, password=form_data.password
+    )
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect email or password",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    if not crud.user.is_active(user):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Inactive user"
+        )
+    access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
+    return {
+        "access_token": security.create_access_token(
+            user.id, expires_delta=access_token_expires
+        ),
+        "token_type": "bearer",
+    }
+
+@router.post("/register", response_model=schemas.User)
+def register_user(
+    *,
+    db: Session = Depends(deps.get_db),
+    user_in: schemas.UserCreate,
+) -> Any:
+    """
+    Register a new user
+    """
+    user = crud.user.get_by_email(db, email=user_in.email)
+    if user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A user with this email already exists",
+        )
+    user = crud.user.get_by_username(db, username=user_in.username)
+    if user:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A user with this username already exists",
+        )
+    user = crud.user.create(db, obj_in=user_in)
+    return user
+
+@router.get("/me", response_model=schemas.User)
+def read_users_me(
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Get current user
+    """
+    return current_user

app/api/v1/endpoints/tasks.py

@@ -0,0 +1,141 @@
+"""
+Task management endpoints
+"""
+from datetime import datetime
+from typing import Any, List, Optional
+
+from app import crud, models, schemas
+from app.api import deps
+from app.models.task import TaskPriority, TaskStatus
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+router = APIRouter()
+
+@router.post("", response_model=schemas.Task)
+def create_task(
+    *,
+    db: Session = Depends(deps.get_db),
+    task_in: schemas.TaskCreate,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Create a new task
+    """
+    task = crud.task.create_with_owner(db=db, obj_in=task_in, owner_id=current_user.id)
+    return task
+
+@router.get("", response_model=List[schemas.Task])
+def read_tasks(
+    db: Session = Depends(deps.get_db),
+    skip: int = 0,
+    limit: int = 100,
+    status: Optional[TaskStatus] = None,
+    priority: Optional[TaskPriority] = None,
+    search: Optional[str] = None,
+    start_date: Optional[datetime] = None,
+    end_date: Optional[datetime] = None,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Retrieve tasks with filtering options
+    """
+    if status:
+        tasks = crud.task.get_multi_by_owner_and_status(
+            db=db, owner_id=current_user.id, status=status, skip=skip, limit=limit
+        )
+    elif priority:
+        tasks = crud.task.get_multi_by_owner_and_priority(
+            db=db, owner_id=current_user.id, priority=priority, skip=skip, limit=limit
+        )
+    elif search:
+        tasks = crud.task.get_multi_by_owner_and_search(
+            db=db, owner_id=current_user.id, search=search, skip=skip, limit=limit
+        )
+    elif start_date and end_date:
+        tasks = crud.task.get_multi_by_owner_and_due_date_range(
+            db=db, owner_id=current_user.id, start_date=start_date, end_date=end_date,
+            skip=skip, limit=limit
+        )
+    else:
+        tasks = crud.task.get_multi_by_owner(
+            db=db, owner_id=current_user.id, skip=skip, limit=limit
+        )
+    return tasks
+
+@router.get("/{id}", response_model=schemas.Task)
+def read_task(
+    *,
+    db: Session = Depends(deps.get_db),
+    id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Get task by ID
+    """
+    task = crud.task.get_by_id_and_owner(db=db, id=id, owner_id=current_user.id)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Task not found"
+        )
+    return task
+
+@router.put("/{id}", response_model=schemas.Task)
+def update_task(
+    *,
+    db: Session = Depends(deps.get_db),
+    id: int,
+    task_in: schemas.TaskUpdate,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Update a task
+    """
+    task = crud.task.get_by_id_and_owner(db=db, id=id, owner_id=current_user.id)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Task not found"
+        )
+    task = crud.task.update(db=db, db_obj=task, obj_in=task_in)
+    return task
+
+@router.patch("/{id}/status", response_model=schemas.Task)
+def update_task_status(
+    *,
+    db: Session = Depends(deps.get_db),
+    id: int,
+    status: TaskStatus,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Update a task status
+    """
+    task = crud.task.get_by_id_and_owner(db=db, id=id, owner_id=current_user.id)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Task not found"
+        )
+    task = crud.task.update_status(db=db, db_obj=task, status=status)
+    return task
+
+@router.delete("/{id}", response_model=schemas.Task)
+def delete_task(
+    *,
+    db: Session = Depends(deps.get_db),
+    id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Delete a task (soft delete)
+    """
+    task = crud.task.get_by_id_and_owner(db=db, id=id, owner_id=current_user.id)
+    if not task:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Task not found"
+        )
+    task = crud.task.soft_delete(db=db, db_obj=task)
+    return task

app/api/v1/endpoints/users.py

@@ -0,0 +1,77 @@
+"""
+User management endpoints
+"""
+from typing import Any, List
+
+from app import crud, models, schemas
+from app.api import deps
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+router = APIRouter()
+
+@router.get("", response_model=List[schemas.User])
+def read_users(
+    db: Session = Depends(deps.get_db),
+    skip: int = 0,
+    limit: int = 100,
+    current_user: models.User = Depends(deps.get_current_active_superuser),
+) -> Any:
+    """
+    Retrieve users (superuser only)
+    """
+    users = crud.user.get_multi(db, skip=skip, limit=limit)
+    return users
+
+@router.get("/{user_id}", response_model=schemas.User)
+def read_user(
+    user_id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+    db: Session = Depends(deps.get_db),
+) -> Any:
+    """
+    Get a specific user by id
+    """
+    user = crud.user.get(db, id=user_id)
+    if user == current_user:
+        return user
+    if not crud.user.is_superuser(current_user):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="The user doesn't have enough privileges"
+        )
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="User not found"
+        )
+    return user
+
+@router.put("/me", response_model=schemas.User)
+def update_user_me(
+    *,
+    db: Session = Depends(deps.get_db),
+    user_in: schemas.UserUpdate,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Update own user
+    """
+    if user_in.username is not None:
+        user_with_username = crud.user.get_by_username(db, username=user_in.username)
+        if user_with_username and user_with_username.id != current_user.id:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="Username already registered"
+            )
+    
+    if user_in.email is not None:
+        user_with_email = crud.user.get_by_email(db, email=user_in.email)
+        if user_with_email and user_with_email.id != current_user.id:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="Email already registered"
+            )
+    
+    user = crud.user.update(db, db_obj=current_user, obj_in=user_in)
+    return user

app/core/config.py

@@ -0,0 +1,37 @@
+"""
+Application configuration from environment variables
+"""
+import os
+from pathlib import Path
+from typing import List
+
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    """
+    Application settings from environment variables
+    """
+    API_V1_STR: str = "/api/v1"
+    PROJECT_NAME: str = "Task Manager API"
+    
+    # CORS settings
+    BACKEND_CORS_ORIGINS: List[str] = ["*"]
+    
+    # Security settings
+    SECRET_KEY: str = os.getenv("SECRET_KEY", "changethisinproduction")
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
+    
+    # Database settings
+    DB_DIR: Path = Path("/app") / "storage" / "db"
+    DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
+    
+    class Config:
+        """Pydantic config class"""
+        env_file = ".env"
+        env_file_encoding = "utf-8"
+        case_sensitive = True
+
+# Create global settings object
+settings = Settings()

app/core/security.py

@@ -0,0 +1,43 @@
+"""
+Security utilities for authentication and authorization
+"""
+from datetime import datetime, timedelta
+from typing import Any, Optional, Union
+
+from jose import jwt
+from passlib.context import CryptContext
+
+from app.core.config import settings
+
+# Password context for hashing and verification
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+def create_access_token(
+    subject: Union[str, Any], expires_delta: Optional[timedelta] = None
+) -> str:
+    """
+    Create a JWT access token
+    """
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(
+            minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
+        )
+    to_encode = {"exp": expire, "sub": str(subject)}
+    encoded_jwt = jwt.encode(
+        to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM
+    )
+    return encoded_jwt
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    """
+    Verify a password against a hash
+    """
+    return pwd_context.verify(plain_password, hashed_password)
+
+def get_password_hash(password: str) -> str:
+    """
+    Hash a password
+    """
+    return pwd_context.hash(password)

app/crud/__init__.py

@@ -0,0 +1,5 @@
+"""
+Import CRUD operations for easier access
+"""
+from app.crud.task import task
+from app.crud.user import user

app/crud/base.py

@@ -0,0 +1,85 @@
+"""
+Base CRUD class with common operations
+"""
+from typing import Any, Dict, Generic, List, Optional, Type, TypeVar, Union
+
+from fastapi.encoders import jsonable_encoder
+from pydantic import BaseModel
+from sqlalchemy.orm import Session
+
+from app.db.database import Base
+
+ModelType = TypeVar("ModelType", bound=Base)
+CreateSchemaType = TypeVar("CreateSchemaType", bound=BaseModel)
+UpdateSchemaType = TypeVar("UpdateSchemaType", bound=BaseModel)
+
+
+class CRUDBase(Generic[ModelType, CreateSchemaType, UpdateSchemaType]):
+    """
+    Base CRUD class with standard methods
+    """
+    def __init__(self, model: Type[ModelType]):
+        """
+        CRUD object with default methods to Create, Read, Update, Delete (CRUD).
+        
+        Args:
+            model: A SQLAlchemy model class
+        """
+        self.model = model
+
+    def get(self, db: Session, id: Any) -> Optional[ModelType]:
+        """
+        Get object by ID
+        """
+        return db.query(self.model).filter(self.model.id == id).first()
+
+    def get_multi(
+        self, db: Session, *, skip: int = 0, limit: int = 100
+    ) -> List[ModelType]:
+        """
+        Get multiple objects with pagination
+        """
+        return db.query(self.model).offset(skip).limit(limit).all()
+
+    def create(self, db: Session, *, obj_in: CreateSchemaType) -> ModelType:
+        """
+        Create a new object
+        """
+        obj_in_data = jsonable_encoder(obj_in)
+        db_obj = self.model(**obj_in_data)
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def update(
+        self,
+        db: Session,
+        *,
+        db_obj: ModelType,
+        obj_in: Union[UpdateSchemaType, Dict[str, Any]]
+    ) -> ModelType:
+        """
+        Update an object
+        """
+        obj_data = jsonable_encoder(db_obj)
+        if isinstance(obj_in, dict):
+            update_data = obj_in
+        else:
+            update_data = obj_in.model_dump(exclude_unset=True)
+        for field in obj_data:
+            if field in update_data:
+                setattr(db_obj, field, update_data[field])
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def remove(self, db: Session, *, id: int) -> ModelType:
+        """
+        Remove an object
+        """
+        obj = db.query(self.model).get(id)
+        db.delete(obj)
+        db.commit()
+        return obj

app/crud/task.py

@@ -0,0 +1,179 @@
+"""
+CRUD operations for tasks
+"""
+from datetime import datetime
+from typing import List, Optional
+
+from sqlalchemy import or_
+from sqlalchemy.orm import Session
+
+from app.crud.base import CRUDBase
+from app.models.task import Task, TaskPriority, TaskStatus
+from app.schemas.task import TaskCreate, TaskUpdate
+
+
+class CRUDTask(CRUDBase[Task, TaskCreate, TaskUpdate]):
+    """
+    CRUD operations for Task model
+    """
+    def create_with_owner(
+        self, db: Session, *, obj_in: TaskCreate, owner_id: int
+    ) -> Task:
+        """
+        Create a new task with owner
+        """
+        db_obj = Task(
+            title=obj_in.title,
+            description=obj_in.description,
+            status=obj_in.status,
+            priority=obj_in.priority,
+            due_date=obj_in.due_date,
+            owner_id=owner_id,
+            created_at=datetime.utcnow(),
+            updated_at=datetime.utcnow(),
+            is_deleted=False,
+        )
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def get_multi_by_owner(
+        self, db: Session, *, owner_id: int, skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        """
+        Get multiple tasks by owner with pagination
+        """
+        return (
+            db.query(self.model)
+            .filter(Task.owner_id == owner_id, not Task.is_deleted)
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+    
+    def get_multi_by_owner_and_status(
+        self, db: Session, *, owner_id: int, status: TaskStatus, 
+        skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        """
+        Get multiple tasks by owner and status with pagination
+        """
+        return (
+            db.query(self.model)
+            .filter(
+                Task.owner_id == owner_id,
+                Task.status == status,
+                not Task.is_deleted
+            )
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+    
+    def get_multi_by_owner_and_priority(
+        self, db: Session, *, owner_id: int, priority: TaskPriority, 
+        skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        """
+        Get multiple tasks by owner and priority with pagination
+        """
+        return (
+            db.query(self.model)
+            .filter(
+                Task.owner_id == owner_id,
+                Task.priority == priority,
+                not Task.is_deleted
+            )
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+    
+    def get_multi_by_owner_and_search(
+        self, db: Session, *, owner_id: int, search: str, 
+        skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        """
+        Get multiple tasks by owner and search term with pagination
+        """
+        search_pattern = f"%{search}%"
+        return (
+            db.query(self.model)
+            .filter(
+                Task.owner_id == owner_id,
+                or_(
+                    Task.title.ilike(search_pattern),
+                    Task.description.ilike(search_pattern)
+                ),
+                not Task.is_deleted
+            )
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+    
+    def get_multi_by_owner_and_due_date_range(
+        self, db: Session, *, owner_id: int, start_date: datetime, end_date: datetime, 
+        skip: int = 0, limit: int = 100
+    ) -> List[Task]:
+        """
+        Get multiple tasks by owner and due date range with pagination
+        """
+        return (
+            db.query(self.model)
+            .filter(
+                Task.owner_id == owner_id,
+                Task.due_date >= start_date,
+                Task.due_date <= end_date,
+                not Task.is_deleted
+            )
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+    
+    def get_by_id_and_owner(
+        self, db: Session, *, id: int, owner_id: int
+    ) -> Optional[Task]:
+        """
+        Get a task by ID and owner
+        """
+        return (
+            db.query(self.model)
+            .filter(
+                Task.id == id,
+                Task.owner_id == owner_id,
+                not Task.is_deleted
+            )
+            .first()
+        )
+    
+    def update_status(
+        self, db: Session, *, db_obj: Task, status: TaskStatus
+    ) -> Task:
+        """
+        Update a task status
+        """
+        db_obj.status = status
+        db_obj.updated_at = datetime.utcnow()
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+    
+    def soft_delete(
+        self, db: Session, *, db_obj: Task
+    ) -> Task:
+        """
+        Mark a task as deleted (soft delete)
+        """
+        db_obj.is_deleted = True
+        db_obj.updated_at = datetime.utcnow()
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+
+task = CRUDTask(Task)

app/crud/user.py

@@ -0,0 +1,86 @@
+"""
+CRUD operations for users
+"""
+from typing import Any, Dict, Optional, Union
+
+from sqlalchemy.orm import Session
+
+from app.core.security import get_password_hash, verify_password
+from app.crud.base import CRUDBase
+from app.models.user import User
+from app.schemas.user import UserCreate, UserUpdate
+
+
+class CRUDUser(CRUDBase[User, UserCreate, UserUpdate]):
+    """
+    CRUD operations for User model
+    """
+    def get_by_email(self, db: Session, *, email: str) -> Optional[User]:
+        """
+        Get a user by email
+        """
+        return db.query(User).filter(User.email == email).first()
+    
+    def get_by_username(self, db: Session, *, username: str) -> Optional[User]:
+        """
+        Get a user by username
+        """
+        return db.query(User).filter(User.username == username).first()
+
+    def create(self, db: Session, *, obj_in: UserCreate) -> User:
+        """
+        Create a new user with hashed password
+        """
+        db_obj = User(
+            email=obj_in.email,
+            username=obj_in.username,
+            hashed_password=get_password_hash(obj_in.password),
+            is_active=obj_in.is_active,
+            is_superuser=False,
+        )
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+    def update(
+        self, db: Session, *, db_obj: User, obj_in: Union[UserUpdate, Dict[str, Any]]
+    ) -> User:
+        """
+        Update a user, handling password hashing if needed
+        """
+        if isinstance(obj_in, dict):
+            update_data = obj_in
+        else:
+            update_data = obj_in.model_dump(exclude_unset=True)
+        if update_data.get("password"):
+            hashed_password = get_password_hash(update_data["password"])
+            del update_data["password"]
+            update_data["hashed_password"] = hashed_password
+        return super().update(db, db_obj=db_obj, obj_in=update_data)
+
+    def authenticate(self, db: Session, *, email: str, password: str) -> Optional[User]:
+        """
+        Authenticate a user with email and password
+        """
+        user = self.get_by_email(db, email=email)
+        if not user:
+            return None
+        if not verify_password(password, user.hashed_password):
+            return None
+        return user
+
+    def is_active(self, user: User) -> bool:
+        """
+        Check if user is active
+        """
+        return user.is_active
+
+    def is_superuser(self, user: User) -> bool:
+        """
+        Check if user is superuser
+        """
+        return user.is_superuser
+
+
+user = CRUDUser(User)

app/db/database.py

@@ -0,0 +1,38 @@
+"""
+Database configuration module
+"""
+from pathlib import Path
+
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+# Define the database directory
+DB_DIR = Path("/app") / "storage" / "db"
+DB_DIR.mkdir(parents=True, exist_ok=True)
+
+# SQLite database URL
+SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_DIR}/db.sqlite"
+
+# Create SQLAlchemy engine
+engine = create_engine(
+    SQLALCHEMY_DATABASE_URL, 
+    connect_args={"check_same_thread": False}  # SQLite specific
+)
+
+# Create SessionLocal class
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+# Create Base class
+Base = declarative_base()
+
+# Database dependency
+def get_db():
+    """
+    Dependency for database session
+    """
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

app/models/__init__.py

@@ -0,0 +1,5 @@
+"""
+Import models for easier access
+"""
+from app.models.task import Task, TaskPriority, TaskStatus
+from app.models.user import User

app/models/task.py

@@ -0,0 +1,56 @@
+"""
+Task model for the database
+"""
+import enum
+from datetime import datetime
+
+from sqlalchemy import (
+    Boolean,
+    Column,
+    DateTime,
+    Enum,
+    ForeignKey,
+    Integer,
+    String,
+    Text,
+)
+from sqlalchemy.orm import relationship
+
+from app.db.database import Base
+
+
+class TaskPriority(str, enum.Enum):
+    """
+    Task priority levels
+    """
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+
+class TaskStatus(str, enum.Enum):
+    """
+    Task status options
+    """
+    TODO = "todo"
+    IN_PROGRESS = "in_progress"
+    DONE = "done"
+
+class Task(Base):
+    """
+    Task model representing tasks in the system
+    """
+    __tablename__ = "tasks"
+
+    id = Column(Integer, primary_key=True, index=True)
+    title = Column(String(255), nullable=False)
+    description = Column(Text, nullable=True)
+    status = Column(Enum(TaskStatus), default=TaskStatus.TODO)
+    priority = Column(Enum(TaskPriority), default=TaskPriority.MEDIUM)
+    owner_id = Column(Integer, ForeignKey("users.id"))
+    due_date = Column(DateTime, nullable=True)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    is_deleted = Column(Boolean, default=False)
+    
+    # Relationship with user (many-to-one)
+    owner = relationship("User", back_populates="tasks")

app/models/user.py

@@ -0,0 +1,24 @@
+"""
+User model for the database
+"""
+from sqlalchemy import Boolean, Column, Integer, String
+from sqlalchemy.orm import relationship
+
+from app.db.database import Base
+
+
+class User(Base):
+    """
+    User model representing users in the system
+    """
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, index=True)
+    email = Column(String, unique=True, index=True, nullable=False)
+    username = Column(String, unique=True, index=True, nullable=False)
+    hashed_password = Column(String, nullable=False)
+    is_active = Column(Boolean, default=True)
+    is_superuser = Column(Boolean, default=False)
+    
+    # Relationship with tasks (one-to-many)
+    tasks = relationship("Task", back_populates="owner")

app/schemas/__init__.py

@@ -0,0 +1,5 @@
+"""
+Import schemas for easier access
+"""
+from app.schemas.task import Task, TaskCreate, TaskInDB, TaskUpdate
+from app.schemas.user import Token, TokenPayload, User, UserCreate, UserInDB, UserUpdate

app/schemas/task.py

@@ -0,0 +1,65 @@
+"""
+Task schemas for API request and response validation
+"""
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+from app.models.task import TaskPriority, TaskStatus
+
+
+class TaskBase(BaseModel):
+    """
+    Base task schema with common attributes
+    """
+    title: str = Field(..., min_length=1, max_length=255)
+    description: Optional[str] = None
+    status: Optional[TaskStatus] = TaskStatus.TODO
+    priority: Optional[TaskPriority] = TaskPriority.MEDIUM
+    due_date: Optional[datetime] = None
+
+class TaskCreate(TaskBase):
+    """
+    Schema for task creation
+    """
+    pass
+
+class TaskUpdate(BaseModel):
+    """
+    Schema for task update
+    """
+    title: Optional[str] = Field(None, min_length=1, max_length=255)
+    description: Optional[str] = None
+    status: Optional[TaskStatus] = None
+    priority: Optional[TaskPriority] = None
+    due_date: Optional[datetime] = None
+    is_deleted: Optional[bool] = None
+
+class TaskInDBBase(TaskBase):
+    """
+    Base schema for task in database
+    """
+    id: int
+    owner_id: int
+    created_at: datetime
+    updated_at: datetime
+    is_deleted: bool
+    
+    class Config:
+        """
+        Pydantic config
+        """
+        orm_mode = True
+
+class Task(TaskInDBBase):
+    """
+    Schema for task response
+    """
+    pass
+
+class TaskInDB(TaskInDBBase):
+    """
+    Schema for task in database
+    """
+    pass

app/schemas/user.py

@@ -0,0 +1,97 @@
+"""
+User schemas for API request and response validation
+"""
+import re
+from typing import Optional
+
+from pydantic import BaseModel, EmailStr, Field, validator
+
+
+class UserBase(BaseModel):
+    """
+    Base user schema with common attributes
+    """
+    email: EmailStr
+    username: str = Field(..., min_length=3, max_length=50)
+    is_active: Optional[bool] = True
+
+class UserCreate(UserBase):
+    """
+    Schema for user creation with password
+    """
+    password: str = Field(..., min_length=8)
+    
+    @validator('password')
+    def password_strength(cls, v):
+        """
+        Validate password strength
+        """
+        if not re.search(r'[A-Z]', v):
+            raise ValueError('Password must contain at least one uppercase letter')
+        if not re.search(r'[a-z]', v):
+            raise ValueError('Password must contain at least one lowercase letter')
+        if not re.search(r'[0-9]', v):
+            raise ValueError('Password must contain at least one digit')
+        return v
+
+class UserUpdate(BaseModel):
+    """
+    Schema for user update
+    """
+    email: Optional[EmailStr] = None
+    username: Optional[str] = Field(None, min_length=3, max_length=50)
+    password: Optional[str] = Field(None, min_length=8)
+    is_active: Optional[bool] = None
+    
+    @validator('password')
+    def password_strength(cls, v):
+        """
+        Validate password strength if provided
+        """
+        if v is None:
+            return v
+        if not re.search(r'[A-Z]', v):
+            raise ValueError('Password must contain at least one uppercase letter')
+        if not re.search(r'[a-z]', v):
+            raise ValueError('Password must contain at least one lowercase letter')
+        if not re.search(r'[0-9]', v):
+            raise ValueError('Password must contain at least one digit')
+        return v
+
+class UserInDBBase(UserBase):
+    """
+    Base schema for user in database
+    """
+    id: int
+    is_superuser: Optional[bool] = False
+    
+    class Config:
+        """
+        Pydantic config
+        """
+        orm_mode = True
+
+class User(UserInDBBase):
+    """
+    Schema for user response
+    """
+    pass
+
+class UserInDB(UserInDBBase):
+    """
+    Schema for user in database with password
+    """
+    hashed_password: str
+
+class Token(BaseModel):
+    """
+    Schema for access token
+    """
+    access_token: str
+    token_type: str
+
+class TokenPayload(BaseModel):
+    """
+    Schema for token payload
+    """
+    sub: Optional[int] = None

main.py

@@ -0,0 +1,72 @@
+"""
+Task Manager API - Main application entry point
+"""
+from app.api.v1.api import api_router
+from app.core.config import settings
+from fastapi import FastAPI, Request
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.openapi.utils import get_openapi
+from fastapi.responses import JSONResponse
+
+# Set up FastAPI application
+app = FastAPI(
+    title="Task Manager API",
+    description="API for managing tasks and users",
+    version="0.1.0",
+    docs_url="/docs",
+    redoc_url="/redoc",
+    openapi_url="/openapi.json",
+)
+
+# Add CORS middleware
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=[origin for origin in settings.BACKEND_CORS_ORIGINS],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Include API router
+app.include_router(api_router, prefix=settings.API_V1_STR)
+
+# Add health check endpoint
+@app.get("/health", tags=["Health"])
+async def health_check():
+    """
+    Health check endpoint to verify API is running properly
+    """
+    return {"status": "healthy"}
+
+# Custom OpenAPI schema
+def custom_openapi():
+    if app.openapi_schema:
+        return app.openapi_schema
+    
+    openapi_schema = get_openapi(
+        title=app.title,
+        version=app.version,
+        description=app.description,
+        routes=app.routes,
+    )
+    
+    # Custom modifications to OpenAPI schema can be added here
+    
+    app.openapi_schema = openapi_schema
+    return app.openapi_schema
+
+app.openapi = custom_openapi
+
+# Global exception handler
+@app.exception_handler(Exception)
+async def global_exception_handler(request: Request, exc: Exception):
+    """Global exception handler for unhandled exceptions"""
+    return JSONResponse(
+        status_code=500,
+        content={"detail": "Internal server error", "type": "internal_error"}
+    )
+
+if __name__ == "__main__":
+    import uvicorn
+    # Run the application with uvicorn when script is executed directly
+    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)

migrations/README

@@ -0,0 +1,18 @@
+Generic single-database configuration with SQLite.
+
+This directory contains Alembic migrations for the database schema.
+
+To generate a new migration:
+```
+alembic revision --autogenerate -m "Description of changes"
+```
+
+To apply migrations:
+```
+alembic upgrade head
+```
+
+To downgrade:
+```
+alembic downgrade -1
+```

migrations/env.py

@@ -0,0 +1,84 @@
+"""
+Alembic environment module
+"""
+from logging.config import fileConfig
+
+from alembic import context
+from app.db.database import Base
+
+# Import the database models for Alembic
+from sqlalchemy import engine_from_config, pool
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+target_metadata = Base.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        is_sqlite = connection.dialect.name == 'sqlite'
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+            render_as_batch=is_sqlite  # Key configuration for SQLite
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

migrations/script.py.mako

@@ -0,0 +1,24 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

migrations/versions/1a1a1a1a1a1a_initial_migration.py

@@ -0,0 +1,64 @@
+"""initial migration
+
+Revision ID: 1a1a1a1a1a1a
+Revises: 
+Create Date: 2023-06-21 00:00:00.000000
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = '1a1a1a1a1a1a'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # Create users table
+    op.create_table('users',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('email', sa.String(), nullable=False),
+        sa.Column('username', sa.String(), nullable=False),
+        sa.Column('hashed_password', sa.String(), nullable=False),
+        sa.Column('is_active', sa.Boolean(), nullable=True),
+        sa.Column('is_superuser', sa.Boolean(), nullable=True),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_users_email'), 'users', ['email'], unique=True)
+    op.create_index(op.f('ix_users_id'), 'users', ['id'], unique=False)
+    op.create_index(op.f('ix_users_username'), 'users', ['username'], unique=True)
+
+    # Create tasks table with enum types
+    op.create_table('tasks',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('title', sa.String(length=255), nullable=False),
+        sa.Column('description', sa.Text(), nullable=True),
+        sa.Column('status', 
+                 sa.Enum('todo', 'in_progress', 'done', name='taskstatus'), 
+                 nullable=True),
+        sa.Column('priority', 
+                 sa.Enum('low', 'medium', 'high', name='taskpriority'), 
+                 nullable=True),
+        sa.Column('owner_id', sa.Integer(), nullable=True),
+        sa.Column('due_date', sa.DateTime(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(), nullable=True),
+        sa.Column('is_deleted', sa.Boolean(), nullable=True),
+        sa.ForeignKeyConstraint(['owner_id'], ['users.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_tasks_id'), 'tasks', ['id'], unique=False)
+
+
+def downgrade():
+    # Drop tasks table
+    op.drop_index(op.f('ix_tasks_id'), table_name='tasks')
+    op.drop_table('tasks')
+    
+    # Drop users table
+    op.drop_index(op.f('ix_users_username'), table_name='users')
+    op.drop_index(op.f('ix_users_id'), table_name='users')
+    op.drop_index(op.f('ix_users_email'), table_name='users')
+    op.drop_table('users')

pyproject.toml

@@ -0,0 +1,17 @@
+[tool.ruff]
+line-length = 88
+indent-width = 4
+target-version = "py310"
+src = ["app"]
+
+[tool.ruff.lint]
+# Enable pycodestyle ('E'), Pyflakes ('F'), and isort ('I')
+select = ["E", "F", "I"]
+ignore = []
+
+# Allow unused variables that start with an underscore.
+dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
+
+[tool.ruff.lint.per-file-ignores]
+# Ignore imported but unused in __init__.py files
+"__init__.py" = ["F401"]

requirements.txt

@@ -0,0 +1,14 @@
+fastapi>=0.100.0
+uvicorn>=0.22.0
+pydantic>=2.0.0
+pydantic-settings>=2.0.0
+sqlalchemy>=2.0.0
+alembic>=1.11.0
+python-dotenv>=1.0.0
+python-jose[cryptography]>=3.3.0
+passlib[bcrypt]>=1.7.4
+python-multipart>=0.0.6
+ruff>=0.0.270
+httpx>=0.24.1
+pytest>=7.3.1
+pytest-asyncio>=0.21.0

test_api.py

@@ -0,0 +1,171 @@
+"""
+Test script for the Task Manager API
+"""
+import os
+import unittest
+from fastapi.testclient import TestClient
+
+from main import app
+from app.db.database import Base, engine
+
+# Create test client
+client = TestClient(app)
+
+class TestAPI(unittest.TestCase):
+    """
+    Test class for API endpoints
+    """
+    def setUp(self):
+        # Create tables
+        Base.metadata.create_all(bind=engine)
+    
+    def tearDown(self):
+        # Drop tables
+        Base.metadata.drop_all(bind=engine)
+    
+    def test_health_endpoint(self):
+        """
+        Test the health endpoint
+        """
+        response = client.get("/health")
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.json(), {"status": "healthy"})
+    
+    def test_user_registration(self):
+        """
+        Test user registration
+        """
+        user_data = {
+            "email": "test@example.com",
+            "username": "testuser",
+            "password": "Password123"
+        }
+        response = client.post(
+            "/api/v1/auth/register",
+            json=user_data
+        )
+        self.assertEqual(response.status_code, 200)
+        data = response.json()
+        self.assertEqual(data["email"], user_data["email"])
+        self.assertEqual(data["username"], user_data["username"])
+        self.assertTrue(data["is_active"])
+        self.assertFalse(data["is_superuser"])
+    
+    def test_login(self):
+        """
+        Test user login
+        """
+        # First register a user
+        user_data = {
+            "email": "test@example.com",
+            "username": "testuser",
+            "password": "Password123"
+        }
+        client.post(
+            "/api/v1/auth/register",
+            json=user_data
+        )
+        
+        # Then try to login
+        login_data = {
+            "username": user_data["email"],
+            "password": user_data["password"]
+        }
+        response = client.post(
+            "/api/v1/auth/login",
+            data=login_data
+        )
+        self.assertEqual(response.status_code, 200)
+        data = response.json()
+        self.assertIn("access_token", data)
+        self.assertEqual(data["token_type"], "bearer")
+    
+    def test_task_crud(self):
+        """
+        Test task CRUD operations
+        """
+        # Register a user
+        user_data = {
+            "email": "test@example.com",
+            "username": "testuser",
+            "password": "Password123"
+        }
+        client.post(
+            "/api/v1/auth/register",
+            json=user_data
+        )
+        
+        # Login to get token
+        login_data = {
+            "username": user_data["email"],
+            "password": user_data["password"]
+        }
+        login_response = client.post(
+            "/api/v1/auth/login",
+            data=login_data
+        )
+        token = login_response.json()["access_token"]
+        headers = {"Authorization": f"Bearer {token}"}
+        
+        # Create a task
+        task_data = {
+            "title": "Test Task",
+            "description": "Test Description",
+            "priority": "high"
+        }
+        response = client.post(
+            "/api/v1/tasks",
+            json=task_data,
+            headers=headers
+        )
+        self.assertEqual(response.status_code, 200)
+        created_task = response.json()
+        self.assertEqual(created_task["title"], task_data["title"])
+        self.assertEqual(created_task["description"], task_data["description"])
+        self.assertEqual(created_task["priority"], task_data["priority"])
+        task_id = created_task["id"]
+        
+        # Read the task
+        response = client.get(
+            f"/api/v1/tasks/{task_id}",
+            headers=headers
+        )
+        self.assertEqual(response.status_code, 200)
+        read_task = response.json()
+        self.assertEqual(read_task["id"], task_id)
+        self.assertEqual(read_task["title"], task_data["title"])
+        
+        # Update the task
+        update_data = {
+            "title": "Updated Task",
+            "status": "in_progress"
+        }
+        response = client.put(
+            f"/api/v1/tasks/{task_id}",
+            json=update_data,
+            headers=headers
+        )
+        self.assertEqual(response.status_code, 200)
+        updated_task = response.json()
+        self.assertEqual(updated_task["title"], update_data["title"])
+        self.assertEqual(updated_task["status"], update_data["status"])
+        
+        # Delete the task
+        response = client.delete(
+            f"/api/v1/tasks/{task_id}",
+            headers=headers
+        )
+        self.assertEqual(response.status_code, 200)
+        deleted_task = response.json()
+        self.assertEqual(deleted_task["id"], task_id)
+        self.assertTrue(deleted_task["is_deleted"])
+        
+        # Try to get the deleted task
+        response = client.get(
+            f"/api/v1/tasks/{task_id}",
+            headers=headers
+        )
+        self.assertEqual(response.status_code, 404)
+
+if __name__ == "__main__":
+    unittest.main()