Build e-commerce API with FastAPI and SQLite

- Implemented user authentication with JWT tokens - Created product management endpoints - Added shopping cart functionality - Implemented order management system - Setup database models with SQLAlchemy - Created alembic migrations - Added health check endpoint generated with BackendIM... (backend.im)
2025-05-13 22:46:42 +00:00 · 2025-05-13 22:46:42 +00:00 · 4458f5320b
commit 4458f5320b
parent 7d36fcf43a
36 changed files with 1602 additions and 2 deletions
--- a/README.md
+++ b/README.md
@ -1,3 +1,89 @@
-# FastAPI Application
+# E-Commerce API

-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A RESTful API for e-commerce applications built with FastAPI and SQLite. This API provides endpoints for user authentication, product management, shopping cart functionality, and order processing.
+
+## Features
+
+- User authentication with JWT tokens
+- Product catalog with filtering capabilities
+- Shopping cart functionality
+- Order management and processing
+- Admin routes for managing products and orders
+- Data persistence with SQLite
+- Alembic migrations for database version control
+
+## API Endpoints
+
+### Authentication
+- `POST /api/v1/auth/register` - Register a new user
+- `POST /api/v1/auth/login` - Login and get access token
+
+### Users
+- `GET /api/v1/users/me` - Get current user information
+- `PUT /api/v1/users/me` - Update current user information
+- `GET /api/v1/users/{user_id}` - Get user by ID (admin or self only)
+- `GET /api/v1/users/` - List all users (admin only)
+- `DELETE /api/v1/users/{user_id}` - Delete a user (admin only)
+
+### Products
+- `GET /api/v1/products/` - List all active products with filtering options
+- `POST /api/v1/products/` - Create a new product (admin only)
+- `GET /api/v1/products/{product_id}` - Get product details
+- `PUT /api/v1/products/{product_id}` - Update a product (admin only)
+- `DELETE /api/v1/products/{product_id}` - Soft delete a product (admin only)
+
+### Cart
+- `GET /api/v1/cart/` - Get current user's cart items
+- `POST /api/v1/cart/` - Add item to cart
+- `PUT /api/v1/cart/{cart_item_id}` - Update cart item quantity
+- `DELETE /api/v1/cart/{cart_item_id}` - Remove item from cart
+- `DELETE /api/v1/cart/` - Clear cart
+
+### Orders
+- `GET /api/v1/orders/` - List user's orders (or all orders for admin)
+- `POST /api/v1/orders/` - Create a new order from cart or specified items
+- `GET /api/v1/orders/{order_id}` - Get order details with items
+- `PUT /api/v1/orders/{order_id}/status` - Update order status (admin only)
+- `DELETE /api/v1/orders/{order_id}` - Cancel a pending order
+
+### Health Check
+- `GET /health` - Check API health status
+
+## Getting Started
+
+### Prerequisites
+- Python 3.8 or higher
+
+### Installation
+
+1. Clone the repository
+   ```
+   git clone <repository-url>
+   ```
+
+2. Install dependencies
+   ```
+   pip install -r requirements.txt
+   ```
+
+3. Initialize the database
+   ```
+   alembic upgrade head
+   ```
+
+4. Run the server
+   ```
+   uvicorn main:app --reload
+   ```
+
+## API Documentation
+When the server is running, you can access the interactive API documentation at:
+- Swagger UI: http://localhost:8000/docs
+- ReDoc: http://localhost:8000/redoc
+
+## Environment Variables
+
+You can customize the following settings in the `app/core/config.py` file:
+- `SECRET_KEY`: Secret key for JWT token generation
+- `ACCESS_TOKEN_EXPIRE_MINUTES`: Token expiration time
+- `BACKEND_CORS_ORIGINS`: CORS origin settings
--- a/alembic.ini
+++ b/alembic.ini
@ -0,0 +1,84 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = alembic
+
+# template used to generate migration files
+file_template = %%(year)d%%(month).2d%%(day).2d_%%(hour).2d%%(minute).2d%%(second).2d_%%(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 alembic/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path
+# version_locations = %(here)s/bar %(here)s/bat alembic/versions
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+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
--- a/alembic/init.py
+++ b/alembic/init.py
--- a/alembic/env.py
+++ b/alembic/env.py
@ -0,0 +1,77 @@
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+# 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 app.models.base import Base
+from app.models import User, Product, CartItem, Order, OrderItem
+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:
+        context.configure(
+            connection=connection, target_metadata=target_metadata
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()
--- a/alembic/script.py.mako
+++ b/alembic/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"}
--- a/alembic/versions/20250513_000001_initial_migration.py
+++ b/alembic/versions/20250513_000001_initial_migration.py
@ -0,0 +1,112 @@
+"""initial migration
+
+Revision ID: 20250513_000001
+Revises: 
+Create Date: 2025-05-13 00:00:01.000000
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '20250513_000001'
+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('password', sa.String(), nullable=False),
+        sa.Column('full_name', sa.String(), nullable=True),
+        sa.Column('is_active', sa.Boolean(), nullable=True, default=True),
+        sa.Column('is_admin', sa.Boolean(), nullable=True, default=False),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.func.now(), onupdate=sa.func.now(), 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)
+    
+    # Create products table
+    op.create_table(
+        'products',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('name', sa.String(), nullable=False),
+        sa.Column('description', sa.Text(), nullable=True),
+        sa.Column('price', sa.Float(), nullable=False),
+        sa.Column('stock', sa.Integer(), nullable=False, default=0),
+        sa.Column('image_url', sa.String(), nullable=True),
+        sa.Column('is_active', sa.Boolean(), nullable=True, default=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.func.now(), onupdate=sa.func.now(), nullable=True),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_products_id'), 'products', ['id'], unique=False)
+    op.create_index(op.f('ix_products_name'), 'products', ['name'], unique=False)
+    
+    # Create orders table
+    op.create_table(
+        'orders',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('user_id', sa.Integer(), nullable=False),
+        sa.Column('total_amount', sa.Float(), nullable=False),
+        sa.Column('status', sa.String(), nullable=False, default='pending'),
+        sa.Column('shipping_address', sa.String(), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.func.now(), onupdate=sa.func.now(), nullable=True),
+        sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_orders_id'), 'orders', ['id'], unique=False)
+    
+    # Create order_items table
+    op.create_table(
+        'order_items',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('order_id', sa.Integer(), nullable=False),
+        sa.Column('product_id', sa.Integer(), nullable=False),
+        sa.Column('quantity', sa.Integer(), nullable=False),
+        sa.Column('unit_price', sa.Float(), nullable=False),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.func.now(), onupdate=sa.func.now(), nullable=True),
+        sa.ForeignKeyConstraint(['order_id'], ['orders.id'], ),
+        sa.ForeignKeyConstraint(['product_id'], ['products.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_order_items_id'), 'order_items', ['id'], unique=False)
+    
+    # Create cart_items table
+    op.create_table(
+        'cart_items',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('user_id', sa.Integer(), nullable=False),
+        sa.Column('product_id', sa.Integer(), nullable=False),
+        sa.Column('quantity', sa.Integer(), nullable=False, default=1),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), server_default=sa.func.now(), onupdate=sa.func.now(), nullable=True),
+        sa.ForeignKeyConstraint(['product_id'], ['products.id'], ),
+        sa.ForeignKeyConstraint(['user_id'], ['users.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_cart_items_id'), 'cart_items', ['id'], unique=False)
+
+
+def downgrade():
+    op.drop_index(op.f('ix_cart_items_id'), table_name='cart_items')
+    op.drop_table('cart_items')
+    op.drop_index(op.f('ix_order_items_id'), table_name='order_items')
+    op.drop_table('order_items')
+    op.drop_index(op.f('ix_orders_id'), table_name='orders')
+    op.drop_table('orders')
+    op.drop_index(op.f('ix_products_name'), table_name='products')
+    op.drop_index(op.f('ix_products_id'), table_name='products')
+    op.drop_table('products')
+    op.drop_index(op.f('ix_users_email'), table_name='users')
+    op.drop_index(op.f('ix_users_id'), table_name='users')
+    op.drop_table('users')
--- a/app/init.py
+++ b/app/init.py
--- a/app/api/init.py
+++ b/app/api/init.py
--- a/app/api/deps.py
+++ b/app/api/deps.py
@ -0,0 +1,53 @@
+from typing import Generator, Optional
+
+from fastapi import Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordBearer
+from jose import jwt, JWTError
+from pydantic import ValidationError
+from sqlalchemy.orm import Session
+
+from app import models, schemas
+from app.core import security
+from app.core.config import settings
+from app.db.session import get_db
+
+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:
+    try:
+        payload = jwt.decode(
+            token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM]
+        )
+        token_data = schemas.TokenPayload(**payload)
+    except (JWTError, ValidationError):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN,
+            detail="Could not validate credentials",
+        )
+    user = db.query(models.User).filter(models.User.id == token_data.sub).first()
+    if not user:
+        raise HTTPException(status_code=404, detail="User not found")
+    if not user.is_active:
+        raise HTTPException(status_code=400, detail="Inactive user")
+    return user
+
+
+def get_current_active_user(
+    current_user: models.User = Depends(get_current_user),
+) -> models.User:
+    if not current_user.is_active:
+        raise HTTPException(status_code=400, detail="Inactive user")
+    return current_user
+
+
+def get_current_active_admin(
+    current_user: models.User = Depends(get_current_user),
+) -> models.User:
+    if not current_user.is_admin:
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN, detail="Not enough permissions"
+        )
+    return current_user
--- a/app/api/endpoints/init.py
+++ b/app/api/endpoints/init.py
--- a/app/api/endpoints/auth.py
+++ b/app/api/endpoints/auth.py
@ -0,0 +1,65 @@
+from datetime import timedelta
+from typing import Any
+
+from fastapi import APIRouter, Body, Depends, HTTPException
+from fastapi.security import OAuth2PasswordRequestForm
+from sqlalchemy.orm import Session
+
+from app import models, schemas
+from app.api import deps
+from app.core import security
+from app.core.config import settings
+
+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 = db.query(models.User).filter(models.User.email == form_data.username).first()
+    if not user or not security.verify_password(form_data.password, user.password):
+        raise HTTPException(status_code=400, detail="Incorrect email or password")
+    elif not user.is_active:
+        raise HTTPException(status_code=400, 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 = db.query(models.User).filter(models.User.email == user_in.email).first()
+    if user:
+        raise HTTPException(
+            status_code=400,
+            detail="A user with this email already exists.",
+        )
+    
+    hashed_password = security.get_password_hash(user_in.password)
+    db_user = models.User(
+        email=user_in.email,
+        password=hashed_password,
+        full_name=user_in.full_name,
+        is_active=user_in.is_active,
+        is_admin=user_in.is_admin,
+    )
+    db.add(db_user)
+    db.commit()
+    db.refresh(db_user)
+    return db_user
--- a/app/api/endpoints/cart.py
+++ b/app/api/endpoints/cart.py
@ -0,0 +1,161 @@
+from typing import Any, List
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session, joinedload
+
+from app import models, schemas
+from app.api import deps
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[schemas.CartItemWithProduct])
+def read_cart_items(
+    db: Session = Depends(deps.get_db),
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Retrieve cart items for the current user.
+    """
+    cart_items = (
+        db.query(models.CartItem)
+        .filter(models.CartItem.user_id == current_user.id)
+        .options(joinedload(models.CartItem.product))
+        .all()
+    )
+    return cart_items
+
+
+@router.post("/", response_model=schemas.CartItem)
+def add_cart_item(
+    *,
+    db: Session = Depends(deps.get_db),
+    cart_item_in: schemas.CartItemCreate,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Add item to cart.
+    """
+    # Check if product exists and is active
+    product = db.query(models.Product).filter(
+        models.Product.id == cart_item_in.product_id,
+        models.Product.is_active == True
+    ).first()
+    if not product:
+        raise HTTPException(
+            status_code=404,
+            detail="Product not found or inactive",
+        )
+    
+    # Check if product is in stock
+    if product.stock < cart_item_in.quantity:
+        raise HTTPException(
+            status_code=400,
+            detail=f"Not enough stock available. Only {product.stock} items left.",
+        )
+    
+    # Check if item already in cart, update quantity if it is
+    existing_item = db.query(models.CartItem).filter(
+        models.CartItem.user_id == current_user.id,
+        models.CartItem.product_id == cart_item_in.product_id
+    ).first()
+    
+    if existing_item:
+        existing_item.quantity += cart_item_in.quantity
+        db.add(existing_item)
+        db.commit()
+        db.refresh(existing_item)
+        return existing_item
+    
+    # Create new cart item
+    cart_item = models.CartItem(
+        user_id=current_user.id,
+        product_id=cart_item_in.product_id,
+        quantity=cart_item_in.quantity,
+    )
+    db.add(cart_item)
+    db.commit()
+    db.refresh(cart_item)
+    return cart_item
+
+
+@router.put("/{cart_item_id}", response_model=schemas.CartItem)
+def update_cart_item(
+    *,
+    db: Session = Depends(deps.get_db),
+    cart_item_id: int,
+    cart_item_in: schemas.CartItemUpdate,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Update quantity of cart item.
+    """
+    cart_item = db.query(models.CartItem).filter(
+        models.CartItem.id == cart_item_id,
+        models.CartItem.user_id == current_user.id
+    ).first()
+    
+    if not cart_item:
+        raise HTTPException(
+            status_code=404,
+            detail="Cart item not found",
+        )
+    
+    # Check if product has enough stock
+    product = db.query(models.Product).filter(models.Product.id == cart_item.product_id).first()
+    if not product or product.stock < cart_item_in.quantity:
+        raise HTTPException(
+            status_code=400,
+            detail=f"Not enough stock available. Only {product.stock if product else 0} items left.",
+        )
+    
+    cart_item.quantity = cart_item_in.quantity
+    db.add(cart_item)
+    db.commit()
+    db.refresh(cart_item)
+    return cart_item
+
+
+@router.delete("/{cart_item_id}", response_model=schemas.CartItem)
+def delete_cart_item(
+    *,
+    db: Session = Depends(deps.get_db),
+    cart_item_id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Delete cart item.
+    """
+    cart_item = db.query(models.CartItem).filter(
+        models.CartItem.id == cart_item_id,
+        models.CartItem.user_id == current_user.id
+    ).first()
+    
+    if not cart_item:
+        raise HTTPException(
+            status_code=404,
+            detail="Cart item not found",
+        )
+    
+    db.delete(cart_item)
+    db.commit()
+    return cart_item
+
+
+@router.delete("/", response_model=List[schemas.CartItem])
+def clear_cart(
+    db: Session = Depends(deps.get_db),
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Clear all items from cart.
+    """
+    cart_items = db.query(models.CartItem).filter(
+        models.CartItem.user_id == current_user.id
+    ).all()
+    
+    for item in cart_items:
+        db.delete(item)
+    
+    db.commit()
+    return cart_items
--- a/app/api/endpoints/orders.py
+++ b/app/api/endpoints/orders.py
@ -0,0 +1,244 @@
+from typing import Any, List
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session, joinedload
+
+from app import models, schemas
+from app.api import deps
+from app.models.order import OrderStatus
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[schemas.Order])
+def read_orders(
+    db: Session = Depends(deps.get_db),
+    skip: int = 0,
+    limit: int = 100,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Retrieve orders for current user.
+    """
+    if current_user.is_admin:
+        orders = db.query(models.Order).offset(skip).limit(limit).all()
+    else:
+        orders = (
+            db.query(models.Order)
+            .filter(models.Order.user_id == current_user.id)
+            .offset(skip)
+            .limit(limit)
+            .all()
+        )
+    return orders
+
+
+@router.post("/", response_model=schemas.Order)
+def create_order(
+    *,
+    db: Session = Depends(deps.get_db),
+    order_in: schemas.OrderCreate,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Create new order. Can create from provided items or from user's cart.
+    """
+    # If no items provided, use cart
+    if not order_in.items or len(order_in.items) == 0:
+        cart_items = (
+            db.query(models.CartItem)
+            .filter(models.CartItem.user_id == current_user.id)
+            .all()
+        )
+        
+        if not cart_items or len(cart_items) == 0:
+            raise HTTPException(
+                status_code=400,
+                detail="Cart is empty and no items provided",
+            )
+        
+        # Calculate total and create order
+        total_amount = 0.0
+        order_items = []
+        
+        for cart_item in cart_items:
+            product = db.query(models.Product).filter(models.Product.id == cart_item.product_id).first()
+            
+            if not product or not product.is_active:
+                raise HTTPException(
+                    status_code=400,
+                    detail=f"Product with id {cart_item.product_id} not found or is inactive",
+                )
+            
+            if product.stock < cart_item.quantity:
+                raise HTTPException(
+                    status_code=400,
+                    detail=f"Not enough stock for product '{product.name}'. Requested: {cart_item.quantity}, Available: {product.stock}",
+                )
+            
+            item_total = product.price * cart_item.quantity
+            total_amount += item_total
+            
+            order_items.append(
+                models.OrderItem(
+                    product_id=product.id,
+                    quantity=cart_item.quantity,
+                    unit_price=product.price,
+                )
+            )
+            
+            # Update product stock
+            product.stock -= cart_item.quantity
+            db.add(product)
+            
+            # Remove from cart
+            db.delete(cart_item)
+    else:
+        # Create order from provided items
+        total_amount = 0.0
+        order_items = []
+        
+        for item in order_in.items:
+            product = db.query(models.Product).filter(
+                models.Product.id == item.product_id,
+                models.Product.is_active == True
+            ).first()
+            
+            if not product:
+                raise HTTPException(
+                    status_code=400,
+                    detail=f"Product with id {item.product_id} not found or is inactive",
+                )
+            
+            if product.stock < item.quantity:
+                raise HTTPException(
+                    status_code=400,
+                    detail=f"Not enough stock for product '{product.name}'. Requested: {item.quantity}, Available: {product.stock}",
+                )
+            
+            item_total = product.price * item.quantity
+            total_amount += item_total
+            
+            order_items.append(
+                models.OrderItem(
+                    product_id=product.id,
+                    quantity=item.quantity,
+                    unit_price=product.price,
+                )
+            )
+            
+            # Update product stock
+            product.stock -= item.quantity
+            db.add(product)
+    
+    # Create order
+    order = models.Order(
+        user_id=current_user.id,
+        total_amount=total_amount,
+        status=OrderStatus.PENDING,
+        shipping_address=order_in.shipping_address,
+    )
+    
+    db.add(order)
+    db.commit()
+    db.refresh(order)
+    
+    # Add order items
+    for item in order_items:
+        item.order_id = order.id
+        db.add(item)
+    
+    db.commit()
+    db.refresh(order)
+    return order
+
+
+@router.get("/{order_id}", response_model=schemas.OrderWithItems)
+def read_order(
+    *,
+    db: Session = Depends(deps.get_db),
+    order_id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Get a specific order by id.
+    """
+    order = (
+        db.query(models.Order)
+        .options(joinedload(models.Order.items).joinedload(models.OrderItem.product))
+        .filter(models.Order.id == order_id)
+        .first()
+    )
+    
+    if not order:
+        raise HTTPException(status_code=404, detail="Order not found")
+    
+    if order.user_id != current_user.id and not current_user.is_admin:
+        raise HTTPException(status_code=403, detail="Not enough permissions")
+    
+    return order
+
+
+@router.put("/{order_id}/status", response_model=schemas.Order)
+def update_order_status(
+    *,
+    db: Session = Depends(deps.get_db),
+    order_id: int,
+    status: OrderStatus,
+    current_user: models.User = Depends(deps.get_current_active_admin),
+) -> Any:
+    """
+    Update an order's status. Admin only.
+    """
+    order = db.query(models.Order).filter(models.Order.id == order_id).first()
+    
+    if not order:
+        raise HTTPException(status_code=404, detail="Order not found")
+    
+    order.status = status
+    db.add(order)
+    db.commit()
+    db.refresh(order)
+    return order
+
+
+@router.delete("/{order_id}", response_model=schemas.Order)
+def cancel_order(
+    *,
+    db: Session = Depends(deps.get_db),
+    order_id: int,
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Cancel an order. Only possible if status is pending.
+    """
+    order = db.query(models.Order).filter(
+        models.Order.id == order_id
+    ).first()
+    
+    if not order:
+        raise HTTPException(status_code=404, detail="Order not found")
+    
+    if order.user_id != current_user.id and not current_user.is_admin:
+        raise HTTPException(status_code=403, detail="Not enough permissions")
+    
+    if order.status != OrderStatus.PENDING:
+        raise HTTPException(
+            status_code=400,
+            detail=f"Cannot cancel order with status '{order.status}'. Only pending orders can be cancelled."
+        )
+    
+    # Return items to stock
+    order_items = db.query(models.OrderItem).filter(models.OrderItem.order_id == order.id).all()
+    
+    for item in order_items:
+        product = db.query(models.Product).filter(models.Product.id == item.product_id).first()
+        if product:
+            product.stock += item.quantity
+            db.add(product)
+    
+    order.status = OrderStatus.CANCELLED
+    db.add(order)
+    db.commit()
+    db.refresh(order)
+    return order
--- a/app/api/endpoints/products.py
+++ b/app/api/endpoints/products.py
@ -0,0 +1,131 @@
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy.orm import Session
+
+from app import models, schemas
+from app.api import deps
+
+router = APIRouter()
+
+
+@router.get("/", response_model=List[schemas.Product])
+def read_products(
+    db: Session = Depends(deps.get_db),
+    skip: int = 0,
+    limit: int = 100,
+    name: Optional[str] = None,
+    min_price: Optional[float] = None,
+    max_price: Optional[float] = None,
+) -> Any:
+    """
+    Retrieve products with optional filtering.
+    """
+    query = db.query(models.Product).filter(models.Product.is_active == True)
+    
+    if name:
+        query = query.filter(models.Product.name.ilike(f"%{name}%"))
+    if min_price is not None:
+        query = query.filter(models.Product.price >= min_price)
+    if max_price is not None:
+        query = query.filter(models.Product.price <= max_price)
+    
+    products = query.offset(skip).limit(limit).all()
+    return products
+
+
+@router.post("/", response_model=schemas.Product)
+def create_product(
+    *,
+    db: Session = Depends(deps.get_db),
+    product_in: schemas.ProductCreate,
+    current_user: models.User = Depends(deps.get_current_active_admin),
+) -> Any:
+    """
+    Create new product.
+    """
+    product = models.Product(
+        name=product_in.name,
+        description=product_in.description,
+        price=product_in.price,
+        stock=product_in.stock,
+        image_url=product_in.image_url,
+        is_active=product_in.is_active,
+    )
+    db.add(product)
+    db.commit()
+    db.refresh(product)
+    return product
+
+
+@router.get("/{product_id}", response_model=schemas.Product)
+def read_product(
+    *,
+    db: Session = Depends(deps.get_db),
+    product_id: int,
+) -> Any:
+    """
+    Get product by ID.
+    """
+    product = db.query(models.Product).filter(
+        models.Product.id == product_id,
+        models.Product.is_active == True
+    ).first()
+    if not product:
+        raise HTTPException(
+            status_code=404, detail="Product not found"
+        )
+    return product
+
+
+@router.put("/{product_id}", response_model=schemas.Product)
+def update_product(
+    *,
+    db: Session = Depends(deps.get_db),
+    product_id: int,
+    product_in: schemas.ProductUpdate,
+    current_user: models.User = Depends(deps.get_current_active_admin),
+) -> Any:
+    """
+    Update a product.
+    """
+    product = db.query(models.Product).filter(models.Product.id == product_id).first()
+    if not product:
+        raise HTTPException(
+            status_code=404,
+            detail="Product not found",
+        )
+    
+    update_data = product_in.dict(exclude_unset=True)
+    for field, value in update_data.items():
+        setattr(product, field, value)
+    
+    db.add(product)
+    db.commit()
+    db.refresh(product)
+    return product
+
+
+@router.delete("/{product_id}", response_model=schemas.Product)
+def delete_product(
+    *,
+    db: Session = Depends(deps.get_db),
+    product_id: int,
+    current_user: models.User = Depends(deps.get_current_active_admin),
+) -> Any:
+    """
+    Delete a product.
+    """
+    product = db.query(models.Product).filter(models.Product.id == product_id).first()
+    if not product:
+        raise HTTPException(
+            status_code=404,
+            detail="Product not found",
+        )
+    
+    # Soft delete by marking as inactive
+    product.is_active = False
+    db.add(product)
+    db.commit()
+    db.refresh(product)
+    return product
--- a/app/api/endpoints/users.py
+++ b/app/api/endpoints/users.py
@ -0,0 +1,129 @@
+from typing import Any, List
+
+from fastapi import APIRouter, Body, Depends, HTTPException
+from fastapi.encoders import jsonable_encoder
+from sqlalchemy.orm import Session
+
+from app import models, schemas
+from app.api import deps
+from app.core.security import get_password_hash
+
+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_admin),
+) -> Any:
+    """
+    Retrieve users.
+    """
+    users = db.query(models.User).offset(skip).limit(limit).all()
+    return users
+
+
+@router.get("/me", response_model=schemas.User)
+def read_user_me(
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Get current user.
+    """
+    return current_user
+
+
+@router.put("/me", response_model=schemas.User)
+def update_user_me(
+    *,
+    db: Session = Depends(deps.get_db),
+    password: str = Body(None),
+    full_name: str = Body(None),
+    email: str = Body(None),
+    current_user: models.User = Depends(deps.get_current_active_user),
+) -> Any:
+    """
+    Update own user.
+    """
+    current_user_data = jsonable_encoder(current_user)
+    user_in = schemas.UserUpdate(**current_user_data)
+    if password is not None:
+        user_in.password = password
+    if full_name is not None:
+        user_in.full_name = full_name
+    if email is not None:
+        user_in.email = email
+    
+    if user_in.password:
+        hashed_password = get_password_hash(user_in.password)
+        current_user.password = hashed_password
+    if user_in.full_name:
+        current_user.full_name = user_in.full_name
+    if user_in.email:
+        # Check if email already exists
+        user = db.query(models.User).filter(
+            models.User.email == user_in.email,
+            models.User.id != current_user.id
+        ).first()
+        if user:
+            raise HTTPException(
+                status_code=400,
+                detail="A user with this email already exists.",
+            )
+        current_user.email = user_in.email
+    
+    db.add(current_user)
+    db.commit()
+    db.refresh(current_user)
+    return current_user
+
+
+@router.get("/{user_id}", response_model=schemas.User)
+def read_user_by_id(
+    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 = db.query(models.User).filter(models.User.id == user_id).first()
+    if user == current_user:
+        return user
+    if not current_user.is_admin:
+        raise HTTPException(
+            status_code=400, detail="The user doesn't have enough privileges"
+        )
+    if not user:
+        raise HTTPException(
+            status_code=404,
+            detail="The user with this id does not exist in the system",
+        )
+    return user
+
+
+@router.delete("/{user_id}", response_model=schemas.User)
+def delete_user(
+    user_id: int,
+    db: Session = Depends(deps.get_db),
+    current_user: models.User = Depends(deps.get_current_active_admin),
+) -> Any:
+    """
+    Delete a user.
+    """
+    user = db.query(models.User).filter(models.User.id == user_id).first()
+    if not user:
+        raise HTTPException(
+            status_code=404,
+            detail="The user with this id does not exist in the system",
+        )
+    if user.id == current_user.id:
+        raise HTTPException(
+            status_code=400,
+            detail="Users cannot delete themselves",
+        )
+    db.delete(user)
+    db.commit()
+    return user
--- a/app/api/routes.py
+++ b/app/api/routes.py
@ -0,0 +1,10 @@
+from fastapi import APIRouter
+
+from app.api.endpoints import users, products, cart, orders, auth
+
+api_router = APIRouter()
+api_router.include_router(auth.router, prefix="/auth", tags=["authentication"])
+api_router.include_router(users.router, prefix="/users", tags=["users"])
+api_router.include_router(products.router, prefix="/products", tags=["products"])
+api_router.include_router(cart.router, prefix="/cart", tags=["cart"])
+api_router.include_router(orders.router, prefix="/orders", tags=["orders"])
--- a/app/core/init.py
+++ b/app/core/init.py
--- a/app/core/config.py
+++ b/app/core/config.py
@ -0,0 +1,36 @@
+from typing import Any, Dict, List, Optional, Union
+from pathlib import Path
+
+from pydantic import AnyHttpUrl, BaseSettings, validator
+
+
+class Settings(BaseSettings):
+    API_V1_STR: str = "/api/v1"
+    PROJECT_NAME: str = "ECommerce API"
+    
+    # CORS Settings
+    BACKEND_CORS_ORIGINS: List[AnyHttpUrl] = []
+
+    @validator("BACKEND_CORS_ORIGINS", pre=True)
+    def assemble_cors_origins(cls, v: Union[str, List[str]]) -> Union[List[str], str]:
+        if isinstance(v, str) and not v.startswith("["):
+            return [i.strip() for i in v.split(",")]
+        elif isinstance(v, (list, str)):
+            return v
+        raise ValueError(v)
+
+    # Security Settings
+    SECRET_KEY: str = "supersecretkey"  # Change in production
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
+    
+    # Database Settings
+    DB_DIR = Path("/app") / "storage" / "db"
+    DB_DIR.mkdir(parents=True, exist_ok=True)
+    SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
+
+    class Config:
+        case_sensitive = True
+
+
+settings = Settings()
--- a/app/core/security.py
+++ b/app/core/security.py
@ -0,0 +1,31 @@
+from datetime import datetime, timedelta
+from typing import Any, Union
+
+from jose import jwt
+from passlib.context import CryptContext
+
+from app.core.config import settings
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+
+def create_access_token(
+    subject: Union[str, Any], expires_delta: timedelta = None
+) -> str:
+    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:
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password: str) -> str:
+    return pwd_context.hash(password)
--- a/app/db/init.py
+++ b/app/db/init.py
--- a/app/db/session.py
+++ b/app/db/session.py
@ -0,0 +1,22 @@
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+
+from app.core.config import settings
+
+engine = create_engine(
+    settings.SQLALCHEMY_DATABASE_URL,
+    connect_args={"check_same_thread": False}  # Only needed for SQLite
+)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+Base = declarative_base()
+
+
+# Dependency for routes
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
--- a/app/models/init.py
+++ b/app/models/init.py
@ -0,0 +1,4 @@
+from app.models.user import User
+from app.models.product import Product
+from app.models.cart import CartItem
+from app.models.order import Order, OrderItem, OrderStatus
--- a/app/models/base.py
+++ b/app/models/base.py
@ -0,0 +1,15 @@
+from sqlalchemy import Column, Integer, DateTime
+from sqlalchemy.sql import func
+from app.db.session import Base
+
+
+class TimestampMixin:
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(
+        DateTime(timezone=True), server_default=func.now(), onupdate=func.now()
+    )
+
+
+class BaseModel(Base, TimestampMixin):
+    __abstract__ = True
+    id = Column(Integer, primary_key=True, index=True)
--- a/app/models/cart.py
+++ b/app/models/cart.py
@ -0,0 +1,15 @@
+from sqlalchemy import Column, Integer, ForeignKey
+from sqlalchemy.orm import relationship
+
+from app.models.base import BaseModel
+
+
+class CartItem(BaseModel):
+    __tablename__ = "cart_items"
+
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    product_id = Column(Integer, ForeignKey("products.id"), nullable=False)
+    quantity = Column(Integer, nullable=False, default=1)
+    
+    user = relationship("User", back_populates="cart_items")
+    product = relationship("Product", back_populates="cart_items")
--- a/app/models/order.py
+++ b/app/models/order.py
@ -0,0 +1,37 @@
+from sqlalchemy import Column, Integer, ForeignKey, Float, String, Enum
+from sqlalchemy.orm import relationship
+import enum
+
+from app.models.base import BaseModel
+
+
+class OrderStatus(str, enum.Enum):
+    PENDING = "pending"
+    PAID = "paid"
+    SHIPPED = "shipped"
+    DELIVERED = "delivered"
+    CANCELLED = "cancelled"
+
+
+class Order(BaseModel):
+    __tablename__ = "orders"
+
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+    total_amount = Column(Float, nullable=False)
+    status = Column(String, default=OrderStatus.PENDING, nullable=False)
+    shipping_address = Column(String, nullable=True)
+    
+    user = relationship("User", back_populates="orders")
+    items = relationship("OrderItem", back_populates="order", cascade="all, delete-orphan")
+
+
+class OrderItem(BaseModel):
+    __tablename__ = "order_items"
+
+    order_id = Column(Integer, ForeignKey("orders.id"), nullable=False)
+    product_id = Column(Integer, ForeignKey("products.id"), nullable=False)
+    quantity = Column(Integer, nullable=False)
+    unit_price = Column(Float, nullable=False)
+    
+    order = relationship("Order", back_populates="items")
+    product = relationship("Product", back_populates="order_items")
--- a/app/models/product.py
+++ b/app/models/product.py
@ -0,0 +1,18 @@
+from sqlalchemy import Column, String, Float, Integer, Text, Boolean
+from sqlalchemy.orm import relationship
+
+from app.models.base import BaseModel
+
+
+class Product(BaseModel):
+    __tablename__ = "products"
+
+    name = Column(String, index=True, nullable=False)
+    description = Column(Text, nullable=True)
+    price = Column(Float, nullable=False)
+    stock = Column(Integer, nullable=False, default=0)
+    image_url = Column(String, nullable=True)
+    is_active = Column(Boolean, default=True)
+    
+    order_items = relationship("OrderItem", back_populates="product")
+    cart_items = relationship("CartItem", back_populates="product")
--- a/app/models/user.py
+++ b/app/models/user.py
@ -0,0 +1,17 @@
+from sqlalchemy import Boolean, Column, String
+from sqlalchemy.orm import relationship
+
+from app.models.base import BaseModel
+
+
+class User(BaseModel):
+    __tablename__ = "users"
+
+    email = Column(String, unique=True, index=True, nullable=False)
+    password = Column(String, nullable=False)
+    full_name = Column(String, nullable=True)
+    is_active = Column(Boolean, default=True)
+    is_admin = Column(Boolean, default=False)
+    
+    orders = relationship("Order", back_populates="user", cascade="all, delete-orphan")
+    cart_items = relationship("CartItem", back_populates="user", cascade="all, delete-orphan")
--- a/app/schemas/init.py
+++ b/app/schemas/init.py
@ -0,0 +1,5 @@
+from app.schemas.user import User, UserCreate, UserInDB, UserUpdate
+from app.schemas.product import Product, ProductCreate, ProductUpdate
+from app.schemas.cart import CartItem, CartItemCreate, CartItemUpdate, CartItemWithProduct
+from app.schemas.order import Order, OrderCreate, OrderItem, OrderWithItems
+from app.schemas.token import Token, TokenPayload
--- a/app/schemas/cart.py
+++ b/app/schemas/cart.py
@ -0,0 +1,34 @@
+from typing import List, Optional
+
+from pydantic import BaseModel, Field
+
+from app.schemas.product import Product
+
+
+class CartItemBase(BaseModel):
+    product_id: int
+    quantity: int = Field(..., gt=0)
+
+
+class CartItemCreate(CartItemBase):
+    pass
+
+
+class CartItemUpdate(BaseModel):
+    quantity: int = Field(..., gt=0)
+
+
+class CartItemInDBBase(CartItemBase):
+    id: int
+    user_id: int
+
+    class Config:
+        orm_mode = True
+
+
+class CartItem(CartItemInDBBase):
+    pass
+
+
+class CartItemWithProduct(CartItemInDBBase):
+    product: Product
--- a/app/schemas/order.py
+++ b/app/schemas/order.py
@ -0,0 +1,62 @@
+from typing import List, Optional
+from datetime import datetime
+
+from pydantic import BaseModel, Field
+
+from app.models.order import OrderStatus
+from app.schemas.product import Product
+
+
+class OrderItemBase(BaseModel):
+    product_id: int
+    quantity: int = Field(..., gt=0)
+    unit_price: float = Field(..., gt=0)
+
+
+class OrderItemCreate(OrderItemBase):
+    pass
+
+
+class OrderItemInDBBase(OrderItemBase):
+    id: int
+    order_id: int
+
+    class Config:
+        orm_mode = True
+
+
+class OrderItem(OrderItemInDBBase):
+    pass
+
+
+class OrderItemWithProduct(OrderItemInDBBase):
+    product: Product
+
+
+class OrderBase(BaseModel):
+    total_amount: float = Field(..., gt=0)
+    status: OrderStatus = OrderStatus.PENDING
+    shipping_address: Optional[str] = None
+
+
+class OrderCreate(BaseModel):
+    shipping_address: Optional[str] = None
+    items: List[OrderItemCreate]
+
+
+class OrderInDBBase(OrderBase):
+    id: int
+    user_id: int
+    created_at: datetime
+    updated_at: datetime
+
+    class Config:
+        orm_mode = True
+
+
+class Order(OrderInDBBase):
+    pass
+
+
+class OrderWithItems(OrderInDBBase):
+    items: List[OrderItemWithProduct]
--- a/app/schemas/product.py
+++ b/app/schemas/product.py
@ -0,0 +1,36 @@
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+
+class ProductBase(BaseModel):
+    name: str
+    description: Optional[str] = None
+    price: float = Field(..., gt=0)
+    stock: int = Field(..., ge=0)
+    image_url: Optional[str] = None
+    is_active: bool = True
+
+
+class ProductCreate(ProductBase):
+    pass
+
+
+class ProductUpdate(BaseModel):
+    name: Optional[str] = None
+    description: Optional[str] = None
+    price: Optional[float] = Field(None, gt=0)
+    stock: Optional[int] = Field(None, ge=0)
+    image_url: Optional[str] = None
+    is_active: Optional[bool] = None
+
+
+class ProductInDBBase(ProductBase):
+    id: int
+
+    class Config:
+        orm_mode = True
+
+
+class Product(ProductInDBBase):
+    pass
--- a/app/schemas/token.py
+++ b/app/schemas/token.py
@ -0,0 +1,12 @@
+from typing import Optional
+
+from pydantic import BaseModel
+
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+
+class TokenPayload(BaseModel):
+    sub: Optional[int] = None
--- a/app/schemas/user.py
+++ b/app/schemas/user.py
@ -0,0 +1,36 @@
+from typing import Optional
+
+from pydantic import BaseModel, EmailStr
+
+
+class UserBase(BaseModel):
+    email: EmailStr
+    full_name: Optional[str] = None
+    is_active: Optional[bool] = True
+    is_admin: bool = False
+
+
+class UserCreate(UserBase):
+    password: str
+
+
+class UserUpdate(BaseModel):
+    email: Optional[EmailStr] = None
+    full_name: Optional[str] = None
+    password: Optional[str] = None
+    is_active: Optional[bool] = None
+
+
+class UserInDBBase(UserBase):
+    id: int
+
+    class Config:
+        orm_mode = True
+
+
+class User(UserInDBBase):
+    pass
+
+
+class UserInDB(UserInDBBase):
+    password: str
--- a/app/utils/init.py
+++ b/app/utils/init.py
--- a/main.py
+++ b/main.py
@ -0,0 +1,33 @@
+import uvicorn
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.api.routes import api_router
+from app.core.config import settings
+
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    openapi_url=f"{settings.API_V1_STR}/openapi.json"
+)
+
+# Set all CORS enabled origins
+if settings.BACKEND_CORS_ORIGINS:
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=[str(origin) for origin in settings.BACKEND_CORS_ORIGINS],
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+
+app.include_router(api_router, prefix=settings.API_V1_STR)
+
+@app.get("/health", tags=["Health"])
+def health_check():
+    """
+    Health check endpoint
+    """
+    return {"status": "healthy"}
+
+if __name__ == "__main__":
+    uvicorn.run("main:app", host="0.0.0.0", reload=True, port=8000)
--- a/requirements.txt
+++ b/requirements.txt
@ -0,0 +1,11 @@
+fastapi>=0.68.0
+uvicorn>=0.15.0
+sqlalchemy>=1.4.23
+passlib>=1.7.4
+bcrypt>=3.2.0
+pydantic>=1.8.2
+python-jose>=3.3.0
+python-multipart>=0.0.5
+alembic>=1.7.1
+email-validator>=1.1.3
+ruff>=0.0.269