Implement Insurance System API with FastAPI and SQLite

README.md

@@ -1,3 +1,110 @@
-# FastAPI Application
+# Insurance System API
 
-This is a FastAPI application bootstrapped by BackendIM, the AI-powered backend generation platform.
+A comprehensive API for managing insurance policies, customers, and claims built with FastAPI and SQLite.
+
+## Features
+
+- User authentication and authorization with JWT tokens
+- CRUD operations for customers, policies, and claims
+- Comprehensive database models with relationships
+- API documentation with Swagger UI and ReDoc
+- SQLite database with Alembic migrations
+
+## Requirements
+
+- Python 3.8+
+- SQLite
+
+## Environment Variables
+
+The application uses the following environment variables:
+
+- `SECRET_KEY`: JWT secret key (default: "supersecretkey")
+- `ACCESS_TOKEN_EXPIRE_MINUTES`: JWT token expiration time in minutes (default: 30)
+
+## Installation
+
+1. Clone the repository:
+
+```bash
+git clone <repository-url>
+cd insurance-system-api
+```
+
+2. Create a virtual environment:
+
+```bash
+python -m venv venv
+source venv/bin/activate  # On Windows: venv\Scripts\activate
+```
+
+3. Install dependencies:
+
+```bash
+pip install -r requirements.txt
+```
+
+4. Run database migrations:
+
+```bash
+alembic upgrade head
+```
+
+## Running the Application
+
+Start the application with:
+
+```bash
+uvicorn main:app --reload
+```
+
+The API will be available at http://localhost:8000.
+
+- API documentation: http://localhost:8000/docs
+- Alternative API documentation: http://localhost:8000/redoc
+- OpenAPI schema: http://localhost:8000/openapi.json
+
+## API Endpoints
+
+### Authentication
+
+- `POST /api/v1/auth/register`: Register a new user
+- `POST /api/v1/auth/token`: Login and get access token
+- `GET /api/v1/auth/me`: Get current user information
+
+### Customers
+
+- `GET /api/v1/customers`: Get all customers
+- `POST /api/v1/customers`: Create a new customer
+- `GET /api/v1/customers/{customer_id}`: Get a specific customer
+- `PUT /api/v1/customers/{customer_id}`: Update a customer
+- `DELETE /api/v1/customers/{customer_id}`: Delete a customer
+
+### Policies
+
+- `GET /api/v1/policies`: Get all policies
+- `POST /api/v1/policies`: Create a new policy
+- `GET /api/v1/policies/{policy_id}`: Get a specific policy
+- `PUT /api/v1/policies/{policy_id}`: Update a policy
+- `DELETE /api/v1/policies/{policy_id}`: Delete a policy
+
+### Claims
+
+- `GET /api/v1/claims`: Get all claims
+- `POST /api/v1/claims`: Create a new claim
+- `GET /api/v1/claims/{claim_id}`: Get a specific claim
+- `PUT /api/v1/claims/{claim_id}`: Update a claim
+- `DELETE /api/v1/claims/{claim_id}`: Delete a claim
+
+## Database Schema
+
+The application uses the following database models:
+
+- `User`: Authentication and system users
+- `Customer`: Insurance customers
+- `Policy`: Insurance policies
+- `Claim`: Insurance claims
+
+## License
+
+This project is licensed under the MIT License - see the LICENSE file for details.

alembic.ini

@@ -0,0 +1,102 @@
+# 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
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# 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.
+# The path separator used here should be the separator specified by "version_path_separator" below.
+# version_locations = %(here)s/bar:%(here)s/bat:migrations/versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. The default within new alembic.ini files is "os", which uses os.pathsep.
+# If this key is omitted entirely, it falls back to the legacy behavior of splitting on spaces and/or commas.
+# Valid values for version_path_separator are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # Use os.pathsep. Default configuration used for new projects.
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# SQLite URL example - using absolute path per project requirements
+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 REVISION_SCRIPT_FILENAME
+
+# 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/__init__.py

@@ -0,0 +1 @@
+# Insurance System API package

app/api/__init__.py

@@ -0,0 +1 @@
+# API package

app/api/deps.py

@@ -0,0 +1,54 @@
+from typing import Generator
+
+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 crud, models, schemas
+from app.core.config import settings
+from app.db.session import SessionLocal
+
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl=f"{settings.API_V1_STR}/auth/token")
+
+def get_db() -> Generator:
+    try:
+        db = SessionLocal()
+        yield db
+    finally:
+        db.close()
+
+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 = crud.user.get(db, id=token_data.sub)
+    if not user:
+        raise HTTPException(status_code=404, detail="User not found")
+    return user
+
+def get_current_active_user(
+    current_user: models.User = Depends(get_current_user),
+) -> models.User:
+    if not crud.user.is_active(current_user):
+        raise HTTPException(status_code=400, detail="Inactive user")
+    return current_user
+
+def get_current_active_superuser(
+    current_user: models.User = Depends(get_current_user),
+) -> models.User:
+    if not crud.user.is_superuser(current_user):
+        raise HTTPException(
+            status_code=status.HTTP_403_FORBIDDEN, detail="Not enough permissions"
+        )
+    return current_user

app/api/v1/__init__.py

@@ -0,0 +1 @@
+# API v1 package

app/api/v1/api.py

@@ -0,0 +1,11 @@
+from fastapi import APIRouter
+
+from app.api.v1.endpoints import customers, policies, claims, auth
+
+api_router = APIRouter()
+
+# Include routers for different resources
+api_router.include_router(auth.router, prefix="/auth", tags=["Authentication"])
+api_router.include_router(customers.router, prefix="/customers", tags=["Customers"])
+api_router.include_router(policies.router, prefix="/policies", tags=["Policies"])
+api_router.include_router(claims.router, prefix="/claims", tags=["Claims"])

app/api/v1/endpoints/__init__.py

@@ -0,0 +1 @@
+# API endpoints package

app/api/v1/endpoints/auth.py

@@ -0,0 +1,67 @@
+from datetime import timedelta
+from typing import Any
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from fastapi.security import OAuth2PasswordRequestForm
+from sqlalchemy.orm import Session
+
+from app import crud, models, schemas
+from app.api.deps import get_current_active_user, get_db
+from app.core.config import settings
+from app.core.security import create_access_token
+
+router = APIRouter()
+
+@router.post("/token", response_model=schemas.Token)
+def login_access_token(
+    db: Session = Depends(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",
+        )
+    elif 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": create_access_token(
+            user.id, expires_delta=access_token_expires
+        ),
+        "token_type": "bearer",
+    }
+
+@router.post("/register", response_model=schemas.User, status_code=status.HTTP_201_CREATED)
+def register_user(
+    *,
+    db: Session = Depends(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 in the system.",
+        )
+    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(get_current_active_user),
+) -> Any:
+    """
+    Get current user.
+    """
+    return current_user

app/api/v1/endpoints/claims.py

@@ -0,0 +1,115 @@
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app import crud, models
+from app.api.deps import get_current_active_user, get_db
+from app.schemas.claim import Claim, ClaimCreate, ClaimUpdate
+
+router = APIRouter()
+
+@router.get("/", response_model=List[Claim])
+def read_claims(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    policy_id: Optional[int] = None,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Retrieve claims.
+    """
+    if policy_id:
+        claims = crud.claim.get_by_policy(
+            db, policy_id=policy_id, skip=skip, limit=limit
+        )
+    else:
+        claims = crud.claim.get_multi(db, skip=skip, limit=limit)
+    return claims
+
+@router.post("/", response_model=Claim, status_code=status.HTTP_201_CREATED)
+def create_claim(
+    *,
+    db: Session = Depends(get_db),
+    claim_in: ClaimCreate,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Create new claim.
+    """
+    # Check if policy exists
+    policy = crud.policy.get(db, id=claim_in.policy_id)
+    if not policy:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Policy not found",
+        )
+    
+    # Check if claim number already exists
+    claim = crud.claim.get_by_claim_number(db, claim_number=claim_in.claim_number)
+    if claim:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A claim with this claim number already exists",
+        )
+    
+    claim = crud.claim.create(db, obj_in=claim_in)
+    return claim
+
+@router.get("/{claim_id}", response_model=Claim)
+def read_claim(
+    *,
+    db: Session = Depends(get_db),
+    claim_id: int,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Get claim by ID.
+    """
+    claim = crud.claim.get(db, id=claim_id)
+    if not claim:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Claim not found",
+        )
+    return claim
+
+@router.put("/{claim_id}", response_model=Claim)
+def update_claim(
+    *,
+    db: Session = Depends(get_db),
+    claim_id: int,
+    claim_in: ClaimUpdate,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Update a claim.
+    """
+    claim = crud.claim.get(db, id=claim_id)
+    if not claim:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Claim not found",
+        )
+    claim = crud.claim.update(db, db_obj=claim, obj_in=claim_in)
+    return claim
+
+@router.delete("/{claim_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None)
+def delete_claim(
+    *,
+    db: Session = Depends(get_db),
+    claim_id: int,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Delete a claim.
+    """
+    claim = crud.claim.get(db, id=claim_id)
+    if not claim:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Claim not found",
+        )
+    crud.claim.remove(db, id=claim_id)
+    return None

app/api/v1/endpoints/customers.py

@@ -0,0 +1,109 @@
+from typing import Any, List
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app import crud, models
+from app.api.deps import get_current_active_user, get_db
+from app.schemas.customer import Customer, CustomerCreate, CustomerUpdate
+
+router = APIRouter()
+
+@router.get("/", response_model=List[Customer])
+def read_customers(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Retrieve customers.
+    """
+    customers = crud.customer.get_multi(db, skip=skip, limit=limit)
+    return customers
+
+@router.post("/", response_model=Customer, status_code=status.HTTP_201_CREATED)
+def create_customer(
+    *,
+    db: Session = Depends(get_db),
+    customer_in: CustomerCreate,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Create new customer.
+    """
+    customer = crud.customer.get_by_email(db, email=customer_in.email)
+    if customer:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A customer with this email already exists in the system.",
+        )
+    customer = crud.customer.create(db, obj_in=customer_in)
+    return customer
+
+@router.get("/{customer_id}", response_model=Customer)
+def read_customer(
+    *,
+    db: Session = Depends(get_db),
+    customer_id: int,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Get customer by ID.
+    """
+    customer = crud.customer.get(db, id=customer_id)
+    if not customer:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Customer not found",
+        )
+    return customer
+
+@router.put("/{customer_id}", response_model=Customer)
+def update_customer(
+    *,
+    db: Session = Depends(get_db),
+    customer_id: int,
+    customer_in: CustomerUpdate,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Update a customer.
+    """
+    customer = crud.customer.get(db, id=customer_id)
+    if not customer:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Customer not found",
+        )
+    
+    # Check if email exists and it's not the customer's own email
+    if customer_in.email and customer_in.email != customer.email:
+        db_customer = crud.customer.get_by_email(db, email=customer_in.email)
+        if db_customer:
+            raise HTTPException(
+                status_code=status.HTTP_400_BAD_REQUEST,
+                detail="A customer with this email already exists in the system.",
+            )
+    
+    customer = crud.customer.update(db, db_obj=customer, obj_in=customer_in)
+    return customer
+
+@router.delete("/{customer_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None)
+def delete_customer(
+    *,
+    db: Session = Depends(get_db),
+    customer_id: int,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Delete a customer.
+    """
+    customer = crud.customer.get(db, id=customer_id)
+    if not customer:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Customer not found",
+        )
+    crud.customer.remove(db, id=customer_id)
+    return None

app/api/v1/endpoints/policies.py

@@ -0,0 +1,115 @@
+from typing import Any, List, Optional
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.orm import Session
+
+from app import crud, models
+from app.api.deps import get_current_active_user, get_db
+from app.schemas.policy import Policy, PolicyCreate, PolicyUpdate
+
+router = APIRouter()
+
+@router.get("/", response_model=List[Policy])
+def read_policies(
+    db: Session = Depends(get_db),
+    skip: int = 0,
+    limit: int = 100,
+    customer_id: Optional[int] = None,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Retrieve policies.
+    """
+    if customer_id:
+        policies = crud.policy.get_by_customer(
+            db, customer_id=customer_id, skip=skip, limit=limit
+        )
+    else:
+        policies = crud.policy.get_multi(db, skip=skip, limit=limit)
+    return policies
+
+@router.post("/", response_model=Policy, status_code=status.HTTP_201_CREATED)
+def create_policy(
+    *,
+    db: Session = Depends(get_db),
+    policy_in: PolicyCreate,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Create new policy.
+    """
+    # Check if customer exists
+    customer = crud.customer.get(db, id=policy_in.customer_id)
+    if not customer:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Customer not found",
+        )
+    
+    # Check if policy number already exists
+    policy = crud.policy.get_by_policy_number(db, policy_number=policy_in.policy_number)
+    if policy:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="A policy with this policy number already exists",
+        )
+    
+    policy = crud.policy.create(db, obj_in=policy_in)
+    return policy
+
+@router.get("/{policy_id}", response_model=Policy)
+def read_policy(
+    *,
+    db: Session = Depends(get_db),
+    policy_id: int,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Get policy by ID.
+    """
+    policy = crud.policy.get(db, id=policy_id)
+    if not policy:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Policy not found",
+        )
+    return policy
+
+@router.put("/{policy_id}", response_model=Policy)
+def update_policy(
+    *,
+    db: Session = Depends(get_db),
+    policy_id: int,
+    policy_in: PolicyUpdate,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Update a policy.
+    """
+    policy = crud.policy.get(db, id=policy_id)
+    if not policy:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Policy not found",
+        )
+    policy = crud.policy.update(db, db_obj=policy, obj_in=policy_in)
+    return policy
+
+@router.delete("/{policy_id}", status_code=status.HTTP_204_NO_CONTENT, response_model=None)
+def delete_policy(
+    *,
+    db: Session = Depends(get_db),
+    policy_id: int,
+    current_user: models.User = Depends(get_current_active_user),
+) -> Any:
+    """
+    Delete a policy.
+    """
+    policy = crud.policy.get(db, id=policy_id)
+    if not policy:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Policy not found",
+        )
+    crud.policy.remove(db, id=policy_id)
+    return None

app/auth/__init__.py

@@ -0,0 +1 @@
+# Authentication package

app/core/__init__.py

@@ -0,0 +1 @@
+# Core package

app/core/config.py

@@ -0,0 +1,33 @@
+import os
+from pathlib import Path
+from typing import List
+from pydantic_settings import BaseSettings
+
+class Settings(BaseSettings):
+    # API Settings
+    PROJECT_NAME: str = "Insurance System API"
+    PROJECT_DESCRIPTION: str = "API for managing insurance policies, customers, and claims"
+    PROJECT_VERSION: str = "0.1.0"
+    API_V1_STR: str = "/api/v1"
+    
+    # Database Settings
+    DB_DIR: Path = Path("/app") / "storage" / "db"
+    SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_DIR}/db.sqlite"
+    
+    # Security Settings
+    SECRET_KEY: str = os.getenv("SECRET_KEY", "supersecretkey")
+    ALGORITHM: str = "HS256"
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
+    
+    # CORS Settings
+    BACKEND_CORS_ORIGINS: List[str] = ["*"]
+    
+    class Config:
+        env_file = ".env"
+        case_sensitive = True
+
+# Create settings instance
+settings = Settings()
+
+# Ensure database directory exists
+settings.DB_DIR.mkdir(parents=True, exist_ok=True)

app/core/security.py

@@ -0,0 +1,28 @@
+from datetime import datetime, timedelta
+from typing import Any, Union, Optional
+
+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: Optional[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)

app/crud/__init__.py

@@ -0,0 +1,7 @@
+# CRUD operations package
+from app.crud.crud_user import user
+from app.crud.crud_customer import customer
+from app.crud.crud_policy import policy
+from app.crud.crud_claim import claim
+
+__all__ = ["user", "customer", "policy", "claim"]

app/crud/base.py

@@ -0,0 +1,65 @@
+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.base import Base
+
+ModelType = TypeVar("ModelType", bound=Base)
+CreateSchemaType = TypeVar("CreateSchemaType", bound=BaseModel)
+UpdateSchemaType = TypeVar("UpdateSchemaType", bound=BaseModel)
+
+class CRUDBase(Generic[ModelType, CreateSchemaType, UpdateSchemaType]):
+    def __init__(self, model: Type[ModelType]):
+        """
+        CRUD object with default methods to Create, Read, Update, Delete (CRUD).
+        
+        **Parameters**
+        
+        * `model`: A SQLAlchemy model class
+        * `schema`: A Pydantic model (schema) class
+        """
+        self.model = model
+
+    def get(self, db: Session, id: Any) -> Optional[ModelType]:
+        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]:
+        return db.query(self.model).offset(skip).limit(limit).all()
+
+    def create(self, db: Session, *, obj_in: CreateSchemaType) -> ModelType:
+        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:
+        obj_data = jsonable_encoder(db_obj)
+        if isinstance(obj_in, dict):
+            update_data = obj_in
+        else:
+            update_data = obj_in.dict(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:
+        obj = db.query(self.model).get(id)
+        db.delete(obj)
+        db.commit()
+        return obj

app/crud/crud_claim.py

@@ -0,0 +1,31 @@
+from typing import Optional, List
+from sqlalchemy.orm import Session
+
+from app.crud.base import CRUDBase
+from app.models.claim import Claim
+from app.schemas.claim import ClaimCreate, ClaimUpdate
+
+class CRUDClaim(CRUDBase[Claim, ClaimCreate, ClaimUpdate]):
+    def get_by_claim_number(self, db: Session, *, claim_number: str) -> Optional[Claim]:
+        return db.query(Claim).filter(Claim.claim_number == claim_number).first()
+
+    def get_by_policy(self, db: Session, *, policy_id: int, skip: int = 0, limit: int = 100) -> List[Claim]:
+        return db.query(Claim).filter(Claim.policy_id == policy_id).offset(skip).limit(limit).all()
+    
+    def create(self, db: Session, *, obj_in: ClaimCreate) -> Claim:
+        db_obj = Claim(
+            claim_number=obj_in.claim_number,
+            policy_id=obj_in.policy_id,
+            incident_date=obj_in.incident_date,
+            description=obj_in.description,
+            claim_amount=obj_in.claim_amount,
+            status=obj_in.status,
+            settlement_amount=obj_in.settlement_amount,
+            settlement_date=obj_in.settlement_date
+        )
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+claim = CRUDClaim(Claim)

app/crud/crud_customer.py

@@ -0,0 +1,27 @@
+from typing import Optional
+from sqlalchemy.orm import Session
+
+from app.crud.base import CRUDBase
+from app.models.customer import Customer
+from app.schemas.customer import CustomerCreate, CustomerUpdate
+
+class CRUDCustomer(CRUDBase[Customer, CustomerCreate, CustomerUpdate]):
+    def get_by_email(self, db: Session, *, email: str) -> Optional[Customer]:
+        return db.query(Customer).filter(Customer.email == email).first()
+    
+    def create(self, db: Session, *, obj_in: CustomerCreate) -> Customer:
+        # Create a dict without policies (which are handled separately)
+        db_obj = Customer(
+            first_name=obj_in.first_name,
+            last_name=obj_in.last_name,
+            email=obj_in.email,
+            phone_number=obj_in.phone_number,
+            address=obj_in.address,
+            date_of_birth=obj_in.date_of_birth
+        )
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+customer = CRUDCustomer(Customer)

app/crud/crud_policy.py

@@ -0,0 +1,33 @@
+from typing import Optional, List
+from sqlalchemy.orm import Session
+
+from app.crud.base import CRUDBase
+from app.models.policy import Policy
+from app.schemas.policy import PolicyCreate, PolicyUpdate
+
+class CRUDPolicy(CRUDBase[Policy, PolicyCreate, PolicyUpdate]):
+    def get_by_policy_number(self, db: Session, *, policy_number: str) -> Optional[Policy]:
+        return db.query(Policy).filter(Policy.policy_number == policy_number).first()
+
+    def get_by_customer(self, db: Session, *, customer_id: int, skip: int = 0, limit: int = 100) -> List[Policy]:
+        return db.query(Policy).filter(Policy.customer_id == customer_id).offset(skip).limit(limit).all()
+    
+    def create(self, db: Session, *, obj_in: PolicyCreate) -> Policy:
+        db_obj = Policy(
+            policy_number=obj_in.policy_number,
+            customer_id=obj_in.customer_id,
+            policy_type=obj_in.policy_type,
+            status=obj_in.status,
+            start_date=obj_in.start_date,
+            end_date=obj_in.end_date,
+            premium_amount=obj_in.premium_amount,
+            coverage_amount=obj_in.coverage_amount,
+            deductible_amount=obj_in.deductible_amount,
+            description=obj_in.description
+        )
+        db.add(db_obj)
+        db.commit()
+        db.refresh(db_obj)
+        return db_obj
+
+policy = CRUDPolicy(Policy)

app/crud/crud_user.py

@@ -0,0 +1,54 @@
+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]):
+    def get_by_email(self, db: Session, *, email: str) -> Optional[User]:
+        return db.query(User).filter(User.email == email).first()
+
+    def create(self, db: Session, *, obj_in: UserCreate) -> User:
+        db_obj = User(
+            email=obj_in.email,
+            hashed_password=get_password_hash(obj_in.password),
+            full_name=obj_in.full_name,
+            is_superuser=False,
+            is_active=True,
+        )
+        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:
+        if isinstance(obj_in, dict):
+            update_data = obj_in
+        else:
+            update_data = obj_in.dict(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]:
+        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:
+        return user.is_active
+
+    def is_superuser(self, user: User) -> bool:
+        return user.is_superuser
+
+user = CRUDUser(User)

app/db/__init__.py

@@ -0,0 +1 @@
+# Database package

app/db/base.py

@@ -0,0 +1,5 @@
+# Import all the models to ensure they are registered with SQLAlchemy
+from sqlalchemy.ext.declarative import declarative_base
+
+# Create Base class for SQLAlchemy models
+Base = declarative_base()

app/db/session.py

@@ -0,0 +1,21 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+
+from app.core.config import settings
+
+# Create SQLAlchemy engine
+engine = create_engine(
+    settings.SQLALCHEMY_DATABASE_URL,
+    connect_args={"check_same_thread": False}  # Only needed for SQLite
+)
+
+# Create sessionmaker
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+# Dependency to get DB session
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

app/models/__init__.py

@@ -0,0 +1,7 @@
+# Database models package
+from app.models.user import User
+from app.models.customer import Customer
+from app.models.policy import Policy, PolicyType, PolicyStatus
+from app.models.claim import Claim, ClaimStatus
+
+__all__ = ["User", "Customer", "Policy", "PolicyType", "PolicyStatus", "Claim", "ClaimStatus"]

app/models/claim.py

@@ -0,0 +1,33 @@
+from sqlalchemy import Column, Integer, String, DateTime, Float, ForeignKey, Enum
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+import enum
+
+from app.db.base import Base
+
+class ClaimStatus(str, enum.Enum):
+    SUBMITTED = "submitted"
+    UNDER_REVIEW = "under_review"
+    APPROVED = "approved"
+    DENIED = "denied"
+    PAID = "paid"
+    CLOSED = "closed"
+
+class Claim(Base):
+    __tablename__ = "claims"
+
+    id = Column(Integer, primary_key=True, index=True)
+    claim_number = Column(String, unique=True, index=True, nullable=False)
+    policy_id = Column(Integer, ForeignKey("policies.id"), nullable=False)
+    incident_date = Column(DateTime, nullable=False)
+    report_date = Column(DateTime, nullable=False, server_default=func.now())
+    description = Column(String, nullable=False)
+    claim_amount = Column(Float, nullable=False)
+    status = Column(Enum(ClaimStatus), default=ClaimStatus.SUBMITTED, nullable=False)
+    settlement_amount = Column(Float, nullable=True)
+    settlement_date = Column(DateTime, nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    
+    # Relationships
+    policy = relationship("Policy", back_populates="claims")

app/models/customer.py

@@ -0,0 +1,21 @@
+from sqlalchemy import Column, Integer, String, DateTime
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+
+from app.db.base import Base
+
+class Customer(Base):
+    __tablename__ = "customers"
+
+    id = Column(Integer, primary_key=True, index=True)
+    first_name = Column(String, nullable=False)
+    last_name = Column(String, nullable=False)
+    email = Column(String, unique=True, index=True, nullable=False)
+    phone_number = Column(String, nullable=True)
+    address = Column(String, nullable=True)
+    date_of_birth = Column(DateTime, nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    
+    # Relationships
+    policies = relationship("Policy", back_populates="customer", cascade="all, delete-orphan")

app/models/policy.py

@@ -0,0 +1,40 @@
+from sqlalchemy import Column, Integer, String, DateTime, Float, ForeignKey, Enum
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+import enum
+
+from app.db.base import Base
+
+class PolicyType(str, enum.Enum):
+    AUTO = "auto"
+    HOME = "home"
+    LIFE = "life"
+    HEALTH = "health"
+    TRAVEL = "travel"
+
+class PolicyStatus(str, enum.Enum):
+    ACTIVE = "active"
+    EXPIRED = "expired"
+    CANCELLED = "cancelled"
+    PENDING = "pending"
+
+class Policy(Base):
+    __tablename__ = "policies"
+
+    id = Column(Integer, primary_key=True, index=True)
+    policy_number = Column(String, unique=True, index=True, nullable=False)
+    customer_id = Column(Integer, ForeignKey("customers.id"), nullable=False)
+    policy_type = Column(Enum(PolicyType), nullable=False)
+    status = Column(Enum(PolicyStatus), default=PolicyStatus.PENDING, nullable=False)
+    start_date = Column(DateTime, nullable=False)
+    end_date = Column(DateTime, nullable=False)
+    premium_amount = Column(Float, nullable=False)
+    coverage_amount = Column(Float, nullable=False)
+    deductible_amount = Column(Float, nullable=True)
+    description = Column(String, nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+    
+    # Relationships
+    customer = relationship("Customer", back_populates="policies")
+    claims = relationship("Claim", back_populates="policy", cascade="all, delete-orphan")

app/models/user.py

@@ -0,0 +1,16 @@
+from sqlalchemy import Boolean, Column, Integer, String, DateTime
+from sqlalchemy.sql import func
+
+from app.db.base import Base
+
+class User(Base):
+    __tablename__ = "users"
+
+    id = Column(Integer, primary_key=True, index=True)
+    email = Column(String, unique=True, index=True, nullable=False)
+    hashed_password = Column(String, nullable=False)
+    full_name = Column(String, nullable=True)
+    is_active = Column(Boolean, default=True)
+    is_superuser = Column(Boolean, default=False)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())

app/schemas/__init__.py

@@ -0,0 +1,14 @@
+# Pydantic schemas package
+from app.schemas.user import User, UserCreate, UserUpdate, UserInDB
+from app.schemas.customer import Customer, CustomerCreate, CustomerUpdate, CustomerInDB
+from app.schemas.policy import Policy, PolicyCreate, PolicyUpdate, PolicyInDB
+from app.schemas.claim import Claim, ClaimCreate, ClaimUpdate, ClaimInDB
+from app.schemas.token import Token, TokenPayload
+
+__all__ = [
+    "User", "UserCreate", "UserUpdate", "UserInDB",
+    "Customer", "CustomerCreate", "CustomerUpdate", "CustomerInDB",
+    "Policy", "PolicyCreate", "PolicyUpdate", "PolicyInDB",
+    "Claim", "ClaimCreate", "ClaimUpdate", "ClaimInDB",
+    "Token", "TokenPayload"
+]

app/schemas/claim.py

@@ -0,0 +1,46 @@
+from typing import Optional
+from datetime import datetime, date
+from pydantic import BaseModel, Field
+
+from app.models.claim import ClaimStatus
+
+# Shared properties
+class ClaimBase(BaseModel):
+    claim_number: str
+    policy_id: int
+    incident_date: date
+    description: str
+    claim_amount: float = Field(..., gt=0)
+    status: ClaimStatus = ClaimStatus.SUBMITTED
+    settlement_amount: Optional[float] = Field(None, ge=0)
+    settlement_date: Optional[date] = None
+
+# Properties to receive via API on creation
+class ClaimCreate(ClaimBase):
+    pass
+
+# Properties to receive via API on update
+class ClaimUpdate(BaseModel):
+    description: Optional[str] = None
+    claim_amount: Optional[float] = Field(None, gt=0)
+    status: Optional[ClaimStatus] = None
+    settlement_amount: Optional[float] = Field(None, ge=0)
+    settlement_date: Optional[date] = None
+
+# Properties shared by models stored in DB
+class ClaimInDBBase(ClaimBase):
+    id: int
+    report_date: datetime
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+# Additional properties to return via API
+class Claim(ClaimInDBBase):
+    pass
+
+# Additional properties stored in DB
+class ClaimInDB(ClaimInDBBase):
+    pass

app/schemas/customer.py

@@ -0,0 +1,39 @@
+from typing import Optional
+from datetime import datetime, date
+from pydantic import BaseModel, EmailStr
+
+# Shared properties
+class CustomerBase(BaseModel):
+    first_name: str
+    last_name: str
+    email: EmailStr
+    phone_number: Optional[str] = None
+    address: Optional[str] = None
+    date_of_birth: Optional[date] = None
+
+# Properties to receive via API on creation
+class CustomerCreate(CustomerBase):
+    pass
+
+# Properties to receive via API on update
+class CustomerUpdate(CustomerBase):
+    first_name: Optional[str] = None
+    last_name: Optional[str] = None
+    email: Optional[EmailStr] = None
+
+# Properties shared by models stored in DB
+class CustomerInDBBase(CustomerBase):
+    id: int
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+# Additional properties to return via API
+class Customer(CustomerInDBBase):
+    pass
+
+# Additional properties stored in DB
+class CustomerInDB(CustomerInDBBase):
+    pass

app/schemas/policy.py

@@ -0,0 +1,50 @@
+from typing import Optional
+from datetime import datetime, date
+from pydantic import BaseModel, Field
+
+from app.models.policy import PolicyType, PolicyStatus
+
+# Shared properties
+class PolicyBase(BaseModel):
+    policy_number: str
+    customer_id: int
+    policy_type: PolicyType
+    status: PolicyStatus = PolicyStatus.PENDING
+    start_date: date
+    end_date: date
+    premium_amount: float = Field(..., gt=0)
+    coverage_amount: float = Field(..., gt=0)
+    deductible_amount: Optional[float] = Field(None, ge=0)
+    description: Optional[str] = None
+
+# Properties to receive via API on creation
+class PolicyCreate(PolicyBase):
+    pass
+
+# Properties to receive via API on update
+class PolicyUpdate(BaseModel):
+    policy_type: Optional[PolicyType] = None
+    status: Optional[PolicyStatus] = None
+    start_date: Optional[date] = None
+    end_date: Optional[date] = None
+    premium_amount: Optional[float] = Field(None, gt=0)
+    coverage_amount: Optional[float] = Field(None, gt=0)
+    deductible_amount: Optional[float] = Field(None, ge=0)
+    description: Optional[str] = None
+
+# Properties shared by models stored in DB
+class PolicyInDBBase(PolicyBase):
+    id: int
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+# Additional properties to return via API
+class Policy(PolicyInDBBase):
+    pass
+
+# Additional properties stored in DB
+class PolicyInDB(PolicyInDBBase):
+    pass

app/schemas/token.py

@@ -0,0 +1,9 @@
+from typing import Optional
+from pydantic import BaseModel
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+class TokenPayload(BaseModel):
+    sub: Optional[int] = None

app/schemas/user.py

@@ -0,0 +1,34 @@
+from typing import Optional
+from datetime import datetime
+from pydantic import BaseModel, EmailStr
+
+# Shared properties
+class UserBase(BaseModel):
+    email: EmailStr
+    full_name: Optional[str] = None
+    is_active: bool = True
+
+# Properties to receive via API on creation
+class UserCreate(UserBase):
+    password: str
+
+# Properties to receive via API on update
+class UserUpdate(UserBase):
+    password: Optional[str] = None
+
+# Properties shared by models stored in DB
+class UserInDBBase(UserBase):
+    id: int
+    created_at: datetime
+    updated_at: Optional[datetime] = None
+
+    class Config:
+        from_attributes = True
+
+# Additional properties to return via API
+class User(UserInDBBase):
+    pass
+
+# Additional properties stored in DB but not returned by API
+class UserInDB(UserInDBBase):
+    hashed_password: str

main.py

@@ -0,0 +1,45 @@
+import uvicorn
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import JSONResponse
+
+from app.api.v1.api import api_router
+from app.core.config import settings
+
+app = FastAPI(
+    title=settings.PROJECT_NAME,
+    description=settings.PROJECT_DESCRIPTION,
+    version=settings.PROJECT_VERSION,
+    openapi_url="/openapi.json",
+    docs_url="/docs",
+    redoc_url="/redoc",
+)
+
+# Set up CORS middleware
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# Include API router
+app.include_router(api_router, prefix="/api/v1")
+
+@app.get("/", response_class=JSONResponse)
+async def root():
+    """Root endpoint - Returns basic service information."""
+    return {
+        "title": settings.PROJECT_NAME,
+        "docs": "/docs",
+        "health": "/health"
+    }
+
+@app.get("/health", response_class=JSONResponse)
+async def health_check():
+    """Health check endpoint."""
+    return {"status": "healthy"}
+
+if __name__ == "__main__":
+    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True)

migrations/__init__.py

@@ -0,0 +1 @@
+# Migrations package

migrations/env.py

@@ -0,0 +1,85 @@
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+from alembic import context
+
+# Import the Base model for the database schema
+from app.db.base import Base
+
+# 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.
+if config.config_file_name is not None:
+    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() -> None:
+    """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() -> None:
+    """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,  # This is important for SQLite migrations
+            compare_type=True,
+        )
+
+        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() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

migrations/versions/1_initial_migration.py

@@ -0,0 +1,113 @@
+"""Initial migration
+
+Revision ID: 1_initial_migration
+Revises: 
+Create Date: 2023-08-01 12:00:00.000000
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '1_initial_migration'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Create users table
+    op.create_table(
+        'users',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('email', sa.String(), nullable=False),
+        sa.Column('hashed_password', sa.String(), nullable=False),
+        sa.Column('full_name', sa.String(), nullable=True),
+        sa.Column('is_active', sa.Boolean(), nullable=True),
+        sa.Column('is_superuser', sa.Boolean(), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), 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 customers table
+    op.create_table(
+        'customers',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('first_name', sa.String(), nullable=False),
+        sa.Column('last_name', sa.String(), nullable=False),
+        sa.Column('email', sa.String(), nullable=False),
+        sa.Column('phone_number', sa.String(), nullable=True),
+        sa.Column('address', sa.String(), nullable=True),
+        sa.Column('date_of_birth', sa.DateTime(), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_customers_email'), 'customers', ['email'], unique=True)
+    op.create_index(op.f('ix_customers_id'), 'customers', ['id'], unique=False)
+    
+    # Create policies table
+    op.create_table(
+        'policies',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('policy_number', sa.String(), nullable=False),
+        sa.Column('customer_id', sa.Integer(), nullable=False),
+        sa.Column('policy_type', sa.Enum('auto', 'home', 'life', 'health', 'travel', name='policytype'), nullable=False),
+        sa.Column('status', sa.Enum('active', 'expired', 'cancelled', 'pending', name='policystatus'), nullable=False),
+        sa.Column('start_date', sa.DateTime(), nullable=False),
+        sa.Column('end_date', sa.DateTime(), nullable=False),
+        sa.Column('premium_amount', sa.Float(), nullable=False),
+        sa.Column('coverage_amount', sa.Float(), nullable=False),
+        sa.Column('deductible_amount', sa.Float(), nullable=True),
+        sa.Column('description', sa.String(), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
+        sa.ForeignKeyConstraint(['customer_id'], ['customers.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_policies_id'), 'policies', ['id'], unique=False)
+    op.create_index(op.f('ix_policies_policy_number'), 'policies', ['policy_number'], unique=True)
+    
+    # Create claims table
+    op.create_table(
+        'claims',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('claim_number', sa.String(), nullable=False),
+        sa.Column('policy_id', sa.Integer(), nullable=False),
+        sa.Column('incident_date', sa.DateTime(), nullable=False),
+        sa.Column('report_date', sa.DateTime(), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=False),
+        sa.Column('description', sa.String(), nullable=False),
+        sa.Column('claim_amount', sa.Float(), nullable=False),
+        sa.Column('status', sa.Enum('submitted', 'under_review', 'approved', 'denied', 'paid', 'closed', name='claimstatus'), nullable=False),
+        sa.Column('settlement_amount', sa.Float(), nullable=True),
+        sa.Column('settlement_date', sa.DateTime(), nullable=True),
+        sa.Column('created_at', sa.DateTime(timezone=True), server_default=sa.text('(CURRENT_TIMESTAMP)'), nullable=True),
+        sa.Column('updated_at', sa.DateTime(timezone=True), nullable=True),
+        sa.ForeignKeyConstraint(['policy_id'], ['policies.id'], ),
+        sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_claims_claim_number'), 'claims', ['claim_number'], unique=True)
+    op.create_index(op.f('ix_claims_id'), 'claims', ['id'], unique=False)
+
+
+def downgrade() -> None:
+    # Drop tables in reverse order
+    op.drop_index(op.f('ix_claims_id'), table_name='claims')
+    op.drop_index(op.f('ix_claims_claim_number'), table_name='claims')
+    op.drop_table('claims')
+    
+    op.drop_index(op.f('ix_policies_policy_number'), table_name='policies')
+    op.drop_index(op.f('ix_policies_id'), table_name='policies')
+    op.drop_table('policies')
+    
+    op.drop_index(op.f('ix_customers_id'), table_name='customers')
+    op.drop_index(op.f('ix_customers_email'), table_name='customers')
+    op.drop_table('customers')
+    
+    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')

migrations/versions/__init__.py

@@ -0,0 +1 @@
+# Migration versions package

requirements.txt

@@ -0,0 +1,11 @@
+fastapi>=0.100.0
+uvicorn>=0.22.0
+sqlalchemy>=2.0.0
+alembic>=1.11.0
+pydantic>=2.0.0
+pydantic-settings>=2.0.0
+passlib[bcrypt]>=1.7.4
+python-jose[cryptography]>=3.3.0
+python-multipart>=0.0.6
+email-validator>=2.0.0
+ruff>=0.0.275