from fastapi import FastAPI, HTTPException, Depends, Request
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from pydantic import BaseModel, validator
import ipfshttpclient
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy import Column, Integer, String
from sqlalchemy.exc import IntegrityError
from bcrypt import hashpw, gensalt, checkpw
from fastapi.responses import JSONResponse
from fastapi import status
from datetime import datetime, timedelta
import jwt
from typing import Optional
import os
import logging
from logging.handlers import RotatingFileHandler
from fastapi.middleware.cors import CORSMiddleware
from fastapi_csrf_protect import CsrfProtect
from slowapi import Limiter, _rate_limit_exceeded_handler
from slowapi.util import get_remote_address
from slowapi.errors import RateLimitExceeded

Set up logging

logger = logging.getLogger(name)
logger.setLevel(logging.INFO)
handler = RotatingFileHandler('app.log', maxBytes=1000000, backupCount=1)
logger.addHandler(handler)

Set up IPFS client connection

client = ipfshttpclient.connect()

Set up database connection

engine = create_engine('sqlite:///healthcare.db')
Base = declarative_base()
Session = sessionmaker(bind=engine)

Define the User model

class User(Base):
tablename = 'users'
id = Column(Integer, primary_key=True)
username = Column(String, unique=True)
password = Column(String)
role = Column(String)

Define the Facility model

class Facility(Base):
tablename = 'facilities'
id = Column(Integer, primary_key=True)
npi = Column(String)
name = Column(String)

Create the database tables

Base.metadata.create_all(engine)

Define the authentication scheme

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

Define the FastAPI application

app = FastAPI()

Set up CSRF protection

csrf = CsrfProtect(app)

Set up rate limiting

limiter = Limiter(key_func=get_remote_address)
app.add_exception_handler(RateLimitExceeded, _rate_limit_exceeded_handler)
app.state.limiter = limiter

Add CORS middleware to the FastAPI application

app.add_middleware(
CORSMiddleware,
allow_origins=["http://localhost:7860"],
allow_credentials=True,
allow_methods=[""],
allow_headers=[""],
)

Define the User request model

class UserRequest(BaseModel):
username: str
password: str

@validator('username')
def username_must_be_valid(cls, v):
    if len(v) < 3:
        raise ValueError('Username must be at least 3 characters long')
    return v

@validator('password')
def password_must_be_valid(cls, v):
    if len(v) < 8:
        raise ValueError('Password must be at least 8 characters long')
    return v

Define the LegalSummaryRequest model

class LegalSummaryRequest(BaseModel):
section_id: str
language: str

@validator('section_id')
def section_id_must_be_valid(cls, v):
    if not v.startswith('ACA-'):
        raise ValueError('Section ID must start with "ACA-"')
    return v

@validator('language')
def language_must_be_valid(cls, v):
    if v not in ['English', 'Spanish']:
        raise ValueError('Language must be either "English" or "Spanish"')
    return v

Define the FacilityFormRequest model

class FacilityFormRequest(BaseModel):
facility_npi: str
content: str

@validator('facility_npi')
def facility_npi_must_be_valid(cls, v):
    if len(v)!= 10:
        raise ValueError('Facility NPI must be 10 digits long')
    return v

@validator('content')
def content_must_be_valid(cls, v):
    if len(v) < 10:
        raise ValueError('Content must be at least 10 characters long')
    return v

Function to hash a password

def hash_password(password):
return hashpw(password.encode('utf-8'), gensalt())

Function to verify a password

def verify_password(plain_password, hashed_password):
return checkpw(plain_password.encode('utf-8'), hashed_password)

Function to generate a summary

def generate_summary(section_id, language):
# Replace with your actual logic
return "States establish health exchanges by 2014..."

Add security headers to FastAPI responses

@app .middleware("http")
async def add_security_headers(request, call_next):
response = await call_next(request)
response