from fastapi import APIRouter, HTTPException
from sqlalchemy import create_engine, Column, String, Integer
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
import os

router = APIRouter()

# Database configuration
DATABASE_URL = os.getenv("DATABASE_URL", "postgresql://user:password@localhost:5432/dbname")
engine = create_engine(DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

class Customer(Base):
    __tablename__ = "customers"
    
    id = Column(Integer, primary_key=True, index=True)
    name = Column(String, index=True)
    email = Column(String, unique=True, index=True)
    phone = Column(String)
    address = Column(String)

Base.metadata.create_all(bind=engine)

@router.post("/customer")
async def create_customer(
    name: str,
    email: str,
    phone: str,
    address: str
):
    """Create new customer endpoint"""
    db = SessionLocal()
    
    # Check if email already exists
    if db.query(Customer).filter(Customer.email == email).first():
        raise HTTPException(status_code=400, detail="Email already registered")
        
    # Create new customer
    customer = Customer(
        name=name,
        email=email, 
        phone=phone,
        address=address
    )
    
    try:
        db.add(customer)
        db.commit()
        db.refresh(customer)
    except Exception as e:
        db.rollback()
        raise HTTPException(status_code=400, detail=str(e))
    finally:
        db.close()

    return {
        "message": "Customer created successfully",
        "customer_id": customer.id,
        "name": customer.name,
        "method": "POST",
        "_verb": "post",
        "next_steps": [
            "Customer verification",
            "Complete profile"
        ]
    }