from decimal import Decimal
from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.orm import Session

from app.api import deps
from app.models.order import Order, OrderItem
from app.schemas.order import OrderCreate, OrderOut

router = APIRouter()


@router.post("/", response_model=OrderOut, status_code=status.HTTP_202_ACCEPTED)
def create_order(order_in: OrderCreate, db: Session = Depends(deps.get_db)):
    """
    Submit a new customer order.
    Returns status code 202 (Accepted) as the order is pending verification.
    """
    try:
        total = Decimal("0.00")
        for item in order_in.items:
            total += item.price * item.quantity

        db_order = Order(
            customer_id=order_in.customer_id, status="PENDING", total_price=total
        )
        db.add(db_order)
        db.flush()

        for item in order_in.items:
            db_item = OrderItem(
                order_id=db_order.id,
                product_id=item.product_id,
                quantity=item.quantity,
                price=item.price,
            )
            db.add(db_item)

        db.commit()
        db.refresh(db_order)

        return db_order

    except Exception:
        db.rollback()
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Could not initialize checkout process.",
        )