barker/barker/barker/routers/customer.py

import uuid

from typing import List

import barker.schemas.customer as schemas

from fastapi import APIRouter, Depends, HTTPException, Security, status
from sqlalchemy import or_
from sqlalchemy.exc import SQLAlchemyError
from sqlalchemy.orm import Session

from ..core.security import get_current_active_user as get_user
from ..db.session import SessionLocal
from ..models.customer import Customer
from ..models.customer_discount import CustomerDiscount
from ..models.sale_category import SaleCategory
from ..schemas.user_token import UserToken


router = APIRouter()


# Dependency
def get_db():
    try:
        db = SessionLocal()
        yield db
    finally:
        db.close()


@router.post("", response_model=schemas.Customer)
def save(
    data: schemas.CustomerIn,
    db: Session = Depends(get_db),
    user: UserToken = Security(get_user, scopes=["customers"]),
) -> schemas.Customer:
    try:
        item = Customer(name=data.name, phone=data.phone, address=data.address)
        db.add(item)
        add_discounts(item, data.discounts, db)
        db.commit()
        return customer_info(item, db)
    except SQLAlchemyError as e:
        db.rollback()
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=str(e),
        )
    except Exception:
        db.rollback()
        raise


@router.put("/{id_}", response_model=schemas.Customer)
def update(
    id_: uuid.UUID,
    data: schemas.CustomerIn,
    db: Session = Depends(get_db),
    user: UserToken = Security(get_user, scopes=["customers"]),
) -> schemas.Customer:
    try:
        item: Customer = db.query(Customer).filter(Customer.id == id_).first()
        item.name = data.name
        item.phone = data.phone
        item.address = data.address
        add_discounts(item, data.discounts, db)
        db.commit()
        return customer_info(item, db)
    except SQLAlchemyError as e:
        db.rollback()
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail=str(e),
        )
    except Exception:
        db.rollback()
        raise


def add_discounts(customer: Customer, discounts: List[schemas.DiscountItem], db: Session):
    for discount in discounts:
        cd = next((d for d in customer.discounts if d.sale_category_id == discount.id_), None)
        if cd is None:
            cd = CustomerDiscount(discount.id_, round(discount.discount, 5), customer=customer)
            customer.discounts.append(cd)
            db.add(cd)
        else:
            cd.discount = round(discount.discount, 5)


@router.delete("/{id_}")
def delete(
    id_: uuid.UUID,
    db: Session = Depends(get_db),
    user: UserToken = Security(get_user, scopes=["customers"]),
):
    try:
        item: Customer = db.query(Customer).filter(Customer.id == id_).first()
        if item is None:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail="Customer not found",
            )
        db.delete(item)
        db.commit()
    except Exception:
        db.rollback()
        raise


@router.get("", response_model=schemas.CustomerBlank)
def show_blank(
    db: Session = Depends(get_db),
    user: UserToken = Security(get_user, scopes=["customers"]),
) -> schemas.CustomerBlank:
    return blank_customer_info()


@router.get("/list", response_model=List[schemas.Customer])
def show_list(db: Session = Depends(get_db), user: UserToken = Depends(get_user)) -> List[schemas.Customer]:
    return [customer_info_for_list(item) for item in db.query(Customer).order_by(Customer.name).all()]


@router.get("/query", response_model=List[schemas.Customer])
async def show_term(
    q: str,
    db: Session = Depends(get_db),
    current_user: UserToken = Depends(get_user),
) -> List[schemas.Customer]:
    query = db.query(Customer)
    if q is not None:
        for item in q.split():
            query = query.filter(or_(Customer.name.ilike(f"%{item}%"), Customer.phone.ilike(f"%{item}%")))

    query = query.order_by(Customer.name).all()
    return [customer_info_for_list(item) for item in query]


@router.get("/{id_}", response_model=schemas.Customer)
def show_id(
    id_: uuid.UUID,
    db: Session = Depends(get_db),
    user: UserToken = Security(get_user, scopes=["customers"]),
) -> schemas.Customer:
    item: Customer = db.query(Customer).filter(Customer.id == id_).first()
    return customer_info(item, db)


def customer_info(item: Customer, db: Session) -> schemas.Customer:
    return schemas.Customer(
        id=item.id,
        name=item.name,
        address=item.address,
        phone=item.phone,
        discounts=[
            {
                "id": sc.id,
                "name": sc.name,
                "discount": next((d.discount for d in item.discounts if d.sale_category_id == sc.id), 0),
            }
            for sc in db.query(SaleCategory).order_by(SaleCategory.name).all()
        ],
    )


def customer_info_for_list(item: Customer) -> schemas.Customer:
    return schemas.Customer(
        id=item.id,
        name=item.name,
        address=item.address,
        phone=item.phone,
        discounts=[
            {
                "id": d.sale_category_id,
                "name": d.sale_category.name,
                "discount": d.discount,
            }
            for d in item.discounts
            if d.discount != 0
        ],
    )


def blank_customer_info() -> schemas.CustomerBlank:
    return schemas.CustomerBlank(name="", address="", phone="", discounts=[])