import uuid
from typing import Optional

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

from ..schemas.auth import UserToken
import barker.schemas.master as schemas
from ..core.security import get_current_active_user as get_user
from ..db.session import SessionLocal
from ..models.master import Product, MenuCategory

router = APIRouter()


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


@router.post("", response_model=schemas.MenuCategory)
def save(
    data: schemas.MenuCategoryIn, db: Session = Depends(get_db), user: UserToken = Security(get_user, scopes=["products"]),
):
    try:
        item = MenuCategory(name=data.name, discount_limit=data.discount_limit, is_active=data.is_active, sort_order=0)
        db.add(item)
        db.commit()
        return menu_category_info(item)
    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.MenuCategory)
def update(
    id_: uuid.UUID,
    data: schemas.MenuCategoryIn,
    db: Session = Depends(get_db),
    user: UserToken = Security(get_user, scopes=["products"]),
):
    try:
        item: MenuCategory = db.query(MenuCategory).filter(MenuCategory.id == id_).first()
        if item.is_fixture:
            raise HTTPException(
                status_code=status.HTTP_423_LOCKED, detail=f"{item.name} is a fixture and cannot be edited or deleted.",
            )
        item.name = data.name
        item.discount_limit = data.discount_limit
        item.is_active = data.discount_limit
        db.commit()
        return menu_category_info(item)
    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.delete("/{id_}")
def delete(
    id_: uuid.UUID, db: Session = Depends(get_db), user: UserToken = Security(get_user, scopes=["products"]),
):
    try:
        item: MenuCategory = db.query(MenuCategory).filter(MenuCategory.id == id_).first()
        if item is None:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND, detail="Menu Category not found",
            )
        elif item.is_fixture:
            raise HTTPException(
                status_code=status.HTTP_423_LOCKED, detail=f"{item.name} is a fixture and cannot be edited or deleted.",
            )
        else:
            raise HTTPException(
                status_code=status.HTTP_501_NOT_IMPLEMENTED, detail="Menu Category deletion not implemented",
            )
    except Exception:
        db.rollback()
        raise


@router.get("")
def show_blank(
    db: Session = Depends(get_db), user: UserToken = Security(get_user, scopes=["products"]),
):
    return menu_category_info(None)


@router.get("/list")
def show_list(db: Session = Depends(get_db), user: UserToken = Depends(get_user)):
    return [menu_category_info(item) for item in db.query(MenuCategory).order_by(MenuCategory.sort_order).order_by(MenuCategory.name).all()]


@router.get("/sale-list")
async def sale_list(
    db: Session = Depends(get_db),
    current_user: UserToken = Depends(get_user),
):
    list_ = (
        db.query(MenuCategory)
        .filter(MenuCategory.is_active == True)
        .order_by(MenuCategory.sort_order)
        .order_by(MenuCategory.name)
        .all()
    )
    menu_categories = []
    for item in list_:
        products = (
            db.query(Product)
            .filter(Product.menu_category_id == item.id)
            .filter(Product.is_active == True)
            .order_by(Product.sort_order)
            .order_by(Product.name)
            .all()
        )
        if len(products) == 0:
            continue
        pg = menu_category_info(item)
        pg["products"] = [
            {
                "id": p.id,
                "name": p.name,
                "units": p.units,
                "tat": {"id": p.vat.id, "name": p.vat.name, "rate": p.vat.rate},
                "price": p.price,
                "hasHappyHour": p.has_happy_hour,
                "isActive": p.is_active,
                "isNotAvailable": p.is_not_available,
                "sortOrder": p.sort_order,
                "quantity": p.quantity,
            }
            for p in products
        ]
        menu_categories.append(pg)
    return menu_categories


@router.get("/{id_}")
def show_id(
    id_: uuid.UUID, db: Session = Depends(get_db), user: UserToken = Security(get_user, scopes=["products"]),
):
    item: MenuCategory = db.query(MenuCategory).filter(MenuCategory.id == id_).first()
    return menu_category_info(item)


# @view_config(
#     request_method="POST", route_name="v1_menu_categories_list", renderer="json", permission="Products", trans=True,
# )
# def sort_order(request):
#     json = request.json_body
#     for index, item in enumerate(json):
#         request.dbsession.query(MenuCategory).filter(MenuCategory.id == uuid.UUID(item["id"])).update(
#             {MenuCategory.sort_order: index}
#         )
#     return True


def menu_category_info(item: Optional[MenuCategory]):
    if item is None:
        return {
            "name": "",
            "discountLimit": 0,
            "isActive": True,
            "isFixture": False,
            "sortOrder": 0,
        }
    return {
        "id": item.id,
        "name": item.name,
        "discountLimit": item.discount_limit * 100,
        "isActive": item.is_active,
        "isFixture": item.is_fixture,
        "sortOrder": item.sort_order,
    }