import uuid
from typing import Optional, List

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

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

router = APIRouter()


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


@router.post("/list", response_model=List[schemas.Product])
def sort_order(
        data: List[schemas.Product], db: Session = Depends(get_db),
        user: UserToken = Security(get_user, scopes=["products"]),
):
    try:
        indexes = {}
        for item in data:
            if item.menu_category.id_ in indexes:
                indexes[item.menu_category.id_] += 1
            else:
                indexes[item.menu_category.id_] = 0
            db.query(Product).filter(Product.id == item.id_).update(
                {Product.sort_order: indexes[item.menu_category.id_]}
            )
        db.commit()
        return [
            product_info(item)
            for item in db.query(Product)
                .order_by(Product.menu_category_id)
                .order_by(Product.sort_order)
                .order_by(Product.name)
                .options(joinedload(Product.menu_category), joinedload(Product.sale_category))
                .all()
        ]
    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.post("", response_model=schemas.Product)
def save(
    data: schemas.ProductIn, db: Session = Depends(get_db), user: UserToken = Security(get_user, scopes=["products"]),
):
    try:
        item = Product(
            name=data.name,
            units=data.units,
            menu_category_id=data.menu_category.id_,
            sale_category_id=data.sale_category.id_,
            price=data.price,
            has_happy_hour=data.has_happy_hour,
            is_not_available=data.is_not_available,
            quantity=data.quantity,
            is_active=data.is_active,
        )
        db.add(item)
        db.commit()
        return product_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.Product)
def update(
    id_: uuid.UUID,
    data: schemas.ProductIn,
    db: Session = Depends(get_db),
    user: UserToken = Security(get_user, scopes=["products"]),
):
    try:
        item: Product = db.query(Product).filter(Product.id == id_).first()
        item.name = data.name
        item.units = data.units
        item.menu_category_id = data.menu_category.id_
        item.sale_category_id = data.sale_category.id_
        item.price = data.price
        item.has_happy_hour = data.has_happy_hour
        item.is_not_available = data.is_not_available
        item.quantity = data.quantity
        item.is_active = data.is_active
        db.commit()
        return product_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: Product = db.query(Product).filter(Product.id == id_).first()
        if item is None:
            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND, detail="Product not found",
            )
        else:
            raise HTTPException(
                status_code=status.HTTP_501_NOT_IMPLEMENTED, detail="Product 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 product_info(None)


@router.get("/list")
def show_list(db: Session = Depends(get_db), user: UserToken = Depends(get_user)):
    return [
        product_info(item)
        for item in db.query(Product)
        .order_by(Product.menu_category_id)
        .order_by(Product.sort_order)
        .order_by(Product.name)
        .options(joinedload(Product.menu_category), joinedload(Product.sale_category))
        .all()
    ]


@router.get("/query")
async def show_term(
    mc: uuid.UUID = None,
    a: bool = None,
    db: Session = Depends(get_db),
    current_user: UserToken = Depends(get_user),
):
    list_ = []
    for item in db.query(Product).filter(Product.is_active == a, Product.menu_category_id == mc).order_by(Product.sort_order, Product.name).all():
        list_.append(
            {
                "id": item.id,
                "name": item.full_name,
                "saleCategory": {"id": item.sale_category_id, "name": item.sale_category.name, },
                "tax": {
                    "id": item.sale_category.tax_id,
                    "name": item.sale_category.tax.name,
                    "rate": item.sale_category.tax.rate,
                },
                "price": item.price,
                "hasHappyHour": False,
                "isNotAvailable": item.is_not_available,
                "isActive": item.is_active,
                "sortOrder": item.sort_order,
            }
        )
        if item.has_happy_hour:
            list_.append(
                {
                    "id": item.id,
                    "name": "H H " + item.full_name,
                    "saleCategory": {"id": item.sale_category_id, "name": item.sale_category.name, },
                    "tax": {
                        "id": item.sale_category.tax_id,
                        "name": item.sale_category.tax.name,
                        "rate": item.sale_category.tax.rate,
                    },
                    "price": item.price,
                    "hasHappyHour": True,
                    "isNotAvailable": item.is_not_available,
                    "isActive": item.is_active,
                    "sortOrder": item.sort_order,
                }
            )
    return list_


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


def product_info(item: Optional[Product]):
    if item is None:
        return {
            "name": "",
            "units": "",
            "menuCategory": {},
            "saleCategory": {},
            "price": 0,
            "hasHappyHour": False,
            "isNotAvailable": False,
            "isActive": True,
            "sortOrder": 0,
        }
    return {
        "id": item.id,
        "name": item.name,
        "units": item.units,
        "menuCategory": {"id": item.menu_category_id, "name": item.menu_category.name},
        "saleCategory": {
            "id": item.sale_category_id,
            "name": item.sale_category.name,
        },
        "price": item.price,
        "hasHappyHour": item.has_happy_hour,
        "isNotAvailable": item.is_not_available,
        "isActive": item.is_active,
        "sortOrder": item.sort_order,
    }