import uuid
from typing import Optional, List

from fastapi import APIRouter, HTTPException, status, Depends, Security
from sqlalchemy import and_
from sqlalchemy.exc import SQLAlchemyError
from sqlalchemy.orm import Session
from sqlalchemy.dialects.postgresql import insert as pg_insert

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 SectionPrinter, MenuCategory

router = APIRouter()


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


@router.post("/{id_}", response_model=List[schemas.SectionPrinter])
def save(
    id_: uuid.UUID,
    data: List[schemas.SectionPrinter],
    db: Session = Depends(get_db),
    user: UserToken = Security(get_user, scopes=["section-printers"]),
):
    try:
        current = []
        for mcs in data:
            if mcs.menu_category.id_ is None and mcs.printer.id_ is None:
                raise ValueError("Please choose a default printer")
            if mcs.printer.id_ is None:
                continue
            stmt = (
                pg_insert(SectionPrinter.__table__)
                .values(
                    id=uuid.uuid4(),
                    menu_category_id=mcs.menu_category.id_ if mcs.menu_category is not None else None,
                    section_id=id_,
                    printer_id=mcs.printer.id_,
                    copies=mcs.copies,
                )
                .on_conflict_do_update(
                    index_elements=["menu_category_id", "section_id"],
                    set_=dict(printer_id=mcs.printer.id_, copies=mcs.copies),
                )
            )
            db.execute(stmt)
            current.append(mcs.menu_category.id_)
        db.execute(
            SectionPrinter.__table__.delete(
                and_(
                    SectionPrinter.section_id == id_,
                    SectionPrinter.menu_category_id != None,
                    ~SectionPrinter.menu_category_id.in_([x for x in current if x is not None]),
                )
            )
        )
        db.commit()

        return report(id_, 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.delete("/{id_}")
def delete(
    id_: uuid.UUID, db: Session = Depends(get_db), user: UserToken = Security(get_user, scopes=["section-printers"]),
):
    try:
        SectionPrinter.__table__.delete(SectionPrinter.section_id == id_)
        db.commit()
        return report(id_, 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.get("")
def show_blank(
    db: Session = Depends(get_db), user: UserToken = Security(get_user, scopes=["section-printers"]),
):
    return report(None, db)


@router.get("/{id_}")
def show_id(
    id_: uuid.UUID, db: Session = Depends(get_db), user: UserToken = Security(get_user, scopes=["section-printers"]),
):
    return report(id_, db)


# @view_config(
#     request_method="GET",
#     route_name="v1_section_printers_id",
#     renderer="json",
#     request_param="m",
#     permission="Authenticated",
# )
# def show_details(request):
#     section_id = uuid.UUID(request.matchdict["section_id"])
#     menu_category_id = request.GET.get("m", None)
#     if menu_category_id is not None:
#         menu_category_id = uuid.UUID(menu_category_id)
#     item = (
#         request.dbsession.query(SectionPrinter)
#         .filter(SectionPrinter.section_id == section_id, SectionPrinter.menu_category_id == menu_category_id,)
#         .first()
#     )
#     return section_printer_info(item, request.dbsession)


def report(section_id: uuid.UUID, db: Session):
    menu_categories = db.query(MenuCategory.id, MenuCategory.name).filter(MenuCategory.is_active == True).order_by(MenuCategory.sort_order).all()
    list_ = []
    for item in [(None,)] + menu_categories:
        mc = (
            db.query(SectionPrinter)
            .filter(SectionPrinter.section_id == section_id, SectionPrinter.menu_category_id == item[0])
            .first()
        )
        list_.append(
            {
                "menuCategory": {} if item[0] is None else {"id": item[0], "name": item[1]},
                "printer": {} if mc is None else {"id": mc.printer_id},
                "copies": 0 if mc is None else mc.copies,
            }
        )
    return list_


def section_printer_info(item: Optional[SectionPrinter]):
    if item is None:
        return {"menuCategory": {}, "section": {}, "printer": {}, "copies": 0}
    # if type(item) is uuid.UUID:
    #     item = db.query(SectionPrinter).filter(SectionPrinter.id == item).first()
    return {
        "id": item.id,
        "menuCategory": None
        if item.menu_category is None
        else {"id": item.menu_category.id, "name": item.menu_category.name},
        "section": {"id": item.section.id, "name": item.section.name},
        "printer": {"id": item.printer.id, "name": item.printer.name},
        "copies": item.copies,
    }