import uuid

from datetime import date, datetime, time, timedelta
from decimal import Decimal

from fastapi import APIRouter, Cookie, Depends, Security
from sqlalchemy import distinct, select
from sqlalchemy.orm import Session, joinedload

from ...core.config import settings
from ...core.security import get_current_active_user as get_user
from ...db.session import SessionFuture
from ...models.reporting_level import ReportingLevel
from ...models.settlement import Settlement
from ...models.user import User
from ...models.voucher import Voucher
from ...printing.cashier_report import print_cashier_report
from ...schemas.cashier_report import CashierReport, InfoItem, NameAmount
from ...schemas.user import UserLink
from ...schemas.user_token import UserToken
from . import check_audit_permission, report_finish_date, report_start_date


router = APIRouter()


@router.get("/active", response_model=list[UserLink])
def active_cashiers(
    start_date: date = Depends(report_start_date),
    finish_date: date = Depends(report_finish_date),
    user: UserToken = Security(get_user, scopes=["cashier-report"]),
) -> list[UserLink]:
    check_audit_permission(start_date, user.permissions)
    with SessionFuture() as db:
        return get_active_cashiers(start_date, finish_date, db)


def get_active_cashiers(start_date: date, finish_date: date, db: Session) -> list[UserLink]:
    start_datetime = datetime.combine(start_date, time()) + timedelta(
        minutes=settings.TIMEZONE_OFFSET_MINUTES - settings.NEW_DAY_OFFSET_MINUTES
    )
    finish_datetime = datetime.combine(finish_date, time()) + timedelta(
        days=1, minutes=settings.TIMEZONE_OFFSET_MINUTES - settings.NEW_DAY_OFFSET_MINUTES
    )
    users = (
        db.execute(
            select(User)
            .where(
                User.id.in_(
                    select(distinct(Voucher.user_id)).where(
                        Voucher.date >= start_datetime,
                        Voucher.date <= finish_datetime,
                    )
                )
            )
            .order_by(User.name)
        )
        .scalars()
        .all()
    )
    return [UserLink(id=u.id, name=u.name) for u in users]


@router.get("/{id_}", response_model=CashierReport)
def show_id(
    id_: uuid.UUID,
    start_date: date = Depends(report_start_date),
    finish_date: date = Depends(report_finish_date),
    user: UserToken = Security(get_user, scopes=["cashier-report"]),
) -> CashierReport:
    check_audit_permission(start_date, user.permissions)
    user_link = UserLink(id=user.id_, name=user.name)
    with SessionFuture() as db:
        return get_id(id_, start_date, finish_date, user_link, db)


def get_id(id_: uuid.UUID, start_date: date, finish_date: date, user: UserLink, db: Session) -> CashierReport:
    cashier: str = db.execute(select(User.name).where(User.id == id_)).scalar_one()
    start_datetime = datetime.combine(start_date, time()) + timedelta(
        minutes=settings.TIMEZONE_OFFSET_MINUTES - settings.NEW_DAY_OFFSET_MINUTES
    )
    finish_datetime = datetime.combine(finish_date, time()) + timedelta(
        days=1, minutes=settings.TIMEZONE_OFFSET_MINUTES - settings.NEW_DAY_OFFSET_MINUTES
    )
    vouchers = (
        db.execute(
            select(Voucher)
            .options(
                joinedload(Voucher.settlements, innerjoin=True).joinedload(Settlement.settle_option, innerjoin=True)
            )
            .where(
                Voucher.date >= start_datetime,
                Voucher.date <= finish_datetime,
                Voucher.user_id == id_,
            )
            .order_by(Voucher.voucher_type)
        )
        .unique()
        .scalars()
        .all()
    )

    info: dict[str, list[InfoItem]] = {}
    amounts = {}
    for item in vouchers:
        for so in (so for so in item.settlements if so.settle_option.reporting_level >= ReportingLevel.Aggregate):
            if so.settle_option.name not in amounts:
                if so.settle_option.reporting_level == ReportingLevel.Detailed:
                    info[so.settle_option.name] = []
                amounts[so.settle_option.name] = Decimal(0)
            amounts[so.settle_option.name] += so.amount
            if so.settle_option.reporting_level == ReportingLevel.Detailed:
                info[so.settle_option.name].append(
                    InfoItem(
                        date=item.date,
                        billId=", ".join(f"{x.regime.prefix}-{x.bill_number}" for x in item.bills),
                        customer=item.customer.name if item.customer is not None else "",
                        amount=so.amount,
                    )
                )
    return CashierReport(
        startDate=start_date,
        finishDate=finish_date,
        cashier=UserLink(id=id_, name=cashier),
        cashiers=", ".join(x.name or "" for x in get_active_cashiers(start_date, finish_date, db)),
        amounts=[NameAmount(name=key, amount=value) for key, value in amounts.items()],
        info=info,
        user=user,
    )


@router.get("/print/{id_}", response_model=bool)
def print_report(
    id_: uuid.UUID,
    start_date: date = Depends(report_start_date),
    finish_date: date = Depends(report_finish_date),
    device_id: uuid.UUID = Cookie(None),
    user: UserToken = Security(get_user, scopes=["cashier-report"]),
) -> bool:
    check_audit_permission(start_date, user.permissions)
    with SessionFuture() as db:
        report = get_id(id_, start_date, finish_date, UserLink(id=user.id_, name=user.name), db)
        print_cashier_report(report, device_id, db)
        return True


@router.get("", response_model=CashierReport)
def show_blank(
    start_date: date = Depends(report_start_date),
    finish_date: date = Depends(report_finish_date),
    user: UserToken = Security(get_user, scopes=["cashier-report"]),
) -> CashierReport:
    check_audit_permission(start_date, user.permissions)
    return CashierReport(
        startDate=start_date,
        finishDate=finish_date,
        cashier=UserLink(id=None),
        cashiers="",
        amounts=[],
        info=[],
        user=UserLink(id=user.id_),
    )