from datetime import datetime, timedelta, date

from fastapi import APIRouter, Depends, Security
from sqlalchemy.orm import Session

from barker.core.config import settings
from ...models import Voucher, VoucherType, Settlement, Reprint, SettleOption
from ...schemas.auth import UserToken
from ...core.security import get_current_active_user as get_user
from ...db.session import SessionLocal

router = APIRouter()


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


@router.get("")
def bill_details(
    s: str = None,
    f: str = None,
    db: Session = Depends(get_db),
    user: UserToken = Security(get_user, scopes=["bill-settlement-report"]),
):
    start_date = date.today() if s is None else datetime.strptime(s, "%d-%b-%Y").date()
    finish_date = date.today() if f is None else datetime.strptime(f, "%d-%b-%Y").date()
    if (date.today() - start_date).days > 5 and "accounts-audit" not in user.permissions:
        raise ValueError("Accounts Audit")

    return {
        "startDate": start_date.strftime("%d-%b-%Y"),
        "finishDate": finish_date.strftime("%d-%b-%Y"),
        "amounts": settlements(start_date, finish_date, db)
        + reprints(start_date, finish_date, db),
    }


def settlements(s: date, f: date, db: Session):
    start_date = s + timedelta(minutes=settings.NEW_DAY_OFFSET_MINUTES)
    finish_date = f + timedelta(days=1, minutes=settings.NEW_DAY_OFFSET_MINUTES)
    vouchers = (
        db.query(Voucher)
        .join(Voucher.settlements)
        .join(Settlement.settle_option)
        .filter(Voucher.date >= start_date, Voucher.date <= finish_date)
        .order_by(Voucher.voucher_type)
        .order_by(Voucher.bill_id)
        .all()
    )

    report = []
    for item in vouchers:
        for so in (so for so in item.settlements if so.settle_option.show_in_choices):
            if item.voucher_type == VoucherType.VOID:
                details = f"Void: {item.reason}"
            elif item.voucher_type == VoucherType.STAFF:
                details = f"Staff: {item.reason}"
            elif item.voucher_type == VoucherType.NO_CHARGE:
                details = f"NC: {item.reason}"
            else:
                details = so.settle_option.name
            report.append(
                {
                    "date": item.date.strftime("%d-%b-%Y %H:%M:%S"),
                    "billId": item.full_bill_id,
                    "settlement": details,
                    "amount": round(so.amount, 2),
                }
            )
    return report


def reprints(s: date, f: date, db: Session):
    start_date = s + timedelta(minutes=settings.NEW_DAY_OFFSET_MINUTES)
    finish_date = f + timedelta(days=1, minutes=settings.NEW_DAY_OFFSET_MINUTES)
    return [
        {
            "date": item.date.strftime("%d-%b-%Y %H:%M:%S"),
            "billId": item.voucher.full_bill_id,
            "settlement": f"Reprinted by {item.user.name}",
            "Amount": round(
                next(s.amount for s in item.voucher.settlements if s.settled == SettleOption.AMOUNT()) * -1, 2,
            ),
        }
        for item in db.query(Reprint).filter(Reprint.date >= start_date, Reprint.date <= finish_date).all()
    ]