#!/usr/bin/env python3
"""accrual-report - Status reports for accruals

accrual-report checks accruals (postings under Assets:Receivable and
Liabilities:Payable) for errors and metadata consistency, and reports any
problems on stderr. Then it writes a report about the status of those
accruals.

If you run it with no arguments, it will generate an aging report in ODS format.

Otherwise, the typical way to run it is to pass an RT ticket number or
invoice link as an argument, to report about accruals that match those
criteria::

    # Report all accruals associated with RT#1230:
    accrual-report 1230
    # Report all accruals with the invoice link rt:45/670.
    accrual-report 45/670
    # Report all accruals with the invoice link Invoice980.pdf.
    accrual-report Invoice980.pdf

By default, to stay fast, accrual-report only looks at unaudited books. You
can search further back in history by passing the ``--since`` argument. The
argument can be a fiscal year, or a negative number of how many years back
to search::

    # Search for accruals since 2016
    accrual-report --since 2016 [search terms …]
    # Search for accruals from the beginning of three fiscal years ago
    accrual-report --since -3 [search terms …]

If you want to further limit what accruals are reported, you can match on
other metadata by passing additional arguments in ``name=value`` format.
You can pass any number of search terms. For example::

    # Report accruals associated with RT#1230 and Jane Doe
    accrual-report 1230 entity=Doe-Jane

accrual-report will automatically decide what kind of report to generate
from the search terms you provide and the results they return. If you
searched on an RT ticket or invoice that returned a single outstanding
payable, it writes an outgoing approval report. If you searched on RT ticket
or invoice that returned other results, it writes a balance
report. Otherwise, it writes an aging report. You can specify what report
type you want with the ``--report-type`` option::

    # Write an outgoing approval report for all outstanding payables for
    # Jane Doe, even if there's more than one
    accrual-report --report-type outgoing entity=Doe-Jane
    # Write an aging report for a single RT invoice (this can be helpful when
    # one invoice covers multiple parties)
    accrual-report --report-type aging 12/345
"""
# Copyright © 2020  Brett Smith
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

import argparse
import collections
import datetime
import enum
import logging
import re
import sys

from pathlib import Path

from typing import (
    cast,
    Any,
    BinaryIO,
    Callable,
    Deque,
    Dict,
    Hashable,
    Iterable,
    Iterator,
    List,
    Mapping,
    Match,
    NamedTuple,
    Optional,
    Sequence,
    Set,
    TextIO,
    Tuple,
    TypeVar,
    Union,
)
from ..beancount_types import (
    Entries,
    Error,
    Errors,
    MetaKey,
    MetaValue,
    Transaction,
)

import odf.element  # type:ignore[import]
import odf.style  # type:ignore[import]
import odf.table  # type:ignore[import]
import rt

from beancount.parser import printer as bc_printer

from . import core
from .. import books
from .. import cliutil
from .. import config as configmod
from .. import data
from .. import filters
from .. import rtutil

PROGNAME = 'accrual-report'

PostGroups = Mapping[Optional[Hashable], 'AccrualPostings']
T = TypeVar('T')

logger = logging.getLogger('conservancy_beancount.reports.accrual')

class Account(NamedTuple):
    name: str
    aging_thresholds: Sequence[int]


class AccrualAccount(enum.Enum):
    # Note the aging report uses the same order accounts are defined here.
    # See AgingODS.start_spreadsheet().
    RECEIVABLE = Account('Assets:Receivable', [365, 120, 90, 60])
    PAYABLE = Account('Liabilities:Payable', [365, 90, 60, 30])

    @classmethod
    def account_names(cls) -> Iterator[str]:
        return (acct.value.name for acct in cls)

    @classmethod
    def by_account(cls, name: data.Account) -> 'AccrualAccount':
        for account in cls:
            if name.is_under(account.value.name):
                return account
        raise ValueError(f"unrecognized account {name!r}")

    @classmethod
    def classify(cls, related: core.RelatedPostings) -> 'AccrualAccount':
        for account in cls:
            account_name = account.value.name
            if all(post.account.is_under(account_name) for post in related):
                return account
        raise ValueError("unrecognized account set in related postings")

    @property
    def normalize_amount(self) -> Callable[[T], T]:
        return core.normalize_amount_func(self.value.name)


class AccrualPostings(core.RelatedPostings):
    __slots__ = ()

    @classmethod
    def make_consistent(cls,
                        postings: Iterable[data.Posting],
    ) -> Iterator[Tuple[Hashable, 'AccrualPostings']]:
        accruals: Dict[Tuple[str, ...], List[data.Posting]] = collections.defaultdict(list)
        payments: Dict[Tuple[str, ...], Deque[data.Posting]] = collections.defaultdict(Deque)
        key: Tuple[str, ...]
        for post in postings:
            norm_func = core.normalize_amount_func(post.account)
            invoice = str(post.meta.get('invoice', 'BlankInvoice'))
            if norm_func(post.units.number) >= 0:
                entity = str(post.meta.get('entity', 'BlankEntity'))
                key = (post.meta.date.isoformat(), entity, invoice, post.account)
                accruals[key].append(post)
            else:
                key = (invoice, post.account)
                payments[key].append(post)

        for key, acc_posts in accruals.items():
            pay_posts = payments[key[2:]]
            if not pay_posts:
                continue
            norm_func = core.normalize_amount_func(key[-1])
            balance = norm_func(core.MutableBalance(post.at_cost() for post in acc_posts))
            while pay_posts and not balance.le_zero():
                pay_post = pay_posts.popleft()
                acc_posts.append(pay_post)
                balance += norm_func(pay_post.at_cost())
            if balance.le_zero() and not balance.is_zero():
                # pay_post causes the accrual to be overpaid. Split it into two
                # synthesized postings: one that causes the accrual to be
                # exactly zero, and one with the remainder back in payments.
                post_cost = pay_post.at_cost()
                # Calling norm_func() reverses the call in the while loop to add
                # the amount to the balance.
                overpayment = norm_func(balance[post_cost.currency])
                amt_to_zero = post_cost._replace(number=post_cost.number - overpayment.number)
                acc_posts[-1] = pay_post._replace(units=amt_to_zero, cost=None, price=None)
                pay_posts.appendleft(pay_post._replace(units=overpayment, cost=None, price=None))
            acc_posts.sort(key=lambda post: post.meta.date)

        for key, acc_posts in accruals.items():
            yield key, cls(acc_posts, _can_own=True)
        for key, pay_posts in payments.items():
            if pay_posts:
                yield key, cls(pay_posts, _can_own=True)

    def is_paid(self) -> Optional[bool]:
        try:
            accrual_type = AccrualAccount.classify(self)
        except ValueError:
            return None
        else:
            return accrual_type.normalize_amount(self.balance()).le_zero()


class BaseReport:
    def __init__(self, out_file: TextIO) -> None:
        self.out_file = out_file
        self.logger = logger.getChild(type(self).__name__)

    def _report(self, posts: AccrualPostings, index: int) -> Iterable[str]:
        raise NotImplementedError("BaseReport._report")

    def run(self, groups: PostGroups) -> None:
        for index, invoice in enumerate(groups):
            for line in self._report(groups[invoice], index):
                print(line, file=self.out_file)


class AgingODS(core.BaseODS[AccrualPostings, data.Account]):
    AGE_COLORS = [
        '#ff00ff',
        '#ff0000',
        '#ff8800',
        '#ffff00',
        '#00ff00',
    ]
    DOC_COLUMNS = [
        'rt-id',
        'invoice',
        'approval',
        'contract',
        'purchase-order',
    ]
    COLUMNS = [
        'Date',
        data.Metadata.human_name('entity'),
        'Invoice Amount',
        'Booked Amount',
        data.Metadata.human_name('project'),
        *(data.Metadata.human_name(key) for key in DOC_COLUMNS),
    ]
    COL_COUNT = len(COLUMNS)

    def __init__(self,
                 rt_wrapper: rtutil.RT,
                 date: datetime.date,
                 logger: logging.Logger,
    ) -> None:
        super().__init__(rt_wrapper)
        self.date = date
        self.logger = logger

    def section_key(self, row: AccrualPostings) -> data.Account:
        return row[0].account

    def start_spreadsheet(self) -> None:
        for accrual_type in AccrualAccount:
            self.use_sheet(accrual_type.name.title())
            for index in range(self.COL_COUNT):
                if index == 0:
                    style: Union[str, odf.style.Style] = ''
                elif index < 6:
                    style = self.column_style(1.2)
                else:
                    style = self.column_style(1.5)
                self.sheet.addElement(odf.table.TableColumn(stylename=style))
            self.add_row(*(
                self.string_cell(name, stylename=self.style_bold)
                for name in self.COLUMNS
            ))
            self.lock_first_row()

    def start_section(self, key: data.Account) -> None:
        accrual_type = AccrualAccount.by_account(key)
        self.norm_func = accrual_type.normalize_amount
        self.age_thresholds = list(accrual_type.value.aging_thresholds)
        self.age_thresholds.append(-sys.maxsize)
        self.age_balances = [core.MutableBalance() for _ in self.age_thresholds]
        self.age_styles = [
            self.merge_styles(self.style_date, self.border_style(
                core.Border.LEFT, '10pt', 'solid', color,
            )) for color in self.AGE_COLORS
        ]
        acct_parts = key.slice_parts()
        self.use_sheet(acct_parts[1])
        self.add_row()
        self.add_row(self.string_cell(
            f"{' '.join(acct_parts[2:])} {acct_parts[1]} Aging Report"
            f" for {self.date.isoformat()}",
            stylename=self.merge_styles(self.style_bold, self.style_centertext),
            numbercolumnsspanned=self.COL_COUNT,
        ))
        self.add_row()

    def end_section(self, key: data.Account) -> None:
        total_balance = core.MutableBalance()
        text_span = 4
        last_age_text: Optional[str] = None
        self.add_row()
        for threshold, balance, style in zip(
                self.age_thresholds, self.age_balances, self.age_styles,
        ):
            years, days = divmod(threshold, 365)
            years_text = f"{years} {'Year' if years == 1 else 'Years'}"
            days_text = f"{days} Days"
            if years and days:
                age_text = f"{years_text} {days_text}"
            elif years:
                age_text = years_text
            else:
                age_text = days_text
            if last_age_text is None:
                age_range = f"Over {age_text}"
            elif threshold < 0:
                self.add_row(
                    self.string_cell(
                        f"Total Unpaid Over {last_age_text}: ",
                        stylename=self.merge_styles(self.style_bold, self.style_endtext),
                        numbercolumnsspanned=text_span,
                    ),
                    *(odf.table.TableCell() for _ in range(1, text_span)),
                    self.balance_cell(total_balance),
                )
                age_range = f"Under {last_age_text}"
            else:
                age_range = f"{age_text}–{last_age_text}"
            self.add_row(
                self.string_cell(
                    f"Total Aged {age_range}: ",
                    stylename=self.merge_styles(self.style_bold, self.style_endtext, style),
                    numbercolumnsspanned=text_span,
                ),
                *(odf.table.TableCell() for _ in range(1, text_span)),
                self.balance_cell(balance),
            )
            last_age_text = age_text
            total_balance += balance
        self.add_row(
            self.string_cell(
                "Total Unpaid: ",
                stylename=self.merge_styles(self.style_bold, self.style_endtext),
                numbercolumnsspanned=text_span,
            ),
            *(odf.table.TableCell() for _ in range(1, text_span)),
            self.balance_cell(total_balance),
        )

    def write_row(self, row: AccrualPostings) -> None:
        row_date = row[0].meta.date
        row_balance = self.norm_func(row.balance_at_cost())
        age = (self.date - row_date).days
        for index, threshold in enumerate(self.age_thresholds):
            if age >= threshold:
                if row_balance.ge_zero():
                    self.age_balances[index] += row_balance
                break
        else:
            return
        raw_balance = self.norm_func(row.balance())
        if raw_balance == row_balance:
            amount_cell = odf.table.TableCell()
        else:
            amount_cell = self.balance_cell(raw_balance)
        entities = row.meta_values('entity')
        entities.discard(None)
        projects = row.meta_values('project')
        projects.discard(None)
        self.add_row(
            self.date_cell(row_date, stylename=self.age_styles[index]),
            self.multiline_cell(sorted(entities)),
            amount_cell,
            self.balance_cell(row_balance),
            self.multiline_cell(sorted(projects)),
            *(self.meta_links_cell(row.all_meta_links(key))
              for key in self.DOC_COLUMNS),
        )


class AgingReport(BaseReport):
    def __init__(self,
                 rt_wrapper: rtutil.RT,
                 out_file: BinaryIO,
                 date: Optional[datetime.date]=None,
    ) -> None:
        if date is None:
            date = datetime.date.today()
        self.out_bin = out_file
        self.logger = logger.getChild(type(self).__name__)
        self.ods = AgingODS(rt_wrapper, date, self.logger)

    def run(self, groups: PostGroups) -> None:
        rows = [group for group in groups.values()
                if not group.balance_at_cost().is_zero()]
        rows.sort(key=lambda group: (
            group[0].account,
            group[0].meta.date,
            abs(sum(amt.number for amt in group.balance_at_cost().values())),
        ))
        self.ods.write(rows)
        self.ods.save_file(self.out_bin)


class BalanceReport(BaseReport):
    def _report(self, posts: AccrualPostings, index: int) -> Iterable[str]:
        meta = posts[0].meta
        date_s = meta.date.strftime('%Y-%m-%d')
        entity_s = meta.get('entity', '<no entity>')
        invoice_s = meta.get('invoice', '<no invoice>')
        balance_s = posts.balance_at_cost().format(zero="Zero balance")
        if index:
            yield ""
        yield f"{entity_s} {invoice_s}:"
        yield f"  {balance_s} outstanding since {date_s}"


class OutgoingReport(BaseReport):
    class PaymentMethods(enum.Enum):
        ach = 'ACH'
        check = 'Check'
        creditcard = 'Credit Card'
        debitcard = 'Debit Card'
        paypal = 'PayPal'
        vendorportal = 'Vendor Portal'
        wire = 'Wire'
        fxwire = wire
        uswire = wire


    def __init__(self, rt_wrapper: rtutil.RT, out_file: TextIO) -> None:
        super().__init__(out_file)
        self.rt_wrapper = rt_wrapper
        self.rt_client = rt_wrapper.rt

    def _primary_rt_id(self, posts: AccrualPostings) -> rtutil.TicketAttachmentIds:
        rt_ids = posts.first_meta_links('rt-id')
        rt_id = next(rt_ids, None)
        rt_id2 = next(rt_ids, None)
        if rt_id is None:
            raise ValueError("no rt-id links found")
        elif rt_id2 is not None:
            raise ValueError("multiple rt-id links found")
        parsed = rtutil.RT.parse(rt_id)
        if parsed is None:
            raise ValueError("rt-id is not a valid RT reference")
        else:
            return parsed

    def _get_payment_method(self, posts: AccrualPostings, ticket_id: str) -> Optional[str]:
        payment_methods = posts.meta_values('payment-method')
        payment_methods.discard(None)
        if all(isinstance(s, str) for s in payment_methods):
            # type ignore for <https://github.com/python/mypy/issues/7853>
            payment_methods = {s.strip().lower() for s in payment_methods}  # type:ignore[union-attr]
        log_prefix = f"cannot set payment-method for rt:{ticket_id}:"
        payment_method_count = len(payment_methods)
        if payment_method_count != 1:
            self.logger.warning("%s %s metadata values found",
                                log_prefix, payment_method_count)
            return None
        payment_method = payment_methods.pop()
        if not isinstance(payment_method, str):
            self.logger.warning("%s %r is not a string value",
                                log_prefix, payment_method)
            return None
        try:
            currency, method_key = payment_method.split(None, 1)
        except ValueError:
            self.logger.warning("%s no method specified in %r",
                                log_prefix, payment_method)
            return None
        curr_match = re.fullmatch(r'[a-z]{3}', currency)
        if curr_match is None:
            self.logger.warning("%s invalid currency %r",
                                log_prefix, currency)
        try:
            method_enum = self.PaymentMethods[method_key]
        except KeyError:
            self.logger.warning("%s invalid method %r",
                                log_prefix, method_key)
            curr_match = None
        if curr_match is None:
            return None
        else:
            return f'{currency.upper()} {method_enum.value}'

    def _report(self, posts: AccrualPostings, index: int) -> Iterable[str]:
        try:
            ticket_id, _ = self._primary_rt_id(posts)
            ticket = self.rt_client.get_ticket(ticket_id)
            # Note we only use this when ticket is None.
            errmsg = f"ticket {ticket_id} not found"
        except (ValueError, rt.RtError) as error:
            ticket = None
            errmsg = error.args[0]
        if ticket is None:
            meta = posts[0].meta
            self.logger.error(
                "can't generate outgoings report for %s %s %s because no RT ticket available: %s",
                meta.date.isoformat(),
                meta.get('entity', '<no entity>'),
                meta.get('invoice', '<no invoice>'),
                errmsg,
            )
            return

        try:
            rt_requestor = self.rt_client.get_user(ticket['Requestors'][0])
        except (IndexError, rt.RtError):
            rt_requestor = None
        if rt_requestor is None:
            requestor = ''
            requestor_name = ''
        else:
            requestor_name = (
                rt_requestor.get('RealName')
                or ticket.get('CF.{payment-to}')
                or ''
            )
            requestor = f'{requestor_name} <{rt_requestor["EmailAddress"]}>'.strip()

        balance = -posts.balance_at_cost()
        balance_s = balance.format(None)
        raw_balance = -posts.balance()
        payment_amount = raw_balance.format('¤¤ #,##0.00')
        if raw_balance != balance:
            payment_amount += f' ({balance_s})'
            balance_s = f'{raw_balance} ({balance_s})'

        payment_to = ticket.get('CF.{payment-to}') or requestor_name
        contract_links = list(posts.all_meta_links('contract'))
        if contract_links:
            contract_s = ' , '.join(self.rt_wrapper.iter_urls(
                contract_links, missing_fmt='<BROKEN RT LINK: {}>',
            ))
        else:
            contract_s = "NO CONTRACT GOVERNS THIS TRANSACTION"
        projects = [v for v in posts.meta_values('project')
                    if isinstance(v, str)]

        yield "PAYMENT FOR APPROVAL:"
        yield f"REQUESTOR: {requestor}"
        yield f"PAYMENT TO: {payment_to}"
        yield f"TOTAL TO PAY: {balance_s}"
        yield f"AGREEMENT: {contract_s}"
        yield f"PROJECT: {', '.join(projects)}"
        yield "\nBEANCOUNT ENTRIES:\n"

        last_txn: Optional[Transaction] = None
        for post in posts:
            txn = post.meta.txn
            if txn is not last_txn:
                last_txn = txn
                txn = self.rt_wrapper.txn_with_urls(txn, '{}')
                # Suppress payment-method metadata from the report.
                txn.meta.pop('payment-method', None)
                for txn_post in txn.postings:
                    if txn_post.meta:
                        txn_post.meta.pop('payment-method', None)
                yield bc_printer.format_entry(txn)

        cf_targets = {
            'payment-amount': payment_amount,
            'payment-method': (self._get_payment_method(posts, ticket_id)
                               or ticket.get('CF.{payment-method}')),
            'payment-to': payment_to,
        }

        cf_updates = {
            f'CF_{key}': value
            for key, value in cf_targets.items()
            if ticket.get(f'CF.{{{key}}}') != value
        }
        if cf_updates:
            try:
                ok = self.rt_client.edit_ticket(ticket_id, **cf_updates)
            except rt.RtError:
                self.logger.debug("RT exception on edit_ticket", exc_info=True)
                ok = False
            if not ok:
                self.logger.warning("failed to set custom fields for rt:%s", ticket_id)


class ReportType(enum.Enum):
    AGING = AgingReport
    BALANCE = BalanceReport
    OUTGOING = OutgoingReport
    AGE = AGING
    BAL = BALANCE
    OUT = OUTGOING
    OUTGOINGS = OUTGOING

    @classmethod
    def by_name(cls, name: str) -> 'ReportType':
        try:
            return cls[name.upper()]
        except KeyError:
            raise ValueError(f"unknown report type {name!r}") from None


class ReturnFlag(enum.IntFlag):
    LOAD_ERRORS = 1
    # 2 was used in the past, it can probably be reclaimed.
    REPORT_ERRORS = 4
    NOTHING_TO_REPORT = 8


def filter_search(postings: Iterable[data.Posting],
                  search_terms: Iterable[cliutil.SearchTerm],
) -> Iterable[data.Posting]:
    accounts = tuple(AccrualAccount.account_names())
    postings = (post for post in postings if post.account.is_under(*accounts))
    for query in search_terms:
        postings = query.filter_postings(postings)
    return postings

def parse_arguments(arglist: Optional[Sequence[str]]=None) -> argparse.Namespace:
    parser = argparse.ArgumentParser(prog=PROGNAME)
    cliutil.add_version_argument(parser)
    parser.add_argument(
        '--report-type', '-t',
        metavar='NAME',
        type=ReportType.by_name,
        help="""The type of report to generate, one of `aging`, `balance`, or
`outgoing`. If not specified, the default is `aging` when no search terms are
given, `outgoing` for search terms that return a single outstanding payable,
and `balance` any other time.
""")
    parser.add_argument(
        '--since',
        metavar='YEAR',
        type=int,
        default=0,
        help="""How far back to search the books for related transactions.
You can either specify a fiscal year, or a negative offset from the current
fiscal year, to start loading entries from. The default is to load the current,
unaudited books.
""")
    parser.add_argument(
        '--output-file', '-O',
        metavar='PATH',
        type=Path,
        help="""Write the report to this file, or stdout when PATH is `-`.
The default is stdout for the balance and outgoing reports, and a generated
filename for other reports.
""")
    cliutil.add_loglevel_argument(parser)
    parser.add_argument(
        'search_terms',
        metavar='FILTER',
        type=cliutil.SearchTerm.arg_parser('invoice', 'rt-id'),
        nargs=argparse.ZERO_OR_MORE,
        help="""Report on accruals that match this criteria. The format is
NAME=TERM. TERM is a link or word that must exist in a posting's NAME
metadata to match. A single ticket number is a shortcut for
`rt-id=rt:NUMBER`. Any other link, including an RT attachment link in
`TIK/ATT` format, is a shortcut for `invoice=LINK`.
""")
    args = parser.parse_args(arglist)
    if args.report_type is None and not any(
            term.meta_key == 'invoice' or term.meta_key == 'rt-id'
            for term in args.search_terms
    ):
        args.report_type = ReportType.AGING
    return args

def main(arglist: Optional[Sequence[str]]=None,
         stdout: TextIO=sys.stdout,
         stderr: TextIO=sys.stderr,
         config: Optional[configmod.Config]=None,
) -> int:
    args = parse_arguments(arglist)
    cliutil.set_loglevel(logger, args.loglevel)
    if config is None:
        config = configmod.Config()
        config.load_file()

    returncode = 0
    books_loader = config.books_loader()
    if books_loader is None:
        entries, load_errors, _ = books.Loader.load_none(config.config_file_path())
    else:
        load_since = None if args.report_type == ReportType.AGING else args.since
        entries, load_errors, _ = books_loader.load_all(load_since)
    filters.remove_opening_balance_txn(entries)
    for error in load_errors:
        bc_printer.print_error(error, file=stderr)
        returncode |= ReturnFlag.LOAD_ERRORS

    postings = list(filter_search(
        data.Posting.from_entries(entries), args.search_terms,
    ))
    if not postings:
        logger.warning("no matching entries found to report")
        returncode |= ReturnFlag.NOTHING_TO_REPORT
    # groups is a mapping of metadata value strings to AccrualPostings.
    # The keys are basically arbitrary, the report classes don't rely on them,
    # but they do help symbolize what's being grouped.
    # For the outgoing approval report, groups maps rt-id link strings to
    # associated accruals.
    # For all other reports, groups comes from AccrualReport.make_consistent().
    groups: PostGroups
    if args.report_type is None or args.report_type is ReportType.OUTGOING:
        groups = dict(AccrualPostings.group_by_first_meta_link(postings, 'rt-id'))
        if args.report_type is None and len(groups) == 1:
            key = next(iter(groups))
            group = groups[key]
            account = group[0].account
            if (AccrualAccount.by_account(account) is AccrualAccount.PAYABLE
                and all(post.account == account for post in group)
                and not group.balance().ge_zero()
                and key):  # Make sure we have a usable rt-id
                args.report_type = ReportType.OUTGOING
    if args.report_type is not ReportType.OUTGOING:
        groups = dict(AccrualPostings.make_consistent(postings))
    if args.report_type is not ReportType.AGING:
        groups = {
            key: posts for key, posts in groups.items() if not posts.is_paid()
        } or groups
    del postings

    report: Optional[BaseReport] = None
    output_path: Optional[Path] = None
    if args.report_type is ReportType.AGING:
        rt_wrapper = config.rt_wrapper()
        if rt_wrapper is None:
            logger.error("unable to generate aging report: RT client is required")
        else:
            now = datetime.datetime.now()
            if args.output_file is None:
                out_dir_path = config.repository_path() or Path()
                args.output_file = out_dir_path / now.strftime('AgingReport_%Y-%m-%d_%H:%M.ods')
                logger.info("Writing report to %s", args.output_file)
            out_bin = cliutil.bytes_output(args.output_file, stdout)
            report = AgingReport(rt_wrapper, out_bin)
    elif args.report_type is ReportType.OUTGOING:
        rt_wrapper = config.rt_wrapper()
        if rt_wrapper is None:
            logger.error("unable to generate outgoing report: RT client is required")
        else:
            out_file = cliutil.text_output(args.output_file, stdout)
            report = OutgoingReport(rt_wrapper, out_file)
    else:
        out_file = cliutil.text_output(args.output_file, stdout)
        report = BalanceReport(out_file)

    if report is None:
        returncode |= ReturnFlag.REPORT_ERRORS
    else:
        report.run(groups)
    return 0 if returncode == 0 else 16 + returncode

entry_point = cliutil.make_entry_point(__name__, PROGNAME)

if __name__ == '__main__':
    exit(entry_point())