self.rt_wrapper = rt_wrapper

        self.date = date

        self.logger = logger

    def init_styles(self) -> None:

        super().init_styles()

        self.style_widecol = self.replace_child(

            self.document.automaticstyles,

            odf.style.Style,

            name='WideCol',

        )

        self.style_widecol.setAttribute('family', 'table-column')

        self.style_widecol.addElement(odf.style.TableColumnProperties(

            columnwidth='1.25in',

        ))

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

        if isinstance(row.account, str):

            return row.account

        else:

            return None

    def start_spreadsheet(self) -> None:

        for accrual_type in AccrualAccount:

            self.use_sheet(accrual_type.name.title())

            for index in range(self.COL_COUNT):

                stylename = self.style_widecol if index else ''

                self.sheet.addElement(odf.table.TableColumn(stylename=stylename))

            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: Optional[data.Account]) -> None:

        if key is None:

            return

        self.age_thresholds = list(AccrualAccount.by_account(key).value.aging_thresholds)

        self.age_balances = [core.MutableBalance() for _ in self.age_thresholds]

        accrual_date = self.date - datetime.timedelta(days=self.age_thresholds[-1])

        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" Accrued by {accrual_date.isoformat()} Unpaid by {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: Optional[data.Account]) -> None:

        if key is None:

            return

        total_balance = core.MutableBalance()

        text_style = self.merge_styles(self.style_bold, self.style_endtext)

        text_span = 4

        last_age_text: Optional[str] = None

        self.add_row()

        for threshold, balance in zip(self.age_thresholds, self.age_balances):

            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}"

            else:

                age_range = f"{age_text}–{last_age_text}"

            self.add_row(

                self.string_cell(

                    f"Total Aged {age_range}: ",

                    stylename=text_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=text_style,

                numbercolumnsspanned=text_span,

            ),

            *(odf.table.TableCell() for _ in range(1, text_span)),

            self.balance_cell(total_balance),

        )

    def _link_seq(self, row: AccrualPostings, key: MetaKey) -> Iterator[Tuple[str, str]]:

        for href in row.all_meta_links(key):

            rt_ids = self.rt_wrapper.parse(href)

                # '..' pops the ODS filename off the link path. In other words,

                # make the link relative to the directory the ODS is in.

                text = urlparse.unquote(href_path.name)

            yield (href, text)

    def write_row(self, row: AccrualPostings) -> None:

        age = (self.date - row[0].meta.date).days

        if row.end_balance.ge_zero():

            for index, threshold in enumerate(self.age_thresholds):

                if age >= threshold:

                    self.age_balances[index] += row.end_balance

                    break

            else:

                return

        raw_balance = row.balance()

        if row.accrual_type is not None:

            raw_balance = row.accrual_type.normalize_amount(raw_balance)

        if raw_balance == row.end_balance:

            amount_cell = odf.table.TableCell()

        else:

            amount_cell = self.balance_cell(raw_balance)

        projects = {post.meta.get('project') or None for post in row}

        projects.discard(None)

        self.add_row(

            self.date_cell(row[0].meta.date),

            self.multiline_cell(row.entities()),

            amount_cell,

            self.balance_cell(row.end_balance),

            self.multiline_cell(sorted(projects)),

            self.multilink_cell(self._link_seq(row, 'rt-id')),

            self.multilink_cell(self._link_seq(row, 'invoice')),

            self.multilink_cell(self._link_seq(row, 'approval')),

            self.multilink_cell(self._link_seq(row, 'contract')),

            self.multilink_cell(self._link_seq(row, 'purchase-order')),

        )

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: List[AccrualPostings] = []

        for group in groups.values():

            if group.is_zero():

                # Cheap optimization: don't slice and dice groups we're not

                # going to report anyway.

                continue

            elif group.accrual_type is None:

                group = group.since_last_nonzero()

            else:

                # Filter out new accruals after the report date.

                # e.g., cover the case that the same invoices has multiple

                # postings over time, and we don't want to report too-recent

                # ones.

                cutoff_date = self.ods.date - datetime.timedelta(

                    days=group.accrual_type.value.aging_thresholds[-1],

                )

                group = AccrualPostings(

                    post for post in group.since_last_nonzero()

                    if post.meta.date <= cutoff_date

                    or group.accrual_type.normalize_amount(post.units.number) < 0

                )

            if group and not group.is_zero():

                rows.append(group)

        rows.sort(key=lambda related: (

            related.account,

            related[0].meta.date,

            ('\0'.join(related.entities())

             if related.entity is related.INCONSISTENT

             else related.entity),

        ))

        self.ods.write(rows)

        self.ods.save_file(self.out_bin)

class BalanceReport(BaseReport):

    def _report(self, posts: AccrualPostings, index: int) -> Iterable[str]:

        posts = posts.since_last_nonzero()

        date_s = posts[0].meta.date.strftime('%Y-%m-%d')

        if index:

            yield ""

        yield f"{posts.invoice}:"

        yield f"  {posts.balance_at_cost()} outstanding since {date_s}"

class OutgoingReport(BaseReport):

    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