# The Mia! Accounting Flask Project.
# Author: imacat@mail.imacat.idv.tw (imacat), 2023/3/6

#  Copyright (c) 2023 imacat.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
"""The page parameters of a report.

"""
from abc import ABC, abstractmethod
from urllib.parse import urlparse, ParseResult, parse_qsl, urlencode, \
    urlunparse

from flask import request
import typing as t

from accounting.report.report_chooser import ReportChooser
from accounting.utils.txn_types import TransactionType


class PageParams(ABC):
    """The page parameters of a report."""

    @property
    @abstractmethod
    def has_data(self) -> bool:
        """Returns whether there is any data on the page.

        :return: True if there is any data, or False otherwise.
        """

    @property
    @abstractmethod
    def report_chooser(self) -> ReportChooser:
        """Returns the report chooser.

        :return: The report chooser.
        """

    @property
    def txn_types(self) -> t.Type[TransactionType]:
        """Returns the transaction types.

        :return: The transaction types.
        """
        return TransactionType

    @property
    def csv_uri(self) -> str:
        uri: str = request.full_path if request.query_string \
            else request.path
        uri_p: ParseResult = urlparse(uri)
        params: list[tuple[str, str]] = parse_qsl(uri_p.query)
        params = [x for x in params if x[0] != "as"]
        params.append(("as", "csv"))
        parts: list[str] = list(uri_p)
        parts[4] = urlencode(params)
        return urlunparse(parts)