#  holidays
#  --------
#  A fast, efficient Python library for generating country, province and state
#  specific sets of holidays on the fly. It aims to make determining whether a
#  specific date is a holiday as fast and flexible as possible.
#
#  Authors: Vacanza Team and individual contributors (see CONTRIBUTORS file)
#           dr-prodigy <dr.prodigy.github@gmail.com> (c) 2017-2023
#           ryanss <ryanssdev@icloud.com> (c) 2014-2017
#  Website: https://github.com/vacanza/holidays
#  License: MIT (see LICENSE file)

from gettext import gettext as tr

from holidays.calendars.gregorian import MAY, SEP, _get_nth_week_of_month, _timedelta
from holidays.constants import PUBLIC, WORKDAY
from holidays.groups import InternationalHolidays, MongolianCalendarHolidays
from holidays.holiday_base import HolidayBase


class Mongolia(HolidayBase, InternationalHolidays, MongolianCalendarHolidays):
    """Mongolia holidays.

    References:
        * [Law on Public holidays and days of observation](https://web.archive.org/web/20250327062440/https://legalinfo.mn/mn/detail/399)
        * [Labor Law](https://web.archive.org/web/20250421093230/https://legalinfo.mn/mn/detail?lawId=16230709635751)
        * <https://en.wikipedia.org/wiki/Public_holidays_in_Mongolia>
        * [Mongolian lunar calendar](https://web.archive.org/web/20230412171012/https://www.math.mcgill.ca/gantumur/cal/index_mn.html)
        * <https://web.archive.org/web/20250613054645/https://www.timeanddate.com/holidays/mongolia/>
        * <https://web.archive.org/web/20250429110535/https://investmongolia.gov.mn/mongolia-at-a-glance/>
    """

    country = "MN"
    default_language = "mn"
    # %s (estimated).
    estimated_label = tr("%s (урьдчилсан)")
    start_year = 2004
    supported_categories = (PUBLIC, WORKDAY)
    supported_languages = ("en_US", "mn")

    def __init__(self, *args, **kwargs):
        InternationalHolidays.__init__(self)
        MongolianCalendarHolidays.__init__(self)
        super().__init__(*args, **kwargs)

    def _populate_public_holidays(self):
        # New Year's Day.
        self._add_new_years_day(tr("Шинэ жил"))

        # Lunar New Year.
        name = tr("Цагаан сар")
        self._add_tsagaan_sar(name)
        self._add_tsagaan_sar_day_2(name)
        # Expanded on November 28th, 2013.
        if self._year >= 2014:
            self._add_tsagaan_sar_day_3(name)

        # International Women's Day.
        self._add_womens_day(tr("Олон улсын эмэгтэйчүүдийн өдөр"))

        # Children's Day.
        self._add_childrens_day(tr("Хүүхдийн баяр"))

        # Established on December 20th, 2019.
        if self._year >= 2020:
            # The Buddha's Birthday.
            self._add_buddha_day(tr("Бурхан багшийн Их дүйчин өдөр"))

        # National Festival and People's Revolution Anniversary.
        name = tr("Үндэсний их баяр наадам, Ардын хувьсгалын ойн баяр")
        # Expanded to July 10 on July 7th, 2023.
        if self._year >= 2023:
            self._add_holiday_jul_10(name)
        self._add_holiday_jul_11(name)
        self._add_holiday_jul_12(name)
        self._add_holiday_jul_13(name)
        # Expanded to July 14-15 on July 1st, 2014.
        if self._year >= 2014:
            self._add_holiday_jul_14(name)
            self._add_holiday_jul_15(name)

        # Established on November 8th, 2012.
        if self._year >= 2012:
            # Genghis Khan's Birthday.
            self._add_genghis_khan_day(tr("Их Эзэн Чингис хааны өдөр"))

        # Repealed on November 8th, 2012.
        # Re-established again on November 18th, 2016.
        if self._year <= 2011 or self._year >= 2016:
            self._add_holiday_nov_26(
                # Republic Day.
                tr("Бүгд Найрамдах Улс тунхагласан өдөр")
                if self._year >= 2016
                # Republic Holiday.
                else tr("Бүгд Найрамдах Улс тунхагласны баяр")
            )

        # Established on August 16th, 2007.
        # Renamed and considered a Public Holiday on December 23rd, 2011.
        if self._year >= 2011:
            self._add_holiday_dec_29(
                # National Freedom and Independence Day.
                tr("Үндэсний эрх чөлөө, тусгаар тогтнолоо сэргээсний баярын өдөр")
            )

    def _populate_workday_holidays(self):
        # Constitution Day.
        self._add_holiday_jan_13(tr("Монгол Улсын Үндсэн хуулийн өдөр"))

        # Established on December 9th, 2004.
        if self._year >= 2005:
            # Patriots' Day.
            self._add_holiday_mar_1(tr("Эх орончдын өдөр"))

        # Renamed on February 9th, 2011.
        self._add_holiday_mar_18(
            # Military Day.
            tr("Монгол цэргийн өдөр")
            if self._year >= 2011
            # Armed Forces Day.
            else tr("Зэвсэгт хүчний өдөр")
        )

        # Health Protection Day.
        self._add_holiday_apr_7(tr("Эрүүл мэндийг хамгаалах өдөр"))

        # Intellectual Property Protection Day.
        self._add_holiday_apr_26(tr("Оюуны өмчийг хамгаалах өдөр"))

        # Family Day.
        self._add_holiday_may_15(tr("Гэр бүлийн өдөр"))

        # Established on June 11th, 2009.
        if self._year >= 2009:
            # National Flag Day.
            self._add_holiday_jul_10(tr("Монгол Улсын төрийн далбааны өдөр"))

        # Youth Day.
        self._add_holiday_aug_25(tr("Залуучуудын өдөр"))

        if self._year >= 2007:
            # New Harvest Days.
            self._add_multiday_holiday(self._add_holiday_sep_5(tr("Шинэ ургацын өдрүүд")), 45)

        # Memorial Day of Political Victims.
        self._add_holiday_sep_10(tr("Улс төрийн хэлмэгдэгсдийн дурсгалын өдөр"))

        # Established on July 2nd, 2021.
        if self._year >= 2021:
            # National Literary, Cultural and Book Days.
            name = tr("Үндэсний бичиг соёл, номын өдрүүд")
            sep_third_week_start = _get_nth_week_of_month(3, SEP, self._year)
            self._add_holiday(name, _timedelta(sep_third_week_start, +5))
            self._add_holiday(name, _timedelta(sep_third_week_start, +6))

            if self._year >= 2022:
                may_third_week_start = _get_nth_week_of_month(3, MAY, self._year)
                self._add_holiday(name, _timedelta(may_third_week_start, +5))
                self._add_holiday(name, _timedelta(may_third_week_start, +6))

        self._add_multiday_holiday(
            self._add_holiday(
                # Environmental Protection Days.
                tr("Байгаль орчныг хамгаалах өдрүүд"),
                _get_nth_week_of_month(4, SEP, self._year),
            ),
            6,
        )

        # Elders' Day.
        self._add_holiday_oct_1(tr("Ахмадын өдөр"))

        # Renamed on July 7th, 2021.
        self._add_holiday_oct_29(
            # Capital City Day.
            tr("Монгол Улсын нийслэл хотын өдөр")
            if self._year >= 2021
            # Capital Day.
            else tr("Монгол Улсын Нийслэлийн өдөр")
        )

        # Established on November 8th, 2012 after the old one was repealed.
        # Made a Public Holiday again on November 8th, 2016.
        if 2012 <= self._year <= 2015:
            # Republic Day.
            self._add_holiday_nov_26(tr("Бүгд Найрамдах Улс тунхагласан өдөр"))

        # Democracy and Human Rights Day.
        self._add_holiday_dec_10(tr("Ардчилал, хүний эрхийн өдөр"))

        # Established on August 16th, 2007.
        # Renamed and considered a Public Holiday on December 23rd, 2011.
        if 2007 <= self._year <= 2010:
            # National Freedom Day.
            self._add_holiday_dec_29(tr("Үндэсний эрх чөлөөний өдөр"))


class MN(Mongolia):
    pass


class MNG(Mongolia):
    pass