#  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 datetime import date
from gettext import gettext as tr
from typing import Optional

from holidays.calendars.gregorian import AUG, SEP
from holidays.groups import ChristianHolidays, InternationalHolidays, StaticHolidays
from holidays.observed_holiday_base import (
    ObservedHolidayBase,
    TUE_TO_PREV_MON,
    THU_TO_NEXT_FRI,
    SUN_TO_NEXT_MON,
)


class Angola(ObservedHolidayBase, ChristianHolidays, InternationalHolidays, StaticHolidays):
    """Angola holidays.

    References:
        * <https://en.wikipedia.org/wiki/Public_holidays_in_Angola>
        * <http://www.siac.gv.ao/downloads/181029-Lei-Feriados.pdf>
        * [Decree #5/75](https://www.lexlink.eu/FileGet.aspx?FileId=3023486)
        * [Decree #92/80](https://www.lexlink.eu/FileGet.aspx?FileId=3023473)
        * [Decree #7/92](https://www.lexlink.eu/FileGet.aspx?FileId=3023485)
        * [Law #16/96](https://www.lexlink.eu/FileGet.aspx?FileId=3037036)
        * [Law #1/01](https://www.lexlink.eu/FileGet.aspx?FileId=3029035)
        * [Law #7/03](https://www.lexlink.eu/FileGet.aspx?FileId=3002131)
        * [Law #10/11](https://equadros.gov.ao/documents/40468/0/lei_10_11-1+%281%29.pdf)
        * [Law #11/18](https://equadros.gov.ao/documents/40468/0/Lei_no_11-18+%281%29.pdf)
        * <https://www.officeholidays.com/countries/angola/>
        * <https://www.timeanddate.com/holidays/angola/>
    """

    country = "AO"
    default_language = "pt_AO"
    supported_languages = ("en_US", "pt_AO", "uk")
    # %s (observed).
    observed_label = tr("%s (ponte)")
    # Decree #5/75.
    start_year = 1975

    def __init__(self, *args, **kwargs):
        ChristianHolidays.__init__(self)
        InternationalHolidays.__init__(self)
        StaticHolidays.__init__(self, cls=AngolaStaticHolidays)
        kwargs.setdefault("observed_rule", TUE_TO_PREV_MON + THU_TO_NEXT_FRI)
        super().__init__(*args, **kwargs)

    def _is_observed(self, dt: date) -> bool:
        # As per Law # 16/96, from 1996/9/27, when public holiday falls on Sunday,
        # it rolls over to the following Monday.
        return dt >= date(1996, SEP, 27)

    def _add_observed(self, dt: date, **kwargs) -> tuple[bool, Optional[date]]:
        # As per Law # #11/18, from 2018/9/10, when public holiday falls on Tuesday or Thursday,
        # the Monday or Friday is also a holiday.
        kwargs.setdefault(
            "rule", SUN_TO_NEXT_MON if dt < date(2018, SEP, 10) else self._observed_rule
        )
        return super()._add_observed(dt, **kwargs)

    def _populate_public_holidays(self):
        # New Year's Day.
        name = tr("Dia do Ano Novo")
        dt = self._add_new_years_day(name)
        if self._year <= 2011 or self._year >= 2018:
            self._add_observed(dt)
            self._add_observed(self._next_year_new_years_day, name=name)

        # Law #16/96.
        if 1997 <= self._year <= 2011:
            self._add_observed(
                # Martyrs of Colonial Repression Day.
                self._add_holiday_jan_4(tr("Dia dos Mártires da Repressão Colonial"))
            )

        self._add_observed(
            self._add_holiday_feb_4(
                # Beginning of the Armed Struggle for National Liberation Day.
                tr("Dia do Início da Luta Armada de Libertação Nacional")
                if self._year >= 2012
                # Beginning of the Armed Struggle Day.
                else tr("Dia do Início da Luta Armada")
            )
        )

        # Law #16/96.
        if self._year >= 1997:
            # Carnival Day.
            self._add_observed(self._add_carnival_tuesday(tr("Dia do Carnaval")))

            # International Women's Day.
            self._add_observed(self._add_womens_day(tr("Dia Internacional da Mulher")))

        # Law #11/18.
        if self._year >= 2019:
            # Southern Africa Liberation Day.
            self._add_observed(self._add_holiday_mar_23(tr("Dia da Libertação da África Austral")))

        # Law #7/03.
        if self._year >= 2003:
            # Peace and National Reconciliation Day.
            self._add_observed(self._add_holiday_apr_4(tr("Dia da Paz e Reconciliação Nacional")))

        # Law #16/96.
        if self._year >= 1997:
            # Good Friday.
            self._add_good_friday(tr("Sexta-Feira Santa"))

        # International Worker's Day.
        self._add_observed(self._add_labor_day(tr("Dia Internacional do Trabalhador")))

        # Law #1/01.
        if 2001 <= self._year <= 2010:
            # Africa Day.
            self._add_observed(self._add_africa_day(tr("Dia da África")))

        # Law #16/96.
        if 1997 <= self._year <= 2010:
            # International Children's Day.
            self._add_observed(self._add_childrens_day(tr("Dia Internacional da Criança")))

        # Decree #92/80.
        if self._year >= 1980:
            self._add_observed(
                # National Heroes' Day.
                self._add_holiday_sep_17(tr("Dia do Fundador da Nação e do Herói Nacional"))
            )

        # All Souls' Day.
        dt = self._add_all_souls_day(tr("Dia dos Finados"))
        if self._year <= 2010 or self._year >= 2018:
            self._add_observed(dt)

        self._add_observed(
            self._add_holiday_nov_11(
                # National Independence Day.
                tr("Dia da Independência Nacional")
                if self._year >= 1996
                # Independence Day.
                else tr("Dia da Independência")
            )
        )

        # Decree # 7/92.
        if self._year <= 1991:
            # Date of Founding of MPLA - Labor Party.
            self._add_holiday_dec_10(tr("Data da Fundacao do MPLA - Partido do Trabalho"))

        dt = self._add_christmas_day(
            # Christmas and Family Day.
            tr("Dia de Natal e da Família")
            if self._year >= 2011
            else (
                tr("Dia do Natal")  # Christmas Day.
                if self._year >= 1996
                else tr("Dia da Família")  # Family Day.
            )
        )
        if self._year <= 2010 or self._year >= 2018:
            self._add_observed(dt)


class AO(Angola):
    pass


class AGO(Angola):
    pass


class AngolaStaticHolidays:
    special_public_holidays = {
        # General Election Day.
        2017: (AUG, 23, tr("Dia de eleições gerais")),
    }