<?php

declare(strict_types = 1);

/**
 * This file is part of the 'Yasumi' package.
 *
 * The easy PHP Library for calculating holidays.
 *
 * Copyright (c) 2015 - 2026 AzuyaLabs
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @author Sacha Telgenhof <me at sachatelgenhof dot com>
 */

namespace Yasumi\Provider;

use Yasumi\Exception\UnknownLocaleException;
use Yasumi\Holiday;

/**
 * Provider for all holidays in Argentina.
 */
class Argentina extends AbstractProvider
{
    use CommonHolidays;
    use ChristianHolidays;

    public const PROCLAMATION_OF_INDEPENDENCE_YEAR = 1816;

    /**
     * Code to identify this Holiday Provider. Typically, this is the ISO3166
     * code corresponding to the respective country or sub-region.
     */
    public const ID = 'AR';

    /**
     * Initialize holidays for Argentina.
     *
     * @throws \InvalidArgumentException
     * @throws UnknownLocaleException
     * @throws \Exception
     */
    public function initialize(): void
    {
        $this->timezone = 'America/Argentina/Buenos_Aires';

        // Add common holidays
        $this->addHoliday($this->newYearsDay($this->year, $this->timezone, $this->locale));
        $this->addHoliday($this->internationalWorkersDay($this->year, $this->timezone, $this->locale));

        // Add official Christian holidays
        $this->addHoliday($this->christmasDay($this->year, $this->timezone, $this->locale));
        $this->addHoliday($this->goodFriday($this->year, $this->timezone, $this->locale));

        $this->addCarnavalHolidays();
        $this->addRemembranceDay();
        $this->addMalvinasDay();
        $this->addMayRevolution();
        $this->addFlagDay();
        $this->addIndependenceDay();
        $this->addImmaculateConceptionDay();

        // Add movable holidays (these must be added after all immovable official holidays and
        // before non-official holidays).
        $this->addGeneralMartinMigueldeGuemesDay();
        $this->addGeneralJoseSanMartinDay();
        $this->addRaceDay();
        $this->addNationalSovereigntyDay();

        // Non-official holidays
        $this->addHoliday($this->easter($this->year, $this->timezone, $this->locale, Holiday::TYPE_OBSERVANCE));
    }

    /**
     * The source of the holidays.
     *
     * @return string[] The source URL
     */
    public function getSources(): array
    {
        return [
            'https://en.wikipedia.org/wiki/Public_holidays_in_Argentina',
            'https://www.argentina.gob.ar/interior/feriados-nacionales-2025',
            'https://www.argentina.gob.ar/normativa/nacional/ley-27399-281835/texto',
            'https://www.argentina.gob.ar/normativa/nacional/decreto-789-2021-356678/texto',
        ];
    }

    /**
     * Carnaval.
     *
     * Carnaval is the biggest popular festival of country. The festival
     * happens on Day 48 and 47 before Easter.
     *
     * @see https://en.wikipedia.org/wiki/Brazilian_Carnival
     */
    protected function addCarnavalHolidays(): void
    {
        if ($this->year >= 1700) {
            $easter = $this->calculateEaster($this->year, $this->timezone);

            $days = [
                'carnavalMonday' => [
                    'interval' => 'P48D',
                    'name' => 'Lunes de Carnaval',
                    'name_en' => 'Carnival Monday',
                ],
                'carnavalTuesday' => [
                    'interval' => 'P47D',
                    'name' => 'Martes de Carnaval',
                    'name_en' => 'Carnival Tuesday',
                ],
            ];

            foreach ($days as $name => $day) {
                $date = (clone $easter)->sub(new \DateInterval($day['interval']));

                if (! $date instanceof \DateTime) {
                    throw new \RuntimeException(sprintf('unable to perform a date subtraction for %s:%s', self::class, $name));
                }

                $this->addHoliday(new Holiday(
                    $name,
                    [
                        'es' => $day['name'],
                        'en' => $day['name_en'],
                    ],
                    $date,
                    $this->locale
                ));
            }
        }
    }

    /*
     * Day of Remembrance for Truth and Justice.
     *
     * The Day of Remembrance for Truth and Justice (Spanish: Día de la
     * Memoria por la Verdad y la Justicia) is a public holiday in
     * Argentina, commemorating the victims of the Dirty War. It is held on
     * 24 March, the anniversary of the coup d'état of 1976 that brought the
     *  National Reorganization Process to power.
     *
     * @link https://en.wikipedia.org/wiki/Day_of_Remembrance_for_Truth_and_Justice
     */
    protected function addRemembranceDay(): void
    {
        if ($this->year >= 2006) {
            $this->addHoliday(new Holiday(
                'remembranceDay',
                [
                    'en' => 'Day of Remembrance for Truth and Justice',
                    'es' => 'Día Nacional de la Memoria por la Verdad y la Justicia',
                ],
                new \DateTime("{$this->year}-03-24", DateTimeZoneFactory::getDateTimeZone($this->timezone)),
                $this->locale
            ));
        }
    }

    /*
     * Malvinas Day.
     *
     * Malvinas Day (Spanish: Día de las Malvinas), officially Day of the
     * Veterans and Fallen of the Malvinas War (Día del Veterano y de los
     * Caídos en la Guerra de las Malvinas), is a public holiday in
     * Argentina, observed each year on 2 April.[1] The name refers to the
     * Malvinas Islands, known in Spanish as the Islas Malvinas.
     *
     * @link https://en.wikipedia.org/wiki/Malvinas_Day
     */
    protected function addMalvinasDay(): void
    {
        if ($this->year >= 1982) {
            $this->addHoliday(new Holiday(
                'malvinasDay',
                [
                    'en' => 'Malvinas Day',
                    'es' => 'Día del Veterano y de los Caídos en la Guerra de Malvinas',
                ],
                new \DateTime("{$this->year}-04-02", DateTimeZoneFactory::getDateTimeZone($this->timezone)),
                $this->locale
            ));
        }
    }

    /*
     * First National Government.
     *
     * The Anniversary of the First National Government
     * (Spanish: Primer gobierno patrio) is a public holiday of Argentina,
     * commemorating the May Revolution and the creation of the Primera
     * Junta on May 25, 1810, which is considered the first patriotic
     * government of Argentina. Along with the 9 July, which commemorates
     * the Declaration of Independence, it is considered a National Day of
     * Argentina.
     *
     * @link https://en.wikipedia.org/wiki/First_National_Government
     */
    protected function addMayRevolution(): void
    {
        if ($this->year >= 1810) {
            $this->addHoliday(new Holiday(
                'mayRevolution',
                [
                    'en' => 'May Revolution',
                    'es' => 'Día de la Revolución de Mayo',
                ],
                new \DateTime("{$this->year}-05-25", DateTimeZoneFactory::getDateTimeZone($this->timezone)),
                $this->locale
            ));
        }
    }

    /*
     * Anniversary of the Passing of General Martín Miguel de Güemes.
     *
     * Anniversary of the death of Martín Miguel de Güemes, general of the
     * Argentine War of Independence.
     */
    protected function addGeneralMartinMigueldeGuemesDay(): void
    {
        if ($this->year >= 1821) {
            $this->addHoliday(new Holiday(
                'generalMartinMigueldeGuemesDay',
                [
                    'en' => 'Anniversary of the Passing of General Martín Miguel de Güemes',
                    'es' => 'Paso a la Inmortalidad del General Martín Miguel de Güemes',
                ],
                $this->adjustMovableHoliday(new \DateTime("{$this->year}-06-17", DateTimeZoneFactory::getDateTimeZone($this->timezone))),
                $this->locale
            ));
        }
    }

    /*
     * General Manuel Belgrano Memorial Day.
     *
     * Anniversary of the death of Manuel Belgrano, creator of the Flag of
     * Argentina.
     *
     * @link https://en.wikipedia.org/wiki/Flag_Day_(Argentina)
     */
    protected function addFlagDay(): void
    {
        if ($this->year >= 1938) {
            $this->addHoliday(new Holiday(
                'flagDay',
                [
                    'en' => 'General Manuel Belgrano Memorial Day',
                    'es' => 'Paso a la Inmortalidad del General Manuel Belgrano',
                ],
                new \DateTime("{$this->year}-06-20", DateTimeZoneFactory::getDateTimeZone($this->timezone)),
                $this->locale
            ));
        }
    }

    /*
     * Independence Day.
     *
     * Anniversary of the Declaration of Independence in 1816.
     *
     * @link https://en.wikipedia.org/wiki/Argentine_Declaration_of_Independence
     */
    protected function addIndependenceDay(): void
    {
        if ($this->year >= self::PROCLAMATION_OF_INDEPENDENCE_YEAR) {
            $this->addHoliday(new Holiday(
                'independenceDay',
                [
                    'en' => 'Independence Day',
                    'es' => 'Día de la Independencia',
                ],
                new \DateTime("{$this->year}-07-09", DateTimeZoneFactory::getDateTimeZone($this->timezone)),
                $this->locale
            ));
        }
    }

    /*
     * General José de San Martín Memorial Day.
     *
     * Anniversary of the death of José de San Martín, liberator of
     * Argentina, Chile and Peru.
     */
    protected function addGeneralJoseSanMartinDay(): void
    {
        if ($this->year >= 1850) {
            $this->addHoliday(new Holiday(
                'generalJoseSanMartinDay',
                [
                    'en' => 'General José de San Martín Memorial Day',
                    'es' => 'Paso a la Inmortalidad del General José de San Martín',
                ],
                $this->adjustMovableHoliday(new \DateTime("{$this->year}-08-17", DateTimeZoneFactory::getDateTimeZone($this->timezone))),
                $this->locale
            ));
        }
    }

    /*
     * Day of Respect for Cultural Diversity.
     *
     * Former "Día de la raza" (English: Race day), anniversary of the
     * arrival of Columbus to the Americas.
     *
     * @link https://en.wikipedia.org/wiki/Columbus_Day
     */
    protected function addRaceDay(): void
    {
        if ($this->year >= 1492) {
            $this->addHoliday(new Holiday(
                'raceDay',
                [
                    'en' => 'Day of Respect for Cultural Diversity',
                    'es' => 'Día del Respeto a la Diversidad Cultural',
                ],
                $this->adjustMovableHoliday(new \DateTime("{$this->year}-10-12", DateTimeZoneFactory::getDateTimeZone($this->timezone))),
                $this->locale
            ));
        }
    }

    /*
     * National Sovereignty Day.
     *
     * Anniversary of the 1845 Battle of Vuelta de Obligado against the
     * Anglo-French blockade of the Río de la Plata.
     *
     * @link https://en.wikipedia.org/wiki/National_Sovereignty_Day
     */
    protected function addNationalSovereigntyDay(): void
    {
        if ($this->year >= 2010) {
            $this->addHoliday(new Holiday(
                'nationalSovereigntyDay',
                [
                    'en' => 'National Sovereignty Day',
                    'es' => 'Día de la Soberanía Nacional',
                ],
                $this->adjustMovableHoliday(new \DateTime("{$this->year}-11-20", DateTimeZoneFactory::getDateTimeZone($this->timezone))),
                $this->locale
            ));
        }
    }

    /*
     * Immaculate Conception Day.
     *
     * Christian holiday, conception of the Virgin Mary free from original
     * sin.
     *
     * @link https://en.wikipedia.org/wiki/Immaculate_Conception
     */
    protected function addImmaculateConceptionDay(): void
    {
        if ($this->year >= 1900) {
            $this->addHoliday(new Holiday(
                'immaculateConceptionDay',
                [
                    'en' => 'Immaculate Conception Day',
                    'es' => 'Día de la Inmaculada Concepción de María',
                ],
                new \DateTime("{$this->year}-12-08", DateTimeZoneFactory::getDateTimeZone($this->timezone)),
                $this->locale
            ));
        }
    }

    /**
     * Adjusts a movable holiday.
     *
     * If certain holidays fall on a weekday, they are moved to a Monday in order to provide "long weekends".
     * If the holiday falls on a Tuesday or Wednesday, it is moved to the previous Monday; if it falls on
     * a Thursday or Friday, it is moved to the following Monday.
     *
     * These rules were introduced in 2017. Previously the were different rules which are currently not supported
     * by Yasumi.
     */
    protected function adjustMovableHoliday(\DateTime $dateTime): \DateTime
    {
        if ($this->year >= 2017) {
            $adjustedDateTime = clone $dateTime;
            switch ($adjustedDateTime->format('w')) {
                case 2:
                    $adjustedDateTime->sub(new \DateInterval('P1D'));
                    break;
                case 3:
                    $adjustedDateTime->sub(new \DateInterval('P2D'));
                    break;
                case 4:
                    $adjustedDateTime->add(new \DateInterval('P4D'));
                    break;
                case 5:
                    $adjustedDateTime->add(new \DateInterval('P3D'));
                    break;
            }

            if (! $this->isHoliday($adjustedDateTime)) {
                $dateTime = $adjustedDateTime;
            }
        }

        return $dateTime;
    }
}
