<?php
declare(strict_types=1);

/**
 * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 * @link          https://cakephp.org CakePHP(tm) Project
 * @since         4.0.0
 * @license       https://opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\I18n;

use Cake\Chronos\ChronosInterface;
use Cake\Chronos\DifferenceFormatterInterface;
use JsonSerializable;

/**
 * Interface for date formatting methods shared by both Time & Date.
 */
interface I18nDateTimeInterface extends ChronosInterface, JsonSerializable
{
    /**
     * Gets the default locale.
     *
     * @return string|null The default locale string to be used or null.
     */
    public static function getDefaultLocale(): ?string;

    /**
     * Sets the default locale.
     *
     * @param string|null $locale The default locale string to be used or null.
     * @return void
     */
    public static function setDefaultLocale(?string $locale = null): void;

    /**
     * Returns a nicely formatted date string for this object.
     *
     * The format to be used is stored in the static property `Time::niceFormat`.
     *
     * @param \DateTimeZone|string|null $timezone Timezone string or DateTimeZone object
     * in which the date will be displayed. The timezone stored for this object will not
     * be changed.
     * @param string|null $locale The locale name in which the date should be displayed (e.g. pt-BR)
     * @return string Formatted date string
     */
    public function nice($timezone = null, $locale = null): string;

    /**
     * Returns a formatted string for this time object using the preferred format and
     * language for the specified locale.
     *
     * It is possible to specify the desired format for the string to be displayed.
     * You can either pass `IntlDateFormatter` constants as the first argument of this
     * function, or pass a full ICU date formatting string as specified in the following
     * resource: http://www.icu-project.org/apiref/icu4c/classSimpleDateFormat.html#details.
     *
     * Additional to `IntlDateFormatter` constants and date formatting string you can use
     * Time::UNIX_TIMESTAMP_FORMAT to get a unix timestamp
     *
     * ### Examples
     *
     * ```
     * $time = new Time('2014-04-20 22:10');
     * $time->i18nFormat(); // outputs '4/20/14, 10:10 PM' for the en-US locale
     * $time->i18nFormat(\IntlDateFormatter::FULL); // Use the full date and time format
     * $time->i18nFormat([\IntlDateFormatter::FULL, \IntlDateFormatter::SHORT]); // Use full date but short time format
     * $time->i18nFormat('yyyy-MM-dd HH:mm:ss'); // outputs '2014-04-20 22:10'
     * $time->i18nFormat(Time::UNIX_TIMESTAMP_FORMAT); // outputs '1398031800'
     * ```
     *
     * If you wish to control the default format to be used for this method, you can alter
     * the value of the static `Time::$defaultLocale` variable and set it to one of the
     * possible formats accepted by this function.
     *
     * You can read about the available IntlDateFormatter constants at
     * https://secure.php.net/manual/en/class.intldateformatter.php
     *
     * If you need to display the date in a different timezone than the one being used for
     * this Time object without altering its internal state, you can pass a timezone
     * string or object as the second parameter.
     *
     * Finally, should you need to use a different locale for displaying this time object,
     * pass a locale string as the third parameter to this function.
     *
     * ### Examples
     *
     * ```
     * $time = new Time('2014-04-20 22:10');
     * $time->i18nFormat(null, null, 'de-DE');
     * $time->i18nFormat(\IntlDateFormatter::FULL, 'Europe/Berlin', 'de-DE');
     * ```
     *
     * You can control the default locale to be used by setting the static variable
     * `Time::$defaultLocale` to a valid locale string. If empty, the default will be
     * taken from the `intl.default_locale` ini config.
     *
     * @param string|int|null $format Format string.
     * @param \DateTimeZone|string|null $timezone Timezone string or DateTimeZone object
     * in which the date will be displayed. The timezone stored for this object will not
     * be changed.
     * @param string|null $locale The locale name in which the date should be displayed (e.g. pt-BR)
     * @return string|int Formatted and translated date string
     */
    public function i18nFormat($format = null, $timezone = null, $locale = null);

    /**
     * Resets the format used to the default when converting an instance of this type to
     * a string
     *
     * @return void
     */
    public static function resetToStringFormat(): void;

    /**
     * Sets the default format used when type converting instances of this type to string
     *
     * @param array<int>|string|int $format Format.
     * @return void
     */
    public static function setToStringFormat($format): void;

    /**
     * Sets the default format used when converting this object to JSON
     *
     * The format should be either the formatting constants from IntlDateFormatter as
     * described in (https://secure.php.net/manual/en/class.intldateformatter.php) or a pattern
     * as specified in (http://www.icu-project.org/apiref/icu4c/classSimpleDateFormat.html#details)
     *
     * It is possible to provide an array of 2 constants. In this case, the first position
     * will be used for formatting the date part of the object and the second position
     * will be used to format the time part.
     *
     * Alternatively, the format can provide a callback. In this case, the callback
     * can receive this datetime object and return a formatted string.
     *
     * @see \Cake\I18n\Time::i18nFormat()
     * @param \Closure|array|string|int $format Format.
     * @return void
     */
    public static function setJsonEncodeFormat($format): void;

    /**
     * Returns a new Time object after parsing the provided time string based on
     * the passed or configured date time format. This method is locale dependent,
     * Any string that is passed to this function will be interpreted as a locale
     * dependent string.
     *
     * When no $format is provided, the `toString` format will be used.
     *
     * If it was impossible to parse the provided time, null will be returned.
     *
     * Example:
     *
     * ```
     *  $time = Time::parseDateTime('10/13/2013 12:54am');
     *  $time = Time::parseDateTime('13 Oct, 2013 13:54', 'dd MMM, y H:mm');
     *  $time = Time::parseDateTime('10/10/2015', [IntlDateFormatter::SHORT, -1]);
     * ```
     *
     * @param string $time The time string to parse.
     * @param array<int>|string|null $format Any format accepted by IntlDateFormatter.
     * @param \DateTimeZone|string|null $tz The timezone for the instance
     * @return static|null
     * @throws \InvalidArgumentException If $format is a single int instead of array of constants
     */
    public static function parseDateTime(string $time, $format = null, $tz = null);

    /**
     * Returns a new Time object after parsing the provided $date string based on
     * the passed or configured date time format. This method is locale dependent,
     * Any string that is passed to this function will be interpreted as a locale
     * dependent string.
     *
     * When no $format is provided, the `wordFormat` format will be used.
     *
     * If it was impossible to parse the provided time, null will be returned.
     *
     * Example:
     *
     * ```
     *  $time = Time::parseDate('10/13/2013');
     *  $time = Time::parseDate('13 Oct, 2013', 'dd MMM, y');
     *  $time = Time::parseDate('13 Oct, 2013', IntlDateFormatter::SHORT);
     * ```
     *
     * @param string $date The date string to parse.
     * @param array|string|int|null $format Any format accepted by IntlDateFormatter.
     * @return static|null
     */
    public static function parseDate(string $date, $format = null);

    /**
     * Returns a new Time object after parsing the provided $time string based on
     * the passed or configured date time format. This method is locale dependent,
     * Any string that is passed to this function will be interpreted as a locale
     * dependent string.
     *
     * When no $format is provided, the IntlDateFormatter::SHORT format will be used.
     *
     * If it was impossible to parse the provided time, null will be returned.
     *
     * Example:
     *
     * ```
     *  $time = Time::parseTime('11:23pm');
     * ```
     *
     * @param string $time The time string to parse.
     * @param string|int|null $format Any format accepted by IntlDateFormatter.
     * @return static|null
     */
    public static function parseTime(string $time, $format = null);

    /**
     * Get the difference formatter instance.
     *
     * @return \Cake\Chronos\DifferenceFormatterInterface The formatter instance.
     */
    public static function getDiffFormatter(): DifferenceFormatterInterface;

    /**
     * Set the difference formatter instance.
     *
     * @param \Cake\Chronos\DifferenceFormatterInterface $formatter The formatter instance when setting.
     * @return void
     */
    public static function setDiffFormatter(DifferenceFormatterInterface $formatter): void;
}
