<?php
/**
 * Add-to-calendar deep links.
 *
 * @package Bookline
 */

declare( strict_types=1 );

namespace Bookline\Domain\Notification;

use DateTimeImmutable;
use DateTimeZone;

/**
 * Builds Google / Outlook / Office 365 / Yahoo / Apple calendar URLs.
 *
 * @since 0.1.0
 */
final class CalendarLinks {

	/**
	 * Build provider links.
	 *
	 * @param string            $title       Title.
	 * @param string            $details     Details.
	 * @param DateTimeImmutable $start_utc   Start.
	 * @param DateTimeImmutable $end_utc     End.
	 * @param string|null       $location    Location.
	 * @param string|null       $ics_data_uri Optional data URI for Apple.
	 *
	 * @return array{google: string, outlook: string, office365: string, yahoo: string, apple: string}
	 *
	 * @since 0.1.0
	 */
	public function build(
		string $title,
		string $details,
		DateTimeImmutable $start_utc,
		DateTimeImmutable $end_utc,
		?string $location = null,
		?string $ics_data_uri = null,
	): array {
		$utc    = new DateTimeZone( 'UTC' );
		$start  = $start_utc->setTimezone( $utc )->format( 'Ymd\THis\Z' );
		$end    = $end_utc->setTimezone( $utc )->format( 'Ymd\THis\Z' );
		$loc    = $location ?? '';
		$dates  = $start . '/' . $end;

		$google = 'https://calendar.google.com/calendar/render?action=TEMPLATE'
			. '&text=' . rawurlencode( $title )
			. '&dates=' . rawurlencode( $dates )
			. '&details=' . rawurlencode( $details )
			. '&location=' . rawurlencode( $loc );

		$outlook = 'https://outlook.live.com/calendar/0/deeplink/compose?path=/calendar/action/compose&rru=addevent'
			. '&subject=' . rawurlencode( $title )
			. '&body=' . rawurlencode( $details )
			. '&startdt=' . rawurlencode( $start_utc->setTimezone( $utc )->format( 'Y-m-d\TH:i:s\Z' ) )
			. '&enddt=' . rawurlencode( $end_utc->setTimezone( $utc )->format( 'Y-m-d\TH:i:s\Z' ) )
			. '&location=' . rawurlencode( $loc );

		$office = 'https://outlook.office.com/calendar/0/deeplink/compose?path=/calendar/action/compose&rru=addevent'
			. '&subject=' . rawurlencode( $title )
			. '&body=' . rawurlencode( $details )
			. '&startdt=' . rawurlencode( $start_utc->setTimezone( $utc )->format( 'Y-m-d\TH:i:s\Z' ) )
			. '&enddt=' . rawurlencode( $end_utc->setTimezone( $utc )->format( 'Y-m-d\TH:i:s\Z' ) )
			. '&location=' . rawurlencode( $loc );

		$yahoo = 'https://calendar.yahoo.com/?v=60&view=d&type=20'
			. '&title=' . rawurlencode( $title )
			. '&st=' . rawurlencode( $start )
			. '&et=' . rawurlencode( $end )
			. '&desc=' . rawurlencode( $details )
			. '&in_loc=' . rawurlencode( $loc );

		return [
			'google'    => $google,
			'outlook'   => $outlook,
			'office365' => $office,
			'yahoo'     => $yahoo,
			'apple'     => $ics_data_uri ?? '#',
		];
	}
}