<?php

declare(strict_types=1);

namespace FlexatechTableReservations\Blocks;

use FlexatechTableReservations\Engine\Availability;
use FlexatechTableReservations\Support\SingletonTrait;

defined( 'ABSPATH' ) || exit;

/**
 * Registers the reservation blocks (server-rendered) and their assets, in
 * the editor's Widgets category, and a shortcode for each block, for pages
 * built with the classic editor or a page builder.
 */
final class BlockRegistry {

	use SingletonTrait;

	/** [fxtr_reservation_form title="…" submit_label="…" show_details="no"] */
	public const FORM_SHORTCODE = 'fxtr_reservation_form';

	/** [fxtr_manage_reservation title="…"] */
	public const MANAGE_SHORTCODE = 'fxtr_manage_reservation';

	/** Shortcode attribute => block attribute, per shortcode. */
	private const SHORTCODES = [
		self::FORM_SHORTCODE   => [
			'block' => 'fxtr/reservation-form',
			'attrs' => [
				'title'        => 'title',
				'submit_label' => 'submitLabel',
				'show_details' => 'showDetails',
			],
		],
		self::MANAGE_SHORTCODE => [
			'block' => 'fxtr/manage-reservation',
			'attrs' => [ 'title' => 'title' ],
		],
	];

	public function register(): void {
		// Cloudflare Turnstile loader, enqueued by render.php only when the owner
		// fills in the Turnstile keys. Cloudflare serves it from its own host and
		// does not support a local copy. Listed in readme.txt, External services.
		wp_register_script( 'fxtr-turnstile', 'https://challenges.cloudflare.com/turnstile/v0/api.js', [], null, true ); // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion,WordPress.WP.EnqueuedResourceParameters.NotInFooter,PluginCheck.CodeAnalysis.EnqueuedResourceOffloading.OffloadedContent -- Cloudflare's own widget loader, versionless and only served by Cloudflare.

		wp_register_style( 'fxtr-booking', FXTR_URL . 'assets/css/booking.css', [], FXTR_VERSION );

		$this->register_reservation_blocks();
	}

	/**
	 * The table reservation form (fxtr/reservation-form) and the page the
	 * link in a reservation email opens (fxtr/manage-reservation). Both
	 * scripts lean on reservation-common.js.
	 */
	private function register_reservation_blocks(): void {
		$this->register_datepicker();
		wp_register_script( 'fxtr-reservation-common', FXTR_URL . 'assets/js/reservation-common.js', [ 'fxtr-datepicker' ], FXTR_VERSION, true );
		wp_localize_script(
			'fxtr-reservation-common',
			'fxtrReservation',
			[
				'rest'       => esc_url_raw( rest_url( 'fxtr/v1' ) ),
				'twelveHour' => 1 === preg_match( '/[aAgh]/', (string) get_option( 'time_format', 'g:i a' ) ),
				'i18n'       => [
					'sending'         => __( 'Sending…', 'flexatech-table-reservations' ),
					'error'           => __( 'Something went wrong.', 'flexatech-table-reservations' ),
					'network'         => __( 'Network error. Please try again.', 'flexatech-table-reservations' ),
					'checkFields'     => __( 'Please check the highlighted fields.', 'flexatech-table-reservations' ),
					'loading'         => __( 'Loading…', 'flexatech-table-reservations' ),
					'loadError'       => __( 'Could not load times', 'flexatech-table-reservations' ),
					'noTimes'         => __( 'No free tables that day', 'flexatech-table-reservations' ),
					'selectTime'      => __( 'Select a time', 'flexatech-table-reservations' ),
					'pickDate'        => __( 'Pick a date first', 'flexatech-table-reservations' ),
					'nameRequired'    => __( 'Please enter your name.', 'flexatech-table-reservations' ),
					'phoneRequired'   => __( 'Please enter your phone number.', 'flexatech-table-reservations' ),
					'emailRequired'   => __( 'Please enter your email address.', 'flexatech-table-reservations' ),
					'fieldRequired'   => __( 'Please fill in this field.', 'flexatech-table-reservations' ),
					'boxRequired'     => __( 'Please tick this box.', 'flexatech-table-reservations' ),
					'fewerGuests'     => __( 'Fewer guests', 'flexatech-table-reservations' ),
					'moreGuests'      => __( 'More guests', 'flexatech-table-reservations' ),
					/* translators: %d: the largest party that may book online. */
					'partyRange'      => __( 'Enter 1 to %d guests. For a larger group, please call us.', 'flexatech-table-reservations' ),
					'whenRequired'    => __( 'Please choose a date and time.', 'flexatech-table-reservations' ),
					'contactRequired' => __( 'Enter a phone number or an email so we can reach you.', 'flexatech-table-reservations' ),
					'confirmed'       => __( 'Your table is booked. We sent the details to your email.', 'flexatech-table-reservations' ),
					'pending'         => __( 'Thanks! We received your request and will confirm it shortly.', 'flexatech-table-reservations' ),
					/* translators: 1: number of guests, 2: date, 3: time. */
					'summary'         => __( 'Table for %1$s on %2$s at %3$s', 'flexatech-table-reservations' ),
					'statusPending'   => __( 'Waiting for the restaurant to confirm. You can still change or cancel it below.', 'flexatech-table-reservations' ),
					'statusOpen'      => __( 'Confirmed. You can still change or cancel it below.', 'flexatech-table-reservations' ),
					'isCancelled'     => __( 'This reservation is cancelled.', 'flexatech-table-reservations' ),
					'isClosed'        => __( 'This reservation can no longer be changed online. Please call us.', 'flexatech-table-reservations' ),
					'moved'           => __( 'Your reservation is changed.', 'flexatech-table-reservations' ),
					'cancelled'       => __( 'Your reservation is cancelled.', 'flexatech-table-reservations' ),
					'confirmCancel'   => __( 'Cancel this reservation? This cannot be undone.', 'flexatech-table-reservations' ),
					'noTimesDay'      => __( 'No free tables on this day. Try another date below.', 'flexatech-table-reservations' ),
					'noTimesShift'    => __( 'No free times in this part of the day. Try All times.', 'flexatech-table-reservations' ),
					'noOtherDays'     => __( 'No free tables in the next few weeks.', 'flexatech-table-reservations' ),
					/* translators: %d: number of other free times that day. */
					'moreTimes'       => __( '+%d more', 'flexatech-table-reservations' ),
					'holding'         => __( 'Holding your table…', 'flexatech-table-reservations' ),
					'holdGone'        => __( 'Your table was released because time ran out. Pick a time again.', 'flexatech-table-reservations' ),
					/* translators: %d: number of guests. */
					'partyOf'         => __( 'Party of %d', 'flexatech-table-reservations' ),
					'titleConfirmed'  => __( 'Your table is booked', 'flexatech-table-reservations' ),
					'titlePending'    => __( 'Request received', 'flexatech-table-reservations' ),
					/* translators: %s: the guest's name from their Google account. */
					'signedAs'        => __( 'Signed in as %s. Check your details below.', 'flexatech-table-reservations' ),
				],
			]
		);
		wp_register_script( 'fxtr-reservation-form', FXTR_URL . 'assets/js/reservation-form.js', [ 'fxtr-reservation-common' ], FXTR_VERSION, true );
		// Google's sign-in button, enqueued by the form only when the owner turned it on.
		$async = [
			'in_footer' => true,
			'strategy'  => 'async',
		];
		wp_register_script( 'fxtr-google-signin', 'https://accounts.google.com/gsi/client', [], null, $async ); // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion -- third-party loader, versionless by design.
		wp_register_script( 'fxtr-reservation-manage', FXTR_URL . 'assets/js/reservation-manage.js', [ 'fxtr-reservation-common' ], FXTR_VERSION, true );

		wp_register_script(
			'fxtr-reservation-blocks',
			FXTR_URL . 'assets/js/reservation-blocks.js',
			[ 'wp-blocks', 'wp-element', 'wp-block-editor', 'wp-components', 'wp-server-side-render', 'wp-i18n' ],
			FXTR_VERSION,
			true
		);
		wp_set_script_translations( 'fxtr-reservation-blocks', 'flexatech-table-reservations', FXTR_PATH . 'languages' );

		register_block_type( FXTR_PATH . 'app/Blocks/reservation-form' );
		register_block_type( FXTR_PATH . 'app/Blocks/manage-reservation' );

		foreach ( array_keys( self::SHORTCODES ) as $tag ) {
			add_shortcode( $tag, static fn( mixed $atts ): string => self::shortcode( $tag, (array) $atts ) );
		}
	}

	/**
	 * Renders a shortcode as its block, so both print the same markup and
	 * WordPress loads the block's script and style the same way.
	 *
	 * @param array<int|string,mixed> $atts
	 */
	private static function shortcode( string $tag, array $atts ): string {
		$map   = self::SHORTCODES[ $tag ];
		$attrs = [];
		foreach ( $map['attrs'] as $name => $attr ) {
			if ( isset( $atts[ $name ] ) && is_scalar( $atts[ $name ] ) ) {
				$attrs[ $attr ] = sanitize_text_field( (string) $atts[ $name ] );
			}
		}

		return render_block(
			[
				'blockName'    => $map['block'],
				'attrs'        => $attrs,
				'innerBlocks'  => [],
				'innerHTML'    => '',
				'innerContent' => [],
			]
		);
	}

	/**
	 * A published page that shows a block, through the block or its
	 * shortcode, or 0.
	 */
	public static function page_with( string $block ): int {
		$needles = [ '<!-- wp:' . $block ];
		foreach ( self::SHORTCODES as $tag => $shortcode ) {
			if ( $shortcode['block'] === $block ) {
				$needles[] = '[' . $tag;
			}
		}

		foreach ( $needles as $needle ) {
			$found = get_posts(
				[
					'post_type'   => 'page',
					'post_status' => 'publish',
					's'           => $needle,
					'numberposts' => 1,
					'fields'      => 'ids',
				]
			);
			if ( isset( $found[0] ) ) {
				return (int) $found[0];
			}
		}

		return 0;
	}

	/**
	 * The calendar that replaces native date and datetime inputs marked with
	 * data-fxtr-date or data-fxtr-datetime (same UI as Flexa Extra's).
	 */
	private function register_datepicker(): void {
		wp_register_script( 'fxtr-datepicker', FXTR_URL . 'assets/js/datepicker.js', [], FXTR_VERSION, true );
		wp_localize_script(
			'fxtr-datepicker',
			'fxtrDatePickerConfig',
			[
				// Intl wants a BCP-47 tag (vi-VN); WordPress stores vi_VN.
				'locale'     => str_replace( '_', '-', determine_locale() ),
				'weekStart'  => (int) get_option( 'start_of_week', 0 ),
				'dateFormat' => self::date_format(),
				'timeFormat' => self::time_format(),
				'i18n'       => [
					'chooseDate'     => __( 'Choose date', 'flexatech-table-reservations' ),
					'chooseDateTime' => __( 'Choose date and time', 'flexatech-table-reservations' ),
					'clearDate'      => __( 'Clear', 'flexatech-table-reservations' ),
					'doneDate'       => __( 'Done', 'flexatech-table-reservations' ),
					'hour'           => __( 'Hour', 'flexatech-table-reservations' ),
					'minute'         => __( 'Minute', 'flexatech-table-reservations' ),
					'previousMonth'  => __( 'Previous month', 'flexatech-table-reservations' ),
					'nextMonth'      => __( 'Next month', 'flexatech-table-reservations' ),
				],
			]
		);
	}

	/**
	 * Attributes that grey out, on a date input's calendar, the days with
	 * no table to book: weekdays no shift runs on, and closed dates. The
	 * server still checks every booking; a cached page may lag behind.
	 */
	public static function closed_day_attributes(): string {
		$closed = Availability::closed_days();

		return sprintf(
			' data-disabled-weekdays="%1$s" data-disabled-dates="%2$s"',
			esc_attr( implode( ',', $closed['weekdays'] ) ),
			esc_attr( implode( ',', $closed['dates'] ) )
		);
	}

	/** The site's date format (Settings, General), for the calendar's label. */
	public static function date_format(): string {
		$format = (string) get_option( 'date_format', 'F j, Y' );
		return '' !== $format ? $format : 'F j, Y';
	}

	/** The site's time format, for a datetime calendar's label and hour list. */
	public static function time_format(): string {
		$format = (string) get_option( 'time_format', 'g:i a' );
		return '' !== $format ? $format : 'g:i a';
	}
}