<?php

declare( strict_types=1 );

namespace AcezSeo\Schema\Types;

use AcezSeo\Data\GlobalSettingsRepositoryInterface;
use AcezSeo\Schema\SchemaIds;
use AcezSeo\Schema\SchemaTypeInterface;

if ( ! defined( 'ABSPATH' ) )
{
	exit;
}

/**
 * LocalBusiness, opt-in and site-wide (like Organization) — driven entirely
 * by the "LocalBusiness" card in Global Settings, since a physical
 * address/phone/hours are a property of the business, not of any one post.
 */
final class LocalBusinessSchemaType implements SchemaTypeInterface
{
	private GlobalSettingsRepositoryInterface $settings;

	public function __construct( GlobalSettingsRepositoryInterface $settings )
	{
		$this->settings = $settings;
	}

	public function get_id(): string
	{
		return 'LocalBusiness';
	}

	public function applies_to( \WP_Post $post ): bool
	{
		$settings = $this->settings->get();

		if ( ! (bool) $settings['local_business_enabled'] )
		{
			return false;
		}

		// Scope: Google reads LocalBusiness on pages describing the business
		// (front page, contact page) — 'site' (default, backward-compatible)
		// still emits it everywhere as the site's brand identity.
		$scope = (string) ( $settings['local_business_scope'] ?? 'site' );

		if ( 'site' === $scope )
		{
			return true;
		}

		$is_front = $post->ID === (int) get_option( 'page_on_front' ) || is_front_page();

		if ( 'front_page' === $scope )
		{
			return $is_front;
		}

		return $is_front || in_array( $post->ID, array_map( 'intval', (array) ( $settings['local_business_page_ids'] ?? array() ) ), true );
	}

	public function build( \WP_Post $post ): array
	{
		$settings = $this->settings->get();

		$data = array(
			'@type' => $settings['local_business_type'],
			'@id'   => SchemaIds::local_business(),
			'name'  => '' !== $settings['organization_name'] ? $settings['organization_name'] : get_bloginfo( 'name' ),
			'url'   => home_url( '/' ),
		);

		$address = array_filter(
			array(
				'streetAddress'   => (string) $settings['local_business_street'],
				'addressLocality' => (string) $settings['local_business_locality'],
				'addressRegion'   => (string) $settings['local_business_region'],
				'postalCode'      => (string) $settings['local_business_postal'],
				'addressCountry'  => (string) $settings['local_business_country'],
			)
		);

		if ( array() !== $address )
		{
			$data['address'] = array_merge( array( '@type' => 'PostalAddress' ), $address );
		}

		if ( '' !== $settings['local_business_phone'] )
		{
			$data['telephone'] = $settings['local_business_phone'];
		}

		if ( '' !== $settings['local_business_lat'] && '' !== $settings['local_business_lng'] )
		{
			$data['geo'] = array(
				'@type'     => 'GeoCoordinates',
				'latitude'  => $settings['local_business_lat'],
				'longitude' => $settings['local_business_lng'],
			);
		}

		$hours = $this->opening_hours( (string) $settings['local_business_hours'] );

		if ( array() !== $hours )
		{
			$data['openingHoursSpecification'] = $hours;
		}

		/**
		 * Filters the LocalBusiness schema node.
		 *
		 * @param array<string, mixed> $data
		 * @param \WP_Post              $post
		 */
		return (array) apply_filters( 'acez_seo_local_business', $data, $post );
	}

	/**
	 * Parses simple lines like "Mo-Fr 09:00-17:00" or "Sa 10:00-14:00" into
	 * OpeningHoursSpecification entries. Unparseable lines are skipped rather
	 * than breaking the whole node.
	 *
	 * @return array<int, array<string, mixed>>
	 */
	private function opening_hours( string $raw ): array
	{
		$days = array(
			'mo' => 'Monday',
			'tu' => 'Tuesday',
			'we' => 'Wednesday',
			'th' => 'Thursday',
			'fr' => 'Friday',
			'sa' => 'Saturday',
			'su' => 'Sunday',
		);

		$specs = array();

		foreach ( preg_split( '/\r\n|\r|\n/', $raw ) as $line )
		{
			$line = trim( (string) $line );

			if ( '' === $line )
			{
				continue;
			}

			if ( ! preg_match( '/^([A-Za-z]{2})(?:-([A-Za-z]{2}))?\s+(\d{1,2}:\d{2})-(\d{1,2}:\d{2})$/', $line, $matches ) )
			{
				continue;
			}

			$start_key = strtolower( $matches[1] );
			$end_key   = '' !== $matches[2] ? strtolower( $matches[2] ) : $start_key;

			if ( ! isset( $days[ $start_key ], $days[ $end_key ] ) )
			{
				continue;
			}

			$day_keys      = array_keys( $days );
			$start_index   = array_search( $start_key, $day_keys, true );
			$end_index     = array_search( $end_key, $day_keys, true );
			$day_of_week   = array();

			if ( false !== $start_index && false !== $end_index && $start_index <= $end_index )
			{
				for ( $i = $start_index; $i <= $end_index; $i++ )
				{
					$day_of_week[] = 'https://schema.org/' . $days[ $day_keys[ $i ] ];
				}
			}

			if ( array() === $day_of_week )
			{
				continue;
			}

			$specs[] = array(
				'@type'     => 'OpeningHoursSpecification',
				'dayOfWeek' => $day_of_week,
				'opens'     => $matches[3],
				'closes'    => $matches[4],
			);
		}

		return $specs;
	}
}