<?php
/**
 * Settings store. Every default is chosen so a fresh install already does the right thing.
 */

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

class SXSEO_Settings {

	const OPTION = 'sxseo_settings';

	private static $cache = null;

	public static function defaults() {
		return array(
			// Titles ------------------------------------------------------------------------------
			'sep'              => '–',
			'title_home'       => '%sitename% %sep% %tagline%',
			'title_post'       => '%title% %sep% %sitename%',
			'title_page'       => '%title% %sep% %sitename%',
			'title_term'       => '%term% %sep% %sitename%',
			'title_author'     => '%author% %sep% %sitename%',
			'title_archive'    => '%archive% %sep% %sitename%',
			'title_search'     => 'Search results for "%searchphrase%" %sep% %sitename%',
			'title_404'        => 'Page not found %sep% %sitename%',
			'home_description' => '',
			'description_len'  => 155,

			// Legacy + extra meta ----------------------------------------------------------------
			'meta_keywords'    => 1,
			'meta_author'      => 1,
			'meta_language'    => 1,
			'meta_copyright'   => 1,
			'meta_legacy'      => 1,   // revisit-after, rating, distribution, resource-type, format-detection
			'dublin_core'      => 1,
			'geo_meta'         => 1,
			'hreflang'         => 1,
			'cleanup_head'     => 1,   // generator, RSD, wlwmanifest, shortlink

			// Social ------------------------------------------------------------------------------
			'og'               => 1,
			'twitter_card'     => 'summary_large_image',
			'twitter_site'     => '',
			'fb_app_id'        => '',
			'default_image'    => '',

			// Robots / indexing ------------------------------------------------------------------
			'noindex_search'   => 1,
			'noindex_date'     => 1,
			'noindex_author'   => 'auto',   // auto = only when the site has one author
			'attachment_redirect' => 1,
			'robots_max'       => 1,        // max-image-preview:large, max-snippet:-1, max-video-preview:-1
			'feeds_noindex'    => 1,
			'robots_txt_extras'=> 1,
			'ai_policy'        => 'allow',  // allow | block_training

			// Business / schema ------------------------------------------------------------------
			'org_type'         => 'Organization',
			'org_name'         => '',
			'org_legal_name'   => '',
			'org_description'  => '',
			'org_knows_about'  => '',       // topics, comma separated
			'org_services'     => '',       // one service per line
			'org_logo'         => '',
			'org_phone'        => '',
			'org_email'        => '',
			'org_street'       => '',
			'org_city'         => '',
			'org_region'       => '',
			'org_postcode'     => '',
			'org_country'      => 'GB',
			'org_lat'          => '',
			'org_lng'          => '',
			'org_price_range'  => '',
			'org_hours'        => '',       // one per line, e.g. "Mo-Fr 09:00-17:30"
			'org_area'         => '',       // areas served, comma separated
			'org_profiles'     => '',       // social profile URLs, one per line
			'article_type'     => 'BlogPosting',
			'breadcrumb_sep'   => '›',

			// Verification -------------------------------------------------------------------------
			'v_google'         => '',
			'v_bing'           => '',
			'v_yandex'         => '',
			'v_baidu'          => '',
			'v_pinterest'      => '',
			'v_facebook'       => '',

			// Sitemap / discovery ------------------------------------------------------------------
			'sitemap'          => 1,
			'sitemap_images'   => 1,
			'sitemap_exclude_types' => array(),
			'indexnow'         => SXSEO_Edition::is_pro() ? 1 : 0,   // opt-in: sends each published URL to api.indexnow.org (see readme "External services")
			'indexnow_key'     => '',
			'llms_txt'         => 1,

			// Redirects / 404 ------------------------------------------------------------------------
			'auto_redirects'   => 1,
			'smart_404'        => 1,
			'log_404'          => 1,

			// Content ---------------------------------------------------------------------------------
			'auto_alt'         => 1,

			// Updates ---------------------------------------------------------------------------------
			'auto_update'      => 1,
		);
	}

	public static function hook() {
		add_action( 'update_option_' . self::OPTION, array( __CLASS__, 'flush_cache' ) );
	}

	public static function flush_cache() {
		self::$cache = null;
	}

	public static function all() {
		if ( null === self::$cache ) {
			$saved       = get_option( self::OPTION, array() );
			self::$cache = array_merge( self::defaults(), is_array( $saved ) ? $saved : array() );
		}
		return self::$cache;
	}

	public static function get( $key, $default = null ) {
		$all = self::all();
		return array_key_exists( $key, $all ) ? $all[ $key ] : $default;
	}

	public static function ensure_defaults() {
		$saved = get_option( self::OPTION, null );
		if ( ! is_array( $saved ) ) {
			// Seed the business name and logo from what the site already knows.
			$seed = array( 'org_name' => get_bloginfo( 'name' ) );
			$logo = get_theme_mod( 'custom_logo' );
			if ( $logo ) {
				$url = wp_get_attachment_image_url( $logo, 'full' );
				if ( $url ) {
					$seed['org_logo'] = $url;
				}
			}
			add_option( self::OPTION, $seed, '', 'yes' );
		}
		if ( '' === (string) self::get( 'indexnow_key' ) ) {
			$all                 = get_option( self::OPTION, array() );
			$all['indexnow_key'] = wp_generate_password( 32, false, false );
			update_option( self::OPTION, $all );
		}
		self::flush_cache();
	}

	public static function save( array $in ) {
		$def = self::defaults();
		$cur = self::all();
		$out = $cur;
		foreach ( $def as $k => $d ) {
			if ( ! array_key_exists( $k, $in ) ) {
				// Unticked checkboxes are absent from a form post; only reset flags that were on the submitted tab.
				continue;
			}
			$v = $in[ $k ];
			if ( is_array( $d ) ) {
				$out[ $k ] = array_values( array_filter( array_map( 'sanitize_key', (array) $v ) ) );
			} elseif ( in_array( $k, array( 'org_hours', 'org_profiles', 'org_services' ), true ) ) {
				$out[ $k ] = implode( "\n", array_filter( array_map( 'trim', preg_split( '/\r\n|\r|\n/', (string) $v ) ) ) );
			} elseif ( in_array( $k, array( 'default_image', 'org_logo' ), true ) ) {
				$out[ $k ] = esc_url_raw( (string) $v );
			} elseif ( is_int( $d ) && ! in_array( $k, array( 'description_len' ), true ) ) {
				$out[ $k ] = $v ? 1 : 0;
			} elseif ( 'description_len' === $k ) {
				$out[ $k ] = max( 100, min( 320, (int) $v ) );
			} else {
				$out[ $k ] = sanitize_text_field( (string) $v );
			}
		}
		update_option( self::OPTION, $out );
		self::flush_cache();
		SXSEO_Sitemap::purge();
	}
}