<?php
/**
 * Full-screen workspace for the Recast admin page.
 *
 * @package Recast\WCS
 */

namespace Recast\WCS\Admin;

use Recast\WCS\Compat\Hpos;

defined( 'ABSPATH' ) || exit;

/**
 * Decides when the Recast page hides the WordPress menu and toolbar, and keeps the
 * per-user display preferences. The chrome itself is hidden by CSS scoped to the
 * body class added here, so without JavaScript the page keeps the normal admin.
 */
final class Shell {

	const META_FULLSCREEN = 'recast_fullscreen';
	const META_THEME      = 'recast_theme';
	const THEMES          = array( 'auto', 'light', 'dark' );

	/**
	 * Hooks the page load of the Recast screen.
	 *
	 * @param string $hook Page hook suffix.
	 * @return void
	 */
	public static function register_for_hook( $hook ) {
		if ( '' === $hook ) {
			return;
		}
		add_action(
			'load-' . $hook,
			static function () {
				add_filter( 'admin_body_class', array( __CLASS__, 'body_class' ) );
			}
		);
	}

	/**
	 * Adds the Recast body classes.
	 *
	 * @param string $classes Space separated classes.
	 * @return string
	 */
	public static function body_class( $classes ) {
		$extra = array( 'recast-page', 'recast-theme-' . self::theme() );
		if ( self::is_active() ) {
			$extra[] = 'recast-fullscreen';
		}
		return trim( $classes . ' ' . implode( ' ', $extra ) );
	}

	/**
	 * Whether the full-screen workspace applies to this request.
	 *
	 * @return bool
	 */
	public static function is_active() {
		if ( is_network_admin() || self::freemius_takes_over() ) {
			return false;
		}
		return self::fullscreen();
	}

	/**
	 * Freemius shows its opt-in on the plugin's own page: never hide it.
	 *
	 * @return bool
	 */
	private static function freemius_takes_over() {
		if ( ! function_exists( 'recast_fs' ) ) {
			return false;
		}
		$fs = recast_fs();
		return $fs && method_exists( $fs, 'is_activation_mode' ) && $fs->is_activation_mode();
	}

	/**
	 * The current user's full-screen preference. Off by default: Recast opens inside the WordPress admin.
	 *
	 * @return bool
	 */
	public static function fullscreen() {
		$value = get_user_meta( get_current_user_id(), self::META_FULLSCREEN, true );
		return '1' === (string) $value;
	}

	/**
	 * The current user's colour theme: auto, light or dark.
	 *
	 * @return string
	 */
	public static function theme() {
		$value = (string) get_user_meta( get_current_user_id(), self::META_THEME, true );
		return in_array( $value, self::THEMES, true ) ? $value : 'auto';
	}

	/**
	 * Stores display preferences for the current user.
	 *
	 * @param array<string, mixed> $prefs Keys fullscreen (bool) and theme (string).
	 * @return void
	 */
	public static function save( array $prefs ) {
		$user = get_current_user_id();
		if ( array_key_exists( 'fullscreen', $prefs ) ) {
			$on = in_array( $prefs['fullscreen'], array( true, 1, '1', 'true', 'yes' ), true );
			update_user_meta( $user, self::META_FULLSCREEN, $on ? '1' : '0' );
		}
		if ( isset( $prefs['theme'] ) && in_array( $prefs['theme'], self::THEMES, true ) ) {
			update_user_meta( $user, self::META_THEME, $prefs['theme'] );
		}
	}

	/**
	 * Where the exit link goes: the admin page the user came from, else the subscriptions list.
	 *
	 * @return string
	 */
	public static function exit_url() {
		$referer = wp_get_referer();
		if ( $referer ) {
			$safe = wp_validate_redirect( $referer, '' );
			if ( $safe && 0 === strpos( $safe, admin_url() ) && false === strpos( $safe, 'page=' . Menu::SLUG ) ) {
				return $safe;
			}
		}
		if ( function_exists( 'wcs_get_subscriptions' ) ) {
			return Hpos::is_enabled()
				? admin_url( 'admin.php?page=wc-orders--shop_subscription' )
				: admin_url( 'edit.php?post_type=shop_subscription' );
		}
		return admin_url();
	}

	/**
	 * Data for the admin app.
	 *
	 * @return array<string, mixed>
	 */
	public static function for_js() {
		return array(
			'fullscreen' => self::is_active(),
			'preference' => self::fullscreen(),
			'theme'      => self::theme(),
			'exitUrl'    => self::exit_url(),
		);
	}
}