<?php
/**
 * Activation, upgrades and deactivation.
 *
 * @package SpaceBay
 */

namespace SpaceBay\Core;

use SpaceBay\Database\Schema;

defined( 'ABSPATH' ) || exit;

/**
 * Installs tables, capabilities and default settings.
 */
final class Installer {

	/**
	 * Option that stores the installed database version.
	 *
	 * @var string
	 */
	const DB_VERSION_OPTION = 'spacebay_db_version';

	/**
	 * Hooks upgrade and multisite handlers.
	 *
	 * @return void
	 */
	public static function init() {
		add_action( 'init', array( __CLASS__, 'maybe_upgrade' ), 5 );
		add_action( 'wp_initialize_site', array( __CLASS__, 'install_new_site' ), 20 );
		add_filter( 'wpmu_drop_tables', array( __CLASS__, 'drop_tables_on_site_delete' ) );
	}

	/**
	 * Runs on plugin activation.
	 *
	 * @param bool $network_wide Whether the plugin is network activated.
	 * @return void
	 */
	public static function activate( $network_wide = false ) {
		if ( is_multisite() && $network_wide ) {
			$site_ids = get_sites(
				array(
					'fields' => 'ids',
					'number' => 0,
				)
			);

			foreach ( $site_ids as $site_id ) {
				switch_to_blog( $site_id );
				self::install();
				restore_current_blog();
			}

			return;
		}

		self::install();

		// Open the SpaceBay page once, only for the person who activated it in the browser.
		if ( ! ( defined( 'WP_CLI' ) && WP_CLI ) && get_current_user_id() ) {
			update_option( 'spacebay_activation_redirect', get_current_user_id(), false );
		}
	}

	/**
	 * Runs on plugin deactivation. Data is always kept; scheduled events are removed.
	 *
	 * @return void
	 */
	public static function deactivate() {
		delete_option( 'rewrite_rules' );
		delete_option( 'spacebay_activation_redirect' );
		wp_clear_scheduled_hook( 'spacebay_daily' );
		wp_clear_scheduled_hook( 'spacebay_event_reminders' );
		wp_unschedule_hook( 'spacebay_send_notification_email' );
		wp_unschedule_hook( 'spacebay_notification_emails' );
		wp_unschedule_hook( 'spacebay_message_email' );
		wp_unschedule_hook( 'spacebay_event_notify' );
	}

	/**
	 * Installs or upgrades the current site.
	 *
	 * @return void
	 */
	public static function install() {
		Schema::create();
		Capabilities::add();

		add_option( Settings::OPTION, Settings::defaults() );
		update_option( self::DB_VERSION_OPTION, SPACEBAY_DB_VERSION );
		update_option( 'spacebay_flush_rewrite', 1 );

		if ( ! get_option( 'spacebay_installed_at' ) ) {
			update_option( 'spacebay_installed_at', time() );
		}

		/**
		 * Fires after SpaceBay is installed or upgraded on a site.
		 *
		 * @since 1.0.0
		 */
		do_action( 'spacebay_installed' );
	}

	/**
	 * Upgrades the database when the stored version is older than the code.
	 *
	 * @return void
	 */
	public static function maybe_upgrade() {
		if ( get_option( self::DB_VERSION_OPTION ) !== SPACEBAY_DB_VERSION ) {
			self::install();
		}
	}

	/**
	 * Installs SpaceBay on a new multisite site when network active.
	 *
	 * @param \WP_Site $site New site object.
	 * @return void
	 */
	public static function install_new_site( $site ) {
		if ( ! function_exists( 'is_plugin_active_for_network' ) ) {
			require_once ABSPATH . 'wp-admin/includes/plugin.php';
		}

		if ( ! is_plugin_active_for_network( plugin_basename( SPACEBAY_FILE ) ) ) {
			return;
		}

		switch_to_blog( $site->blog_id );
		self::install();
		restore_current_blog();
	}

	/**
	 * Adds SpaceBay tables to the list WordPress drops when a site is deleted.
	 *
	 * @param string[] $tables Tables WordPress will drop.
	 * @return string[]
	 */
	public static function drop_tables_on_site_delete( $tables ) {
		return array_merge( $tables, \SpaceBay\Database\Tables::all() );
	}
}