<?php
/**
 * Activation.
 *
 * @package WPAB
 */

namespace WPAB;

use WPAB\Database\Migrator;
use WPAB\Support\Filesystem;
use WPAB\Support\Settings;

/**
 * Creates tables, the capability, and the must-use runtime loader.
 */
final class Activator {
	/**
	 * Activate the plugin for the current site.
	 */
	public static function activate(): void {
		( new Migrator() )->maybe_upgrade();
		if ( false === get_option( Settings::OPTION, false ) ) {
			add_option( Settings::OPTION, Settings::defaults(), '', false );
		}

		$role = get_role( 'administrator' );
		if ( $role instanceof \WP_Role ) {
			$role->add_cap( Settings::capability() );
		}

		self::install_loader();

		if ( ! wp_next_scheduled( 'wpab_cron_tick' ) ) {
			wp_schedule_event( time() + 60, 'hourly', 'wpab_cron_tick' );
		}
	}

	/**
	 * Copy the must-use loader into mu-plugins.
	 */
	public static function install_loader(): void {
		$source = WPAB_PATH . 'mu-loader/wpab-runtime-loader.php';
		if ( ! is_readable( $source ) ) {
			return;
		}
		if ( ! is_dir( WPMU_PLUGIN_DIR ) ) {
			wp_mkdir_p( WPMU_PLUGIN_DIR );
		}
		if ( ! self::install_root_map() ) {
			return;
		}

		$target = trailingslashit( WPMU_PLUGIN_DIR ) . 'wpab-runtime-loader.php';
		if ( is_readable( $target ) && hash_file( 'sha256', $source ) === hash_file( 'sha256', $target ) ) {
			return;
		}
		if ( ! copy( $source, $target ) ) {
			\WPAB\Support\Logger::write( 'Unable to install the must-use runtime loader.' );
		}
	}

	/**
	 * Remember this plugin's real path. The must-use loader lives outside the plugin directory.
	 *
	 * @return bool
	 */
	private static function install_root_map(): bool {
		$root   = trailingslashit( wp_normalize_path( WPAB_PATH ) );
		$file   = wp_normalize_path( WPAB_FILE );
		$quote  = static function ( string $value ): string {
			return "'" . str_replace( array( '\\', "'" ), array( '\\\\', "\\'" ), $value ) . "'";
		};
		$body   = "<?php\n/**\n * Generated by JM Split Tester from plugin_dir_path(). Do not edit.\n *\n * @package WPAB\n */\n\nif ( ! defined( 'ABSPATH' ) ) {\n\texit;\n}\n\nif ( ! defined( 'WPAB_PLUGIN_ROOT' ) ) {\n\tdefine( 'WPAB_PLUGIN_ROOT', " . $quote( $root ) . " );\n}\nif ( ! defined( 'WPAB_PLUGIN_FILE' ) ) {\n\tdefine( 'WPAB_PLUGIN_FILE', " . $quote( $file ) . " );\n}\n";
		$target = trailingslashit( WPMU_PLUGIN_DIR ) . 'wpab-plugin-root.php';
		if ( is_readable( $target ) && hash_equals( $body, (string) \WPAB\Support\Local_File::read( $target ) ) ) {
			return true;
		}
		if ( ! Filesystem::put( $target, $body ) ) {
			\WPAB\Support\Logger::write( 'Unable to record the plugin directory for the must-use loader.' );
			return false;
		}
		return true;
	}
}