<?php
declare(strict_types=1);

namespace Unsupervised\Schedular;

use Unsupervised\Schedular\Auth\RoleManager;
use Unsupervised\Schedular\Availability\AvailabilityRepository;
use Unsupervised\Schedular\Payment\CreditRepository;
use Unsupervised\Schedular\Payment\PaymentRepository;
use Unsupervised\Schedular\Payment\ScheduledBillingRunner;
use Unsupervised\Schedular\Policy\AcceptanceRepository;

class Installer {

	public function run(): void {
		$this->createTables();
		$this->migrateData();
		( new RoleManager() )->createRoles();
		$this->scheduleBilling();
		flush_rewrite_rules();
		update_option( 'us_schedular_version', USC_VERSION );
	}

	/**
	 * Ensure the daily scheduled-billing scan is registered with WP-Cron. Runs on
	 * activation and on every version-bump re-install, so an existing site that
	 * predates the feature picks the event up on its next deploy.
	 */
	private function scheduleBilling(): void {
		if ( false === wp_next_scheduled( ScheduledBillingRunner::HOOK ) ) {
			wp_schedule_event( time(), 'daily', ScheduledBillingRunner::HOOK );
		}
	}

	private function createTables(): void {
		global $wpdb;
		if ( ! $wpdb instanceof \wpdb ) {
			return;
		}
		$charset = $wpdb->get_charset_collate();

		require_once ABSPATH . 'wp-admin/includes/upgrade.php';

		foreach ( Schema::tables( $wpdb->prefix, $charset ) as $sql ) {
			dbDelta( $sql );
		}
	}

	private function migrateData(): void {
		global $wpdb;
		if ( ! $wpdb instanceof \wpdb ) {
			return;
		}

		( new AvailabilityRepository( $wpdb ) )->splitOversizedWindows();

		// Guardian accounts introduced "who pays" / "who agreed" alongside "who the
		// student is". Every row written before then had them one and the same, so
		// point the new columns at the student rather than leaving them 0 — the
		// balance and acceptance lookups key on them directly.
		( new PaymentRepository( $wpdb ) )->backfillPayerIds();
		( new CreditRepository( $wpdb ) )->backfillPayerIds();
		( new AcceptanceRepository( $wpdb ) )->backfillAcceptedBy();
	}
}