<?php
/**
 * Activation, schema and scheduling.
 *
 * @package Maintained_Log
 */

namespace Maintained_Log;

defined( 'ABSPATH' ) || exit;

/**
 * Creates the log table and schedules cron jobs.
 */
class Installer {

	const DB_VERSION        = '1';
	const DB_VERSION_OPTION = 'maintained_log_db_version';

	/**
	 * Activation hook.
	 */
	public static function activate() {
		self::create_tables();
		update_option( self::DB_VERSION_OPTION, self::DB_VERSION, false );

		Settings::ensure_defaults();
		// Whoever activates the plugin maintains the site until chosen otherwise.
		if ( ! Settings::maintainers() && get_current_user_id() ) {
			Settings::update( array( 'maintainers' => array( get_current_user_id() ) ) );
		}
		set_transient( Admin\Onboarding::REDIRECT, 1, MINUTE_IN_SECONDS );
		Environment::remember_production_url_if_unset();

		self::ensure_schedule();

		// The first snapshot is the baseline: later snapshots are diffed against it.
		if ( ! Inventory::get_stored() ) {
			$baseline = Inventory::capture();
			// WordPress marks the plugin active only after this hook runs.
			$self = plugin_basename( MAINTAINED_LOG_FILE );
			if ( isset( $baseline['plugins'][ $self ] ) ) {
				$baseline['plugins'][ $self ]['active'] = true;
			}
			Inventory::store( $baseline );
			Log::add(
				array(
					'type'   => Log::TYPE_SYSTEM,
					'title'  => __( 'Maintained.log activated: baseline inventory recorded', 'maintained-log' ),
					'source' => Log::SOURCE_SYSTEM,
				)
			);
		}
	}

	/**
	 * Deactivation hook. Data is kept; see uninstall.php.
	 */
	public static function deactivate() {
		wp_clear_scheduled_hook( Plugin::CRON_HOOK );
		wp_clear_scheduled_hook( Plugin::POST_UPDATE_HOOK );
		wp_clear_scheduled_hook( Performance::TICK_HOOK );
		wp_clear_scheduled_hook( Vulnerabilities::TICK_HOOK );
	}

	/**
	 * Schedules the twice-daily job if it is missing: it is created on
	 * activation, but files copied over FTP, migrations or cron cleanup
	 * tools can leave the plugin active without it.
	 */
	public static function ensure_schedule() {
		if ( ! wp_next_scheduled( Plugin::CRON_HOOK ) ) {
			wp_schedule_event( time() + HOUR_IN_SECONDS, 'twicedaily', Plugin::CRON_HOOK );
		}
	}

	/**
	 * Upgrades the schema when the plugin is updated without reactivation.
	 */
	public static function maybe_upgrade() {
		if ( get_option( self::DB_VERSION_OPTION ) !== self::DB_VERSION ) {
			self::create_tables();
			update_option( self::DB_VERSION_OPTION, self::DB_VERSION, false );
		}
	}

	/**
	 * Creates or updates the log table with dbDelta.
	 */
	private static function create_tables() {
		global $wpdb;

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

		$table   = Log::table();
		$charset = $wpdb->get_charset_collate();

		dbDelta(
			"CREATE TABLE {$table} (
				id bigint(20) unsigned NOT NULL AUTO_INCREMENT,
				created_at datetime NOT NULL,
				type varchar(20) NOT NULL,
				category varchar(40) NOT NULL DEFAULT '',
				status varchar(20) NOT NULL DEFAULT 'info',
				title text NOT NULL,
				details longtext NULL,
				user_id bigint(20) unsigned NOT NULL DEFAULT 0,
				source varchar(20) NOT NULL DEFAULT '',
				minutes int(10) unsigned NOT NULL DEFAULT 0,
				amends_id bigint(20) unsigned NOT NULL DEFAULT 0,
				hash char(64) NOT NULL DEFAULT '',
				PRIMARY KEY  (id),
				KEY created_at (created_at),
				KEY type (type)
			) {$charset};"
		);
	}
}