<?php
if ( ! defined( 'ABSPATH' ) ) { exit; }

class Aegistha_Alerts {

	public static function init() {
		$s = Aegistha_Settings::get();
		if ( empty( $s['alerts_enabled'] ) ) {
			return;
		}
		add_action( 'wp_login', array( __CLASS__, 'on_login' ), 10, 2 );
		add_action( 'set_user_role', array( __CLASS__, 'on_role' ), 10, 2 );
		add_action( 'activated_plugin', array( __CLASS__, 'on_plugin' ), 10, 1 );
		add_action( 'switch_theme', array( __CLASS__, 'on_theme' ), 10, 1 );
	}

	private static function notify( $subject, $body ) {
		$to   = get_option( 'admin_email' );
		$name = wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES );
		wp_mail( $to, '[' . $name . '] ' . $subject, $body );
	}

	public static function on_login( $user_login, $user ) {
		if ( ! ( $user instanceof WP_User ) || ! in_array( 'administrator', (array) $user->roles, true ) ) {
			return;
		}
		self::notify(
			__( 'An administrator just signed in', 'aegistha' ),
			sprintf(
				/* translators: %s: username */
				__( 'The administrator account "%s" just signed in to your site. If this was you, no action is needed.', 'aegistha' ),
				$user_login
			)
		);
	}

	public static function on_role( $user_id, $role ) {
		if ( 'administrator' !== $role ) {
			return;
		}
		$user = get_userdata( $user_id );
		self::notify(
			__( 'A new administrator was added', 'aegistha' ),
			sprintf(
				/* translators: %s: username */
				__( 'The account "%s" was just given administrator access. If you did not do this, review your users immediately.', 'aegistha' ),
				$user ? $user->user_login : (string) $user_id
			)
		);
	}

	public static function on_plugin( $plugin ) {
		self::notify(
			__( 'A plugin was activated', 'aegistha' ),
			sprintf(
				/* translators: %s: plugin file */
				__( 'The plugin "%s" was just activated on your site.', 'aegistha' ),
				$plugin
			)
		);
	}

	public static function on_theme( $new_name ) {
		self::notify(
			__( 'Your theme was changed', 'aegistha' ),
			sprintf(
				/* translators: %s: theme name */
				__( 'Your active theme was just changed to "%s".', 'aegistha' ),
				$new_name
			)
		);
	}
}