<?php
/**
 * Loads the AI Advisor panel on the Client Monitor and report screens.
 *
 * @package TurtleReport
 */

namespace TurtleReport\Admin;

use TurtleReport\Access\AccessPolicy;
use TurtleReport\Advisor\Advisor;

defined( 'ABSPATH' ) || exit;

/**
 * Adds the "Ask AI" panel only when the AI Advisor is switched on with a key,
 * only for people who manage TurtleReport, and only on the Client Monitor
 * and Reports screens. Otherwise nothing is loaded.
 */
final class AdvisorAssets {

	/**
	 * Returns the Advisor.
	 *
	 * @var callable
	 */
	private $advisor;

	/**
	 * Access.
	 *
	 * @var AccessPolicy
	 */
	private $access;

	/**
	 * Constructor.
	 *
	 * @param callable     $advisor Returns the Advisor.
	 * @param AccessPolicy $access  Access.
	 */
	public function __construct( callable $advisor, AccessPolicy $access ) {
		$this->advisor = $advisor;
		$this->access  = $access;
	}

	/**
	 * Hooks into WordPress.
	 *
	 * @return void
	 */
	public function register() {
		add_action( 'admin_enqueue_scripts', array( $this, 'enqueue' ), 20 );
	}

	/**
	 * Enqueues the panel.
	 *
	 * @return void
	 */
	public function enqueue() {
		// phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Only picks which screen this is.
		$page = isset( $_GET['page'] ) ? sanitize_key( wp_unslash( $_GET['page'] ) ) : '';
		if ( ! in_array( $page, array( OverviewPage::SLUG, ReportsPage::SLUG ), true ) ) {
			return;
		}
		$advisor = call_user_func( $this->advisor );
		$user    = get_current_user_id();
		if ( ! $advisor instanceof Advisor || ! $advisor->can_use( $user ) ) {
			return;
		}
		$sites = array();
		foreach ( $this->access->visible_sites( $user ) as $site ) {
			$sites[] = array(
				'id'   => $site->id,
				'name' => $site->display_name(),
			);
		}
		if ( ! $sites ) {
			return;
		}
		wp_enqueue_style( 'turtlereport-advisor', TURTLEREPORT_URL . 'assets/css/advisor.css', array( 'turtlereport-shell' ), AdminPage::asset_version( 'assets/css/advisor.css' ) );

		$provider = $advisor->provider();
		$boot     = array(
			'sites'    => $sites,
			'screen'   => OverviewPage::SLUG === $page ? 'monitor' : 'report',
			'provider' => $provider ? $provider->label() : '',
			'usage'    => $advisor->usage_summary(),
			'settings' => current_user_can( 'manage_options' ) ? SettingsPage::url() . '#tly-ai' : '',
		);
		$js       = 'window.turtlereportAdvisor = ' . wp_json_encode( $boot ) . ';';
		// Before the screen's own script, so the issue panel knows to show "Ask AI".
		foreach ( array( 'turtlereport-overview', 'turtlereport-reports' ) as $handle ) {
			if ( wp_script_is( $handle, 'enqueued' ) ) {
				wp_add_inline_script( $handle, $js, 'before' );
				return;
			}
		}
	}
}