<?php
/**
 * Chat window on the website.
 *
 * Only a small loader is added to the page. Appearance, texts, knowledge and availability come from
 * FAMMRO at runtime and update live, so changes in the console never wait for this plugin or a page
 * cache. Nothing is stored or cached here.
 *
 * @package Fammro
 */

namespace Fammro;

defined( 'ABSPATH' ) || exit;

/**
 * Frontend output.
 */
final class Frontend {

	/**
	 * Register hooks.
	 */
	public static function register(): void {
		add_action( 'wp_enqueue_scripts', array( self::class, 'enqueue' ) );
	}

	/**
	 * Add the loader when connected, switched on and not excluded on this page.
	 */
	public static function enqueue(): void {
		if ( ! self::should_load() ) {
			return;
		}
		$connection = Store::connection();
		if ( null === $connection ) {
			return;
		}

		wp_enqueue_script(
			'fammro-loader',
			FAMMRO_URL . 'assets/js/loader.js',
			array(),
			FAMMRO_VERSION,
			array(
				'in_footer' => true,
				'strategy'  => 'async',
			)
		);
		wp_add_inline_script(
			'fammro-loader',
			'window.FAMMRO_CONFIG = ' . wp_json_encode(
				array(
					'backend'      => Api::base(),
					'installation' => $connection['installation_id'],
					'apiKey'       => $connection['widget_key'],
					'consent'      => 'required',
				),
				JSON_HEX_TAG | JSON_HEX_AMP | JSON_UNESCAPED_SLASHES
			) . ';',
			'before'
		);
	}

	/**
	 * Request type and settings allow the chat window.
	 */
	public static function should_load(): bool {
		if ( is_admin() || is_feed() || is_embed() || wp_doing_ajax() || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) ) {
			return false;
		}
		$settings = Store::settings();
		if ( ! $settings['enabled'] ) {
			return false;
		}
		if ( ! empty( $settings['excluded'] ) && is_singular() ) {
			return ! in_array( (int) get_queried_object_id(), $settings['excluded'], true );
		}
		return true;
	}
}