<?php
/**
 * Switches on the built-in integrations whose plugins are active.
 *
 * @package Smsportal
 */

namespace Smsportal\Integrations;

defined( 'ABSPATH' ) || exit;

/**
 * Each integration adds its events (and hooks into its plugin) only when that plugin is active, so a site
 * without e.g. Amelia sees no Amelia events and runs none of our Amelia code.
 */
class Loader {

	/**
	 * Integrations by the slug of the plugin they need.
	 */
	const INTEGRATIONS = array(
		'woocommerce'       => WooCommerce::class,
		'contact-form-7'    => ContactForm7::class,
		'wpforms-lite'      => WPForms::class,
		'fluentform'        => FluentForms::class,
		'forminator'        => Forminator::class,
		'kadence-blocks'    => KadenceBlocks::class,
		'ninja-forms'       => NinjaForms::class,
		'ameliabooking'     => Booking::class,
		'fluent-booking'    => FluentBooking::class,
		'booking'           => BookingCalendar::class,
		'uncanny-automator' => Automator::class,
		'ultimate-member'   => UltimateMember::class,
	);

	/**
	 * Logos of the integrations' plugins (smsportal/assets/integrations/), for the rule editor's plugin tiles.
	 */
	const ICONS = array(
		'woocommerce'     => 'woocommerce.png',
		'contact-form-7'  => 'contact-form-7.png',
		'wpforms-lite'    => 'wpforms.png',
		'fluentform'      => 'fluent-forms.png',
		'forminator'      => 'forminator.png',
		'kadence-blocks'  => 'kadence-blocks.png',
		'ninja-forms'     => 'ninja-forms.png',
		'ameliabooking'   => 'amelia.png',
		'fluent-booking'  => 'fluent-booking.png',
		'booking'         => 'wp-booking-calendar.png',
		'ultimate-member' => 'ultimate-member.png',
	);

	/**
	 * Plugin tiles of the active integrations that offer events (Uncanny Automator only adds an action),
	 * also when they have no events yet (e.g. no form created).
	 *
	 * @return array<int,array{name:string,icon:string}>
	 */
	public static function event_groups(): array {
		$groups = array();
		foreach ( self::active() as $slug ) {
			$class = self::INTEGRATIONS[ $slug ];
			if ( ! defined( $class . '::GROUP' ) || ! isset( self::ICONS[ $slug ] ) ) {
				continue;
			}
			$groups[] = array(
				'name' => (string) constant( $class . '::GROUP' ),
				'icon' => SMSPORTAL_URL_BASE . 'assets/integrations/' . self::ICONS[ $slug ],
			);
		}
		return $groups;
	}

	/**
	 * Register hooks.
	 *
	 * @return void
	 */
	public static function register(): void {
		// After every plugin is loaded, so the checks below see them.
		add_action( 'plugins_loaded', array( self::class, 'boot' ), 20 );
	}

	/**
	 * Switch on the active integrations.
	 *
	 * @return array<int,string> Slugs of the integrations switched on.
	 */
	public static function boot(): array {
		$active = self::active();
		foreach ( $active as $slug ) {
			call_user_func( array( self::INTEGRATIONS[ $slug ], 'register' ) );
		}
		return $active;
	}

	/**
	 * Integrations whose plugin is active.
	 *
	 * @return array<int,string> Plugin slugs.
	 */
	public static function active(): array {
		$active = array();
		foreach ( self::INTEGRATIONS as $slug => $integration ) {
			/**
			 * Filters whether a built-in integration is on. Default: whether its plugin is active.
			 *
			 * @param bool   $active Whether the plugin is active.
			 * @param string $slug   Plugin slug: woocommerce, contact-form-7, wpforms-lite, fluentform, forminator, kadence-blocks, ninja-forms, ameliabooking, fluent-booking, booking (WP Booking Calendar), uncanny-automator, ultimate-member.
			 */
			if ( apply_filters( 'smsportal_integration_active', call_user_func( array( $integration, 'available' ) ), $slug ) ) {
				$active[] = $slug;
			}
		}
		return $active;
	}
}