<?php
/** Native booking adapters. Availability, payment and confirmation belong to the provider. */
if ( ! defined( 'ABSPATH' ) ) { exit; }

function afroiabo_booking_connectors() {
    return array(
        'latepoint' => array( 'name' => 'LatePoint', 'shortcodes' => array( 'latepoint_book_form', 'latepoint_book_button' ) ),
        'amelia' => array( 'name' => 'Amelia', 'shortcodes' => array( 'ameliastepbooking', 'ameliacatalogbooking', 'ameliabooking', 'ameliacatalog' ) ),
        'bookly' => array( 'name' => 'Bookly', 'shortcodes' => array( 'bookly-form', 'bookly-search-form', 'bookly-services-form' ) ),
        'ssa' => array( 'name' => 'Simply Schedule Appointments', 'shortcodes' => array( 'ssa_booking' ) ),
        'booking_calendar' => array( 'name' => 'Booking Calendar', 'shortcodes' => array( 'booking', 'bookingform', 'booking_popup' ) ),
    );
}

function afroiabo_booking_provider_active( $provider ) {
    $connector = afroiabo_booking_connectors()[ $provider ] ?? null;
    if ( ! $connector ) { return false; }
    // Some providers register shortcodes only on frontend requests, not admin AJAX.
    $plugin_files = array(
        'latepoint' => 'latepoint/latepoint.php',
        'amelia' => 'ameliabooking/ameliabooking.php',
        'bookly' => 'bookly-responsive-appointment-booking-tool/main.php',
        'ssa' => 'simply-schedule-appointments/simply-schedule-appointments.php',
        'booking_calendar' => 'booking/wpdev-booking.php',
    );
    $plugin = $plugin_files[ $provider ];
    if ( in_array( $plugin, (array) get_option( 'active_plugins', array() ), true ) ||
        ( is_multisite() && array_key_exists( $plugin, (array) get_site_option( 'active_sitewide_plugins', array() ) ) ) ) {
        return true;
    }
    foreach ( $connector['shortcodes'] as $shortcode ) {
        if ( shortcode_exists( $shortcode ) ) { return true; }
    }
    return false;
}

function afroiabo_booking_provider_valid( $provider ) {
    return in_array( $provider, array( 'calendly', 'google' ), true ) || isset( afroiabo_booking_connectors()[ $provider ] );
}

/** An administrator chooses the existing public page, including builder-created forms. */
function afroiabo_booking_public_page( $url ) {
    $parts = wp_parse_url( $url );
    $home = wp_parse_url( home_url( '/' ) );
    if ( ! is_array( $parts ) || 'https' !== ( $parts['scheme'] ?? '' ) ||
        strtolower( $parts['host'] ?? '' ) !== strtolower( $home['host'] ?? '' ) ||
        ( $parts['port'] ?? 443 ) !== ( $home['port'] ?? 443 ) ||
        isset( $parts['user'] ) || isset( $parts['pass'] ) || isset( $parts['query'] ) ) {
        return '';
    }
    $post = get_post( url_to_postid( $url ) );
    if ( ! $post || ! is_post_publicly_viewable( $post ) || ! empty( $post->post_password ) ) {
        return '';
    }
    return esc_url_raw( get_permalink( $post ) );
}

function afroiabo_booking_connection( $provider, $url, $display = 'page' ) {
    if ( ! afroiabo_booking_provider_valid( $provider ) ) {
        return new WP_Error( 'booking_provider', 'Selecciona una agenda compatible.' );
    }
    $native = isset( afroiabo_booking_connectors()[ $provider ] );
    if ( $native && ! afroiabo_booking_provider_active( $provider ) ) {
        return new WP_Error( 'booking_inactive', 'Activa el plugin de citas antes de conectar su agenda.' );
    }
    $safe_url = $native ? afroiabo_booking_public_page( $url ) : afroiabo_safe_external_url( $url );
    if ( ! $safe_url ) {
        return new WP_Error( 'booking_page', $native
            ? 'Elige una página publicada de esta web, sin contraseña ni parámetros, que contenga tu formulario de reservas.'
            : 'Añade un enlace HTTPS válido para activar las reservas.' );
    }
    return array(
        'provider' => $provider,
        'url' => $safe_url,
        'display' => $native && 'embedded' === $display ? 'embedded' : 'page',
        'mode' => 'native_form',
        'conversationalBooking' => false,
    );
}

/** Read only: suggestions never activate a connector or expose unpublished pages. */
function afroiabo_booking_connector_status() {
    $connectors = afroiabo_booking_connectors();
    $pages = get_posts( array( 'post_type' => 'page', 'post_status' => 'publish', 'posts_per_page' => 250, 'orderby' => 'title', 'order' => 'ASC', 'has_password' => false ) );
    $result = array();
    foreach ( $connectors as $id => $connector ) {
        $suggestions = array();
        foreach ( $pages as $page ) {
            if ( ! is_post_publicly_viewable( $page ) || ! empty( $page->post_password ) ) { continue; }
            foreach ( $connector['shortcodes'] as $shortcode ) {
                if ( has_shortcode( $page->post_content, $shortcode ) ) {
                    $suggestions[] = array( 'title' => get_the_title( $page ), 'url' => get_permalink( $page ) );
                    break;
                }
            }
        }
        $result[] = array( 'id' => $id, 'name' => $connector['name'], 'active' => afroiabo_booking_provider_active( $id ), 'pages' => $suggestions, 'mode' => 'native_form', 'conversationalBooking' => false );
    }
    return $result;
}