<?php
/**
 * AZA Phase 1f – Woo Subscription Perioden → Hetzner (OHNE Woo /wc/v3/subscriptions REST)
 *
 * Nicht automatisch aktivieren: Inhalt z. B. per „Code Snippets“ einbinden oder ins
 * Plugin `aza-license-bridge` übernehmen. Keine Secrets in Theme-Dateien.
 *
 * Voraussetzungen:
 * - gleiche Optionen wie License Bridge: aza_lb_api_url, aza_lb_wc_secret
 * - WC_PROVISION_SECRET auf dem Server = aza_lb_wc_secret
 *
 * Endpunkte:
 * - POST {api}/wc/subscription_period
 *   Header: X-WC-Secret, Content-Type: application/json
 *   Body: siehe aza_lb_send_subscription_period()
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

/**
 * Sendet aktuelle Abrechnungsperiode für eine WooCommerce-Subscription-ID an AZA.
 *
 * @param WC_Subscription|object $subscription Subscription-Objekt (WCS).
 * @return array|WP_Error
 */
function aza_lb_send_subscription_period( $subscription ) {
    if ( ! is_object( $subscription ) || ! method_exists( $subscription, 'get_id' ) ) {
        return new WP_Error( 'aza_lb_invalid_sub', 'Kein Subscription-Objekt.' );
    }

    $sub_numeric = (int) $subscription->get_id();
    if ( $sub_numeric <= 0 ) {
        return new WP_Error( 'aza_lb_bad_sub_id', 'Ungültige Subscription-ID.' );
    }

    $api_url   = rtrim( (string) get_option( 'aza_lb_api_url', 'https://api.aza-medwork.ch' ), '/' );
    $wc_secret = (string) get_option( 'aza_lb_wc_secret', '' );
    if ( $wc_secret === '' ) {
        return new WP_Error( 'aza_lb_no_secret', 'WC Provision Secret nicht konfiguriert.' );
    }

    $order_id = 0;
    if ( function_exists( 'aza_lb_get_parent_order_id_from_subscription' ) ) {
        $order_id = (int) aza_lb_get_parent_order_id_from_subscription( $subscription );
    } elseif ( method_exists( $subscription, 'get_parent_id' ) ) {
        $order_id = (int) $subscription->get_parent_id();
    }

    $payload = array(
        'wc_subscription_id' => $sub_numeric,
        'wc_order_id'          => $order_id,
    );

    // WooCommerce Subscriptions: nächste Zahlung & Abrechnungsrhythmus
    if ( method_exists( $subscription, 'get_date' ) ) {
        $next = $subscription->get_date( 'next_payment' );
        if ( is_string( $next ) && $next !== '' ) {
            $payload['next_payment_date'] = $next;
        }
    }

    if ( method_exists( $subscription, 'get_billing_period' ) ) {
        $payload['billing_period'] = (string) $subscription->get_billing_period();
    }
    if ( method_exists( $subscription, 'get_billing_interval' ) ) {
        $payload['billing_interval'] = (int) $subscription->get_billing_interval();
    }

    if ( method_exists( $subscription, 'get_status' ) ) {
        $payload['subscription_status'] = (string) $subscription->get_status();
    }

    $url = $api_url . '/wc/subscription_period';

    $response = wp_remote_post(
        $url,
        array(
            'timeout' => 20,
            'headers' => array(
                'Content-Type' => 'application/json',
                'X-WC-Secret'  => $wc_secret,
                'User-Agent'   => 'AZA-License-Bridge-Period/1.0',
            ),
            'body'    => wp_json_encode( $payload ),
        )
    );

    if ( is_wp_error( $response ) ) {
        return $response;
    }

    $code = (int) wp_remote_retrieve_response_code( $response );

    if ( $code >= 200 && $code < 300 ) {
        $data = json_decode( (string) wp_remote_retrieve_body( $response ), true );
        return is_array( $data ) ? $data : array( 'ok' => true );
    }

    return new WP_Error( 'aza_lb_period_failed', 'HTTP ' . $code );
}

/**
 * Beispiel-Hook: nach Zahlung Perioden pushen.
 * Bei Bedarf Cron oder Admin-Aktion ergänzen.
 */
add_action(
    'woocommerce_subscription_payment_complete',
    function ( $subscription ) {
        if ( function_exists( 'aza_lb_send_subscription_period' ) ) {
            aza_lb_send_subscription_period( $subscription );
        }
    },
    10,
    1
);