/**
 * Plugin Name: LINE WooCommerce Subscription Bridge
 * Description: Sends LINE notifications for WooCommerce subscriptions.
 * Version: 3.2
 * Author: Marie Kirton-Daike
 * Copyright 2025 Marie Kirton-Daike
 * License: This plugin is proprietary software. 
 * Unauthorized use, modification, or distribution is prohibited.
 */


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

class Line_WC_Bridge {

    private $settings;

    public function __construct() {
        $this->settings = get_option('line_wc_settings');

        add_action('woocommerce_subscription_status_updated', [$this, 'on_subscription_status_update'], 10, 3);
        add_action('rest_api_init', [$this, 'register_line_webhook']);

        if (is_admin()) {
            $settings_file = plugin_dir_path(__FILE__) . 'admin/settings-page.php';
            if (file_exists($settings_file)) require_once $settings_file;
        }

        do_action('qm/debug', "✅ LINE WooCommerce Subscription Bridge loaded.");
    }

    // Handle subscription status updates
    public function on_subscription_status_update($subscription, $new_status, $old_status) {
        if (!is_a($subscription, 'WC_Subscription')) return;

        $user_id = $subscription->get_user_id();
        if (!$user_id) return;

        $line_user_id = get_user_meta($user_id, 'sll_lineid', true);
        if (empty($line_user_id)) return;

        // Only act if subscription contains the LINE product
        $has_line_product = false;
        foreach ($subscription->get_items() as $item) {
            if ($item->get_product_id() == $this->settings['line_product_id']) {
                $has_line_product = true;
                break;
            }
        }
        if (!$has_line_product) return;

        $subs_url = wc_get_endpoint_url('subscriptions', '', wc_get_page_permalink('myaccount'));

        // Treat trash as cancelled
        $status_to_use = ($new_status === 'trash') ? 'cancelled' : $new_status;

        // Skip active and pending-cancel
        if ($status_to_use === 'active' || $status_to_use === 'pending-cancel') return;

        // Map status to admin message
        $status_message_map = [
            'processing'      => $this->settings['processing'] ?? '',
            'on-hold'         => $this->settings['on_hold'] ?? '',
            'cancelled'       => $this->settings['cancelled'] ?? '',
            'expired'         => $this->settings['expired'] ?? '',
            'pending-cancel'  => $this->settings['pending_cancel'] ?? ''
        ];

        $message = $status_message_map[$status_to_use] ?: "ℹ️ Subscription status: " . ucfirst($status_to_use);

        // Add subscription URL for relevant statuses
        if (in_array($status_to_use, ['on-hold', 'expired'])) {
            $message .= " {$subs_url}";
        }

        self::send_line_push($line_user_id, $message);
    }

    // Send LINE message
    public static function send_line_push($line_user_id, $message, $access_token = null) {
        $settings = get_option('line_wc_settings');
        $access_token = $access_token ?: ($settings['access_token'] ?? '');
        if (!$access_token) return;

        $url = 'https://api.line.me/v2/bot/message/push';
        $data = [
            'to' => $line_user_id,
            'messages' => [['type'=>'text','text'=>$message]]
        ];

        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            "Content-Type: application/json",
            "Authorization: Bearer {$access_token}"
        ]);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_exec($ch);
        curl_close($ch);

        do_action('qm/debug', "📤 LINE message sent: {$message}");
    }

    // Register webhook
    public function register_line_webhook() {
        register_rest_route('line-bridge/v1', '/webhook', [
            'methods' => 'POST',
            'callback' => [$this, 'handle_line_webhook'],
            'permission_callback' => '__return_true',
        ]);
    }

    // Handle LINE webhook
    public function handle_line_webhook($request) {
        $body = $request->get_body();
        $data = json_decode($body, true);
        if (!isset($data['events'])) return rest_ensure_response(['status'=>'no events']);

        foreach ($data['events'] as $event) {
            $line_user_id = $event['source']['userId'];

            if ($event['type'] === 'follow') {
                $this->send_subscription_status_on_follow($line_user_id);
            }

            if ($event['type'] === 'message' && $event['message']['type'] === 'text') {
                handleMessageForWooCommerceSubscriptions($line_user_id, get_option('line_wc_settings'));
            }
        }

        return rest_ensure_response(['status'=>'ok']);
    }

    // Send subscription statuses when a user follows
    public function send_subscription_status_on_follow($line_user_id) {
        $users = get_users([
            'meta_key'=>'sll_lineid',
            'meta_value'=>$line_user_id,
            'number'=>1
        ]);

        if (empty($users)) {
            $msg = $this->settings['not_linked'] ?: "You do not have a linked subscription.";
            self::send_line_push($line_user_id, $msg);
            return;
        }

        $user = $users[0];

        $subscriptions = wcs_get_users_subscriptions($user->ID, [
            'order' => 'DESC',
            'status' => 'any'
        ]);

        $line_subs = [];
        foreach ($subscriptions as $sub) {
            foreach ($sub->get_items() as $item) {
                if ($item->get_product_id() == $this->settings['line_product_id']) {
                    $line_subs[] = $sub;
                }
            }
        }

        if (empty($line_subs)) {
            $msg = $this->settings['no_active'] ?: "You have no active LINE subscriptions.";
            self::send_line_push($line_user_id, $msg);
            return;
        }

        $status_message_map = [
            'on-hold'         => $this->settings['on_hold'] ?? '',
            'cancelled'       => $this->settings['cancelled'] ?? '',
            'expired'         => $this->settings['expired'] ?? '',
            'pending-cancel'  => $this->settings['pending_cancel'] ?? '',
            'trash'           => $this->settings['cancelled'] ?? '' // trash as cancelled
        ];

        foreach ($line_subs as $sub) {
            $status = $sub->get_status();
            if ($status === 'active' || $status === 'pending-cancel') continue;

            $key = ($status === 'trash') ? 'trash' : $status;
            $message = $status_message_map[$key] ?: "ℹ️ LINE Subscription status: " . ucfirst($status);

            self::send_line_push($line_user_id, $message);
        }
    }
}

// Handle LINE messages
function handleMessageForWooCommerceSubscriptions($line_user_id, $settings) {
    $users = get_users([
        'meta_key'   => 'sll_lineid',
        'meta_value' => $line_user_id,
        'number'     => 1
    ]);

    if (empty($users)) {
        $msg = $settings['not_linked'] ?? "You do not have a linked subscription.";
        Line_WC_Bridge::send_line_push($line_user_id, $msg);
        return;
    }

    $user = $users[0];

    $subs = wcs_get_users_subscriptions($user->ID, [
        'order' => 'DESC',
        'status' => 'any'
    ]);

    if (empty($subs)) {
        $msg = $settings['no_active'] ?? "You have no active subscriptions.";
        Line_WC_Bridge::send_line_push($line_user_id, $msg);
        return;
    }

    $status_message_map = [
        'on-hold'         => $settings['on_hold'] ?? '',
        'cancelled'       => $settings['cancelled'] ?? '',
        'expired'         => $settings['expired'] ?? '',
        'pending-cancel'  => $settings['pending_cancel'] ?? '',
        'trash'           => $settings['cancelled'] ?? '' // trash as cancelled
    ];

    foreach ($subs as $sub) {
        $status = $sub->get_status();
        if ($status === 'active' || $status === 'pending-cancel') continue;

        $key = ($status === 'trash') ? 'trash' : $status;
        $message = $status_message_map[$key] ?: "ℹ️ Subscription status: " . ucfirst($status);

        Line_WC_Bridge::send_line_push($line_user_id, $message);
    }
}

// Instantiate the plugin
new Line_WC_Bridge();

/*
 * Copyright 2025 Marie Kirton-Daike
 * All rights reserved. 
 * You may not copy, distribute, or use this code without permission.
 */