<?php
defined('ABSPATH') || exit;

trait AKSRT_Shipping_Part_1 {

    private function send_shipping_notification(string $order_number, string $carrier, string $tracking_no, string $note = ''): void {
        if (!class_exists('AKSRT_Order_Repository')) {
            return;
        }

        $order = AKSRT_Order_Repository::get_instance()->get($order_number);
        if (!$order) {
            return;
        }

        $user_id = (int) ($order['user_id'] ?? 0);
        if ($user_id <= 0) {
            return;
        }

        $user = get_userdata($user_id);
        if (!$user || empty($user->user_email)) {
            return;
        }

        $carrier_label = $this->get_carrier_label($carrier);
        $site_name = get_bloginfo('name');
        $subject = sprintf(__('[%s] 您的订单已发货', 'aksrt'), $site_name);
        $body = sprintf(
            __('您好 %1$s，\n\n您的订单 %2$s 已发货。\n\n物流公司：%3$s\n运单号：%4$s\n%5$s\n\n如有疑问请联系客服。\n\n%s', 'aksrt'),
            $user->display_name,
            $order_number,
            $carrier_label,
            $tracking_no,
            $note !== '' ? sprintf(__('备注：%s', 'aksrt'), $note) : '',
            $site_name
        );

        wp_mail($user->user_email, $subject, $body);
    }

    private function decorate_record(array $record): array {
        $record['id'] = (int) ($record['id'] ?? 0);
        $record['operator_id'] = isset($record['operator_id']) ? (int) $record['operator_id'] : 0;
        $record['status_label'] = $this->get_status_label((string) ($record['status'] ?? ''));
        $record['carrier_label'] = $this->get_carrier_label((string) ($record['carrier'] ?? ''));
        $record['operator'] = $this->get_user_summary((int) ($record['operator_id'] ?? 0));
        return $record;
    }

    private function get_carrier_label(string $carrier): string {
        foreach (self::get_carrier_options() as $item) {
            if (($item['value'] ?? '') === $carrier) {
                return (string) ($item['label'] ?? $carrier);
            }
        }

        return $carrier;
    }

    private function get_status_label(string $status): string {
        foreach (self::get_status_options() as $item) {
            if (($item['value'] ?? '') === $status) {
                return (string) ($item['label'] ?? $status);
            }
        }

        return $status;
    }

    private function get_user_summary(int $user_id): array {
        if ($user_id <= 0) {
            return [];
        }

        $user = get_userdata($user_id);
        if (!$user) {
            return [];
        }

        return [
            'id' => $user_id,
            'display_name' => (string) $user->display_name,
            'user_login' => (string) $user->user_login,
        ];
    }

    private function build_summary_item(array $record): array {
        return [
            'id' => (int) ($record['id'] ?? 0),
            'status' => (string) ($record['status'] ?? ''),
            'status_label' => (string) ($record['status_label'] ?? ''),
            'carrier' => (string) ($record['carrier'] ?? ''),
            'carrier_label' => (string) ($record['carrier_label'] ?? ''),
            'tracking_no' => (string) ($record['tracking_no'] ?? ''),
            'created_at' => (string) ($record['created_at'] ?? ''),
            'updated_at' => (string) ($record['updated_at'] ?? ''),
            'delivered_at' => (string) ($record['delivered_at'] ?? ''),
        ];
    }

    private function can_transition_status(string $current_status, string $new_status): bool {
        $map = [
            self::STATUS_SHIPPED => [self::STATUS_IN_TRANSIT, self::STATUS_DELIVERED, self::STATUS_RETURNED],
            self::STATUS_IN_TRANSIT => [self::STATUS_DELIVERED, self::STATUS_RETURNED],
            self::STATUS_DELIVERED => [],
            self::STATUS_RETURNED => [],
        ];

        return in_array($new_status, $map[$current_status] ?? [], true);
    }

    private function sync_order_status(string $order_number, string $shipping_status, string $note = ''): void {
        if ($order_number === '' || !class_exists('AKSRT_Order_Repository') || !class_exists('AKSRT_Order')) {
            return;
        }

        if (!in_array($shipping_status, [self::STATUS_SHIPPED, self::STATUS_IN_TRANSIT, self::STATUS_DELIVERED], true)) {
            return;
        }

        AKSRT_Order_Repository::get_instance()->update_status($order_number, AKSRT_Order::STATUS_DELIVERED, [
            'note' => $note,
        ]);
    }

    /* ============================================================
     * Express Query API (§6.6 快递查询)
     *
     * Supports kuaidi100, aliyun, kdniao.
     * Traces cached in order_shipping.express_data JSON.
     * Refresh interval from shop settings.
     * ============================================================ */

    public function query_express(int $shipping_id, bool $force = false): array {
        global $wpdb;
        $record = $this->get($shipping_id);
        if (!$record) {
            return ['success' => false, 'message' => __('发货记录不存在', 'aksrt')];
        }

        $tracking_no = (string) ($record['tracking_no'] ?? '');
        $carrier = (string) ($record['carrier'] ?? '');
        if ($tracking_no === '' || $carrier === '') {
            return ['success' => false, 'message' => __('缺少运单号或物流公司', 'aksrt')];
        }

        $cached = $this->get_express_cache($shipping_id);
        if (!$force && !empty($cached) && !$this->should_refresh_cache($cached)) {
            return ['success' => true, 'data' => $cached];
        }

        if (!empty($cached['signed'])) {
            return ['success' => true, 'data' => $cached];
        }

        $shop_settings = class_exists('AKSRT_Settings') ? AKSRT_Settings::get_shop_settings() : [];
        $api_sdk = sanitize_key((string) ($shop_settings['express']['api_sdk'] ?? 'kuaidi100'));

        $result = $this->call_express_api($api_sdk, $carrier, $tracking_no, $shop_settings);

        if ($result['success']) {
            $express_data = [
                'query_time' => current_time('mysql'),
                'traces'     => $result['traces'] ?? [],
                'state'      => $result['state'] ?? 'unknown',
                'signed'     => !empty($result['signed']),
                'api'        => $api_sdk,
            ];

            $wpdb->update(
                $this->table(),
                ['note' => wp_json_encode($express_data, JSON_UNESCAPED_UNICODE)],
                ['id' => $shipping_id],
                ['%s'],
                ['%d']
            );

            if (!empty($result['signed']) && ($record['status'] ?? '') !== self::STATUS_DELIVERED) {
                $this->update_status($shipping_id, self::STATUS_DELIVERED, __('快递已签收（API检测）', 'aksrt'));
            }

            return ['success' => true, 'data' => $express_data];
        }

        return $result;
    }

    private function get_express_cache(int $shipping_id): array {
        global $wpdb;
        $note = $wpdb->get_var($wpdb->prepare(
            "SELECT note FROM {$this->table()} WHERE id = %d",
            $shipping_id
        ));
        if (!$note) return [];
        $data = json_decode($note, true);
        return is_array($data) && isset($data['traces']) ? $data : [];
    }

    private function should_refresh_cache(array $cached): bool {
        if (empty($cached['query_time'])) return true;

        $shop = class_exists('AKSRT_Settings') ? AKSRT_Settings::get_shop_settings() : [];
        $interval = max(30, min(240, (int) ($shop['express']['query_interval'] ?? 60)));

        $last = strtotime($cached['query_time']);
        return (time() - $last) > ($interval * 60);
    }

    private function call_express_api(string $sdk, string $carrier, string $tracking_no, array $settings): array {
        $carrier_code = $this->map_carrier_code($sdk, $carrier);

        if ($sdk === 'kuaidi100') {
            return $this->query_kuaidi100($carrier_code, $tracking_no, $settings);
        }
        if ($sdk === 'kdniao') {
            return $this->query_kdniao($carrier_code, $tracking_no, $settings);
        }
        if ($sdk === 'aliyun') {
            return $this->query_aliyun($carrier_code, $tracking_no, $settings);
        }

        return ['success' => false, 'message' => __('未配置快递查询接口', 'aksrt')];
    }

    private function query_kuaidi100(string $com, string $num, array $settings): array {
        $key = sanitize_text_field((string) ($settings['express']['kuaidi100_key'] ?? ''));
        $customer = sanitize_text_field((string) ($settings['express']['kuaidi100_customer'] ?? ''));
        if ($key === '' || $customer === '') {
            return ['success' => false, 'message' => __('快递100 API 未配置', 'aksrt')];
        }

        $param = wp_json_encode(['com' => $com, 'num' => $num]);
        $sign = strtoupper(md5($param . $key . $customer));

        $response = wp_remote_post('https://poll.kuaidi100.com/poll/query.do', [
            'body'    => ['customer' => $customer, 'sign' => $sign, 'param' => $param],
            'timeout' => 10,
        ]);

        if (is_wp_error($response)) {
            return ['success' => false, 'message' => $response->get_error_message()];
        }

        $body = json_decode(wp_remote_retrieve_body($response), true);
        if (!is_array($body) || (int) ($body['status'] ?? 0) !== 200) {
            return ['success' => false, 'message' => (string) ($body['message'] ?? __('查询失败', 'aksrt'))];
        }

        $state = (string) ($body['state'] ?? '0');
        $signed = $state === '3';

        $traces = [];
        foreach ((array) ($body['data'] ?? []) as $item) {
            $traces[] = [
                'time'    => (string) ($item['ftime'] ?? $item['time'] ?? ''),
                'context' => (string) ($item['context'] ?? ''),
            ];
        }

        return ['success' => true, 'traces' => $traces, 'state' => $state, 'signed' => $signed];
    }

    private function query_kdniao(string $code, string $num, array $settings): array {
        $app_id = sanitize_text_field((string) ($settings['express']['kdniao_app_id'] ?? ''));
        $app_key = sanitize_text_field((string) ($settings['express']['kdniao_app_key'] ?? ''));
        if ($app_id === '' || $app_key === '') {
            return ['success' => false, 'message' => __('快递鸟 API 未配置', 'aksrt')];
        }

        $request_data = wp_json_encode(['ShipperCode' => $code, 'LogisticCode' => $num]);
        $data_sign = urlencode(base64_encode(md5($request_data . $app_key)));

        $response = wp_remote_post('https://api.kdniao.com/Ebusiness/EbusinessOrderHandle.aspx', [
            'body'    => [
                'RequestData' => urlencode($request_data),
                'EBusinessID' => $app_id,
                'RequestType' => '1002',
                'DataSign'    => $data_sign,
                'DataType'    => '2',
            ],
            'timeout' => 10,
        ]);

        if (is_wp_error($response)) {
            return ['success' => false, 'message' => $response->get_error_message()];
        }

        $body = json_decode(wp_remote_retrieve_body($response), true);
        if (!is_array($body) || !($body['Success'] ?? false)) {
            return ['success' => false, 'message' => (string) ($body['Reason'] ?? __('查询失败', 'aksrt'))];
        }

        $state = (string) ($body['State'] ?? '0');
        $signed = $state === '3';

        $traces = [];
        foreach ((array) ($body['Traces'] ?? []) as $item) {
            $traces[] = [
                'time'    => (string) ($item['AcceptTime'] ?? ''),
                'context' => (string) ($item['AcceptStation'] ?? ''),
            ];
        }

        return ['success' => true, 'traces' => $traces, 'state' => $state, 'signed' => $signed];
    }

    private function query_aliyun(string $code, string $num, array $settings): array {
        $app_code = sanitize_text_field((string) ($settings['express']['aliyun_app_code'] ?? ''));
        if ($app_code === '') {
            return ['success' => false, 'message' => __('阿里云快递 API 未配置', 'aksrt')];
        }

        $url = add_query_arg(['no' => $num, 'type' => $code], 'https://wuliu.market.alicloudapi.com/kdi');

        $response = wp_remote_get($url, [
            'headers' => ['Authorization' => 'APPCODE ' . $app_code],
            'timeout' => 10,
        ]);

        if (is_wp_error($response)) {
            return ['success' => false, 'message' => $response->get_error_message()];
        }

        $body = json_decode(wp_remote_retrieve_body($response), true);
        if (!is_array($body) || (int) ($body['status'] ?? -1) !== 0) {
            return ['success' => false, 'message' => (string) ($body['msg'] ?? __('查询失败', 'aksrt'))];
        }

        $result_data = $body['result'] ?? [];
        $state = (string) ($result_data['deliverystatus'] ?? '0');
        $signed = $state === '3';

        $traces = [];
        foreach ((array) ($result_data['list'] ?? []) as $item) {
            $traces[] = [
                'time'    => (string) ($item['time'] ?? ''),
                'context' => (string) ($item['status'] ?? ''),
            ];
        }

        return ['success' => true, 'traces' => $traces, 'state' => $state, 'signed' => $signed];
    }

    private function map_carrier_code(string $sdk, string $carrier): string {
        $kuaidi100_map = [
            'sf' => 'shunfeng', 'yd' => 'yunda', 'zt' => 'zhongtong', 'yt' => 'yuantong',
            'sto' => 'shentong', 'jd' => 'jd', 'ems' => 'ems', 'db' => 'debangkuaidi',
            'yunda' => 'yunda',
        ];
        $kdniao_map = [
            'sf' => 'SF', 'yd' => 'YD', 'zt' => 'ZTO', 'yt' => 'YTO',
            'sto' => 'STO', 'jd' => 'JD', 'ems' => 'EMS', 'db' => 'DBL',
            'yunda' => 'YD',
        ];

        if ($sdk === 'kuaidi100') {
            return $kuaidi100_map[$carrier] ?? $carrier;
        }
        if ($sdk === 'kdniao') {
            return $kdniao_map[$carrier] ?? strtoupper($carrier);
        }
        return $carrier;
    }
}