<?php

namespace addons\shopro_huifu\library;

/**
 * 从汇付支付通知/查单响应中提取微信侧交易标识（供购物订单/发货同步使用）
 */
class HuifuWxNotifyHelper
{
    public static function extract(array $data)
    {
        $wxResp = $data['wx_response'] ?? [];
        if (is_string($wxResp)) {
            $decoded = json_decode($wxResp, true);
            $wxResp = is_array($decoded) ? $decoded : [];
        }
        if (!is_array($wxResp)) {
            $wxResp = [];
        }

        $wxTransactionId = trim((string) ($wxResp['transaction_id'] ?? ''));
        if ($wxTransactionId === '') {
            $wxTransactionId = trim((string) ($data['out_trans_id'] ?? ''));
        }

        $wxSubOpenid = trim((string) ($wxResp['sub_openid'] ?? ''));
        if ($wxSubOpenid === '') {
            $wxSubOpenid = trim((string) ($data['sub_openid'] ?? ''));
        }

        return [
            'wx_transaction_id' => $wxTransactionId,
            'wx_sub_mch_id'     => trim((string) ($wxResp['sub_mch_id'] ?? '')),
            'wx_sub_openid'     => $wxSubOpenid,
            'hf_seq_id'         => trim((string) ($data['hf_seq_id'] ?? '')),
        ];
    }

    public static function encodeExtra(array $wxFields)
    {
        return json_encode([
            'wx_transaction_id' => $wxFields['wx_transaction_id'] ?? '',
            'wx_sub_mch_id'     => $wxFields['wx_sub_mch_id'] ?? '',
            'wx_sub_openid'     => $wxFields['wx_sub_openid'] ?? '',
        ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
    }

    public static function decodeExtra($extra)
    {
        if (!$extra) {
            return [];
        }
        if (is_array($extra)) {
            return $extra;
        }
        $decoded = json_decode($extra, true);
        return is_array($decoded) ? $decoded : [];
    }

    public static function resolveTransactionId(array $wxFields)
    {
        $wxTxn = trim((string) ($wxFields['wx_transaction_id'] ?? ''));
        if ($wxTxn !== '') {
            return $wxTxn;
        }
        return trim((string) ($wxFields['hf_seq_id'] ?? ''));
    }

    /**
     * Shopro 订单 payment_json 列为 varchar(2500)，汇付完整 notify 会超长
     */
    public static function buildPaymentJson(array $data, array $wxFields = null)
    {
        $wxFields = $wxFields ?: self::extract($data);

        $snapshot = [
            'req_seq_id'     => trim((string) ($data['req_seq_id'] ?? '')),
            'hf_seq_id'      => trim((string) ($data['hf_seq_id'] ?? '')),
            'trans_stat'     => trim((string) ($data['trans_stat'] ?? '')),
            'trans_amt'      => trim((string) ($data['trans_amt'] ?? '')),
            'resp_code'      => trim((string) ($data['resp_code'] ?? '')),
            'out_trans_id'   => trim((string) ($data['out_trans_id'] ?? '')),
            'transaction_id' => trim((string) ($wxFields['wx_transaction_id'] ?? '')),
            'sub_openid'     => trim((string) ($wxFields['wx_sub_openid'] ?? '')),
            'huifu_id'       => trim((string) ($data['huifu_id'] ?? '')),
            'pay_type'       => 'huifu_wechat',
            'wx_response'    => array_filter([
                'transaction_id' => trim((string) ($wxFields['wx_transaction_id'] ?? '')),
                'sub_mch_id'     => trim((string) ($wxFields['wx_sub_mch_id'] ?? '')),
                'sub_openid'     => trim((string) ($wxFields['wx_sub_openid'] ?? '')),
            ]),
        ];

        $json = json_encode($snapshot, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        if (strlen($json) <= 2400) {
            return $json;
        }

        unset($snapshot['wx_response']);
        return json_encode($snapshot, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
    }
}