<?php

namespace app\api\controller;

use app\common\controller\Api;
use app\common\library\PaymentService;
use app\common\library\WxPayV3Service;
use think\Db;
use think\Log;
use think\Response;

/**
 * 微信支付 APIv3 异步通知回调控制器
 * 覆盖：JSAPI 交易支付通知 / 原路退款通知 / 商家转账(1005)结果通知
 */
class Wxpay extends Api
{
    protected $noNeedLogin = ['notify', 'refundNotify', 'transferNotify'];
    protected $noNeedRight = '*';

    /**
     * 1. 微信支付交易结果异步通知 (/api/wxpay/notify)
     */
    public function notify()
    {
        try {
            $parsed    = $this->parseAndVerifyCallback();
            $eventType = strtoupper($parsed['event_type']);
            $data      = $parsed['data'];

            if ($eventType === 'TRANSACTION.SUCCESS' && !empty($data['out_trade_no'])) {
                PaymentService::confirmOrderPay((string)$data['out_trade_no'], $data);
            }
            return $this->wxResponse(true);
        } catch (\Throwable $e) {
            Log::error('[Wxpay::notify] ' . $e->getMessage());
            return $this->wxResponse(false, $e->getMessage());
        }
    }

    /**
     * 2. 微信原路退款结果异步通知 (/api/wxpay/refundNotify)
     */
    public function refundNotify()
    {
        try {
            $parsed      = $this->parseAndVerifyCallback();
            $data        = $parsed['data'];
            $outRefundNo = trim((string)($data['out_refund_no'] ?? ''));
            $outTradeNo  = trim((string)($data['out_trade_no'] ?? ''));
            $refStatus   = strtoupper((string)($data['refund_status'] ?? ''));

            if ($outRefundNo === '' && $outTradeNo === '') {
                throw new \RuntimeException('退款回调缺少商户退款单号与商户支付单号');
            }

            $q = Db::name('pay_order');
            if ($outRefundNo !== '') {
                $q->where('refund_no', $outRefundNo);
            } else {
                $q->where('out_trade_no', $outTradeNo);
            }
            $po = $q->find();
            if (!$po) {
                Log::error("[Wxpay::refundNotify] 未找到本地支付流水单 out_refund_no={$outRefundNo}, out_trade_no={$outTradeNo}");
                throw new \RuntimeException('未匹配到本地支付交易流水单');
            }

            try {
                PaymentService::applyWxRefundResult($po, $data);
            } catch (\Throwable $refundEx) {
                // 若微信已下发明确退款异常/关闭终态，系统已完整落库记录原因并写入告警日志，向微信回传成功避免重复轰炸
                if (in_array($refStatus, ['ABNORMAL', 'CLOSED'], true)) {
                    Log::error("[Wxpay::refundNotify] 退款终态异常已落库 out_trade_no={$po['out_trade_no']}, status={$refStatus}, reason=" . $refundEx->getMessage());
                    return $this->wxResponse(true);
                }
                throw $refundEx;
            }

            return $this->wxResponse(true);
        } catch (\Throwable $e) {
            Log::error('[Wxpay::refundNotify] ' . $e->getMessage());
            return $this->wxResponse(false, $e->getMessage());
        }
    }

    /**
     * 3. 微信新版「商家转账」终态结果异步通知 (/api/wxpay/transferNotify)
     */
    public function transferNotify()
    {
        try {
            $parsed    = $this->parseAndVerifyCallback();
            $data      = $parsed['data'];
            $outBillNo = trim((string)($data['out_bill_no'] ?? ''));

            if ($outBillNo === '') {
                throw new \RuntimeException('商家转账回调缺少商户转账单号 out_bill_no');
            }

            $wd = Db::name('withdraw')->where('out_bill_no', $outBillNo)->find();
            if (!$wd) {
                Log::error("[Wxpay::transferNotify] 未找到本地提现单记录 out_bill_no={$outBillNo}");
                throw new \RuntimeException('未找到匹配的本地提现单');
            }
            PaymentService::syncWithdrawTransfer((int)$wd['id'], $data);
            return $this->wxResponse(true);
        } catch (\Throwable $e) {
            Log::error('[Wxpay::transferNotify] ' . $e->getMessage());
            return $this->wxResponse(false, $e->getMessage());
        }
    }

    /**
     * 读取原始报文并使用微信支付公钥验签 + AES-256-GCM 解密
     */
    protected function parseAndVerifyCallback()
    {
        $rawBody = file_get_contents('php://input');
        if ($rawBody === false || $rawBody === '') {
            $rawBody = (string)$this->request->getInput();
        }
        $headers = $this->request->header();
        $wxSvc   = new WxPayV3Service();
        return $wxSvc->verifyAndDecryptNotify((string)$rawBody, is_array($headers) ? $headers : []);
    }

    /**
     * 输出符合微信支付 APIv3 规范的 HTTP 响应
     */
    protected function wxResponse($ok, $msg = '')
    {
        $code = $ok ? 200 : 500;
        $body = [
            'code'    => $ok ? 'SUCCESS' : 'FAIL',
            'message' => $ok ? '成功' : ($msg ?: '处理失败'),
        ];
        return Response::create($body, 'json', $code);
    }
}