<?php
declare(strict_types=1);

namespace addon\paycenter\library;

use addon\paycenter\library\contract\Channel;
use Psr\Http\Message\MessageInterface;
use think\Response;
use Yansongda\Artful\Rocket;
use Yansongda\Supports\Collection;

/**
 * 支付宝渠道（证书模式，yansongda/pay v3）。
 *
 * 场景映射：
 *   web → 电脑网站支付（返回自动提交表单 HTML）
 *   wap → 手机网站支付（返回自动提交表单 HTML）
 *   qr  → 当面付扫码（返回二维码地址）
 *   app → App 支付（返回前端唤起参数）
 */
class AlipayChannel implements Channel
{
    /** 已付款状态（与 MarketService 旧逻辑一致） */
    private const PAID_STATUS = ['TRADE_SUCCESS', 'TRADE_FINISHED'];

    public function code(): string
    {
        return 'alipay';
    }

    public function name(): string
    {
        return '支付宝';
    }

    public function configured(): bool
    {
        $cfg = PayConfig::get('alipay');

        return !empty($cfg['app_id']) && !empty($cfg['app_secret_cert']);
    }

    public function scenes(): array
    {
        return ['web', 'wap', 'qr', 'app'];
    }

    public function create(array $order, string $scene, array $urls): array
    {
        $params = [
            'out_trade_no' => (string) $order['trade_no'],
            'total_amount' => (string) $order['amount'],
            'subject'      => (string) $order['subject'],
        ];
        // 每单回调地址只能走 params（下划线前缀），写在配置里会被容器忽略，见 PayFactory 注释
        if (!empty($urls['notify'])) {
            $params['_notify_url'] = (string) $urls['notify'];
        }
        if (!empty($urls['return'])) {
            $params['_return_url'] = (string) $urls['return'];
        }

        $pay = PayFactory::alipay();
        switch ($scene) {
            case 'wap':
                $result = $pay->wap($params);
                break;
            case 'qr':
                $result = $pay->scan($params);
                break;
            case 'app':
                $result = $pay->app($params);
                break;
            default:
                $result = $pay->web($params);
        }

        return ['trade_no' => (string) $order['trade_no']] + self::normalize($result);
    }

    public function query(string $tradeNo): array
    {
        $result = PayFactory::alipay()->query(['out_trade_no' => $tradeNo]);

        return [
            'paid'       => in_array((string) $result->get('trade_status', ''), self::PAID_STATUS, true),
            'amount'     => (float) $result->get('total_amount', 0),
            'gateway_no' => (string) $result->get('trade_no', ''),
        ];
    }

    public function notify(): array
    {
        // v3.7 无 verify()，callback() 内部完成验签
        $data = PayFactory::alipay()->callback();

        return [
            'paid'       => in_array((string) $data->get('trade_status', ''), self::PAID_STATUS, true),
            'trade_no'   => (string) $data->get('out_trade_no', ''),
            'amount'     => (float) $data->get('total_amount', 0),
            'gateway_no' => (string) $data->get('trade_no', ''),
        ];
    }

    public function ack(bool $ok = true): Response
    {
        if (!$ok) {
            return response('fail', 200, ['Content-Type' => 'text/plain; charset=utf-8']);
        }
        $psr = PayFactory::alipay()->success();

        return response((string) $psr->getBody(), $psr->getStatusCode(), ['Content-Type' => 'text/plain; charset=utf-8']);
    }

    public function refund(string $tradeNo, float $amount, float $total): array
    {
        try {
            PayFactory::alipay()->refund([
                'out_trade_no'  => $tradeNo,
                'trade_no'      => '',
                'refund_amount' => $amount,
                'out_request_no' => 'R' . $tradeNo . date('His'),
                'refund_reason' => '买家申请退款',
            ]);

            return ['ok' => true, 'message' => '退款申请已提交'];
        } catch (\Throwable $e) {
            return ['ok' => false, 'message' => $e->getMessage()];
        }
    }

    /**
     * 网关返回值归一化。
     *
     * shortcut 的返回类型声明为 ResponseInterface|Rocket，实际由 ResponsePlugin 决定；
     * 直接调 getBody() 在拿到 Rocket 时会致命错误，这里按类型分流。
     *
     * @return array{type: string, content: mixed}
     */
    private static function normalize($result): array
    {
        if ($result instanceof Rocket) {
            $result = $result->getDestination() ?? $result->getPayload();
        }
        if ($result instanceof MessageInterface) {
            return ['type' => 'form', 'content' => $result->getBody()->getContents()];
        }
        if ($result instanceof Collection) {
            $qr = (string) ($result->get('qr_code') ?: $result->get('code_url') ?: '');
            if ($qr !== '') {
                return ['type' => 'qrcode', 'content' => $qr];
            }
            $url = (string) ($result->get('h5_url') ?: $result->get('mweb_url') ?: '');
            if ($url !== '') {
                return ['type' => 'url', 'content' => $url];
            }

            return ['type' => 'params', 'content' => $result->toArray()];
        }
        if (is_string($result)) {
            return ['type' => 'form', 'content' => $result];
        }

        throw new PayException('支付发起失败：网关返回了无法识别的响应', 500);
    }
}