<?php

declare(strict_types=1);

namespace app\common\service\wechat;

use think\facade\Cache;
use think\facade\Log;

/**
 * 企业微信对外收款服务
 * 参考 https://developer.work.weixin.qq.com/document/path/93727
 */
class WechatWorkExternalPayService
{
    private string $corpId;
    private string $secret;

    public function __construct()
    {
        $config = config('pay.wechat_work', []);
        $this->corpId = (string)($config['corp_id'] ?? '');
        $this->secret = (string)($config['external_pay_secret'] ?? $config['secret'] ?? '');
    }

    /**
     * 获取 access_token（对外收款应用）
     */
    public function getAccessToken(): ?string
    {
        if (empty($this->corpId) || empty($this->secret)) {
            Log::error('企业微信对外收款：corp_id 或 external_pay_secret 未配置');
            return null;
        }

        $cacheKey = 'work_wechat_external_pay_token_' . md5($this->corpId . $this->secret);
        $cached = Cache::get($cacheKey);
        if ($cached) {
            return $cached;
        }

        $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid={$this->corpId}&corpsecret={$this->secret}";
        $response = $this->httpGet($url);

        if (!$response || ($response['errcode'] ?? -1) != 0) {
            Log::error('企业微信对外收款获取access_token失败: ' . json_encode($response));
            return null;
        }

        $accessToken = $response['access_token'];
        Cache::set($cacheKey, $accessToken, ($response['expires_in'] ?? 7200) - 200);
        return $accessToken;
    }

    /**
     * 获取对外收款记录
     * @param int $beginTime 开始时间戳（秒）
     * @param int $endTime 结束时间戳（秒）
     * @param string $payeeUserid 收款人userid，空则查全部
     * @param string $cursor 分页游标
     * @param int $limit 最大记录数，最大1000
     * @return array
     */
    public function getBillList(int $beginTime, int $endTime, string $payeeUserid = '', string $cursor = '', int $limit = 100): array
    {
        $accessToken = $this->getAccessToken();
        if (!$accessToken) {
            return ['errcode' => -1, 'errmsg' => '获取access_token失败', 'bill_list' => []];
        }

        $url = "https://qyapi.weixin.qq.com/cgi-bin/externalpay/get_bill_list?access_token={$accessToken}";
        $data = [
            'begin_time' => $beginTime,
            'end_time' => $endTime,
            'limit' => $limit,
        ];
        if ($payeeUserid) {
            $data['payee_userid'] = $payeeUserid;
        }
        if ($cursor) {
            $data['cursor'] = $cursor;
        }

        $response = $this->httpPost($url, $data);
        if (!$response) {
            return ['errcode' => -1, 'errmsg' => '请求失败', 'bill_list' => []];
        }

        $billList = $response['bill_list'] ?? [];
        return [
            'errcode' => $response['errcode'] ?? 0,
            'errmsg' => $response['errmsg'] ?? '',
            'bill_list' => is_array($billList) ? $billList : [],
            'next_cursor' => $response['next_cursor'] ?? '',
        ];
    }

    private function httpGet(string $url)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
        $result = curl_exec($ch);
        curl_close($ch);
        return $result ? json_decode($result, true) : null;
    }

    private function httpPost(string $url, array $data)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
        $result = curl_exec($ch);
        curl_close($ch);
        return $result ? json_decode($result, true) : null;
    }
}