<?php

namespace app\common\library;

class PrinterService
{
    protected $user;
    protected $ukey;
    protected $sn;
    protected $enabled = true;
    protected $copies = 1;
    protected $expiresIn = 3600;
    protected $shopName = '小众厨房设备商城';
    protected $url = 'https://open.xpyun.net/api/openapi/xprinter/';

    public function __construct()
    {
        $config = function_exists('config') ? config('printer') : [];
        if (!is_array($config) || empty($config)) {
            $configFile = __DIR__ . '/../../extra/printer.php';
            $config = file_exists($configFile) ? include $configFile : [];
        }
        $config = is_array($config) ? $config : [];

        // 后台配置优先；空字段保留文件配置，方便首次迁移时平滑过渡。
        try {
            $backendConfig = \addons\shopro\model\Config::load('printer');
            if (is_array($backendConfig)) {
                foreach ($backendConfig as $key => $value) {
                    if ($value !== '' && $value !== null) {
                        $config[$key] = $value;
                    }
                }
            }
        } catch (\Exception $e) {
            \think\Log::warning('读取后台小票配置失败: ' . $e->getMessage());
        }

        $this->user = isset($config['client_id']) ? trim($config['client_id']) : '';
        $this->ukey = isset($config['client_secret']) ? trim($config['client_secret']) : '';
        $this->sn = isset($config['sn']) ? trim($config['sn']) : '';
        $this->enabled = !isset($config['enable']) || (string)$config['enable'] !== '0';
        $this->copies = isset($config['copies']) ? max(1, min(65535, (int)$config['copies'])) : 1;
        $this->expiresIn = isset($config['expires_in']) ? max(60, min(604800, (int)$config['expires_in'])) : 3600;
        $this->shopName = !empty($config['shop_name']) ? trim($config['shop_name']) : $this->shopName;
    }

    public function queryStatus()
    {
        return $this->sendRequest('queryPrinterStatus', ['sn' => $this->sn]);
    }

    public function queryOrderState($cloudOrderId)
    {
        $result = $this->sendRequest('queryOrderState', ['orderId' => (string)$cloudOrderId]);
        $result['printed'] = !empty($result['accepted']) && !empty($result['data']);
        return $result;
    }

    public function printOrder($orderData = [], $copies = null)
    {
        $content = $this->buildReceiptContent($orderData);
        if ($this->gbkLength($content) > 12 * 1024) {
            return $this->failure('打印内容超过芯烨云 12KB 限制');
        }

        $result = $this->sendRequest('print', [
            'sn' => $this->sn,
            'content' => $content,
            'copies' => $copies === null ? $this->copies : max(1, min(65535, (int)$copies)),
            // 离线时由芯烨云暂存，避免本地重发造成重复小票。
            'mode' => 1,
            'expiresIn' => $this->expiresIn,
            'idempotent' => isset($orderData['print_idempotent']) ? $orderData['print_idempotent'] : '',
        ]);

        if (!empty($result['accepted']) && !is_scalar($result['data'])) {
            return $this->failure('芯烨云未返回打印订单号', $result['response']);
        }
        if (!empty($result['accepted'])) {
            $result['cloud_order_id'] = (string)$result['data'];
        }
        return $result;
    }

    public function buildReceiptContent($order = [])
    {
        $title = $this->cleanText(isset($order['shop_name']) ? $order['shop_name'] : $this->shopName);
        $orderSn = $this->cleanText(isset($order['order_sn']) ? $order['order_sn'] : 'TEST' . date('YmdHis'));
        $createTime = isset($order['createtime']) ? date('Y-m-d H:i:s', $order['createtime']) : date('Y-m-d H:i:s');
        $consignee = $this->cleanText(isset($order['consignee']) ? $order['consignee'] : '测试用户');
        $phone = $this->cleanText(isset($order['phone']) ? $order['phone'] : '138****8888');
        $address = $this->cleanText(isset($order['address']) ? $order['address'] : '贵州省修文县城内');
        $totalAmount = $this->cleanText(isset($order['total_fee']) ? $order['total_fee'] : '0.01');

        $info = '<CB>' . $title . '<BR></CB>';
        $info .= '<CB>-- 订单小票 --<BR></CB>';
        $info .= '--------------------------------<BR>';
        $info .= '订单编号：' . $orderSn . '<BR>';
        $info .= '下单时间：' . $createTime . '<BR>';
        $info .= '--------------------------------<BR>';
        $info .= '商品名称          数量   单价<BR>';

        foreach (!empty($order['items']) && is_array($order['items']) ? $order['items'] : [] as $item) {
            $info .= $this->cleanText(isset($item['name']) ? $item['name'] : '商品') . '  '
                . $this->cleanText(isset($item['num']) ? $item['num'] : 1) . '  ￥'
                . $this->cleanText(isset($item['price']) ? $item['price'] : '0.00') . '<BR>';
        }

        $info .= '--------------------------------<BR>';
        $info .= '合计金额：￥' . $totalAmount . ' 元<BR>';
        $info .= '客户姓名：' . $consignee . '<BR>';
        $info .= '联系电话：' . $phone . '<BR>';
        $info .= '送货地址：' . $address . '<BR>';
        $info .= '--------------------------------<BR>';
        return $info . '<CB>谢谢惠顾，欢迎再次光临！<BR><BR></CB>';
    }

    protected function sendRequest($endpoint, array $data)
    {
        if (!$this->enabled) {
            return $this->failure('后台未启用小票打印');
        }
        if (!$this->user || !$this->ukey || !$this->sn) {
            return $this->failure('打印机配置不完整');
        }

        $timestamp = (string)time();
        $payload = array_merge($data, [
            'user' => $this->user,
            'timestamp' => $timestamp,
            'sign' => sha1($this->user . $this->ukey . $timestamp),
        ]);
        $json = json_encode($payload, JSON_UNESCAPED_UNICODE);
        if ($json === false) {
            return $this->failure('打印请求编码失败');
        }

        $ch = curl_init($this->url . $endpoint);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $json);
        curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json;charset=UTF-8', 'Accept: application/json']);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
        $body = curl_exec($ch);
        $error = curl_error($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);

        if ($error) {
            return $this->failure('云打印请求失败: ' . $error, '', true);
        }

        $response = trim((string)$body);
        $decoded = json_decode($response, true);
        $accepted = $httpCode >= 200 && $httpCode < 300 && is_array($decoded)
            && isset($decoded['code']) && (int)$decoded['code'] === 0;

        return [
            'accepted' => $accepted,
            'data' => is_array($decoded) && array_key_exists('data', $decoded) ? $decoded['data'] : null,
            'response' => mb_substr($response, 0, 1000, 'UTF-8'),
            'error' => $accepted ? '' : (is_array($decoded) && !empty($decoded['msg']) ? $decoded['msg'] : '云打印未受理，HTTP ' . $httpCode),
            'uncertain' => false,
        ];
    }

    protected function failure($error, $response = '', $uncertain = false)
    {
        return ['accepted' => false, 'data' => null, 'response' => $response, 'error' => $error, 'uncertain' => $uncertain];
    }

    protected function gbkLength($content)
    {
        $encoded = function_exists('mb_convert_encoding')
            ? @mb_convert_encoding($content, 'GBK', 'UTF-8')
            : @iconv('UTF-8', 'GBK//IGNORE', $content);
        return $encoded === false ? strlen($content) : strlen($encoded);
    }

    protected function cleanText($value)
    {
        return preg_replace('/[\r\n\t]+/', ' ', strip_tags((string)$value));
    }
}