<?php
declare(strict_types=1);

namespace App\Services\HealthRecordAuth;

use App\Utils\SM4;
use App\Utils\Traits\HttpRequest;
use Exception;

class Client
{
    use HttpRequest;

    //api接口地址
    private string $api_url = 'https://yyzc.gdgov.cn/ebus/jiankangdangan/gdehr/dhccApi/codeAuthRec/save';

    // 医院编号
    private string $org_code;

    // 医院名称
    private string $org_name;

    // App ID
    private string $app_id;

    private string $paas_id;

    private string $paas_token;

    // sm4 加密密钥
    private string $sm4_encrypt;

    /**
     * Client constructor.
     */
    public function __construct()
    {
        $this->org_code = env('HEALTH_RECORD_HOSPITAL_COST_CODE', '');
        $this->org_name = env('HEALTH_RECORD_HOSPITAL_COST_NAME', '');
        $this->app_id = env('HEALTH_RECORD_HOSPITAL_APP_ID', '');
        $this->paas_id = env('HEALTH_RECORD_HOSPITAL_PAAS_ID', '');
        $this->paas_token = env('HEALTH_RECORD_HOSPITAL_PAAS_TOKEN', '');
        $this->sm4_encrypt = env('HEALTH_RECORD_HOSPITAL_SM4_ENCRYPT', '');
    }

    /**
     * 获取请求header
     * @return string[]
     */
    private function getRequestHeaders(): array
    {
        $timestamp = time();
        $nonceStr = $this->getNonceStr(11);
        $sign = $this->getSign((string) $timestamp, $nonceStr);

        return [
            'x-tif-timestamp:'. $timestamp,
            'x-tif-paasid:'. $this->paas_id,
            'x-tif-nonce:'. $nonceStr,
            'x-tif-signature:'. $sign
        ];
    }

    /**
     * 获取随机字符串
     * @param int $length
     * @return string
     */
    private function getNonceStr(int $length = 10): string
    {
        $chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
        $str = '';
        for ($i = 0; $i < $length; $i++)  {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }

        return $str;
    }

    /**
     * 生成签名
     * @param string $timestamp
     * @param string $nonceStr
     * @return string
     */
    private function getSign(string $timestamp, string $nonceStr): string
    {
        $signature = $timestamp. $this->paas_token. $nonceStr. $timestamp;
        // 使用SHA256算法对字符串进行哈希，返回就是十六进制字符串，无需再转
        $signature = hash('sha256', $signature);
        // 转全大写
        return strtoupper($signature);
    }

    /**
     * 记录日志
     * @param array $requestData
     * @param mixed|NULL $responseData
     * @return void
     */
    private function recordLog(array $requestData, mixed $responseData = NULL): void
    {
        date_default_timezone_set("Asia/Shanghai");
        $content = '[REQUEST TIME]'. date('Y-m-d H:i:s'). "\r\n".
            '[REQUEST DATA]'. json_encode($requestData, JSON_UNESCAPED_UNICODE). "\r\n";

        if (!empty($responseData)) {
            $content .= '[RESPONSE DATA]'. json_encode($responseData, JSON_UNESCAPED_UNICODE). "\r\n";
        }

        $filePath = "log". DIRECTORY_SEPARATOR. 'HealthRecordAuthLog'. DIRECTORY_SEPARATOR. date('Ym'). DIRECTORY_SEPARATOR;
        $fileName = date('d'). '.log';
        !is_dir($filePath) && mkdir($filePath, 0755, true);

        file_put_contents($filePath. $fileName, $content. "\r\n", FILE_APPEND);
    }

    /**
     * api 请求方式 RESETFul
     * @param array $data
     * @param string $type
     * @return bool|mixed|string
     */
    private function apiRequest(array $data, string $type = 'POST'): mixed
    {
        $headers = $this->getRequestHeaders();

        try {
            $response = $this->request($type, $this->api_url, [
                'headers' => $headers,
                'json' => $data
            ]);
            $response = json_decode($response, true);

            $this->recordLog($data, $response);

            return $response;
        } catch (Exception $e) {
            return false;
        }
    }

    /**
     * 申请授权
     * @param string $patientName
     * @param string $patientCardNo
     * @param int $status
     * @return bool|mixed|string
     * @throws Exception
     */
    public function applyAuth(string $patientName, string $patientCardNo, int $status = 0): mixed
    {
        $sm4 = new SM4($this->sm4_encrypt);
        $patientCardNo = $sm4->encrypt($patientCardNo);

        $data = [
            'codeAuthRec' => [
                'authDays' => 30, // 固定30天
                'patientIdcard' => $patientCardNo,
                'patientName' => $patientName,
                'org_code' => $this->org_code,
                'org_name' => $this->org_name,
                'status' => $status,
                'app_id' => $this->app_id
            ]
        ];

        return $this->apiRequest($data);
    }
}