<?php

namespace app\common\service;

use app\common\model\User;

use EasyWeChat\MiniApp\Application as xcxApplication;
use EasyWeChat\OpenPlatform\Application;
use support\Redis;
use GuzzleHttp\Client;
use support\exception\BusinessException;

class WechatService
{

    protected array $web;
    protected array $mini;
    protected array $login;
    protected $app;

    public function __construct()
    {
        $cfg = config('wechat');
        $this->web = $cfg['web'];
        $this->mini = $cfg['mini'];
        $this->login = $cfg['login'];
    }

    /**
     * 获取微信二维码
     */
    public function makeQrUrl()
    {
        try {
            $state = bin2hex(random_bytes(16));
            $ttl   = (int)($this->login['state_ttl'] ?? 300);

            // 记录 state
            Redis::setEx("wx:login:state:$state", $ttl, json_encode([
                'redirect' => $this->web['redirect'],
                'ts'       => time(),
            ], JSON_UNESCAPED_UNICODE));

            // 组装跳转地址
            $qrUrl = sprintf(
                'https://open.weixin.qq.com/connect/qrconnect?appid=%s&redirect_uri=%s&response_type=%s&scope=%s&state=%s#wechat_redirect',
                $this->web['app_id'],
                urlencode($this->web['redirect']),
                'code',
                'snsapi_login',
                $state,
            );

            $data = [
                'state'  => $state,
                'qr_url' => $qrUrl
            ];
            return $data;
        } catch (\Throwable $th) {
            // var_dump($th->getFile().'|'.$th->getLine().'|'.$th->getMessage());
            throw new BusinessException('获取微信二维码失败');
        }
    }

    /**
     * 获取微信access_token
     */
    public function wechatWebAccessToken(string $code, string $state): array
    {
        try {
            // 校验 state
            $stateJson = Redis::get("wx:login:state:$state");
            if (!$stateJson) {
                throw new \RuntimeException('state 已过期或无效');
            }

            // 拼接地址
            $tokenUrl = sprintf(
                'https://api.weixin.qq.com/sns/oauth2/access_token?appid=%s&secret=%s&code=%s&grant_type=authorization_code', 
                $this->web['app_id'], 
                $this->web['app_secret'], 
                $code
            );
            
            // code 换 token
            $token = $this->httpGetJson($tokenUrl);
            if (!isset($token['access_token'], $token['openid'])) {
                throw new \RuntimeException('换取 access_token 失败：'. json_encode($token, JSON_UNESCAPED_UNICODE));
            }
            return $token;
        } catch (\Throwable $th) {
            throw new BusinessException('获取 access_token 失败');
        }
    }

    /**
     * 获取微信用户信息
     *
     * @param array $token
     * @return array
     */
    public function wechatWebUserInfo(array $accessToken): array
    {
        try {
            // 拉取用户信息
            return $this->httpGetJson(sprintf(
                'https://api.weixin.qq.com/sns/userinfo?access_token=%s&openid=%s',
                $accessToken['access_token'],
                $accessToken['openid']
            ));
        } catch (\Throwable $th) {
            // var_dump($th->getFile().'|'.$th->getLine().'|'.$th->getMessage());
            throw new BusinessException('获取用户信息失败');
        }
    }

    /**
     * tools - httpGetJson
     */
    protected function httpGetJson(string $url): array
    {
        $client = new Client([
            'verify' => false, // 禁用 SSL 验证
            'timeout' => 10,
        ]);
        $json = $client->get($url)->getBody()->getContents();
        return json_decode($json, true) ?: [];
    }


    //----------------------------小程序登录----------------------------------------

    /**
     * 获取 openid / session_key
     * @param $code
     * @return mixed
     */
    public function miniCode2Session($code)
    {
        $appid = $this->mini['app_id'];
        $secret = $this->mini['app_secret'];
        $url = "https://api.weixin.qq.com/sns/jscode2session?appid=$appid&secret=$secret&js_code=$code&grant_type=authorization_code";
        return json_decode(file_get_contents($url), true);
    }

    /**
     * 获取 access_token
     * @return mixed
     */
    public function getMiniAccessToken()
    {
        $appid = $this->mini['app_id'];
        $secret = $this->mini['app_secret'];
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$appid&secret=$secret";
        return json_decode(file_get_contents($url), true);
    }

    /**
     * 调用微信接口取手机号
     * @param $access_token
     * @param $phone_code
     * @return mixed
     */
    public function getMiniPhoneNumber($access_token, $phone_code)
    {
        $url = "https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token={$access_token}";

        $data = json_encode([
            'code' => $phone_code
        ]);

        $options = [
            'http' => [
                'header'  => "Content-type: application/json",
                'method'  => 'POST',
                'content' => $data,
            ],
        ];

        return json_decode(file_get_contents($url, false, stream_context_create($options)), true);
    }

    /**
     * 小程序获取openid
     * @param string $code
     * @return array
     * @throws BusinessException
     */
    public function xcxOpenid(string $code): array
    {

        $config = [
            'app_id' => getenv('WECHAT_MINI_APPID'),
            'secret' => getenv('WECHAT_MINI_SECRET'),
            'response_type' => 'array',
            'log' => [
                'level' => 'debug',
                'file' => runtime_path().'/mzl/wechat.log',
            ]
        ];
        // 创建微信小程序对象
        $wechat = new xcxApplication($config);
        // 获取 session_key 和 openid
        return $wechat->getUtils()->codeToSession($code);
    }

    /**
     * 小程序获取手机号
     * @param string $phone_code
     * @return mixed
     * @throws BusinessException
     */
    public function xcxPhoneNumber(string $phone_code)
    {
        $config = [
            'app_id' => getenv('WECHAT_MINI_APPID'),
            'secret' => getenv('WECHAT_MINI_SECRET'),
            'response_type' => 'array',
            'log' => [
                'level' => 'debug',
                'file' => runtime_path().'/mzl/wechat.log',
            ]
        ];
        // 创建微信小程序对象
        $wechat = new xcxApplication($config);
        // getPhoneNumber
        $data = ['code' => $phone_code];
        $result = $wechat->getClient()->postJson('wxa/business/getuserphonenumber', $data);
        if (isset($result['phone_info'])) {
            // 业务处理 $result['phone_info']['phoneNumber']
            return $result;
        } else {
            throw new BusinessException($result['errmsg']);
        }
    }
}