<?php

namespace App\Http\Middleware;

use App\Models\Server\MerchantUser;
use Closure;
use http\Env\Request;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Redis;
use Illuminate\Support\Str;
use Overtrue\LaravelWeChat\Events\WeChatUserAuthorized;

class EasyWechatOAuthMiddleware
{

    private $cacheKey = "saas:wechat:oauth:%s";

    /**
     * Handle an incoming request.
     *
     * @param \Illuminate\Http\Request $request
     * @param \Closure                 $next
     * @param string|null              $scopes
     * @return mixed
     */
    public function handle($request, Closure $next, $account = 'default', $scopes = null)
    {
        Log::info("EasyWechatOAuthMiddleware");
        // $account 与 $scopes 写反的情况
        if (is_array($scopes) || (\is_string($account) && Str::is('snsapi_*', $account))) {
            list($account, $scopes) = [$scopes, $account];
            $account || $account = 'default';
        }

        $isNewSession = false;
        $sessionKey = \sprintf('wechat.oauth_user.%s', $account);
        $config = config(\sprintf('wechat.official_account.%s', $account), []);
        $officialAccount = app(\sprintf('wechat.official_account.%s', $account));
        $scopes = $scopes ?: Arr::get($config, 'oauth.scopes', ['snsapi_base']);

        if (is_string($scopes)) {
            $scopes = array_map('trim', explode(',', $scopes));
        }

        $session = session($sessionKey, []);
        $isAuth = false;
        if ($session) {
            $openid = $session->getId() ?? '';
            $isAuth = Redis::get(printf($this->cacheKey, $openid));
        }

        if (!$session || !$isAuth) {
            if ($request->has('code')) {
                $user = $officialAccount->oauth->user() ?? [];
                //更新用户数据
                $this->saveUser($user);

                session([$sessionKey => $user]);
                $isNewSession = true;

                event(new WeChatUserAuthorized(session($sessionKey), $isNewSession, $account));

                return redirect()->to($this->getTargetUrl($request));
            }

            session()->forget($sessionKey);

            return $officialAccount->oauth->scopes($scopes)->redirect($request->fullUrl());
        }

        event(new WeChatUserAuthorized(session($sessionKey), $isNewSession, $account));

        return $next($request);
    }

    private function saveUser($user)
    {
        if (!$user) {
            return;
        }
        $user = $user->getOriginal();
        Log::info($user);
        $openid = $user['openid'] ?? '';
        $nickname = $user['nickname'] ?? '';
        $pic = $user['headimgurl'] ?? '';
        $unionid = $user['unionid'] ?? '';

        if (!($openid && strlen($nickname) > 0 && $pic && $unionid)) {
            return;
        }

        $merchant_user = MerchantUser::where('openid', $openid)->first();
        if (!$merchant_user) {
            $merchant_user = new MerchantUser;
            $merchant_user->openid = $openid;
        }
        $merchant_user->nickname = $nickname;
        $merchant_user->pic = $pic;
        $merchant_user->authorize_at = date('Y-m-d H:i:s');

        $has = MerchantUser::where('unionid', $unionid)->count();
        if (!$has) {
            $merchant_user->unionid = $unionid;
        }

        $merchant_user->save();
        Redis::setex(printf($this->cacheKey, $openid), 60, 1);

    }

    /**
     * Build the target business url.
     *
     * @param Request $request
     *
     * @return string
     */
    protected function getTargetUrl($request)
    {
        $queries = Arr::except($request->query(), ['code', 'state']);

        return $request->url() . (empty($queries) ? '' : '?' . http_build_query($queries));
    }
}