<?php

namespace App\Http\Middleware;

use Closure;

/**
 * 開啟或關閉debugbar並處理
 *
 * Class DebugbarEnabler
 * @package App\Http\Middleware
 */
class DebugbarEnabler
{
    /**
     * Cookie及Session存放的Key
     *
     * @var string
     */
    private $cookieAndSessionKey = '__debugbar_enabled';

    /**
     * 啟用/停用時的參數Key
     *
     * @var string
     */
    private $switchRequestKey = '__debugbar';
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {


        if(class_exists('\Debugbar') && config('app.debug')) {
            //要被回傳的Cookie
            $setDebugbarCookie = false;
            //切換Debugbar
            $enableDebugbar = false;
            //有切換的參數請求時
            if($request->get($this->switchRequestKey) !== null) {
                if($request->get($this->switchRequestKey) === 'enable') {
                    //參數為enable時設定Session與Cookie
                    $request->session()->put($this->cookieAndSessionKey, 1);
                    $enableDebugbar = $setDebugbarCookie = 1;
                } else {
                    //參數不為enable時設定Session與Cookie
                    $request->session()->forget($this->cookieAndSessionKey);
                    $enableDebugbar = $setDebugbarCookie = 0;
                }
            }
            //此次請求有切換Debugbar
            if($enableDebugbar !== false) {
                if($enableDebugbar == 1) {
                    \Debugbar::enable();
                } else {
                    \Debugbar::disable();
                }
            //此次請求沒有切換Debugbar
            } else {
                //如Cookie或Session有值則啟用Debugbar
                if($request->session()->get($this->cookieAndSessionKey) == 1 || $request->cookies->get($this->cookieAndSessionKey) == 1) {
                    \Debugbar::enable();
                } else {
                    \Debugbar::disable();
                }
            }
            //如有設定Cookie
            if($setDebugbarCookie !== false) {
                $cookie = null;
                if($setDebugbarCookie == 1) {
                    $cookie = cookie()->forever($this->cookieAndSessionKey, 1);
                } else {
                    $cookie = cookie()->forget($this->cookieAndSessionKey);
                }
                return $next($request)->withCookie($cookie);
            }
        }

        return $next($request);
    }
}