<?php

namespace App\Http\Controllers;

use App\Event;
use App\News;
use App\Notification;
use App\UserEvent;
use App\User;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\DB;

date_default_timezone_set('Europe/Copenhagen');

class EventController extends Controller
{
    public function __construct()
    {
        $this->middleware([ "auth" ]);
        $this->middleware([ "lang" ]);

        $this->middleware([ "check.auth:event.show" ])->only("show", "index");
        $this->middleware([ "check.auth:event.create" ])->only("create", "store");
        $this->middleware([ "check.auth:event.edit" ])->only("edit", "update");
        $this->middleware([ "check.auth:event.delete" ])->only("delete");
    }

    /**
     * Display a listing of the resource..
     *
     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function index(Request $request)
    {
        $events = Event::query()->orderBY('date' , 'asc')->get();

        //returns the function with events index page and a parameter of events.
        //also Response::detect checks screen size to determine if user is on a computer or mobile.
        return Response::detect("events.index", [ "events" => $events]);
    }

    /**
     * Show the form for creating a new resource.
     *
     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function create()
    {
        //returns "create event" blade
        return Response::detect("events.create");
    }

    /**
     * Store a newly created resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Illuminate\Http\RedirectResponse
     */
    public function store(Request $request)
    {
        $requestBody = $request->validate([
            "name" => "required|max:255",
            "accountable" => "required|max:255",
            "description" => "required",
            "date" => "required"
        ]);

        //creates a new Event model with the given parameter
        $event = new Event($requestBody);

        $allEvents = Event::query()->where('name', '=', $request->name)->get();

        if(count($allEvents) > 0) {
            return redirect()->route("events.index", ['events' => $event]);
        } else {
            if($request->file("resource")) {
                $event->resource_id = ResourceController::store($request)->id;
            }

            $event->save();
            $events = Event::query()->get();

            if($request->newsoption == true){
                $news = new News();

                $news->name = "Ny aktivitet";
                $news->subname = $event->name;
                $news->arrangement_id = $event->id;
                $news->type_id = '3';
                $news->content = $event->description;
                $news->resource_id = $event->resource_id;

                NewsController::storeAndGet($news);
            }

            return redirect()->route('events.index', ['events' => $events]);
        }
    }

    /**
     * Display the specified resource.
     *
     * @param Event $id
     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function show($id)
    {
        $event = Event::query()->where("id", "=", $id)->first();
        return Response::detect("events.show", [ "event" => $event ]);
    }

    /**
     * Display signups for event.
     *
     * @param  int  $id
     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function signups(Request $request)
    {
        // Find every event you have clicked on. And find all users to that event, and the event name itself.
        $events = UserEvent::join('users', 'users.id', '=', 'user_events.user_id')->join('events', 'events.id', '=', 'user_events.event_id')->where('event_id', $request->event)->get();

        if (count($events) == 0)
            $events = Event::where('id', $request->event)->get();

        return Response::detect("events.signups", [ "events" => $events ]);
    }

    /**
     * Display signups for event.
     *
     * @param  int  $id
     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function accountsignups(Request $request)
    {
        // Find every event you have clicked on. And find all users to that event, and the event name itself. - This is only being showed on App
        $events = UserEvent::join('users', 'users.id', '=', 'user_events.user_id')->join('events', 'events.id', '=', 'user_events.event_id')->where('event_id', $request->event)->get();

        return Response::detect("events.signups", [ "events" => $events ]);
    }

    /**
     * Show the form for editing the specified resource.-
     *
     * @param  int  $id
     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function edit($id)
    {
        $event = Event::find($id);
        return Response::detect("events.edit", [ "event" => $event ]);
    }

    /**
     * Update the specified resource in storage.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  int  $id
     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
     */
    public function update(Request $request, $id)
    {

        $data = $request->all();

        $event = Event::find($id);

        $allEvents = Event::query()->where('name', '=', $request->name)->where('id', '!=', $id)->get();

        if(count($allEvents) > 0){
            return redirect()->route("events.index", ['events' => $event]);
        }else{
            $event->update($data);

            if($request->file("resource")) {
                $event->resource_id = ResourceController::store($request)->id;
            }

            $event->save();

            $events = Event::query()->get();

            if($request->newsoption == true){
                $news = new News();

                $news->name = "Aktivitet opdateret";
                $news->subname = $event->name;
                $news->arrangement_id = $event->id;
                $news->type_id = '3';
                $news->resource_id = $event->resource_id;
                $news->content = "<p>" . $this->closetags(substr($event->description, 0, 300));


                NewsController::storeAndGet($news);
            }

            return redirect()->route("events.index", ['events' => $events]);
        }

    }

    /**
     * Remove the specified resource from storage.
     *
     * @param Event $id
     * @return \Illuminate\Contracts\Foundation\Application|\Illuminate\Contracts\View\Factory|\Illuminate\View\View
     * @throws \Exception
     */
    public function destroy(Request $request, $id)
    {
        if ($request->signup != null) { // If input signup is not empty, which has been set when you look at the individuel signup, then delete the user who have signed up for the event
            $UserEvent = UserEvent::query()->where('user_id', "=", $request->signup)->where('event_id', "=", $id);

            $UserEvent->delete();

            return redirect()->route("events.signups", [ "event" => $id ]);
        } else { // Else if you are deleting an event. Then delete all the sign ups AND the event
            $userEvents = UserEvent::query()->where('event_id', "=", $id)->get();
            $event = Event::query()->find($id);

            foreach ($userEvents as $userEvent) {
                $notification = new Notification();

                $notification->user_id = $userEvent->user_id;
                $notification->message = $event->name . " - ";
                $notification->save();
                $userEvent->delete();
            }

            $news = News::query()->join('news_types', 'news_types.id', '=', 'news.type_id')->where("type", "=", "Activity")->where("arrangement_id", "=", $id);
            $news->delete();

            $event->delete();

            return redirect()->route("events.index");
        }
    }

    //Fixes tags that have been substringed
    public function closetags($html) {
        preg_match_all('#<(?!meta|img|br|hr|input\b)\b([a-z]+)(?: .*)?(?<![/|/ ])>#iU', $html, $result);
        $openedtags = $result[1];
        preg_match_all('#</([a-z]+)>#iU', $html, $result);
        $closedtags = $result[1];
        $len_opened = count($openedtags);
        if (count($closedtags) == $len_opened) {
            return $html;
        }
        $openedtags = array_reverse($openedtags);
        for ($i=0; $i < $len_opened; $i++) {
            if (!in_array($openedtags[$i], $closedtags)) {
                $html .= '</'.$openedtags[$i].'>';
            } else {
                unset($closedtags[array_search($openedtags[$i], $closedtags)]);
            }
        }
        return $html;
    }

    public function deleteNotifications(Request $request){
        if($request->ajax()){
            foreach (Notification::query()->where("user_id", "=", $request->user_id)->get() as $notification) {
                $notification->delete();
            }
            return "Done";
        } else {
            return "ERROR";
        }
    }

    //Used for checking if the currently typed event name is unique. Create version
    public function nameCheck(Request $request){
        $event = Event::query()->where('name', 'LIKE',$request->nameCheck)->get();
        if(count($event) > 0 && $request->nameCheck !== NULL){
            return 1;
        }
    }

    //Used for checking if the currently typed event name is unique. Edit version
    public function nameCheckUpdate(Request $request){
        $event = Event::query()->where('name', 'LIKE',$request->nameCheck)->where('id', '!=', $request->id)->get();
        if(count($event) > 0 && $request->nameCheck !== NULL){
            return 1;
        }
    }

    public function previewPages(Request $request){
        $event = Event::find($request->preview);
        $convertToJsonArray = json_encode($event);
        return $convertToJsonArray;
    }

}