<?php declare(strict_types=1);
namespace openvk\Web\Presenters;
use openvk\Web\Models\Repositories\{Gifts, Users};
use openvk\Web\Models\Entities\Notifications\GiftNotification;

final class GiftsPresenter extends OpenVKPresenter
{
    private $gifts;
    private $users;
    
    function __construct(Gifts $gifts, Users $users)
    {
        $this->gifts = $gifts;
        $this->users = $users;
    }
    
    function renderUserGifts(int $user): void
    {
        $this->assertUserLoggedIn();
        
        $user = $this->users->get($user);
        if(!$user)
            $this->notFound();
        
        $this->template->user     = $user;
        $this->template->page     = $page = (int) ($this->queryParam("p") ?? 1);
        $this->template->count    = $user->getGiftCount();
        $this->template->iterator = $user->getGifts($page);
        $this->template->hideInfo = $this->user->id !== $user->getId();
    }
    
    function renderGiftMenu(): void
    {
        $user = $this->users->get((int) ($this->queryParam("user") ?? 0));
        if(!$user)
            $this->notFound();
        
        $this->template->page = $page = (int) ($this->queryParam("p") ?? 1);
        $cats = $this->gifts->getCategories($page, NULL, $this->template->count);
        
        $this->template->user      = $user;
        $this->template->iterator  = $cats;
        $this->template->_template = "Gifts/Menu.xml";
    }
    
    function renderGiftList(): void
    {
        $user = $this->users->get((int) ($this->queryParam("user") ?? 0));
        $cat  = $this->gifts->getCat((int) ($this->queryParam("pack") ?? 0));
        if(!$user || !$cat)
            $this->flashFail("err", "Не удалось подарить", "Пользователь или набор не существуют.");
        
        $this->template->page = $page = (int) ($this->queryParam("p") ?? 1);
        $gifts = $cat->getGifts($page, null, $this->template->count);
        
        $this->template->user      = $user;
        $this->template->cat       = $cat;
        $this->template->gifts     = iterator_to_array($gifts);
        $this->template->_template = "Gifts/Pick.xml";
    }
    
    function renderConfirmGift(): void
    {
        $user = $this->users->get((int) ($this->queryParam("user") ?? 0));
        $gift = $this->gifts->get((int) ($this->queryParam("elid") ?? 0));
        $cat  = $this->gifts->getCat((int) ($this->queryParam("pack") ?? 0));
        if(!$user || !$cat || !$gift || !$cat->hasGift($gift))
            $this->flashFail("err", "Не удалось подарить", "Не удалось подтвердить права на подарок.");
        
        if(!$gift->canUse($this->user->identity))
            $this->flashFail("err", "Не удалось подарить", "У вас больше не осталось таких подарков.");
        
        $coinsLeft = $this->user->identity->getCoins() - $gift->getPrice();
        if($coinsLeft < 0)
            $this->flashFail("err", "Не удалось подарить", "Ору нищ не пук.");
        
        $this->template->_template = "Gifts/Confirm.xml";
        if($_SERVER["REQUEST_METHOD"] !== "POST") {
            $this->template->user = $user;
            $this->template->cat  = $cat;
            $this->template->gift = $gift;
            return;
        }
        
        $comment      = empty($c = $this->postParam("comment")) ? NULL : $c;
        $notification = new GiftNotification($user, $this->user->identity, $gift, $comment);
        $notification->emit();
        $this->user->identity->setCoins($coinsLeft);
        $user->gift($this->user->identity, $gift, $comment, !is_null($this->postParam("anonymous")));
        $gift->used();
        
        $this->flash("succ", "Подарок отправлен", "Вы отправили подарок <b>" . $user->getFirstName() . "</b> за " . $gift->getPrice() . " голосов.");
        $this->redirect($user->getURL(), static::REDIRECT_TEMPORARY);
    }
    
    function renderStub(): void
    {
        $this->assertUserLoggedIn();
        
        $act = $this->queryParam("act");
        switch($act) {
            case "pick":
                $this->renderGiftMenu();
                break;
            
            case "menu":
                $this->renderGiftList();
                break;
            
            case "confirm":
                $this->renderConfirmGift();
                break;
            
            default:
                $this->notFound();
        }
    }
    
    function renderGiftImage(int $id, int $timestamp): void
    {
        $gift = $this->gifts->get($id);
        if(!$gift)
            $this->notFound();
        
        $image = $gift->getImage();
        header("Cache-Control: no-transform, immutable");
        header("Content-Length: " . strlen($image));
        header("Content-Type: image/png");
        exit($image);
    }
}