<?php
/*
 * Copyright (c) 2025, Антон Аксенов
 * This file is part of iptv.axenov.dev web interface
 * MIT License: https://git.axenov.dev/IPTV/web/src/branch/master/LICENSE
 */

declare(strict_types=1);

namespace App\Controllers;

use App\Errors\PlaylistNotFoundException;
use Exception;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Throwable;
use Twig\Error\LoaderError;
use Twig\Error\RuntimeError;
use Twig\Error\SyntaxError;

/**
 * Контроллер маршрутов web
 */
class WebController extends BasicController
{
    /**
     * Возвращает главную страницу со списком плейлистов
     *
     * @param ServerRequestInterface $request
     * @param ResponseInterface $response
     * @return ResponseInterface
     * @throws LoaderError
     * @throws RuntimeError
     * @throws SyntaxError
     * @throws Exception
     */
    public function home(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
    {
        $playlists = ini()->getPlaylists();

        $count = count($playlists);
        $onlineCount = count(array_filter($playlists, static fn (array $playlist) => $playlist['isOnline'] === true));
        $uncheckedCount = count(array_filter($playlists, static fn (array $playlist) => $playlist['isOnline'] === null));
        $offlineCount = $count - $onlineCount - $uncheckedCount;

        $pageSize = config('app.page_size');
        if ($pageSize > 0) {
            $pageCurrent = (int)($request->getAttributes()['page'] ?? $request->getQueryParams()['page'] ?? 1);
            $pageCount = ceil($count / $pageSize);
            $offset = max(0, ($pageCurrent - 1) * $pageSize);
            $playlists = array_slice($playlists, $offset, $pageSize, true);
        }

        return $this->view($request, $response, 'list.twig', [
            'updatedAt' => ini()->updatedAt(),
            'playlists' => $playlists,
            'count' => $count,
            'onlineCount' => $onlineCount,
            'uncheckedCount' => $uncheckedCount,
            'offlineCount' => $offlineCount,
            'pageCount' => $pageCount ?? 1,
            'pageCurrent' => $pageCurrent ?? 1,
        ]);
    }

    /**
     * Возвращает страницу FAQ
     *
     * @param ServerRequestInterface $request
     * @param ResponseInterface $response
     * @return ResponseInterface
     * @throws LoaderError
     * @throws RuntimeError
     * @throws SyntaxError
     */
    public function faq(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
    {
        return $this->view($request, $response, 'faq.twig');
    }

    /**
     * Переадресует запрос на прямую ссылку плейлиста
     *
     * @param ServerRequestInterface $request
     * @param ResponseInterface $response
     * @return ResponseInterface
     * @throws LoaderError
     * @throws RuntimeError
     * @throws SyntaxError
     */
    public function redirect(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
    {
        $code = $request->getAttributes()['code'];

        try {
            $playlist = ini()->getPlaylist($code);
            return $response->withHeader('Location', $playlist['url']);
        } catch (Throwable) {
            return $this->notFound($request, $response);
        }
    }

    /**
     * Возвращает страницу с описанием плейлиста
     *
     * @param ServerRequestInterface $request
     * @param ResponseInterface $response
     * @return ResponseInterface
     * @throws LoaderError
     * @throws RuntimeError
     * @throws SyntaxError
     */
    public function details(ServerRequestInterface $request, ResponseInterface $response): ResponseInterface
    {
        $code = $request->getAttributes()['code'];

        try {
            $playlist = ini()->getPlaylist($code);
            return $this->view($request, $response, 'details.twig', ['playlist' => $playlist]);
        } catch (PlaylistNotFoundException) {
            return $this->notFound($request, $response);
        }
    }
}