<?php

declare(strict_types=1);

use App\Controllers\CatalogController;
use App\Controllers\HomeController;
use App\Controllers\PageController;
use App\Controllers\PriceRequestController;
use App\Core\Router;
use App\Repositories\CategoryRepository;
use App\Repositories\ProductRepository;

require_once dirname(__DIR__) . '/app/bootstrap.php';

$router = new Router();

$catalogSearchHandler = static function (?string $rawQuery = null): void {
    $queryParameters = [];
    parse_str((string) (parse_url($_SERVER['REQUEST_URI'] ?? '', PHP_URL_QUERY) ?? ''), $queryParameters);

    $query = trim((string) ($rawQuery ?? $_GET['q'] ?? $queryParameters['q'] ?? ''));
    if ($query === '') {
        (new CatalogController())->index();
        return;
    }

    $_GET['q'] = $query;

    $perPage = 48;
    $limit = isset($_GET['limit']) ? max($perPage, min((int) $_GET['limit'], 5000)) : $perPage;
    $page = max(1, (int) ($_GET['page'] ?? 1));
    $offset = isset($_GET['limit']) ? 0 : (($page - 1) * $perPage);

    $categoryRepository = new CategoryRepository();
    $productRepository = new ProductRepository();

    if (method_exists($productRepository, 'searchCatalog')) {
        $searchResult = $productRepository->searchCatalog($query, $limit, $offset, true);
        $products = $searchResult['products'];
        $total = $searchResult['total'];
    } else {
        $allProducts = $productRepository->catalogPreview(5000, 0, true);
        $needle = function_exists('mb_strtolower') ? mb_strtolower($query, 'UTF-8') : strtolower($query);
        $words = array_values(array_filter(preg_split('/\s+/u', $needle) ?: []));

        $ranked = [];
        foreach ($allProducts as $product) {
            $haystack = implode(' ', [
                (string) ($product['name'] ?? ''),
                (string) ($product['short_description'] ?? ''),
                (string) ($product['category_name'] ?? ''),
                (string) ($product['display_category_name'] ?? ''),
                (string) ($product['categories_path'] ?? ''),
            ]);
            $haystack = function_exists('mb_strtolower') ? mb_strtolower($haystack, 'UTF-8') : strtolower($haystack);

            $score = 0;
            if ($needle !== '' && str_contains($haystack, $needle)) {
                $score += 100;
            }

            foreach ($words as $word) {
                if ($word !== '' && str_contains($haystack, $word)) {
                    $score += 20;
                }
            }

            if ($score > 0) {
                $product['_search_score'] = $score;
                $ranked[] = $product;
            }
        }

        usort($ranked, static fn (array $a, array $b): int => ($b['_search_score'] ?? 0) <=> ($a['_search_score'] ?? 0));

        $total = count($ranked);
        $products = array_slice($ranked, $offset, $limit);
    }

    $shown = min($total, $offset + count($products));
    $basePath = '/search/' . rawurlencode($query);

    view('catalog/index', [
        'title' => 'Поиск по каталогу Рыбсток - ' . $query,
        'metaDescription' => 'Результаты поиска по каталогу Рыбсток: ' . $query,
        'metaKeywords' => $query . ', Рыбсток, каталог продуктов',
        'breadcrumbs' => [
            ['title' => 'Главная', 'url' => '/'],
            ['title' => 'Каталог', 'url' => '/catalog'],
            ['title' => 'Поиск'],
        ],
        'categories' => $categoryRepository->tree(),
        'currentCategory' => null,
        'products' => $products,
        'searchQuery' => $query,
        'pagination' => [
            'base_path' => $basePath,
            'total' => $total,
            'shown' => $shown,
            'page' => $page,
            'pages' => max(1, (int) ceil($total / $perPage)),
            'per_page' => $perPage,
            'limit' => $limit,
            'has_more' => $shown < $total,
            'next_limit' => min($total, max($shown, $limit) + $perPage),
            'cumulative' => isset($_GET['limit']),
        ],
    ]);
};

$router->get('/', static fn () => (new HomeController())->index());
$router->post('/price-request', static fn () => (new PriceRequestController())->store());
$router->get('/search', static fn () => $catalogSearchHandler());
$router->get('/search/{query}', static fn (string $query) => $catalogSearchHandler($query));
$router->get('/catalog', static fn () => trim((string) ($_GET['q'] ?? '')) !== '' ? $catalogSearchHandler() : (new CatalogController())->index());
$router->get('/delivery', static fn () => (new PageController())->delivery());
$router->get('/payment', static fn () => (new PageController())->payment());
$router->get('/contacts', static fn () => (new PageController())->contacts());
$router->get('/returns', static fn () => (new PageController())->returns());
$router->get('/cart', static fn () => (new PageController())->cart());
$router->get('/product/{slug}', static fn (string $slug) => (new CatalogController())->product($slug));
$router->get('/catalog/{slug}', static fn (string $slug) => (new CatalogController())->category($slug));

$router->dispatch($_SERVER['REQUEST_METHOD'], $_SERVER['REQUEST_URI']);