<?php
require_once('Models/FacilityDataSet.php');
require_once("Models/Paginator.php");
// If page loads empty, set initial headers
//if(empty($_GET)) {
//    header("Location: ?sort=1&dir=asc&category=1&term=&page=0");
//    exit;
//}

$filters = [
    'category' => $_GET['category'] ?? '1', // Default category
    'term' => $_GET['term'] ?? '', // Default term
    'sort' => $_GET['sort'] ?? '1', // Default sort
    'dir' => $_GET['dir'] ?? 'asc', // Default direction
    'page' => $_GET['page'] ?? 0 // Default to first page
];

// If no query parameters exist (initial page load), redirect to set default ones
if (empty($_GET)) {
    redirectWithFilters($filters);
}

$rowLimit = 5;
$facilityDataSet = new FacilityDataSet();

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    // Check if filters/sorting changed
    $filtersChanged = (
        $filters['category'] !== ($_POST['filterCat'] ?? $filters['category']) ||
        $filters['term'] !== ($_POST['filter'] ?? $filters['term']) ||
        $filters['sort'] !== ($_POST['sort'] ?? $filters['sort']) ||
        $filters['dir'] !== ($_POST['dir'] ?? $filters['dir'])
    );

    $filters['category'] = filter_input(INPUT_POST, 'filterCat', FILTER_SANITIZE_FULL_SPECIAL_CHARS) ?? $filters['category'];
    $filters['term'] = filter_input(INPUT_POST, 'filter', FILTER_SANITIZE_FULL_SPECIAL_CHARS) ?? $filters['term'];
    $filters['sort'] = filter_input(INPUT_POST, 'sort', FILTER_SANITIZE_FULL_SPECIAL_CHARS) ?? $filters['sort'];
    $filters['dir'] = filter_input(INPUT_POST, 'dir', FILTER_SANITIZE_FULL_SPECIAL_CHARS) ?? $filters['dir'];

    // Reset page if filters changed
    $filters['page'] = $filtersChanged ? 0 : $_POST['paginationButton'] ?? $filters['page'];
    redirectWithFilters($filters);
}

$view->pageData = $facilityDataSet->fetchAll(
    ['category' => $filters['category'], 'term' => $filters['term']],
    ['sort' => $filters['sort'], 'dir' => $filters['dir']]
);

$view->paginator = new Paginator($rowLimit, $view->pageData);
$view->pageNumber = $view->paginator->getPageFromUri();
$view->pageData = $view->paginator->getPage($view->pageNumber);

// Send result count to view
$view->dbMessage = $view->paginator->countPageResults($view->pageNumber) == 0
    ? "No results"
    : $view->paginator->countPageResults($view->pageNumber) . " result(s)";

// Redirect function
function redirectWithFilters($filters) {
    $queryString = http_build_query($filters);
    header("Location: ?" . $queryString);
    exit;
}