<?php
require_once('Models/FacilityDataSet.php');
require_once("Models/Paginator.php");

// Default Filters
$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);
}

// Set row limit
$rowLimit = 7;
// create dataset object
$facilityDataSet = new FacilityDataSet();

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    /**
     * Unfortunately, ZERO time to fix this, too complex.
     */
    if(isset($_POST['updateButton'])) {
        $data = [
            'id' => $_POST['idUpdate'],
            'title' => $_POST['titlUpdate'],
            'category' => $_POST['cateUpdate'],
            'description' => $_POST['descUpdate'],
            'houseNumber' => $_POST['hnumUpdate'],
            'streetName' => $_POST['strtUpdate'],
            'county' => $_POST['cntyUpdate'],
            'town' => $_POST['townUpdate'],
            'postcode' => $_POST['postUpdate'],
            'lng' => $_POST['lngUpdate'],
            'lat' => $_POST['latUpdate'],
            'contributor' => $_POST['contUpdate'],
        ];
        $facilityDataSet->addFacility($data);
    }
    if(isset($_POST['createButton'])) {
        $data = [
            'title' => $_POST['titlCreate'],
            'category' => $_POST['cateCreate'],
            'description' => $_POST['descCreate'],
            'houseNumber' => $_POST['hnumCreate'],
            'streetName' => $_POST['strtCreate'],
            'county' => $_POST['cntyCreate'],
            'town' => $_POST['townCreate'],
            'postcode' => $_POST['postCreate'],
            'contributor' => $_POST['contCreate'],
        ];
        $facilityDataSet->addFacility($data);
    }
    // passes id to delete facility
    if (isset($_POST['deleteButton'])) {
        $facilityDataSet->deleteFacility($_POST['id']);
    }
    // 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'])
    );

    // load from post if exists and sanitise, otherwise use defaults
    $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);
}

// fetch page data from database
$view->allPageData = $facilityDataSet->fetchAll(
    ['category' => $filters['category'], 'term' => $filters['term']],
    ['sort' => $filters['sort'], 'dir' => $filters['dir']]
);

// set total facility count to view
$view->totalResults = $view->allPageData['count'];
// create paginator object
$view->paginator = new Paginator($rowLimit, $view->allPageData);
// assign page number to view
$view->pageNumber = $view->paginator->getPageFromUri();
// get current page
$view->pageData = $view->paginator->getPage($view->pageNumber);
// Send result count to view in format "showing x of y results"
$view->dbMessage = $view->paginator->countPageResults($view->pageNumber) == 0
    ? "No results"
    : "Showing " . $view->paginator->countPageResults($view->pageNumber) . " of " . $view->totalResults .  " result(s)";

// Redirect function, adds header parameters
function redirectWithFilters($filters) {
    // Ensure no unintended keys are passed
    $allowedKeys = ['category', 'term', 'sort', 'dir', 'page'];
    $filters = array_filter($filters, function($key) use ($allowedKeys) {
        return in_array($key, $allowedKeys);
    }, ARRAY_FILTER_USE_KEY);

    $queryString = http_build_query($filters);
    header("Location: ?" . $queryString);
    exit;
}