<?php

class Article
{
    private static $pdo = null;

    private static function db()
    {
        if (self::$pdo === null) {
            self::$pdo = new MysqlPdo(hst, ndb, user, pass);
            self::$pdo->query("SET NAMES 'utf8mb4'");
        }
        return self::$pdo;
    }

    public static function getAll()
    {
        $pdo = self::db();
        $stmt = $pdo->query("SELECT id, slug, title, date_created, date_updated, image, published, sort_order FROM articles ORDER BY sort_order DESC, id DESC");
        return $pdo->result_pdo($stmt);
    }

    public static function getPublished()
    {
        $pdo = self::db();
        $stmt = $pdo->query("SELECT id, slug, title, description, date_created, image FROM articles WHERE published = 1 ORDER BY sort_order DESC, id DESC");
        return $pdo->result_pdo($stmt);
    }

    public static function getById($id)
    {
        $pdo = self::db();
        $stmt = $pdo->queryNamed("SELECT * FROM articles WHERE id = :id LIMIT 1", array(':id' => (int)$id));
        $row = $pdo->fetch_assoc($stmt);
        return $row ? $row : null;
    }

    public static function getBySlug($slug)
    {
        $pdo = self::db();
        $stmt = $pdo->queryNamed("SELECT * FROM articles WHERE slug = :slug AND published = 1 LIMIT 1", array(':slug' => $slug));
        $row = $pdo->fetch_assoc($stmt);
        return $row ? $row : null;
    }

    public static function create($data)
    {
        $pdo = self::db();
        $pdo->queryNamed(
            "INSERT INTO articles (slug, title, page_title, description, content, date_created, date_updated, reading_time, image, author_name, author_img, author_job, published, sort_order)
             VALUES (:slug, :title, :page_title, :description, :content, :date_created, :date_updated, :reading_time, :image, :author_name, :author_img, :author_job, :published, :sort_order)",
            array(
                ':slug'         => $data['slug'],
                ':title'        => $data['title'],
                ':page_title'   => $data['page_title'],
                ':description'  => isset($data['description']) ? $data['description'] : '',
                ':content'      => $data['content'],
                ':date_created' => $data['date_created'],
                ':date_updated' => $data['date_updated'],
                ':reading_time' => (int)$data['reading_time'],
                ':image'        => $data['image'],
                ':author_name'  => $data['author_name'],
                ':author_img'   => $data['author_img'],
                ':author_job'   => $data['author_job'],
                ':published'    => (int)$data['published'],
                ':sort_order'   => (int)$data['sort_order'],
            )
        );
        return (int)$pdo->insert_id();
    }

    public static function update($id, $data)
    {
        $pdo = self::db();
        $pdo->queryNamed(
            "UPDATE articles SET slug = :slug, title = :title, page_title = :page_title, description = :description, content = :content,
             date_created = :date_created, date_updated = :date_updated, reading_time = :reading_time,
             image = :image, author_name = :author_name, author_img = :author_img, author_job = :author_job,
             published = :published, sort_order = :sort_order
             WHERE id = :id",
            array(
                ':id'           => (int)$id,
                ':slug'         => $data['slug'],
                ':title'        => $data['title'],
                ':page_title'   => $data['page_title'],
                ':description'  => isset($data['description']) ? $data['description'] : '',
                ':content'      => $data['content'],
                ':date_created' => $data['date_created'],
                ':date_updated' => $data['date_updated'],
                ':reading_time' => (int)$data['reading_time'],
                ':image'        => $data['image'],
                ':author_name'  => $data['author_name'],
                ':author_img'   => $data['author_img'],
                ':author_job'   => $data['author_job'],
                ':published'    => (int)$data['published'],
                ':sort_order'   => (int)$data['sort_order'],
            )
        );
    }

    public static function delete($id)
    {
        $pdo = self::db();
        $pdo->queryNamed("DELETE FROM articles WHERE id = :id", array(':id' => (int)$id));
    }

    public static function slugExists($slug, $excludeId = 0)
    {
        $pdo = self::db();
        $stmt = $pdo->queryNamed(
            "SELECT id FROM articles WHERE slug = :slug AND id != :exclude_id LIMIT 1",
            array(':slug' => $slug, ':exclude_id' => (int)$excludeId)
        );
        return (bool)$pdo->fetch_assoc($stmt);
    }

    public static function makeSlug($title)
    {
        $title = mb_strtolower($title, 'UTF-8');
        $cyr = array('а','б','в','г','д','е','ё','ж','з','и','й','к','л','м','н','о','п','р','с','т','у','ф','х','ц','ч','ш','щ','ъ','ы','ь','э','ю','я');
        $lat = array('a','b','v','g','d','e','yo','zh','z','i','j','k','l','m','n','o','p','r','s','t','u','f','h','cz','ch','sh','shh','','y','','e','yu','ya');
        $title = str_replace($cyr, $lat, $title);
        $title = preg_replace('/[^a-z0-9\s-]/', '', $title);
        $title = preg_replace('/[\s-]+/', '-', trim($title));
        $title = trim($title, '-');
        if ($title === '') {
            $title = 'article-' . time();
        }
        return $title;
    }

    public static function isSlugConflictingWithFile($slug)
    {
        $path = $_SERVER['DOCUMENT_ROOT'] . '/' . $slug . '.php';
        return file_exists($path);
    }

    public static function val($arr, $key, $default = '')
    {
        return (is_array($arr) && isset($arr[$key])) ? $arr[$key] : $default;
    }

    /**
     * Регенерирует sitemap.xml — берёт статичные публичные страницы + опубликованные статьи из БД.
     * Вызывается автоматически при сохранении/удалении статьи в админке.
     */
    public static function regenerateSitemap()
    {
        $staticUrls = array(
            '/', '/agent.php', '/blog.php', '/tariff.php', '/reviews.php',
            '/company.php', '/contacts.php', '/katalog-novostroek.php',
            '/dlja-stroitelnoj-kompanii.php', '/srm-sistema-dlja-zastrojshhika.php',
        );

        $articles = self::getPublished();
        $today = date('Y-m-d\TH:i:sP');

        $xml  = '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
        $xml .= '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' . "\n";

        foreach ($staticUrls as $url) {
            $xml .= '  <url><loc>https://joywork.ru' . $url . '</loc>'
                  . '<lastmod>' . $today . '</lastmod>'
                  . '<changefreq>monthly</changefreq>'
                  . '<priority>1</priority></url>' . "\n";
        }

        foreach ($articles as $a) {
            $lastmod = !empty($a['date_created']) ? date('Y-m-d\TH:i:sP', strtotime($a['date_created'])) : $today;
            $xml .= '  <url><loc>https://joywork.ru/' . htmlspecialchars($a['slug']) . '.php</loc>'
                  . '<lastmod>' . $lastmod . '</lastmod>'
                  . '<changefreq>monthly</changefreq>'
                  . '<priority>0.9</priority></url>' . "\n";
        }

        $xml .= '</urlset>' . "\n";

        $path = $_SERVER['DOCUMENT_ROOT'] . '/sitemap.xml';
        @file_put_contents($path, $xml);
    }
}