<?php
namespace Pcrt\Component\Circolari\Site\Service;

\defined('_JEXEC') or die;

use Joomla\CMS\Application\SiteApplication;
use Joomla\CMS\Menu\AbstractMenu;
use Joomla\CMS\Factory;
use Joomla\CMS\Component\Router\RouterView;
use Joomla\CMS\Component\Router\RouterViewConfiguration;
use Joomla\CMS\Component\Router\Rules\StandardRules;
use Joomla\CMS\Component\Router\Rules\MenuRules;
use Joomla\CMS\Component\Router\Rules\NomenuRules;

class Router extends RouterView
{
    public function __construct(SiteApplication $app, AbstractMenu $menu)
    {
        // Parent: category (annidata → più segmenti)
        $category = new RouterViewConfiguration('category');
        $category->setKey('id')->setNestable();
        $this->registerView($category);

        // Child: circolare (lega la category tramite categoria_id)
        $circolare = new RouterViewConfiguration('circolari');
        $circolare->setKey('id')->setParent($category, 'categoria_id', 'id');
        $this->registerView($circolare);

        parent::__construct($app, $menu);

        // Regole standard di routing
        $this->attachRule(new StandardRules($this));
        $this->attachRule(new MenuRules($this));
        $this->attachRule(new NomenuRules($this));
    }

    /* ---------------- BUILD ---------------- */

    // Segmenti categoria = path completo (parent1/parent2/figlia)
    public function getCategorySegment($id, $query)
    {
        $id = (int) ($id ?: 0);
        if ($id <= 0) {
            return [];
        }

        $db   = Factory::getContainer()->get('DatabaseDriver');
        $path = (string) $db->setQuery(
            $db->getQuery(true)
               ->select('path')
               ->from('#__circolari_categorie')
               ->where('id = ' . $id)
               ->where("extension = 'com_content'")
        )->loadResult();

        return $path !== '' ? array_filter(explode('/', $path)) : [(string) $id];
    }

    // Ultimo segmento = SOLO alias della circolare
    public function getCircolareSegment($id, $query)
    {
        $db    = Factory::getContainer()->get('DatabaseDriver');
        $alias = (string) $db->setQuery(
            $db->getQuery(true)
               ->select('alias')
               ->from('#__circolari')
               ->where('id = ' . (int) $id)
        )->loadResult();

        // Nessun fallback numerico: imponiamo l'alias
        return [$alias];
    }

    /* ---------------- PARSE ---------------- */

    // Ricava categoria_id accumulando i segmenti e risolvendo per PATH completo
    public function getCategoryId($segment, $query)
    {
        static $segments = [];
        $segments[] = $segment;
        $path = implode('/', $segments);

        $db = Factory::getContainer()->get('DatabaseDriver');

        // match per path (univoco in com_content)
        $id = (int) $db->setQuery(
            $db->getQuery(true)
               ->select('id')
               ->from('#__circolari_categorie')
               ->where('path = ' . $db->quote($path))
               ->where("extension = 'com_content'")
        )->loadResult();

        if ($id > 0) {
            return $id;
        }

        // fallback (singolo alias) se si visita direttamente un livello intermedio
        $id = (int) $db->setQuery(
            $db->getQuery(true)
               ->select('id')
               ->from('#__circolari_categorie')
               ->where('alias = ' . $db->quote($segment))
               ->where("extension = 'com_content'")
               ->order('level DESC')
        )->loadResult();

        return $id ?: 0;
    }

    // Alias circolare (+ categoria_id già risolto) → id
    public function getCircolareId($segment, $query)
    {
        $categoria_id = (int) ($query['categoria_id'] ?? 0);

        $db = Factory::getContainer()->get('DatabaseDriver');
        $q  = $db->getQuery(true)
                 ->select('id')
                 ->from('#__circolari')
                 ->where('alias = ' . $db->quote($segment));

        if ($categoria_id > 0) {
            $q->where('categoria_id = ' . $categoria_id);
        }

        $db->setQuery($q);

        return (int) $db->loadResult() ?: 0;
    }
}