<?php

namespace Pcrt\Component\Circolari\Site\Model;

\defined('_JEXEC') or die;

use Joomla\CMS\MVC\Model\ItemModel;
use Joomla\CMS\Factory;
use Joomla\CMS\User\UserHelper;
use Joomla\CMS\Language\Text;

class CircolareModel extends ItemModel
{
    protected function populateState()
    {
        $app = Factory::getApplication();
        $id  = $app->input->getInt('id', 0);
        $this->setState('circolare.id', $id);

        $categoria_id = $app->input->getInt('categoria_id', 0);
        $this->setState('filter.categoria_id', $categoria_id);
        parent::populateState();
    }

    public function getItem($pk = null)
    {
        $pk = (int) ($pk ?: $this->getState('circolare.id'));

        if ($pk <= 0) {
            return null;
        }

        $db = $this->getDatabase();
        $q  = $db->getQuery(true)
            ->select('c.*')
            ->from($db->quoteName('#__circolari') . ' AS c')
            ->where('c.id = ' . (int) $pk);

        // Se esistono le colonne, applica filtri
        $cols = array_change_key_case(
            $db->getTableColumns($db->replacePrefix('#__circolari'), false),
            CASE_LOWER
        );

        // categoria_id (se impostato e colonna esiste)
        $categoria_id = (int) $this->getState('filter.categoria_id', 0);
        if ($categoria_id > 0 && isset($cols['categoria_id'])) {
            $q->where('c.categoria_id = ' . $categoria_id);
        }

        // stato (se colonna esiste)
        if (isset($cols['state'])) {
            $q->where('COALESCE(c.state, 1) = 1');
        }

        $db->setQuery($q);
        $row = $db->loadObject();

        return $row ?: null;
    }

    public function getBottoniFirma(int $firmatipoId): array
    {
        $buttons = []; // <- sempre inizializzato

        if ($firmatipoId <= 0) {
            return $buttons;
        }

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

        // 1) Tabella relazionale
        $q = $db->getQuery(true)
            ->select($db->quoteName(['id', 'label']))
            ->from($db->quoteName('#__circolari_firmetipi_bottoni'))
            ->where($db->quoteName('firmatipo_id') . ' = ' . (int) $firmatipoId)
            ->order($db->escape('ordering ASC, id ASC'));
        $db->setQuery($q);
        $buttons = (array) $db->loadObjectList();

        // 2) Fallback JSON
        if (!$buttons) {
            $q2 = $db->getQuery(true)
                ->select($db->quoteName('bottoni_firma'))
                ->from($db->quoteName('#__circolari_firmetipi'))
                ->where($db->quoteName('id') . ' = ' . (int) $firmatipoId);
            $db->setQuery($q2);
            $json = (string) $db->loadResult();

            if ($json) {
                $rows = json_decode($json, true) ?: [];
                foreach ($rows as $r) {
                    $label = trim((string) ($r['etichetta'] ?? ''));
                    if ($label !== '') {
                        $buttons[] = (object) ['id' => 0, 'label' => $label];
                    }
                }
            }
        }

        return $buttons;
    }

    public function userCanFirmare(int $circolareId, ?int $userId = null): bool
    {
        $user = Factory::getUser($userId);
        if ($user->guest) {
            return false;
        }

        // Gruppi (inclusa ereditarietà). In J4/J5 puoi usare UserHelper::getUserGroups
        $userGroups = array_map('intval', UserHelper::getUserGroups($user->id));
        if (!$userGroups) {
            return false;
        }

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

        $q = $db->getQuery(true)
            ->select('COUNT(*)')
            ->from($db->quoteName('#__circolari_usergroups'))
            ->where($db->quoteName('circolare_id') . ' = ' . (int) $circolareId)
            ->where($db->quoteName('usergroup_id') . ' IN (' . implode(',', $userGroups) . ')');

        $db->setQuery($q);
        return ((int) $db->loadResult()) > 0;
    }


    public function bottoneValidoPerCircolare(int $circolareId, int $bottoneId): bool
    {
        $db = Factory::getContainer()->get('DatabaseDriver');
        $q  = $db->getQuery(true)
            ->select('1')
            ->from($db->quoteName('#__circolari', 'c'))
            ->join('INNER', $db->quoteName('#__circolari_firmetipi_bottoni', 'b')
                . ' ON ' . $db->quoteName('b.firmatipo_id') . ' = ' . $db->quoteName('c.tipologia_firma_id'))
            ->where($db->quoteName('c.id') . ' = ' . (int) $circolareId)
            ->where($db->quoteName('b.id') . ' = ' . (int) $bottoneId);
        $db->setQuery($q, 0, 1);
        return (bool) $db->loadResult();
    }

    public function insertFirma(int $circolareId, int $userId, int $bottoneId): bool
    {
        $db  = Factory::getContainer()->get('DatabaseDriver');
        $now = Factory::getDate()->toSql();
        $ip  = $_SERVER['REMOTE_ADDR'] ?? '';

        $columns = ['circolare_id', 'user_id', 'firmatipo_bottone_id', 'signed_at', 'ip'];
        $values  = [
            (int) $circolareId,
            (int) $userId,
            (int) $bottoneId,
            $db->quote($now),
            $db->quote($ip)
        ];

        $q = $db->getQuery(true)
            ->insert($db->quoteName('#__circolari_firme'))
            ->columns($db->quoteName($columns))
            ->values(implode(',', $values));

        try {
            $db->setQuery($q)->execute();
        } catch (\RuntimeException $e) {
            // 1062 = duplicate key (violazione UNIQUE circolare_id+user_id)
            if ((int) $e->getCode() === 1062 || stripos($e->getMessage(), 'Duplicate') !== false) {
                throw new \RuntimeException(Text::_('COM_CIRCOLARI_ERR_ALREADY_SIGNED'), 409);
            }
            throw $e;
        }
        return true;
    }

    public function getFirmaUtente(int $circolareId, int $userId): ?object
    {
        if ($circolareId <= 0 || $userId <= 0) {
            return null;
        }
        $db = Factory::getContainer()->get('DatabaseDriver');

        // Schema compatibile con entrambe le versioni (ENUM "firma" oppure nuovo schema con firmatipo_bottone_id/firma_label)
        $q = $db->getQuery(true)
            ->select($db->quoteName(['id', 'circolare_id', 'user_id']))
            ->select('' . $db->quoteName('firmatipo_bottone_id') . ' AS firmatipo_bottone_id')
            ->select('' . $db->quoteName('firma_label') . ' AS firma_label')
            //->select('' . $db->quoteName('firma') . ' AS firma_enum')
            ->from($db->quoteName('#__circolari_firme'))
            ->where($db->quoteName('circolare_id') . ' = ' . (int)$circolareId)
            ->where($db->quoteName('user_id') . ' = ' . (int)$userId);
        $db->setQuery($q, 0, 1);
        $row = $db->loadObject();

        return $row ?: null;
    }

    public function getFirmeCircolare(int $circolareId): array
    {
        if ($circolareId <= 0) {
            return [];
        }

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

        // Rileva le colonne della tabella firme (schema nuovo vs enum)
        $cols = array_change_key_case($db->getTableColumns('#__circolari_firme', false));
        $hasBtn   = isset($cols['firmatipo_bottone_id']);
        $hasLabel = isset($cols['firma_label']);
        $hasEnum  = isset($cols['firma']);

        $q = $db->getQuery(true)
            ->select([
                'f.id',
                'f.circolare_id',
                'f.user_id',
                'f.data_firma',
                ($hasLabel ? 'f.firma_label' : 'NULL') . ' AS firma_label',
                ($hasEnum  ? 'f.firma'       : 'NULL') . ' AS firma_enum'
            ])
            ->from($db->quoteName('#__circolari_firme', 'f'))
            ->join('INNER', $db->quoteName('#__users', 'u') . ' ON u.id = f.user_id')
            ->select('u.name AS user_name, u.username, u.email')
            ->where('f.circolare_id = ' . (int) $circolareId)
            ->order('f.data_firma DESC');

        if ($hasBtn) {
            $q->select('b.label AS bottone_label')
                ->join('LEFT', $db->quoteName('#__circolari_firmetipi_bottoni', 'b') . ' ON b.id = f.firmatipo_bottone_id');
        } else {
            $q->select('NULL AS bottone_label');
        }

        $db->setQuery($q);
        $rows = (array) $db->loadAssocList();

        // Post-processing: normalizza la label scelta
        foreach ($rows as &$r) {
            $label = $r['firma_label'] ?: $r['bottone_label'] ?: $r['firma_enum'];
            if ($label && $label === $r['firma_enum']) {
                $label = ucwords(str_replace('_', ' ', $label)); // enum -> "Presa Visione"
            }
            $r['scelta_label'] = $label ?: '-';
        }
        unset($r);

        return $rows;
    }


    /**
     * Incrementa gli hits della circolare.
     */
    public function hit($pk = null)
    {
        $pk = $pk ?: (int) $this->getState($this->getName() . '.id');
        if (!$pk) {
            return false;
        }
        $db = $this->getDatabase();
        $query = $db->getQuery(true)
            ->update($db->quoteName('#__circolari'))
            ->set($db->quoteName('hits') . ' = ' . $db->quoteName('hits') . ' + 1')
            ->where($db->quoteName('id') . ' = ' . (int)$pk);
        $db->setQuery($query)->execute();
        return true;
    }
}