<?php

namespace Model;

use SimpleValidator\Validator;
use SimpleValidator\Validators;
use Core\Translator;
use Core\Security;

/**
 * Config model
 *
 * @package  model
 * @author   Frederic Guillot
 */
class Config extends Base
{
    /**
     * SQL table name
     *
     * @var string
     */
    const TABLE = 'config';

    /**
     * Get available timezones
     *
     * @access public
     * @return array
     */
    public function getTimezones()
    {
        $timezones = timezone_identifiers_list();
        return array_combine(array_values($timezones), $timezones);
    }

    /**
     * Get available languages
     *
     * @access public
     * @return array
     */
    public function getLanguages()
    {
        $languages = array(
            'de_DE' => t('German'),
            'en_US' => t('English'),
            'es_ES' => t('Spanish'),
            'fr_FR' => t('French'),
            'pl_PL' => t('Polish'),
            'pt_BR' => t('Portuguese (Brazilian)'),
            'sv_SE' => t('Swedish'),
            'zh_CN' => t('Chinese (Simplified)'),
        );

        asort($languages);

        return $languages;
    }

    /**
     * Get a config variable from the session or the database
     *
     * @access public
     * @param  string   $name            Parameter name
     * @param  string   $default_value   Default value of the parameter
     * @return string
     */
    public function get($name, $default_value = '')
    {
        if (! isset($_SESSION['config'][$name])) {
            $_SESSION['config'] = $this->getAll();
        }

        if (isset($_SESSION['config'][$name])) {
            return $_SESSION['config'][$name];
        }

        return $default_value;
    }

    /**
     * Get all settings
     *
     * @access public
     * @return array
     */
    public function getAll()
    {
        return $this->db->table(self::TABLE)->findOne();
    }

    /**
     * Save settings in the database
     *
     * @access public
     * @param  $values  array   Settings values
     * @return boolean
     */
    public function save(array $values)
    {
        $_SESSION['config'] = $values;
        return $this->db->table(self::TABLE)->update($values);
    }

    /**
     * Reload settings in the session and the translations
     *
     * @access public
     */
    public function reload()
    {
        $_SESSION['config'] = $this->getAll();
        Translator::load($this->get('language', 'en_US'));
    }

    /**
     * Validate settings modification
     *
     * @access public
     * @param  array    $values           Form values
     * @return array    $valid, $errors   [0] = Success or not, [1] = List of errors
     */
    public function validateModification(array $values)
    {
        $v = new Validator($values, array(
            new Validators\Required('language', t('The language is required')),
            new Validators\Required('timezone', t('The timezone is required')),
        ));

        return array(
            $v->execute(),
            $v->getErrors()
        );
    }

    /**
     * Optimize the Sqlite database
     *
     * @access public
     * @return boolean
     */
    public function optimizeDatabase()
    {
        return $this->db->getconnection()->exec("VACUUM");
    }

    /**
     * Compress the Sqlite database
     *
     * @access public
     * @return string
     */
    public function downloadDatabase()
    {
        return gzencode(file_get_contents(DB_FILENAME));
    }

    /**
     * Get the Sqlite database size in bytes
     *
     * @access public
     * @return integer
     */
    public function getDatabaseSize()
    {
        return DB_DRIVER === 'sqlite' ? filesize(DB_FILENAME) : 0;
    }

    /**
     * Regenerate all tokens (projects and webhooks)
     *
     * @access public
     */
    public function regenerateTokens()
    {
        $this->db->table(self::TABLE)->update(array('webhooks_token' => Security::generateToken()));

        $projects = $this->db->table(Project::TABLE)->findAllByColumn('id');

        foreach ($projects as $project_id) {
            $this->db->table(Project::TABLE)->eq('id', $project_id)->update(array('token' => Security::generateToken()));
        }
    }
}