<?php
/**
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program (see LICENSE.txt in the base directory.  If
 * not, see:
 *
 * @link <http://www.gnu.org/licenses/>.
 * @author niel
 * @copyright 2014 nZEDb
 */

namespace nntmux\db\populate;

use nntmux\db\DB;
use GuzzleHttp\Client;

class PopulateTitles
{
    /**
     * @var \nntmux\db\DB
     */
    public $pdo;

    /**
     * @var \SimpleXMLElement
     */
    protected $dataXML;

    /**
     * @var \PDOStatement
     */
    protected $checkForDuplicate;

    /**
     * @var \PDOStatement
     */
    protected $insertEntry;

    protected $mainTable;

    /**
     * URL of source data.
     *
     * @var string
     */
    protected $sourceURL;

    protected $tempTable;

    /**
     * @var Client
     */
    protected $client;

    /**
     * @param $options
     */
    public function __construct($options)
    {
        $defaults = [
			'pdo'	=> null,
		];
        $options += $defaults;

        $this->sourceURL = $options['data-source-url'];
        $this->mainTable = $options['main-table'];
        $this->tempTable = $options['main-table'].'_tmp';

        if (isset($options['pdo']) && $options['pdo'] instanceof DB) {
            $this->pdo = $options['pdo'];
        }
    }

    protected function checkForDuplicate(array $parameters)
    {
        if ($this->checkForDuplicate instanceof \PDOStatement) {
            $this->checkForDuplicate->execute($parameters);

            return $this->checkForDuplicate->fetchAll();
        } else {
            throw new \RuntimeException('Duplicate check query not yet prepared!');
        }
    }

    protected function createTempTable()
    {
        // Clear the old temporary table.
        $sql = "DROP TABLE IF EXISTS {$this->tempTable}";
        $result = $this->pdo()->exec($sql);

        if ($result !== false) {
            $sql = "CREATE TABLE {$this->tempTable} LIKE {$this->mainTable}";
            $result = $this->pdo()->exec($sql);
        }

        return $result;
    }

    protected function insertEntry(array $parameters)
    {
        if ($this->insertEntry instanceof \PDOStatement) {
            $this->insertEntry->execute($parameters);

            return $this->insertEntry->fetchAll();
        } else {
            throw new \RuntimeException('Insertion query not yet prepared!');
        }
    }

    protected function loadXMLFromFile($file)
    {
        $useErrors = libxml_use_internal_errors(true);
        $this->dataXML = simplexml_load_file($file);

        if (! $this->dataXML) {
            foreach (libxml_get_errors() as $error) {
                echo "\t", $error->message;
            }
        }

        libxml_use_internal_errors($useErrors);

        return $this->dataXML !== false;
    }

    protected function pdo()
    {
        if ($this->pdo === null) {
            $this->pdo = new DB();
        }

        return $this->pdo;
    }

    /**
     * @param string $pathname full path to file for saving. Will be overwritten.
     *
     * @return bool|int
     */
    protected function saveSourceFile($pathname)
    {
        $client = new Client();
        $result = false;
        $file = $client->get($this->sourceURL)->getBody();
        if ($file !== false) {
            $result = file_put_contents($pathname, $file);
        }

        return $result;
    }
}