<?php

namespace app\Core;

use app\Core\Connect;
use PDO;
use PDOException;

/**
 * Description of WppModel
 *
 * @author Lucas Awade
 */
abstract class Model
{

    protected $query;

    protected function strquery($stmt, $params)
    {
        foreach ($params as $key => $value) {
            if (is_null($value) || (is_string($value) && $value == '')) {
                $value = null;
            }
            $stmt->bindValue(":{$key}", $value, (is_int($value) ? PDO::PARAM_INT : PDO::PARAM_STR));
        }
    }

    public function begin()
    {
        try {
            Connect::getInstance()->beginTransaction();
            return 1;
        } catch (PDOException $ex) {
            Connect::setInstance(null);
            logger('PDOExcep')->error('PDOException: ' . $ex->getMessage(), debug_backtrace());
            return null;
        }
    }

    public function commit()
    {
        try {
            Connect::getInstance()->commit();
            return 1;
        } catch (PDOException $ex) {
            Connect::setInstance(null);
            logger('PDOExcep')->error('PDOException: ' . $ex->getMessage(), debug_backtrace());
            return null;
        }
    }

    public function rollback()
    {
        try {
            Connect::getInstance()->rollBack();
            return 1;
        } catch (PDOException $ex) {
            Connect::setInstance(null);
            logger('PDOExcep')->error('PDOException: ' . $ex->getMessage(), debug_backtrace());
            return null;
        }
    }

    protected function create($query, $data)
    {
        try {
            $stmt = Connect::getInstance()->prepare($query);
            $this->strquery($stmt, $data);
            $stmt->execute();
            return Connect::getInstance()->lastInsertId();
        } catch (PDOException $ex) {
            Connect::setInstance(null);
            logger('PDOExcep')->error('PDOException: ' . $ex->getMessage(), debug_backtrace());
            return null;
        }
    }

    protected function read($query, $data = null)
    {
        try {
            $stmt = Connect::getInstance()->prepare($query);
            $this->strquery($stmt, $data);
            $stmt->execute();
            return $stmt;
        } catch (PDOException $ex) {
            Connect::setInstance(null);
            logger('PDOExcep')->error('PDOException: ' . $ex->getMessage(), debug_backtrace());
            return null;
        }
    }

    protected function delete($query, $data)
    {
        try {
            $stmt = Connect::getInstance()->prepare($query);
            $this->strquery($stmt, $data);
            $stmt->execute();
            return ($stmt->rowCount() ? 1 : 0);
        } catch (PDOException $ex) {
            Connect::setInstance(null);
            logger('PDOExcep')->error('PDOException: ' . $ex->getMessage(), debug_backtrace());
            return null;
        }
    }

    protected function update($query, $data)
    {
        try {
            $stmt = Connect::getInstance()->prepare($query);
            $this->strquery($stmt, $data);
            $stmt->execute();
            return ($stmt->rowCount() ? 1 : 0);
        } catch (PDOException $ex) {
            Connect::setInstance(null);
            logger('PDOExcep')->error('PDOException: ' . $ex->getMessage(), debug_backtrace());
            return null;
        }
    }
}