<?php

namespace Ulmus\Common;

use PDO,
    PDOStatement;

class PdoObject extends PDO {

    public function select(string $sql, array $parameters = []): PDOStatement {
        # var_dump($sql, $parameters); die();
        
        try {
            if (false !== ( $statement = $this->prepare($sql) )) {
                $statement = $this->execute($statement, $parameters, false);
                $statement->setFetchMode(\PDO::FETCH_ASSOC);

                return $statement;
            }
        } catch (\PDOException $e) {
            throw $e;
        }
    }

    public function runQuery(string $sql, array $parameters = []): PDOStatement {
        # var_dump($sql, $parameters); die();
        
        try {
            if (false !== ( $statement = $this->prepare($sql) )) {
                return $this->execute($statement, $parameters, true);
            }
        } catch (\PDOException $e) {
            throw $e;
        }
    }

    public function execute(PDOStatement $statement, array $parameters = [], bool $commit = true): ?PDOStatement {
        try {
            if ( ! $this->inTransaction() ) {
                $this->beginTransaction();
            }

            if (empty($parameters) ? $statement->execute() : $statement->execute($parameters)) {
                $statement->lastInsertId = $this->lastInsertId();

                if ($commit) {
                    $this->commit();
                }

                return $statement;
            } else {
                throw new PDOException('Could not begin transaction or given statement is invalid.');
            }
        } catch (\PDOException $e) {
            $this->rollback();
            throw $e;
        }

        return null;
    }

}