<?php


class FaqModel
{

    public function redirectToStart($string)
    {
        header( "Location: ?c=default&a=index&rsn=$string" );
        exit();
    }

    public function getRoom( )
    {
        if( !isset( $_SESSION['room'] ) )
        {
            $this->redirectToStart( 'no-code' );
        }
        if( ( $id = $this->checkID( $_SESSION['room'] ) ) === false )
        {
            $this->redirectToStart( 'invalid' );
        }

        $stmnt = Database::getConnection()->prepare( 'SELECT * FROM rooms WHERE id = :id' );
        $stmnt->execute( array( 'id' => $id ) );

        return $stmnt->fetch( PDO::FETCH_ASSOC );


    }

    public function getQuestions( $room_id )
    {
        $stmnt = Database::getConnection()->prepare( 'SELECT * FROM questions WHERE room_id = :id' );
        $stmnt->execute( array( 'id' => $room_id ) );

        $result = $stmnt->fetchAll( PDO::FETCH_ASSOC );
        if( $result === false || empty( $result ) )
        {
            return false;
        }

        $return = array();
        foreach( $result as $index => $value )
        {
            $result[$index]['question'] = substr( $result[$index]['question'], 0, 50 );
            $result[$index]['question'] = str_replace( "\n", '   ', $result[$index]['question'] );
            $result[$index]['answer'] = substr( $result[$index]['answer'], 0, 50 );
            $result[$index]['answer'] = str_replace( "\n", '   ', $result[$index]['answer'] );
        }

        return $result;
    }

    private function checkID($room_id)
    {
        $stmnt = Database::getConnection()->prepare( 'SELECT id FROM rooms WHERE id = :id' );
        $stmnt->execute( array( 'id' => $room_id ) );

        $result = $stmnt->fetch( PDO::FETCH_ASSOC );
        if( $result === false || empty( $result ) )
        {
            return false;
        }
        return $result['id'];
    }

    public function addQuestion(int $room_id, string $question)
    {
        $stmnt = Database::getConnection()->prepare( 'INSERT INTO questions ( room_id, question, created_by ) VALUES ( :room_id, :question, :created_by )' );
        $stmnt->execute( array( 'room_id' => $room_id, 'question' => htmlspecialchars( $question ), 'created_by' => 'Anonymous' ) );

    }

    public function addAnswer(int $question_id, string $answer)
    {
        $stmnt = Database::getConnection()->prepare( 'UPDATE questions SET answer = :answer WHERE id = :id' );
        $stmnt->execute( array( 'answer' => htmlspecialchars( $answer ), 'id' => $question_id ) );

    }

    public function checkUserIsRoomOwner( array $a_room )
    {
        $stmnt = Database::getConnection()->prepare( 'SELECT id, owner_sid FROM rooms WHERE id = :id' );
        $stmnt->execute( array( 'id' => $a_room['id'] ) );
        $result = $stmnt->fetch( PDO::FETCH_ASSOC );

        if( $result === false || empty( $result ) )
        {
            return false;
        }
        if( $result['owner_sid'] === session_id() )
        {
            return true;
        }

        return false;
    }

    public function getQuestion( int $question_id)
    {
        $stmnt = Database::getConnection()->prepare( 'SELECT * FROM questions WHERE id = :id' );
        $stmnt->execute( array( 'id' => $question_id ) );

        $result = $stmnt->fetch( PDO::FETCH_ASSOC );
        if( $result === false || empty( $result ) )
        {
            return false;
        }
        $result['question'] = str_replace( "\n", '<br>', $result['question'] );
        return $result;
    }
}