<?php

namespace Ulmus\Query;

class Show extends Fragment {

    public int $order = -100;

    const SQL_TOKEN = "SHOW";

    const SQL_TOKEN_FROM = "FROM";

    const SQL_SHOW_DATABASES = "DATABASES";

    const SQL_SHOW_TABLES = "TABLES";

    public string $show;

    public string $from;

    public string $in;

    public function set(string $show, ? string $from = null, ? string $in = null) : self
    {
        $this->show = $show;

        if ( $from !== null ) {
            $this->from = $from;
        }

        if ( $in !== null ) {
            $this->in = $in;
        }
        
        return $this;
    }

    public function render() : string
    {
        return $this->renderSegments([
            static::SQL_TOKEN, $this->show,
        ] + ( ! empty($this->from) ? [ static::SQL_TOKEN_FROM, $this->from ] : [] ) + ( ! empty($this->in) ? [ static::SQL_TOKEN_IN, $this->in ] : [] ) );
    }

}