<?php

namespace Ulmus\Query;

use Ulmus\Adapter\AdapterInterface;
use Ulmus\Annotation,
    Ulmus\Common\EntityField;

class Alter extends Fragment {

    const SQL_TOKEN = "ALTER TABLE";

    public string $table;

    public string $engine;

    public int $order = -80;

    public bool $skipExisting = true;

    public array $fieldList;

    public AdapterInterface $adapter;

    public function __construct(AdapterInterface $adapter) {
        $this->adapter = $adapter;
    }

    public function render() : string
    {
        return $this->renderSegments([
            static::SQL_TOKEN, $this->renderTables($this->table), $this->renderFields(),
        ]);
    }

    public function renderFields() : string
    {
        return PHP_EOL . implode("," . PHP_EOL, array_map(function($field) {
            return "    " . EntityField::generateAlterColumn($this->adapter, $field);
        }, $this->fieldList));
    }
}