<?php

declare(strict_types=1);

namespace App\Framework\Database\Criteria\Projection;

use App\Framework\Database\Criteria\Projection;

/**
 * List of multiple projections
 */
final readonly class ProjectionList implements Projection
{
    /** @var Projection[] */
    public array $projections;

    public function __construct(Projection ...$projections)
    {
        $this->projections = $projections;
    }

    public function add(Projection $projection): self
    {
        $newProjections = [...$this->projections, $projection];

        return new self(...$newProjections);
    }

    public function toSql(): string
    {
        if (empty($this->projections)) {
            return '*';
        }

        return implode(', ', array_map(fn ($p) => $p->toSql(), $this->projections));
    }

    public function getAliases(): array
    {
        $aliases = [];
        foreach ($this->projections as $projection) {
            $aliases = array_merge($aliases, $projection->getAliases());
        }

        return $aliases;
    }
}