<?php

namespace Filament\Actions\Concerns;

use BackedEnum;
use Closure;
use Filament\Support\Contracts\HasLabel as LabelInterface;
use Illuminate\Contracts\Support\Arrayable;
use UnitEnum;

trait HasSelect
{
    use HasId;

    /**
     * @var array<string> | Arrayable | string | Closure
     */
    protected array | Arrayable | string | Closure $options = [];

    protected ?string $placeholder = null;

    /**
     * @param  array<string> | Arrayable | string | Closure  $options
     */
    public function options(array | Arrayable | string | Closure $options): static
    {
        $this->options = $options;

        return $this;
    }

    public function placeholder(string $placeholder): static
    {
        $this->placeholder = $placeholder;

        return $this;
    }

    /**
     * @return array<string>
     */
    public function getOptions(): array
    {
        $options = $this->evaluate($this->options) ?? [];

        if (
            is_string($options) &&
            enum_exists($enum = $options)
        ) {
            if (is_a($enum, LabelInterface::class, allow_string: true)) {
                return array_reduce($enum::cases(), function (array $carry, LabelInterface & UnitEnum $case): array {
                    $carry[$case instanceof BackedEnum ? $case->value : $case->name] = $case->getLabel() ?? $case->name;

                    return $carry;
                }, []);
            }

            return array_reduce($enum::cases(), function (array $carry, UnitEnum $case): array {
                $carry[$case instanceof BackedEnum ? $case->value : $case->name] = $case->name;

                return $carry;
            }, []);
        }

        if ($options instanceof Arrayable) {
            $options = $options->toArray();
        }

        return $options;
    }

    public function getPlaceholder(): ?string
    {
        return $this->placeholder;
    }
}
