<?php

namespace App\Modules\CustomField\Actions;

use App\Modules\CustomField\DTOs\CustomFieldDefinitionData;
use App\Modules\CustomField\Models\CustomFieldDefinition;
use App\Modules\CustomField\Models\CustomFieldType;
use Illuminate\Support\Str;

final class CreateCustomFieldDefinitionAction
{
    public function handle(CustomFieldDefinitionData $data): CustomFieldDefinition
    {
        return CustomFieldDefinition::create([
            'label' => $data->label,
            'key' => $this->uniqueKey($data->label),
            'type' => $data->type,
            'options' => $data->type === CustomFieldType::Select->value ? array_values($data->options ?? []) : null,
            'is_required' => $data->isRequired,
            // New entries always land at the end of the list.
            'sort_order' => (CustomFieldDefinition::max('sort_order') ?? -1) + 1,
        ]);
    }

    private function uniqueKey(string $label): string
    {
        $base = Str::slug($label, '_') ?: 'field';
        $key = $base;
        $i = 1;

        while (CustomFieldDefinition::withTrashed()->where('key', $key)->exists()) {
            $key = $base.'_'.(++$i);
        }

        return $key;
    }
}