<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rule;

class StoreEngineRequest extends FormRequest
{
    public function authorize(): bool
    {
        return true;
    }

    protected function prepareForValidation(): void
    {
        foreach (['power', 'voltage', 'current', 'eta', 'cos_fi', 'rpm', 'length', 'weight', 'diameter'] as $f) {
            $this->merge([$f => $this->dec($this->$f)]);
        }
    }

    public function rules(): array
    {
        return [
            // Unikalność: nazwa + napięcie (jak legacy).
            'name'            => ['required', 'string', 'max:128', Rule::unique('seg_engines', 'ENG_NAME')->where(fn ($q) => $q->where('ENG_VOLTAGE', $this->voltage))],
            'manufacturer_id' => ['required', 'integer', 'exists:seg_manufacturers,MCF_ID'],
            'power'           => ['required', 'numeric'],
            'voltage'         => ['required', 'numeric'],
            'current'         => ['nullable', 'numeric'],
            'eta'             => ['nullable', 'numeric'],
            'cos_fi'          => ['nullable', 'numeric'],
            'rpm'             => ['nullable', 'numeric'],
            'length'          => ['nullable', 'numeric'],
            'weight'          => ['nullable', 'numeric'],
            'diameter'        => ['nullable', 'numeric'],
            'wires'           => ['nullable', 'string', 'max:32'],
        ];
    }

    private function dec(mixed $v): ?string
    {
        return $v === null || $v === '' ? null : str_replace(',', '.', (string) $v);
    }
}