<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

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

    protected function prepareForValidation(): void
    {
        $this->merge([
            'q_n'      => $this->dec($this->q_n),
            'length'   => $this->dec($this->length),
            'diameter' => $this->dec($this->diameter),
            'weight'   => $this->dec($this->weight),
            'h'        => collect($this->h ?? [])->map(fn ($v) => $this->dec($v))->all(),
            'eta'      => collect($this->eta ?? [])->map(fn ($v) => $this->dec($v))->all(),
        ]);
    }

    public function rules(): array
    {
        return [
            'name'            => ['required', 'string', 'max:128', 'unique:seg_pumps,PUP_NAME'],
            'manufacturer_id' => ['required', 'integer', 'exists:seg_manufacturers,MCF_ID'],
            'q_n'             => ['required', 'numeric', 'gt:0'],
            // 8 punktów krzywych - H wymagane (>0), η wymagane (0 dozwolone przy Q=0).
            'h'               => ['required', 'array', 'size:8'],
            'h.*'             => ['required', 'numeric'],
            'eta'             => ['required', 'array', 'size:8'],
            'eta.*'           => ['required', 'numeric'],
            'length'          => ['nullable', 'numeric'],
            'diameter'        => ['nullable', 'numeric'],
            'weight'          => ['nullable', 'numeric'],
        ];
    }

    public function messages(): array
    {
        return [
            'h.*.required'   => 'Podaj wartość H dla każdego punktu Q.',
            'eta.*.required' => 'Podaj wartość η dla każdego punktu Q.',
        ];
    }

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