<?php

namespace App\Http\Requests\Inventory;

use App\Models\Product;
use Illuminate\Foundation\Http\FormRequest;

class StoreProductionRequest extends FormRequest
{
    public function authorize(): bool
    {
        // Audit M-2: Produktionen buchen Produktbestand — gleiche Schranke
        // wie manuelle Bestandsbewegungen (admin >= 7).
        return (bool) $this->user()?->isAdmin();
    }

    /**
     * @return array<string, array<int, mixed|string>>
     */
    public function rules(): array
    {
        $recipeRequired = $this->recipeRequired();

        return [
            'product_id' => ['required', 'integer', 'exists:products,id'],
            'location_id' => ['required', 'integer', 'exists:locations,id'],
            'produced_at' => ['required', 'date'],
            'quantity' => ['required', 'integer', 'min:1'],
            'notes' => ['nullable', 'string', 'max:2000'],
            'ingredient_lines' => [$recipeRequired ? 'required' : 'nullable', 'array', $recipeRequired ? 'min:1' : 'min:0'],
            'ingredient_lines.*.ingredient_id' => ['required', 'integer', 'exists:ingredients,id'],
            // AP-27: Das Formular übergibt Chargen (batch_key); Einzel-Einträge (stock_entry_id) bleiben unterstützt.
            'ingredient_lines.*.batch_key' => ['required_without:ingredient_lines.*.stock_entry_id', 'nullable', 'string', 'max:120'],
            'ingredient_lines.*.stock_entry_id' => ['required_without:ingredient_lines.*.batch_key', 'nullable', 'integer', 'exists:stock_entries,id'],
            // Audit H-2: Vorzeichen-/Zahlprüfung — negative Zeilen konnten sich
            // in der Summenprüfung gegenseitig aufheben und Bestand aufblähen.
            'ingredient_lines.*.quantity_used' => ['required', 'string', function (string $attribute, mixed $value, \Closure $fail) {
                $n = reFormatNumber((string) $value);
                if (! is_numeric($n) || (float) $n <= 0) {
                    $fail(__('Die Menge je Chargen-Zeile muss größer als 0 sein.'));
                }
            }],
            // AP-28: Produktionsergebnis — bucht den Produktbestand; Planung oben ist unverbindlich.
            'outputs' => ['required', 'array', 'min:1'],
            'outputs.*.product_id' => ['required', 'integer', 'exists:products,id'],
            'outputs.*.quantity' => ['required', 'integer', 'min:1'],
            'outputs.*.batch_number' => ['nullable', 'string', 'max:100'],
        ];
    }

    private function recipeRequired(): bool
    {
        $product = Product::query()->find($this->input('product_id'));

        return $product === null ? true : ! (bool) $product->no_recipe_required;
    }

    /**
     * @return array<string, mixed>
     */
    public function validatedPayload(): array
    {
        $data = $this->validated();

        return [
            'product_id' => (int) $data['product_id'],
            'location_id' => (int) $data['location_id'],
            'produced_at' => $data['produced_at'],
            'quantity' => (int) $data['quantity'],
            'notes' => $data['notes'] ?? null,
            'ingredient_lines' => array_map(function (array $line): array {
                $out = [
                    'ingredient_id' => (int) $line['ingredient_id'],
                    'quantity_used' => $line['quantity_used'],
                ];
                if (! empty($line['batch_key'])) {
                    $out['batch_key'] = (string) $line['batch_key'];
                } else {
                    $out['stock_entry_id'] = (int) $line['stock_entry_id'];
                }

                return $out;
            }, $data['ingredient_lines'] ?? []),
            'outputs' => array_map(function (array $output): array {
                return [
                    'product_id' => (int) $output['product_id'],
                    'quantity' => (int) $output['quantity'],
                    'batch_number' => $output['batch_number'] ?? null,
                ];
            }, $data['outputs'] ?? []),
        ];
    }
}