<?php

namespace App\Http\Controllers;

use App\Models\Country;
use App\Models\Ingredient;
use App\Models\PackagingItem;
use App\Models\Product;
use App\Models\ProductImage;
use App\Models\ProductIngredient;
use App\Models\StorageRoom;
use App\Models\StorageShelf;
use App\Models\StorageSlot;
use App\Repositories\ProductRepository;
use Illuminate\Database\Eloquent\Collection;
use Request;
use Validator;

class ProductController extends Controller
{
    protected $productRepo;

    public function __construct(ProductRepository $productRepo)
    {
        $this->middleware('copyreader');
        $this->productRepo = $productRepo;
    }

    public function index()
    {
        if (Request::get('show_active_products')) {
            set_user_attr('show_active_products', Request::get('show_active_products'));
        }
        if (get_user_attr('show_active_products') === 'true') {
            $values = Product::withCount('user_whitelabel_products')->where('active', true)->orderBy('pos', 'DESC')->orderBy('id', 'DESC')->get();
        } else {
            $values = Product::withCount('user_whitelabel_products')->orderBy('pos', 'DESC')->orderBy('id', 'DESC')->get();

        }
        $data = [
            'values' => $values,
        ];

        return view('admin.product.index', $data);
    }

    public function edit($id)
    {
        if ($id === 'new') {
            $model = new Product;
            $model->active = true;
        } else {
            $model = Product::findOrFail($id);
            $model->load(['packagings.packagingMaterial', 'setItems']);
        }

        $country_for_prices = Country::where('own_eur', '=', true)->orWhere('currency', '=', true)->get();
        $data = [
            'product' => $model,
            'country_for_prices' => $country_for_prices,
            'ingredient_catalog' => Ingredient::query()->where('active', true)->with('materialQuality')->orderBy('name')->get(['id', 'name', 'inci', 'effect', 'default_factor', 'material_quality_id']),
            'packaging_catalog' => PackagingItem::query()->where('active', true)->with('packagingMaterial')->orderBy('name')->get(),
            'set_product_catalog' => $this->setProductCatalog($model),
            'storageRooms' => StorageRoom::query()->active()->orderBy('pos')->orderBy('label')->get(),
            'storageShelves' => StorageShelf::query()->active()->orderBy('pos')->orderBy('label')->get(),
            'storageSlots' => StorageSlot::query()->active()->orderBy('pos')->orderBy('label')->get(),
        ];

        return view('admin.product.edit', $data);
    }

    /**
     * Auswählbare Set-Bestandteile: aktive Einzelprodukte (keine Sets, nicht das Produkt selbst).
     *
     * @return Collection<int, Product>
     */
    protected function setProductCatalog(Product $model)
    {
        return Product::query()
            ->where('active', true)
            ->singleProducts()
            ->when($model->id, fn ($q) => $q->where('id', '!=', $model->id))
            ->orderBy('name')
            ->get(['id', 'name', 'number']);
    }

    public function store()
    {

        $data = Request::all();

        // Ohne WP-Nummer wird die Artikelnummer übernommen, reduziert auf Ziffern
        // (wp_number ist eine Integer-Spalte). Vor der Validierung, damit die
        // Unique-Regel auch den abgeleiteten Wert prüft.
        if (trim((string) ($data['wp_number'] ?? '')) === '' && trim((string) ($data['number'] ?? '')) !== '') {
            $derived = preg_replace('/\D+/', '', (string) $data['number']);
            if ($derived !== '') {
                Request::merge(['wp_number' => $derived]);
                $data['wp_number'] = $derived;
            }
        }

        // F-08: Füllgewicht deutsch normalisieren („39,5“) und positiv validieren.
        if (Request::has('fill_weight')) {
            $fillRaw = trim((string) Request::input('fill_weight'));
            $fillNormalized = $fillRaw === '' ? null : reFormatWawiNumber($fillRaw);
            // Unbrauchbare Eingabe („abc“) nicht zu leer normalisieren, sonst greift nullable.
            Request::merge(['fill_weight' => $fillNormalized === '' || $fillNormalized === false ? $fillRaw : $fillNormalized]);
        }

        $rules = [
            'name' => 'required',
            'fill_weight' => ['nullable', 'numeric', 'gt:0'],
        ];
        /*if(isset($data['number']) && $data['number'] != ""){
            $rules['number'] = 'int';
        }*/
        if (isset($data['wp_number'])) {
            if ($data['id'] !== 'new') {
                $model = Product::findOrFail($data['id']);
                $rules['wp_number'] = 'unique:products,wp_number,'.$model->id;
            } else {
                $rules['wp_number'] = 'unique:products,wp_number';

            }
        }
        $validator = Validator::make(Request::all(), $rules);

        if ($data['id'] === 'new') {
            $model = new Product;
        } else {
            $model = Product::findOrFail($data['id']);
            $model->load(['packagings.packagingMaterial', 'setItems']);
        }
        $country_for_prices = Country::where('own_eur', '=', true)->orWhere('currency', '=', true)->get();

        $this->validateSetItems($validator, Request::all(), $model);

        $data = [
            'product' => $model,
            'country_for_prices' => $country_for_prices,
            'ingredient_catalog' => Ingredient::query()->where('active', true)->with('materialQuality')->orderBy('name')->get(['id', 'name', 'inci', 'effect', 'default_factor', 'material_quality_id']),
            'packaging_catalog' => PackagingItem::query()->where('active', true)->with('packagingMaterial')->orderBy('name')->get(),
            'set_product_catalog' => $this->setProductCatalog($model),
            'storageRooms' => StorageRoom::query()->active()->orderBy('pos')->orderBy('label')->get(),
            'storageShelves' => StorageShelf::query()->active()->orderBy('pos')->orderBy('label')->get(),
            'storageSlots' => StorageSlot::query()->active()->orderBy('pos')->orderBy('label')->get(),
        ];

        if ($validator->fails()) {

            return view('admin.product.edit', $data)->withErrors($validator);

        } else {
            $product = $this->productRepo->update(Request::all());
            \Session()->flash('alert-save', true);

            return redirect(route('admin_product_edit', [$product->id]));
        }
    }

    /**
     * Set-Validierung: Set braucht mindestens ein Einzelprodukt als Bestandteil
     * (keine Sets, nicht das Produkt selbst).
     *
     * @param  array<string, mixed>  $data
     */
    protected function validateSetItems($validator, array $data, Product $model): void
    {
        if (! isset($data['is_set'])) {
            return;
        }

        $validator->after(function ($validator) use ($data, $model) {
            $componentIds = collect($data['set_component_id'] ?? [])
                ->map(fn ($id) => (int) $id)
                ->filter(fn (int $id) => $id > 0 && $id !== (int) $model->id)
                ->unique()
                ->values();

            if ($componentIds->isEmpty()) {
                $validator->errors()->add('set_component_id', __('Ein Set benötigt mindestens ein Einzelprodukt als Bestandteil.'));

                return;
            }

            $components = Product::query()->whereIn('id', $componentIds)->get(['id', 'is_set']);

            if ($components->count() !== $componentIds->count()) {
                $validator->errors()->add('set_component_id', __('Mindestens ein gewählter Bestandteil existiert nicht.'));
            }

            if ($components->where('is_set', true)->isNotEmpty()) {
                $validator->errors()->add('set_component_id', __('Set-Bestandteile dürfen selbst keine Sets sein.'));
            }
        });
    }

    public function copy($id)
    {
        $model = Product::findOrFail($id);
        $withAssignments = (bool) Request::get('with_assignments', false);
        $product = $this->productRepo->copy($model, $withAssignments);
        if ($withAssignments) {
            $count = $product->user_whitelabel_products()->count();
            \Session()->flash('alert-success', 'Eintrag kopiert, '.$count.' Kundenzuordnung(en) übernommen');
        } else {
            \Session()->flash('alert-success', 'Eintrag kopiert');
        }

        return redirect(route('admin_product_show'));
    }

    public function delete($id, $do = 'product', $did = null)
    {
        if ($do === 'product') {
            $model = Product::findOrFail($id);
            $model->delete();
            \Session()->flash('alert-success', 'Eintrag gelöscht');

            return redirect(route('admin_product_show'));
        }

        if ($do === 'ingredient') {
            $model = Product::findOrFail($id);
            $productIngredient = ProductIngredient::where('ingredient_id', $did)->where('product_id', $model->id)->first();
            if ($productIngredient) {
                $productIngredient->delete();
                \Session()->flash('alert-success', 'Eintrag gelöscht');
            }

            return redirect(route('admin_product_edit', [$model->id]));
        }

        abort(404);
    }

    // Upload FILE  -----------------------------------------------------------------------------------------------------------------------
    public function imageUpload()
    {

        if (Request::has('product_id')) {
            $product = Product::findOrFail(Request::get('product_id'));

            return \App\Services\ProductImage::imageUpload('product', $product, Request::get('upload_type'));
        }

    }

    public function imageDelete($product_image_id, $product_id)
    {
        $product = Product::findOrFail($product_id);

        return \App\Services\ProductImage::imageDelete('product', $product, $product_image_id);

    }

    public function imageAttribute($product_id, $attr, $val = false)
    {
        // Audit M-7: nur erlaubte Spalten — $attr kommt aus der URL und würde
        // sonst die $fillable-Whitelist per dynamischer Property umgehen.
        if (! in_array($attr, ['active', 'pos'], true) || ! is_numeric($val)) {
            abort(400);
        }

        if ($val < 0) {
            $val = 0;
        }

        $product_image = ProductImage::findOrFail($product_id);

        $product_image->{$attr} = $val;
        $product_image->save();

        \Session()->flash('alert-success', 'Wert gespeichert');

        return redirect()->back();

    }
}