<?php

namespace App\Repositories;

use App\Models\Attribute;
use App\Models\CountryPrice;
use App\Models\Ingredient;
use App\Models\Product;
use App\Models\ProductAttribute;
use App\Models\ProductCategory;
use App\Models\ProductImage;
use App\Models\ProductIngredient;
use App\Services\Slim;
use Illuminate\Database\Eloquent\Collection;

class ProductRepository extends BaseRepository
{
    public function __construct(Product $model)
    {
        $this->model = $model;
    }

    /**
     * refresh.
     */
    public function update($data)
    {

        $data['active'] = isset($data['active']) ? 1 : 0;
        $data['single_commission'] = isset($data['single_commission']) ? 1 : 0;
        $data['amount_commission'] = isset($data['amount_commission']) ? 1 : 0;
        $data['exclude_stats_sales'] = isset($data['exclude_stats_sales']) ? 1 : 0;
        $data['whitelabel'] = isset($data['whitelabel']) ? 1 : 0;
        $data['shipping_addon'] = isset($data['shipping_addon']) ? 1 : 0;
        $data['max_buy'] = isset($data['max_buy']) ? 1 : 0;
        $data['no_recipe_required'] = isset($data['no_recipe_required']) ? 1 : 0;
        $data['is_set'] = isset($data['is_set']) ? 1 : 0;
        $data['show_on'] = isset($data['show_on']) ? $data['show_on'] : null;

        $data['main_product_quantity'] = isset($data['main_product_quantity']) && $data['main_product_quantity'] !== ''
            ? (int) $data['main_product_quantity']
            : null;

        // Ein Set ist selbst keine Variante eines Hauptprodukts.
        $data['main_product_id'] = ! $data['is_set'] && isset($data['main_product_id']) && $data['main_product_id'] !== ''
            ? (int) $data['main_product_id']
            : null;

        // AP-11: Produktbestand-Schwellwerte (leer => null).
        $data['min_product_stock'] = isset($data['min_product_stock']) && $data['min_product_stock'] !== ''
            ? max(0, (int) $data['min_product_stock'])
            : null;
        $data['critical_product_stock'] = isset($data['critical_product_stock']) && $data['critical_product_stock'] !== ''
            ? max(0, (int) $data['critical_product_stock'])
            : null;

        // AP-03: „Nicht vorrätig"-Status. „Unbestimmt" hat Vorrang vor der Tagesangabe.
        $data['out_of_stock_indefinite'] = isset($data['out_of_stock_indefinite']) ? 1 : 0;

        if ($data['out_of_stock_indefinite']) {
            $data['out_of_stock_until'] = null;
        } elseif (isset($data['out_of_stock_active']) && isset($data['out_of_stock_days']) && $data['out_of_stock_days'] !== '') {
            $days = max(0, (int) $data['out_of_stock_days']);
            $data['out_of_stock_until'] = now()->addDays($days)->startOfDay();
        } else {
            $data['out_of_stock_until'] = null;
        }

        if (array_key_exists('shelf_life_type', $data)) {
            if ($data['shelf_life_type'] === '' || $data['shelf_life_type'] === null) {
                $data['shelf_life_type'] = null;
                $data['shelf_life_months'] = null;
            } elseif ($data['shelf_life_type'] === 'pao') {
                $data['shelf_life_months'] = null;
            } elseif ($data['shelf_life_type'] === 'fixed' && array_key_exists('shelf_life_months', $data) && $data['shelf_life_months'] !== '' && $data['shelf_life_months'] !== null) {
                $data['shelf_life_months'] = (int) $data['shelf_life_months'];
            }
        }

        if ($data['id'] === 'new') {
            $this->model = Product::create($data);
        } else {
            $this->model = $this->getById($data['id']);
            $this->model->fill($data);
            $this->model->save();
        }

        $this->updateCategories(isset($data['categories']) ? $data['categories'] : []);
        $this->updateAttributes(isset($data['attributes']) ? $data['attributes'] : []);

        $this->updateWLVariants(isset($data['whitelabel_variants']) ? $data['whitelabel_variants'] : []);
        $this->updateWLImageAttributs(isset($data['image_wl_attributes']) ? $data['image_wl_attributes'] : [], isset($data['whitelabel_variants']) ? $data['whitelabel_variants'] : []);

        if ($this->model->is_set) {
            // Sets haben keine eigene Rezeptur/Verpackung und werden nicht produziert.
            ProductIngredient::where('product_id', $this->model->id)->delete();
            $this->model->packagings()->detach();
            $this->updateSetItems($data);
        } else {
            $this->model->setItems()->detach();
            $this->updateIngredients($data);
            $this->updateManufacturerIngredients($data);
            $this->updatePackagings($data);
        }

        $this->updateCountryPrices($data);

        return $this->model;
    }

    public function updateSetItems(array $data = []): bool
    {
        if (! isset($data['set_component_id']) || ! is_array($data['set_component_id'])) {
            $this->model->setItems()->detach();

            return true;
        }

        $ids = $data['set_component_id'];
        $quantities = $data['set_quantity'] ?? [];
        $syncData = [];
        foreach ($ids as $index => $componentId) {
            $cid = (int) $componentId;
            if ($cid <= 0 || $cid === (int) $this->model->id) {
                continue;
            }
            $qty = (int) ($quantities[$index] ?? 1);
            if ($qty < 1) {
                $qty = 1;
            }
            $syncData[$cid] = [
                'quantity' => $qty,
                'pos' => (int) $index,
            ];
        }

        $this->model->setItems()->sync($syncData);

        return true;
    }

    public function updatePackagings(array $data = []): bool
    {
        if (! isset($data['pp_packaging_item_id']) || ! is_array($data['pp_packaging_item_id'])) {
            $this->model->packagings()->detach();

            return true;
        }

        $ids = $data['pp_packaging_item_id'];
        $quantities = $data['pp_quantity'] ?? [];
        $syncData = [];
        foreach ($ids as $index => $packagingItemId) {
            $pid = (int) $packagingItemId;
            if ($pid <= 0) {
                continue;
            }
            $qtyRaw = $quantities[$index] ?? null;
            $qty = $this->parseNullableDecimal($qtyRaw);
            if ($qty === null || $qty <= 0) {
                $qty = 1.0;
            }
            $syncData[$pid] = [
                'quantity' => $qty,
                'pos' => (int) $index,
            ];
        }

        $this->model->packagings()->sync($syncData);

        return true;
    }

    public function updateIngredients(array $data = []): bool
    {
        if (! array_key_exists('product_inci_sync_sent', $data)) {
            if (isset($data['product_ingredients']) && is_array($data['product_ingredients'])) {
                $ids = array_values(array_unique(array_filter(array_map('intval', $data['product_ingredients']), fn (int $id) => $id > 0)));
                $defaults = Ingredient::whereIn('id', $ids)->pluck('default_factor', 'id');

                ProductIngredient::where('product_id', $this->model->id)
                    ->where('recipe_type', 'product')
                    ->delete();

                foreach ($ids as $index => $ingredientId) {
                    $factor = $defaults[$ingredientId] ?? 1.10;
                    ProductIngredient::create([
                        'product_id' => $this->model->id,
                        'ingredient_id' => $ingredientId,
                        'pos' => $index,
                        'gram' => null,
                        'factor' => $factor,
                        'recipe_type' => 'product',
                    ]);
                }
            }

            return true;
        }

        if (isset($data['pi_ingredient_id']) && is_array($data['pi_ingredient_id'])) {
            $ids = $data['pi_ingredient_id'];
            $grams = $data['pi_gram'] ?? [];
            $factors = $data['pi_factor'] ?? [];

            ProductIngredient::where('product_id', $this->model->id)
                ->where('recipe_type', 'product')
                ->delete();

            foreach ($ids as $index => $ingredientId) {
                $ingredientId = (int) $ingredientId;
                if ($ingredientId <= 0) {
                    continue;
                }
                ProductIngredient::create([
                    'product_id' => $this->model->id,
                    'ingredient_id' => $ingredientId,
                    'pos' => $index,
                    'gram' => $this->parseNullableDecimal($grams[$index] ?? null),
                    'factor' => $this->parseFactor($factors[$index] ?? null, $ingredientId),
                    'recipe_type' => 'product',
                ]);
            }

            return true;
        }

        ProductIngredient::where('product_id', $this->model->id)
            ->where('recipe_type', 'product')
            ->delete();

        return true;
    }

    public function updateManufacturerIngredients(array $data = []): bool
    {
        if (! array_key_exists('manufacturer_inci_sync_sent', $data)) {
            return true;
        }

        if (isset($data['mfg_ingredient_id']) && is_array($data['mfg_ingredient_id'])) {
            $ids = $data['mfg_ingredient_id'];
            $grams = $data['mfg_gram'] ?? [];
            $factors = $data['mfg_factor'] ?? [];

            ProductIngredient::where('product_id', $this->model->id)
                ->where('recipe_type', 'manufacturer')
                ->delete();

            foreach ($ids as $index => $ingredientId) {
                $ingredientId = (int) $ingredientId;
                if ($ingredientId <= 0) {
                    continue;
                }
                ProductIngredient::create([
                    'product_id' => $this->model->id,
                    'ingredient_id' => $ingredientId,
                    'pos' => $index,
                    'gram' => $this->parseNullableDecimal($grams[$index] ?? null),
                    'factor' => $this->parseFactor($factors[$index] ?? null, $ingredientId),
                    'recipe_type' => 'manufacturer',
                ]);
            }

            return true;
        }

        ProductIngredient::where('product_id', $this->model->id)
            ->where('recipe_type', 'manufacturer')
            ->delete();

        return true;
    }

    private function parseNullableDecimal(mixed $value): ?float
    {
        if ($value === null || $value === '') {
            return null;
        }
        if (is_numeric($value)) {
            return (float) $value;
        }
        $normalized = reFormatNumber((string) $value);

        return $normalized !== null && $normalized !== '' ? (float) $normalized : null;
    }

    private function parseFactor(mixed $value, int $ingredientId): float
    {
        if ($value === null || $value === '') {
            $default = Ingredient::whereKey($ingredientId)->value('default_factor');

            return $default !== null ? (float) $default : 1.10;
        }
        if (is_numeric($value)) {
            return (float) $value;
        }
        $normalized = reFormatNumber((string) $value);

        return $normalized !== null && $normalized !== '' ? (float) $normalized : 1.10;
    }

    public function updateCategories($data = [])
    {
        foreach ($this->model->categories as $category) {
            if (($pos = array_search($category->category_id, $data)) !== false) {
                unset($data[$pos]);
            } else {
                $category->delete();
            }
        }
        // set attr
        if (is_array($data)) {
            foreach ($data as $id) {
                ProductCategory::create([
                    'product_id' => $this->model->id,
                    'category_id' => $id,
                ]);
            }
        }

        return true;
    }

    public function updateAttributes($data = [])
    {
        foreach ($this->model->attributes as $attribute) {
            if (($pos = array_search($attribute->attribute_id, $data)) !== false) {
                unset($data[$pos]);
            } else {
                $attribute->delete();
            }
        }
        // set attr
        if (is_array($data)) {
            foreach ($data as $id) {
                $attribute = Attribute::findOrFail($id);
                ProductAttribute::create([
                    'product_id' => $this->model->id,
                    'type_id' => $attribute->attribute_type_id,
                    'attribute_id' => $attribute->id,
                ]);
            }
        }

        return true;
    }

    public function updateWLVariants($data = [])
    {
        foreach ($this->model->attribute_variants as $variant) {
            if (($pos = array_search($variant->attribute_id, $data)) !== false) {
                unset($data[$pos]);
            } else {
                $variant->delete();
            }
        }
        // set attr
        if (is_array($data)) {
            foreach ($data as $id) {
                $attribute = Attribute::findOrFail($id);
                ProductAttribute::create([
                    'product_id' => $this->model->id,
                    'type_id' => $attribute->attribute_type_id,
                    'attribute_id' => $attribute->id,
                ]);
            }
        }

        return true;
    }

    public function updateWLImageAttributs($attributes = [], $variants = [])
    {
        // abgleich der attributes gegen die variants
        foreach ($attributes as $image => $value) {
            foreach ($value as $k => $val) {
                if (! is_array($variants) || ! in_array($val, $variants)) {
                    unset($attributes[$image][$k]);
                }
            }
        }
        foreach ($this->model->whitelabel_images as $image) {
            $image->update([
                'attributes' => isset($attributes[$image->id]) ? $attributes[$image->id] : null,
            ]);
        }

        return true;
    }

    public function updateCountryPrices($data)
    {
        if (! isset($data['country_prices']) || ! is_array($data['country_prices'])) {
            return false;
        }
        foreach ($data['country_prices'] as $k => $country_id) {
            $cp = CountryPrice::updateOrCreate([
                'country_id' => $country_id,
                'product_id' => $this->model->id,
            ],
                [
                    'c_price' => isset($data['c_price'][$country_id]) ? reFormatNumber($data['c_price'][$country_id]) : null,
                    'c_tax' => isset($data['c_tax'][$country_id]) ? reFormatNumber($data['c_tax'][$country_id]) : null,
                    'c_price_old' => isset($data['c_price_old'][$country_id]) ? reFormatNumber($data['c_price_old'][$country_id]) : null,
                    'c_currency' => isset($data['c_currency'][$country_id]) ? reFormatNumber($data['c_currency'][$country_id]) : null,
                ]);
        }

        return true;
    }

    public function copy($model)
    {
        $this->model = $model->replicate();
        $this->model->name = 'Kopie: '.$this->model->name;
        $this->model->wp_number = null;
        $this->model->save();

        foreach ($model->categories as $category) {
            ProductCategory::create([
                'product_id' => $this->model->id,
                'category_id' => $category->category_id,
            ]);
        }

        foreach ($model->attributes as $attribute) {
            ProductAttribute::create([
                'product_id' => $this->model->id,
                'type_id' => $attribute->type_id,
                'attribute_id' => $attribute->attribute_id,
            ]);
        }

        foreach ($model->attribute_variants as $variant) {
            ProductAttribute::create([
                'product_id' => $this->model->id,
                'type_id' => $variant->type_id,
                'attribute_id' => $variant->attribute_id,
            ]);
        }

        foreach ($model->p_ingredients()->orderByPivot('pos')->get() as $ing) {
            ProductIngredient::create([
                'product_id' => $this->model->id,
                'ingredient_id' => $ing->id,
                'pos' => (int) ($ing->pivot->pos ?? 0),
                'gram' => $ing->pivot->gram,
                'factor' => $ing->pivot->factor !== null ? (float) $ing->pivot->factor : 1.10,
                'recipe_type' => 'product',
            ]);
        }

        foreach ($model->manufacturer_ingredients()->orderByPivot('pos')->get() as $ing) {
            ProductIngredient::create([
                'product_id' => $this->model->id,
                'ingredient_id' => $ing->id,
                'pos' => (int) ($ing->pivot->pos ?? 0),
                'gram' => $ing->pivot->gram,
                'factor' => $ing->pivot->factor !== null ? (float) $ing->pivot->factor : 1.10,
                'recipe_type' => 'manufacturer',
            ]);
        }

        $packSync = [];
        foreach ($model->packagings()->orderByPivot('pos')->get() as $pack) {
            $packSync[$pack->id] = [
                'quantity' => $pack->pivot->quantity !== null ? (float) $pack->pivot->quantity : 1.0,
                'pos' => (int) ($pack->pivot->pos ?? 0),
            ];
        }
        $this->model->packagings()->sync($packSync);

        $setSync = [];
        foreach ($model->setItems()->get() as $component) {
            $setSync[$component->id] = [
                'quantity' => $component->pivot->quantity !== null ? (int) $component->pivot->quantity : 1,
                'pos' => (int) ($component->pivot->pos ?? 0),
            ];
        }
        if ($setSync !== []) {
            $this->model->setItems()->sync($setSync);
        }

        foreach ($model->country_prices as $cp) {
            CountryPrice::create([
                'country_id' => $cp->country_id,
                'product_id' => $this->model->id,
                'c_price' => $cp->c_price,
                'c_tax' => $cp->c_tax,
                'c_price_old' => $cp->c_price_old,
                'c_currency' => $cp->c_currency,
            ]);
        }

        $this->copyImages($model->images, 'product');
        $this->copyImages($model->whitelabel_images, 'wllogo');

        return $this->model;
    }

    /**
     * @param  Collection<int, ProductImage>  $images
     */
    protected function copyImages($images, string $type): void
    {
        foreach ($images as $image) {
            $name = Slim::sanitizeFileName($image->original_name);
            $name = uniqid().'_'.$name;

            $sourcePath = 'images/product/'.$image->product_id.'/'.$image->filename;
            $targetPath = 'images/product/'.$this->model->id.'/'.$name;

            if (\Storage::disk('public')->exists($sourcePath)) {
                \Storage::disk('public')->copy($sourcePath, $targetPath);
            }

            ProductImage::create([
                'product_id' => $this->model->id,
                'type' => $image->type,
                'filename' => $name,
                'original_name' => $image->original_name,
                'ext' => $image->ext,
                'mine' => $image->mine,
                'size' => $image->size,
                'pos' => $image->pos,
                'active' => $image->active ?? true,
                'attributes' => $image->attributes,
            ]);
        }
    }

    public function delete() {}
}