<?php

namespace App\Filament\User\Resources\ProductResource\Pages;

use App\Filament\User\Resources\ProductResource;
use App\Models\ProductSize;
use App\Models\Recipe;
use App\Services\ShopifyService;
use Filament\Actions;
use Filament\Notifications\Notification;
use Filament\Resources\Pages\EditRecord;

class EditProduct extends EditRecord
{
    protected static string $resource = ProductResource::class;

    protected function getHeaderActions(): array
    {
        return [
            Actions\Action::make('shopify-create-product')
                ->label('In Shopify veröffentlichen')
                ->icon('heroicon-o-arrow-up-tray')
                ->color('warning')
                ->requiresConfirmation()
                ->modalHeading('Produkt in Shopify anlegen')
                ->modalDescription('Erstellt das Produkt mit allen Varianten in Shopify und verknüpft die IDs.')
                ->visible(fn () => ! $this->record->shopify_product_id)
                ->action(fn () => $this->createProductInShopify()),
            Actions\Action::make('rezept-versionen')
                ->label('Rezept-Versionen')
                ->icon('heroicon-o-clock')
                ->color('gray')
                ->url(fn () => ProductResource::getUrl('recipe-history', ['record' => $this->record])),
            Actions\DeleteAction::make(),
        ];
    }

    protected function afterSave(): void
    {
        $this->syncSizes();
        $this->syncRecipe();
    }

    protected function syncSizes(): void
    {
        $product     = $this->record;
        $incoming    = collect($this->data['sizes'] ?? []);
        $keepIds     = [];

        foreach ($incoming as $size) {
            if (empty($size['packing_id'])) {
                continue;
            }

            $gtin = preg_replace('/\D/', '', (string) ($size['gtin'] ?? ''));

            $ps = ProductSize::updateOrCreate(
                [
                    'product_id' => $product->id,
                    'packing_id' => (int) $size['packing_id'],
                ],
                [
                    'price'       => $size['price'],
                    'sku'         => $size['sku'] ?: null,
                    'gtin'        => $gtin !== '' ? $gtin : null,
                    'description' => $size['description'] ?? null,
                ]
            );

            $keepIds[] = $ps->id;
        }

        // Only delete local-only sizes (no shopify_variant_id) that were removed
        ProductSize::where('product_id', $product->id)
            ->whereNotIn('id', $keepIds)
            ->whereNull('shopify_variant_id')
            ->delete();
    }

    protected function syncRecipe(): void
    {
        $product = $this->record;
        $spices  = $this->data['recipe_spices'] ?? [];

        if (empty($spices)) {
            return;
        }

        $newPivot = collect($spices)->mapWithKeys(fn ($s) => [
            (int) $s['spice_id'] => (float) $s['amount_in_percent'],
        ])->toArray();

        $current = $product->recipe;

        if ($current) {
            $current->load('spices');

            $existingPivot = $current->spices->mapWithKeys(fn ($s) => [
                $s->id => (float) $s->pivot->amount_in_percent,
            ])->toArray();

            if ($existingPivot == $newPivot) {
                return;
            }
        }

        $nextVersion = Recipe::where('product_id', $product->id)->max('version') + 1;

        $recipe = Recipe::create([
            'name'       => $product->title,
            'product_id' => $product->id,
            'version'    => $nextVersion,
        ]);

        $recipe->spices()->sync(
            collect($newPivot)->mapWithKeys(fn ($pct, $id) => [
                $id => ['amount_in_percent' => $pct],
            ])->toArray()
        );

        $product->update(['recipes_id' => $recipe->id]);
    }

    public function createProductInShopify(): void
    {
        $product = $this->record;

        if ($product->shopify_product_id) {
            Notification::make()->title('Bereits in Shopify verknüpft')->warning()->send();
            return;
        }

        $sizes = ProductSize::with('packing')->where('product_id', $product->id)->get();

        try {
            $result = app(ShopifyService::class)->createProduct($product, $sizes);

            $product->update(['shopify_product_id' => $result['shopify_product_id']]);

            foreach ($result['variants'] as $packingId => $variantId) {
                ProductSize::where('product_id', $product->id)
                    ->where('packing_id', $packingId)
                    ->update(['shopify_variant_id' => $variantId]);
            }

            Notification::make()->title('Produkt in Shopify erstellt')->success()->send();
            $this->redirect(ProductResource::getUrl('edit', ['record' => $product]));
        } catch (\Throwable $e) {
            Notification::make()->title('Shopify-Fehler')->body($e->getMessage())->danger()->send();
        }
    }

    public function publishVariantToShopify(int $sizeId): void
    {
        $size    = ProductSize::with('packing')->find($sizeId);
        $product = $this->record;

        if (! $size || $size->shopify_variant_id || ! $product->shopify_product_id) {
            Notification::make()
                ->title('Nicht möglich')
                ->body($product->shopify_product_id
                    ? 'Variante bereits in Shopify verknüpft.'
                    : 'Produkt hat keine Shopify-ID — zuerst shopify:import ausführen.')
                ->warning()
                ->send();
            return;
        }

        try {
            $variantId = app(ShopifyService::class)->createVariant($product->shopify_product_id, $size);
            $size->update(['shopify_variant_id' => $variantId]);
            Notification::make()->title('Variante in Shopify veröffentlicht')->success()->send();
            $this->redirect(ProductResource::getUrl('edit', ['record' => $product]));
        } catch (\Throwable $e) {
            Notification::make()->title('Shopify-Fehler')->body($e->getMessage())->danger()->send();
        }
    }

    public function syncVariantWithShopify(int $sizeId): void
    {
        $size = ProductSize::find($sizeId);

        if (! $size || ! $size->shopify_variant_id) {
            Notification::make()->title('Keine Shopify-Verknüpfung')->warning()->send();
            return;
        }

        try {
            app(ShopifyService::class)->updateVariant($size);
            Notification::make()->title('Shopify synchronisiert')->success()->send();
        } catch (\Throwable $e) {
            Notification::make()->title('Shopify-Fehler')->body($e->getMessage())->danger()->send();
        }
    }
}