<?php

namespace App\Modules\Integration\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Modules\Inventory\Contracts\ProductServiceInterface;
use Illuminate\Support\Facades\Log;

class ProductSyncController extends Controller
{
    protected $productService;

    public function __construct(ProductServiceInterface $productService)
    {
        $this->productService = $productService;
    }

    public function upsert(Request $request)
    {
        $request->validate([
            'external_pos_id' => 'required|string|max:255',
            'name' => 'required|string|max:255',
            'price' => 'nullable|numeric|min:0|max:99999999.99',
            'barcode' => 'nullable|string|max:100',
            'category' => 'required|string|max:100',
            'unit' => 'required|string|max:100',
            'brand' => 'nullable|string|max:100',
            'specification' => 'nullable|string|max:255',
            'cost_price' => 'nullable|numeric|min:0|max:99999999.99',
            'member_price' => 'nullable|numeric|min:0|max:99999999.99',
            'wholesale_price' => 'nullable|numeric|min:0|max:99999999.99',
            'updated_at' => 'nullable|date',
        ]);

        try {
            $product = $this->productService->upsertFromPos($request->all());

            return response()->json([
                'message' => 'Product synced successfully',
                'data' => [
                    'id' => $product->id,
                    'external_pos_id' => $product->external_pos_id,
                    'code' => $product->code,
                    'barcode' => $product->barcode,
                ]
            ]);
        } catch (\Exception $e) {
            Log::error('Product Sync Failed', ['error' => $e->getMessage(), 'payload' => $request->all()]);
            return response()->json([
                'message' => 'Sync failed: ' . $e->getMessage(),
            ], 500);
        }
    }

    /**
     * 搜尋商品（供外部 API 使用）。
     *
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function index(Request $request)
    {
        $request->validate([
            'product_id' => 'nullable|integer',
            'external_pos_id' => 'nullable|string|max:255',
            'barcode' => 'nullable|string|max:100',
            'code' => 'nullable|string|max:100',
            'category' => 'nullable|string|max:100',
            'updated_after' => 'nullable|date',
            'per_page' => 'nullable|integer|min:1|max:100',
        ]);

        try {
            $perPage = $request->input('per_page', 50);
            $products = $this->productService->searchProducts($request->all(), $perPage);

            return response()->json([
                'status' => 'success',
                'data' => $products->getCollection()->map(function ($product) {
                    return [
                        'id' => $product->id,
                        'code' => $product->code,
                        'barcode' => $product->barcode,
                        'name' => $product->name,
                        'external_pos_id' => $product->external_pos_id,
                        'category_name' => $product->category?->name ?? '未分類',
                        'brand' => $product->brand,
                        'specification' => $product->specification,
                        'unit_name' => $product->baseUnit?->name ?? '個',
                        'price' => (float) $product->price,
                        'cost_price' => (float) $product->cost_price,
                        'member_price' => (float) $product->member_price,
                        'wholesale_price' => (float) $product->wholesale_price,
                        'is_active' => (bool) $product->is_active,
                        'updated_at' => $product->updated_at->format('Y-m-d H:i:s'),
                    ];
                }),
                'meta' => [
                    'current_page' => $products->currentPage(),
                    'last_page' => $products->lastPage(),
                    'per_page' => $products->perPage(),
                    'total' => $products->total(),
                ]
            ]);
        } catch (\Exception $e) {
            Log::error('Product Search Failed', ['error' => $e->getMessage()]);
            return response()->json([
                'status' => 'error',
                'message' => 'Search failed: ' . $e->getMessage(),
            ], 500);
        }
    }
}