<?php
namespace App\Http\Controllers;

use App\Models\ErpSku;
use Illuminate\Http\Request;

class ErpSkuController extends Controller
{
    /**
     * 商品列表
     */
    public function index(Request $request)
    {
        $query = ErpSku::query();

        if ($request->filled('keyword')) {
            $query->where(function ($q) use ($request) {
                $q->where('sku_code', 'like', "%{$request->keyword}%")
                  ->orWhere('name', 'like', "%{$request->keyword}%")
                  ->orWhere('platform_sku', 'like', "%{$request->keyword}%");
            });
        }

        $perPage = $request->input('limit', 15);
        $skus = $query->paginate($perPage);

        return response()->json([
            'code' => 200,
            'data' => [
                'list' => $skus->items(),
                'total' => $skus->total(),
                'current_page' => $skus->currentPage(),
                'last_page' => $skus->lastPage(),
            ],
            'message' => 'success'
        ]);
    }

    /**
     * 创建商品
     */
    public function store(Request $request)
    {
        $request->validate([
            'sku_code' => 'required|unique:erp_skus',
            'name' => 'required',
            'platform_sku' => 'nullable',
            'alias' => 'nullable',
            'price' => 'nullable|numeric',
            'stock' => 'nullable|integer',
        ]);

        $sku = ErpSku::create($request->all());

        return response()->json([
            'code' => 200,
            'data' => $sku,
            'message' => '创建成功'
        ]);
    }

    /**
     * 商品详情
     */
    public function show($id)
    {
        $sku = ErpSku::findOrFail($id);
        return response()->json([
            'code' => 200,
            'data' => $sku,
            'message' => 'success'
        ]);
    }

    /**
     * 更新商品
     */
    public function update(Request $request, $id)
    {
        $sku = ErpSku::findOrFail($id);

        $request->validate([
            'sku_code' => 'sometimes|required|unique:erp_skus,sku_code,' . $id,
            'name' => 'sometimes|required',
            'platform_sku' => 'nullable',
            'alias' => 'nullable',
            'price' => 'nullable|numeric',
            'stock' => 'nullable|integer',
        ]);

        $sku->update($request->all());

        return response()->json([
            'code' => 200,
            'data' => $sku,
            'message' => '更新成功'
        ]);
    }

    /**
     * 删除商品
     */
    public function destroy($id)
    {
        $sku = ErpSku::findOrFail($id);
        $sku->delete();

        return response()->json([
            'code' => 200,
            'message' => '删除成功'
        ]);
    }

    /**
     * 获取所有商品（用于下拉选择）
     */
    public function all()
    {
        $skus = ErpSku::select('id', 'sku_code', 'name', 'price')->get();
        return response()->json([
            'code' => 200,
            'data' => $skus,
            'message' => 'success'
        ]);
    }
}