<?php

namespace App\Admin\Forms;

use App\Exceptions\BizException;
use App\Models\DealerProduct;
use App\Models\DealerUserProduct;
use App\Models\DealerUserProductLog;
use Dcat\Admin\Contracts\LazyRenderable;
use Dcat\Admin\Traits\LazyWidget;
use Dcat\Admin\Widgets\Form;
use Illuminate\Database\QueryException;
use Illuminate\Support\Facades\DB;
use Throwable;

class DealerEditProduct extends Form implements LazyRenderable
{
    use LazyWidget;

    /**
     * @param Model|Authenticatable|HasPermissions|null $user
     *
     * @return bool
     */
    protected function authorize($user): bool
    {
        return $user->can('dcat.admin.dealers.edit_product');
    }

    /**
     * Handle the form request.
     *
     * @param array $input
     *
     * @return mixed
     */
    public function handle(array $input)
    {
        $id = $this->payload['id'] ?? 0;
        try {
            DB::beginTransaction();
            $product = DealerUserProduct::where([
                'user_id' => $id,
                'product_id'=>$input['product_id'],
                ])->first();
            switch ($input['type']) {
                case DealerUserProductLog::TYPE_ADMIN_IN:
                    if (!$product) {
                        $product = DealerUserProduct::create([
                            'user_id' => $id,
                            'product_id'=>$input['product_id'],
                        ]);
                    }
                    $product->increment('stock', $input['qty']);
                    break;
                case DealerUserProductLog::TYPE_ADMIN_OUT:
                    if (!$product) {
                        throw new BizException('库存不足');
                    }
                    $product->decrement('stock', $input['qty']);
                    break;
            }
            DealerUserProductLog::create([
                'user_id'=> $id,
                'product_id'=> $input['product_id'],
                'type' => $input['type'],
                'qty'=>$input['qty'],
                'remark'=>'后台改动：'.$input['remark'] ?? null,
            ]);
            DB::commit();
        } catch (QueryException $e) {
            DB::rollBack();
            if (strpos($e->getMessage(), 'Numeric value out of range') !== false) {
                $e = new BizException('库存不足');
            }
            throw $e;
        } catch (Throwable $th) {
            DB::rollBack();
            report($th);
            return $this->response()->error('操作失败：'.$th->getMessage());
        }

        return $this->response()
                    ->success(__('admin.update_succeeded'))
                    ->refresh();
    }

    /**
     * Build a form here.
     */
    public function form()
    {
        $this->radio('type', '操作')->options([
            DealerUserProductLog::TYPE_ADMIN_IN =>'添加',
            DealerUserProductLog::TYPE_ADMIN_OUT=>'扣减',
        ])->required();
        $this->select('product_id', '商品')->options(DealerProduct::all()->pluck('name', 'id'))
            ->required();
        $this->number('qty', '数量')->default(1)->min(1);
        $this->text('remark', '备注')->default('调整库存');
    }
}