<?php

namespace App\Admin\Forms;

use App\Models\DealerProduct;
use App\Models\DealerProductSaleRule as DealerProductSaleRuleModel;
use Dcat\Admin\Contracts\LazyRenderable;
use Dcat\Admin\Form\NestedForm;
use Dcat\Admin\Traits\LazyWidget;
use Dcat\Admin\Widgets\Form;
use Illuminate\Support\Facades\DB;
use Throwable;

class DealerProductSaleRule extends Form implements LazyRenderable
{
    use LazyWidget;

    /**
     * 权限判断，如不需要可以删除此方法
     *
     * @param Model|Authenticatable|HasPermissions|null $user
     *
     * @return bool
     */
    protected function authorize($user): bool
    {
        return $user->can('dcat.admin.dealer_products.sale_rules');
    }

    /**
     * Handle the form request.
     *
     * @param array $input
     *
     * @return mixed
     */
    public function handle(array $input)
    {
        $productId = $this->payload['id'] ?? 0;

        $product = DealerProduct::findOrFail($productId);
        $saleRules = [];
        $delRules = [];
        foreach ($input['saleRules'] as $rule) {
            if ($rule['_remove_'] == 1) {
                $delRules[] = $rule['id'];
            } else {
                if (is_null($rule['id'])) {
                    $saleRules[] = new DealerProductSaleRuleModel($rule);
                } else {
                    $_rule = DealerProductSaleRuleModel::find($rule['id']);
                    $_rule['qty'] = $rule['qty'];
                    $_rule['price'] = $rule['price'];
                    $saleRules[] = $_rule;
                }
            }
        }

        try {
            DB::beginTransaction();
            $product->saleRules()->saveMany($saleRules);

            DealerProductSaleRuleModel::whereIn('id', $delRules)->delete();
            DB::commit();
        } catch (Throwable $th) {
            DB::rollBack();
            report($th);
            return $this->response()->error('操作失败:'.$th->getMessage())->refresh();
        }

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

    /**
     * Build a form here.
     */
    public function form()
    {
        $this->hasMany('saleRules', '销售规则', function (NestedForm $form) {
            $form->number('qty', '达到数量')->min(0);
            $form->currency('price', '进货单价')->symbol('￥');
        });
    }

    /**
     * The data of the form.
     *
     * @return array
     */
    public function default()
    {
        $productId = $this->payload['id'] ?? 0;

        $product = DealerProduct::findOrFail($productId);
        return [
            'saleRules'  => $product->saleRules,
        ];
    }
}