<?php

namespace App\Admin\Forms;

use App\Models\ProductGift;
use App\Models\ProductSku;
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 SkuGift extends Form implements LazyRenderable
{
    use LazyWidget;

    /**
     * Handle the form request.
     *
     * @param array $input
     *
     * @return mixed
     */
    public function handle(array $input)
    {
        $giftSkuIds = [];
        $giftSku = [];
        $delGiftIds = [];
        foreach ($input['gifts'] as $gift) {
            if ($gift['_remove_'] == 1) {
                $delGiftIds[] = $gift['id'];
            } else {
                $giftSku[] = new ProductGift($gift);
            }
        }
        $skuId = $input['sku_id'];
        $sku = ProductSku::findOrFail($skuId);
        try {
            DB::beginTransaction();
            $sku->gifts()->saveMany($giftSku);

            ProductGift::whereIn('id', $delGiftIds)->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()
    {
        $id = $this->payload['id'] ?? 0;
        $sku = ProductSku::with('gifts')->findOrFail($id);

        $this->hasMany('gifts', function (NestedForm $form) {
            $form->select('gift_sku_id')->options(function ($id) {
                $sku = ProductSku::find($id);
                if ($sku) {
                    return [$sku->id => $sku->name];
                }
            })->ajax(admin_route('api.product_skus'))->required();
            $form->number('num')->default(1);
            $form->number('limit')->default(0);
        })->customFormat(function () use ($sku) {
            return $sku->gifts;
        });
        $this->hidden('sku_id')->value($id);
    }
}