<?php

namespace App\Admin\Forms;

use App\Models\ProductSku;
use App\Models\ProductSpu;
use App\Models\ProductSpuSpec;
use Dcat\Admin\Contracts\LazyRenderable;
use Dcat\Admin\Traits\LazyWidget;
use Dcat\Admin\Widgets\Form;
use Illuminate\Support\Facades\DB;
use Throwable;

class AddSku 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.product_spus.add_sku');
    }

    /**
     * Handle the form request.
     *
     * @param array $input
     *
     * @return mixed
     */
    public function handle(array $input)
    {
        if ($input) {
            $spuId = $this->payload['spu_id'] ?? 0;
            $_skuSpecs = [];
            $_price = 0;
            foreach ($input as $id => $value) {
                $spuSpec = ProductSpuSpec::where('id', $id)->first();
                foreach ($spuSpec->items as $item) {
                    if ($item['name'] == $value) {
                        $_skuSpecs[$id] = $item['name'];
                        $_price += $item['value'];
                    }
                }
            }
            //如果存在该规格组合
            $skuQuery = ProductSku::where('spu_id', $spuId);
            foreach ($_skuSpecs as $id=> $spec) {
                $skuQuery->where('specs->'.$id, $spec);
            }
            if ($skuQuery->first()) {
                return $this->response()->error(__('admin_message.forms.add_sku.errors.has_specs'));
            } else {
                $spu = ProductSpu::findOrFail($spuId);
                try {
                    DB::beginTransaction();
                    ProductSku::createBySpec([
                        'specs'=>$_skuSpecs,
                        'price'=>$_price,
                    ], $spu);
                    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()
    {
        $spuId = $this->payload['spu_id'] ?? 0;

        $spu = ProductSpu::findOrFail($spuId);
        foreach ($spu->specs as $spec) {
            $this->select($spec->id, $spec->name)->options(function () use ($spec) {
                return collect($spec->items)->pluck('name', 'name');
            })->required();
        }
        $this->disableResetButton();
    }

    /**
     * The data of the form.
     *
     * @return array
     */
    public function default()
    {
        return [
            // 'name'  => 'John Doe',
            // 'email' => 'John.Doe@gmail.com',
        ];
    }
}