<?php

namespace App\Admin\Forms;

use App\Exceptions\BizException;
use App\Models\DrawActivityPrize;
use Dcat\Admin\Contracts\LazyRenderable;
use Dcat\Admin\Traits\LazyWidget;
use Dcat\Admin\Widgets\Form;
use Illuminate\Database\QueryException;

class DrawActivityPrizeStockChange extends Form implements LazyRenderable
{
    use LazyWidget;

    public const TYPE_ADD = 1;
    public const TYPE_SUB = 2;

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

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

        if ($drawActivityPrize->activity->isClosed()) {
            throw new BizException('活动已结束');
        }

        $limited = (bool) $input['limited'];

        try {
            if ($limited) {
                $stock = (int) $input['stock'];

                // 如果限量
                if ($drawActivityPrize->limited) {
                    if ($stock === 0) {
                        throw new BizException('库存不能为0');
                    }

                    $drawActivityPrize->increment('stock', $stock);
                } else {
                    $drawActivityPrize->update([
                        'limited' => $limited,
                        'stock' => $stock,
                    ]);
                }
            } else {
                $drawActivityPrize->update([
                    'limited' => $limited,
                    'stock' => 0,
                ]);
            }
        } catch (QueryException $e) {
            if (strpos($e->getMessage(), 'Numeric value out of range') !== false) {
                $e = new BizException('奖品库存不足');
            }

            throw $e;
        }

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

    /**
     * Build a form here.
     */
    public function form()
    {
        $drawActivityPrize = DrawActivityPrize::findOrFail($this->payload['id']);

        $this->radio('limited', '是否限量')
            ->options([
                0 => '否',
                1 => '是',
            ])
            ->when(1, function () use ($drawActivityPrize) {
                if ($drawActivityPrize->limited) {
                    $this->number('stock', '库存')
                        ->rules(['required_if:limited,1', 'int'], ['required_if' => '不能为空'])
                        ->help('库存大于0时，增加库存；小于0，减少库存')
                        ->setLabelClass(['asterisk']);
                } else {
                    $this->number('stock', '初始库存')
                        ->min(0)
                        ->rules(['required_if:limited,1', 'int', 'min:0'], ['required_if' => '不能为空'])
                        ->setLabelClass(['asterisk']);
                }
            })
            ->value($drawActivityPrize->limited)
            ->customFormat(function ($v) {
                return $v ? 1 : 0;
            })
            ->setLabelClass(['asterisk']);
    }

    public function default()
    {
        return [
        ];
    }
}