<?php

namespace App\Admin\Forms;

use App\Admin\Services\OrderService;
use App\Exceptions\BizException;
use App\Models\Order;
use Dcat\Admin\Admin;
use Dcat\Admin\Contracts\LazyRenderable;
use Dcat\Admin\Traits\LazyWidget;
use Dcat\Admin\Widgets\Form;
use Illuminate\Support\Facades\DB;
use Throwable;

class OrderReduce 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.orders.reduce');
    }

    /**
     * Handle the form request.
     *
     * @param array $input
     *
     * @return mixed
     */
    public function handle(array $input)
    {
        $orderId = $this->payload['id'] ?? 0;
        $order = Order::findOrFail($orderId);
        $reduceAmount = $input['reduce_amount']??0;
        //获取调整价格;
        if ($reduceAmount > $order->total_amount) {
            throw new BizException('订单价格无法上浮');
        }
        if ($reduceAmount == $order->total_amount) {
            throw new BizException('调整价格和订单原价格一致，无需调整');
        }
        $orderService = new OrderService();

        $reduced = $order->total_amount-$reduceAmount;
        //判断是否在当前操作人调价权限范围内
        $adminUser = Admin::user();
        if (! $adminUser->isAdministrator() && ! $adminUser->inReduceRange($reduced)) {
            throw new BizException('当前调整价格超出权限范围，请重新确认价格。');
        }

        try {
            DB::beginTransaction();
            $orderService->adminReduceOrder($order, $reduceAmount);
            DB::commit();
        } catch (Throwable $th) {
            DB::rollBack();
            report($th);
            throw new BizException('操作失败：'.$th->getMessage());
        }
        return $this->response()
                    ->success(__('admin.update_succeeded'))
                    ->refresh();
    }

    /**
     * Build a form here.
     */
    public function form()
    {
        $orderId = $this->payload['id'] ?? 0;
        $order = Order::findOrFail($orderId);

        $this->currency('reduce_amount', '调整价格')->symbol('￥')->default(0)->customFormat(function ($V) use ($order) {
            return bcdiv($order->total_amount, 100, 2);
        })->saving(function ($reduceAmount) {
            return bcmul($reduceAmount, 100);
        });

        $this->confirm('是否确认调价？', '该操作不可逆，确认后将更改订单支付价格。');

        $this->disableResetButton();
    }
}