<?php

namespace App\Models;

/**
 * App\Models\ExpressFee
 *
 * @property int $id
 * @property string $base_express_fee 基础运费
 * @property string $free_express_fee 免运费门槛
 * @property int $is_default 是否默认
 * @property \Illuminate\Support\Carbon|null $created_at
 * @property \Illuminate\Support\Carbon|null $updated_at
 * @property-read string $created_at_format 创建时间的格式化
 * @property-read string $status_string 状态名称
 * @property-read string $updated_at_format 更新时间的格式化
 * @method static \Illuminate\Database\Eloquent\Builder|\App\Models\ExpressFee newModelQuery()
 * @method static \Illuminate\Database\Eloquent\Builder|\App\Models\ExpressFee newQuery()
 * @method static \Illuminate\Database\Eloquent\Builder|\App\Models\ExpressFee query()
 * @mixin \Eloquent
 */
class ExpressFee extends BaseModel
{
    public const IS_DEFAULT_FALSE = 0;
    public const IS_DEFAULT_TRUE = 1;
    public const IS_DEFAULT = [
        self::IS_DEFAULT_FALSE => '未使用',
        self::IS_DEFAULT_TRUE => '使用中',
    ];

    /**
     * 获取默认运费模板
     * @return static|null
     */
    public static function getDefaultExpressFee(): ?self
    {
        return self::where('is_default', self::IS_DEFAULT_TRUE)
            ->select(['base_express_fee', 'free_express_fee'])
            ->first();
    }
}