<?php

namespace App\Models;

use App\Constants\OrderStatus;
use App\Helpers\Numeric;
use Dcat\Admin\Traits\HasDateTimeFormatter;
use EloquentFilter\Filterable;
use Illuminate\Database\Eloquent\Model;

class Order extends Model
{
    use Filterable;
    use HasDateTimeFormatter;

    public const STATUS_PENDING = 0;     // 待付款
    public const STATUS_PAID = 1;        // 已付款
    public const STATUS_COMPLETED = 9;   // 已完成
    public const STATUS_CANCELLED = 10;  // 已取消

    public const SHIPPING_STATE_PENDING = 0; // 待发货
    public const SHIPPING_STATE_PROCESSING = 1; // 发货中
    public const SHIPPING_STATE_PROCESSED = 2; // 已完成

    public const PAY_WAY_ALIPAY = 'alipay';
    public const PAY_WAY_WXPAY = 'wxpay';
    public const PAY_WAY_BALANCE = 'balance';

    /**
     * @var array
     */
    protected $attributes = [
        'reduced_amount' => 0,
        'status' => self::STATUS_PENDING,
    ];

    /**
     * @var array
     */
    protected $casts = [
        'completed_at' => 'datetime',
        'status' => 'int',
    ];

    /**
     * @var array
     */
    protected $fillable = [
        'user_id',
        'sn',
        'user_coupon_id',
        'coupon_discount_amount',
        'vip_discount_amount',
        'reduced_amount',
        'shipping_fee',
        'products_total_amount',
        'total_amount',
        'note',
        'remark',
        'pay_sn',
        'pay_way',
        'pay_at',
        'consignee_name',
        'consignee_telephone',
        'consignee_zone',
        'consignee_address',
        'shipping_state',
        'status',
        'completed_at',
    ];

    /**
     * @var array
     */
    public static $payWayTexts = [
        self::PAY_WAY_ALIPAY => '支付宝',
        self::PAY_WAY_WXPAY => '微信支付',
        self::PAY_WAY_BALANCE => '余额',
    ];

    /**
     * 下单人
     *
     * @return void
     */
    public function user()
    {
        return $this->belongsTo(User::class, 'user_id');
    }

    /**
     * 使用的优惠券
     *
     * @return void
     */
    public function userCoupon()
    {
        return $this->hasOne(UserCoupon::class, 'id', 'user_coupon_id');
    }

    /**
     * 仅查询支付过期的订单
     */
    public function scopeExpired()
    {
        return $this->where('status', static::STATUS_PENDING)->where('created_at', '<=', now()->subSeconds(1800));
    }

    /**
     * 属于此订单的商品
     */
    public function products()
    {
        return $this->hasMany(OrderProduct::class);
    }

    /**
     * 确认此订单是否可以被确认
     *
     * @return bool
     */
    public function isConfirmable(): bool
    {
        return $this->status === static::STATUS_PAID;
    }

    /**
     * 确认此订单是否可以被取消
     *
     * @return bool
     */
    public function isCancelable(): bool
    {
        return in_array($this->status, [static::STATUS_PENDING, static::STATUS_PAID])
            && $this->shipping_state === static::SHIPPING_STATE_PENDING;
    }

    /**
     * 获取订单券优惠金额
     *
     * @return string
     */
    public function getCouponDiscountAmountFormatAttribute()
    {
        return Numeric::trimTrailingZero(bcdiv($this->attributes['coupon_discount_amount'], 100, 2));
    }

    /**
     * 获取订单会员折扣金额
     *
     * @return string
     */
    public function getVipDiscountAmountFormatAttribute()
    {
        return Numeric::trimTrailingZero(bcdiv($this->attributes['vip_discount_amount'], 100, 2));
    }

    /**
     * 获取订单减免金额
     *
     * @return string
     */
    public function getReducedAmountFormatAttribute()
    {
        return Numeric::trimTrailingZero(bcdiv($this->attributes['reduced_amount'], 100, 2));
    }

    /**
     * 获取订单邮费
     *
     * @return string
     */
    public function getShippingFeeFormatAttribute()
    {
        return Numeric::trimTrailingZero(bcdiv($this->attributes['shipping_fee'], 100, 2));
    }

    /**
     * 获取订单支付金额
     *
     * @return string
     */
    public function getTotalAmountFormatAttribute()
    {
        return Numeric::trimTrailingZero(bcdiv($this->attributes['total_amount'], 100, 2));
    }

    /**
     * 获取订单商品总额
     *
     * @return string
     */
    public function getProductsTotalAmountFormatAttribute()
    {
        return Numeric::trimTrailingZero(bcdiv($this->attributes['products_total_amount'], 100, 2));
    }

    /**
     * 待支付订单过期时间
     *
     * @return int
     */
    public function getExpiresAtAttribute()
    {
        if (! $this->isPending()) {
            return 0;
        }

        return now()->diffInSeconds(
            $this->created_at->addSeconds(1800), false
        );
    }

    /**
     * 获取订单状态
     *
     * @return int
     */
    public function getOrderStatusAttribute(): int
    {
        $status = OrderStatus::UNKNOWN;

        if ($this->status === static::STATUS_PENDING) {
            $status = OrderStatus::PENDING;
        } elseif ($this->status === static::STATUS_PAID) {
            switch ($this->shipping_state) {
                case static::SHIPPING_STATE_PENDING:
                    $status = OrderStatus::PAID;
                    break;

                case static::SHIPPING_STATE_PROCESSING:
                    $status = OrderStatus::SHIPPING;
                    break;

                case static::SHIPPING_STATE_PROCESSED:
                    $status = OrderStatus::SHIPPED;
                    break;
            }
        } elseif ($this->status === static::STATUS_COMPLETED) {
            $status = OrderStatus::COMPLETED;
        } elseif ($this->status === static::STATUS_CANCELLED) {
            $status = OrderStatus::CANCELLED;
        }

        return $status;
    }
}