<?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

    /**
     * @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',
    ];

    /**
     * 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(config('settings.order_payment_expires_at')));
    }

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

    /**
     * 此订单是否待付款
     *
     * @return boolean
     */
    public function isPending(): bool
    {
        return $this->status === static::STATUS_PENDING;
    }

    /**
     * 确认此订单是否是待发货
     *
     * @return bool
     */
    public function isPaid(): bool
    {
        return $this->status === static::STATUS_PAID
            && $this->shipping_state === static::SHIPPING_STATE_PENDING;
    }

    /**
     * 确认此订单是否是发货中
     *
     * @return bool
     */
    public function isShipping(): bool
    {
        return $this->status === static::STATUS_PAID
            && $this->shipping_state === static::SHIPPING_STATE_PROCESSING;
    }

    /**
     * 确认此订单是否是已发货
     *
     * @return bool
     */
    public function isShipped(): bool
    {
        return $this->status === static::STATUS_PAID
            && $this->shipping_state === static::SHIPPING_STATE_PROCESSED;
    }

    /**
     * 确认此订单是否是已完成
     *
     * @return bool
     */
    public function isCompleted(): bool
    {
        return $this->status === static::STATUS_COMPLETED;
    }

    /**
     * 确认此订单是否是已取消
     *
     * @return bool
     */
    public function isCancelled(): bool
    {
        return $this->status === static::STATUS_CANCELLED;
    }

    /**
     * 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;
        }

        $seconds = now()->diffInSeconds(
            $this->created_at->addSeconds(config('settings.order_payment_expires_at')), false
        );

        return $seconds > 0 ? $seconds : 0;
    }

    /**
     * 获取订单状态
     *
     * @return int
     */
    public function getOrderStatusAttribute(): int
    {
        // 待付款
        if ($this->isPending()) {
            return OrderStatus::PENDING;
        }

        // 已付款（待发货）
        if ($this->isPaid()) {
            return OrderStatus::PAID;
        }

        // 发货中
        if ($this->isShipping()) {
            return OrderStatus::SHIPPING;
        }

        // 已发货
        if ($this->isShipped()) {
            return OrderStatus::SHIPPED;
        }

        // 已完成
        if ($this->isCompleted()) {
            return OrderStatus::COMPLETED;
        }

        // 已取消
        if ($this->isCancelled()) {
            return OrderStatus::CANCELLED;
        }

        // 其它
        return OrderStatus::UNKNOWN;
    }
}