<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Discount extends Model
{
    protected $fillable = [
        "discount_no",
        "name",
        "currency_id",
        "discount_date",
        "is_active",
        "created_at",
        "updated_at"
    ];

    protected $appends = array('amount', 'discount_amount');

    public $timestamps = true;

    public function currency()
    {
        return $this->belongsTo('App\Currency');
    }

    public function getAmountAttribute()
    {
        $amount = 0;
        foreach ($this->products as $product) {
            $amount += $product->pivot->discount_price * $product->pivot->discount_qty;
        }
        return $amount;
    }

    public function getDiscountAmountAttribute()
    {
        $amount = 0;
        foreach ($this->products as $product) {
            $amount += $product->pivot->discount_total;
        }
        return $amount;
    }

    public function products()
    {
        return $this->belongsToMany('App\Product', 'product_discounts')->withPivot([
            "id",
            "discount_price",
            "discount_qty",
            "discount_percent",
            "discount_total",
            "contract_number",
            "invoice_number",
            "invoice_date",
            "tr_number"
        ]);
    }
}