<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class PersonTarget extends Model
{
    /*
     * Get the signed amount of the target.
     *
     * @return float
     */
    public function signedAmount()
    {
        return $this->amount * $this->ioType->factor;
    }

    /**************************************************************************
     * BOOKINGS                                                               *
     **************************************************************************/
    
    /*
     * Get all bookings associated with a target.
     *
     * @return Illuminate\Database\Eloquent\Collection
     */
    public function bookings()
    {
        return $this->hasMany('\App\SubBooking');
    }
    
    /**************************************************************************
     * IOTYPES                                                                *
     **************************************************************************/

    /*
     * Get the IOType of the target.
     *
     * @return Illuminate\Database\Eloquent\Relations\BelongsTo
     */
    public function ioType()
    {
        return $this->belongsTo('App\IOType');
    }

    /**************************************************************************
     * ACTUALS                                                                *
     **************************************************************************/
    
    /*
     * Get the actuals connected with the target.
     *
     * @return Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function actuals()
    {
        return $this->hasMany('App\SubBooking');
    }

    /*
     * Return the sum of all actuals belonging to this target
     *
     * @return float 
     */
    public function actualsSum() {
        return $this->actuals->each(function ($item, $key) {
            $item['signedAmount'] = $item->signedAmount();
        })->sum('signedAmount');
    }

    /*
     * Get the difference of target and actually payed amount so far. I. e.
     * return the amount still to be payed.
     *
     * @return float
     */
    public function difference() {
        return $this->actualsSum() + $this->signedAmount();
    }
}