<?php
namespace Incoviba\Model\Venta;

use DateTimeInterface;
use Incoviba\Common;
use Incoviba\Model\Proyecto\Broker;
use Incoviba\Model\Venta\Promotion\State;
use Incoviba\Model\Venta\Promotion\Type;

class Promotion extends Common\Ideal\Model
{
    public string $description;
    public float $amount;
    public DateTimeInterface $startDate;
    public ?DateTimeInterface $endDate;
    public ?DateTimeInterface $validUntil;
    public Type $type;
    public State $state = State::ACTIVE;

    protected array $contracts;
    public function contracts(): array
    {
        if (empty($this->contracts)) {
            $this->contracts = $this->runFactory('contracts');
        }
        return $this->contracts;
    }

    protected array $units;
    public function units(): array
    {
        if (empty($this->units)) {
            $this->units = $this->runFactory('units');
        }
        return $this->units;
    }

    public function value(float $price): float
    {
        if ($this->type === Type::FIXED) {
            return $price + $this->amount;
        }
        return $price / (1 - $this->amount);
    }

    protected function jsonComplement(): array
    {
        return [
            'description' => $this->description,
            'amount' => $this->amount,
            'start_date' => $this->startDate->format('Y-m-d'),
            'end_date' => $this->endDate?->format('Y-m-d'),
            'valid_until' => $this->validUntil?->format('Y-m-d'),
            'type' => $this->type,
            'state' => $this->state,
            'contracts' => $this->contracts() ?? [],
            'units' => $this->units() ?? []
        ];
    }
}