<?php

namespace Chill\TaskBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * SingleTask
 *
 * @ORM\Table("chill_task.single_task")
 * @ORM\Entity(repositoryClass="Chill\TaskBundle\Repository\SingleTaskRepository")
 */
class SingleTask extends AbstractTask
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var \DateTime
     *
     * @ORM\Column(name="start_date", type="date", nullable=true)
     * @Assert\Date()
     * @Assert\Expression(
     *  "value === null or value < this.getEndDate()",
     *  message="The start date must be before the end date"
     * )
     */
    private $startDate;

    /**
     * @var \DateTime
     *
     * @ORM\Column(name="end_date", type="date", nullable=true)
     * @Assert\Date()
     */
    private $endDate;

    /**
     * @var \DateInterval
     *
     * @ORM\Column(name="warning_interval", type="dateinterval", nullable=true)
     */
    private $warningInterval;
    
    /**
     *
     * @var RecurringTask
     * @ORM\ManyToOne(
     *  targetEntity="RecurringTask",
     *  inversedBy="singleTasks"
     * )
     */
    private $recurringTask;


    /**
     * Get id
     *
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set startDate
     *
     * @param \DateTime $startDate
     *
     * @return SingleTask
     */
    public function setStartDate($startDate)
    {
        $this->startDate = $startDate;

        return $this;
    }

    /**
     * Get startDate
     *
     * @return \DateTime
     */
    public function getStartDate()
    {
        return $this->startDate;
    }

    /**
     * Set endDate
     *
     * @param \DateTime $endDate
     *
     * @return SingleTask
     */
    public function setEndDate($endDate)
    {
        $this->endDate = $endDate;

        return $this;
    }

    /**
     * Get endDate
     *
     * @return \DateTime
     */
    public function getEndDate()
    {
        return $this->endDate;
    }

    /**
     * Set warningInterval
     *
     * @param string $warningInterval
     *
     * @return SingleTask
     */
    public function setWarningInterval($warningInterval)
    {
        $this->warningInterval = $warningInterval;

        return $this;
    }

    /**
     * Get warningInterval
     *
     * @return \DateInterval
     */
    public function getWarningInterval()
    {
        return $this->warningInterval;
    }
    
    /**
     * Get the Warning date, computed from the difference between the 
     * end date and the warning interval
     * 
     * Return null if warningDate or endDate is null
     * 
     * @return \DateTimeImmutable
     */
    public function getWarningDate()
    {
        if ($this->getWarningInterval() === null) {
            return null;
        }
        
        if ($this->getEndDate() === null) {
            return null;
        }
        
        return \DateTimeImmutable::createFromMutable($this->getEndDate())
            ->sub($this->getWarningInterval());
    }
    
    function getRecurringTask(): RecurringTask
    {
        return $this->recurringTask;
    }

    function setRecurringTask(RecurringTask $recurringTask)
    {
        $this->recurringTask = $recurringTask;
    }


}