<?php

namespace CrazyFactory\Jobs;

use CrazyFactory\Jobs\Utils\Format;

class JobResult
{
    protected $code;
    protected $output;
    protected $start = 0;
    protected $end = 0;

    /**
     * JobResult constructor.
     *
     * @param       $code
     * @param int   $start
     * @param int   $end
     * @param array $output
     */
    public function __construct($code, $start = 0, $end = 0, array $output = [])
    {
        $this->code = $code;
        $this->start = $start;
        $this->end = $end;
        $this->output = $output;
    }

    /**
     * @param string $message
     * @param int    $code
     *
     * @return JobResult
     */
    public static function fatal($message = "encountered an unknown error", $code = 255)
    {
        echo "FATAL: " . $message . "\n";

        return new JobResult($code, 0, 0, ["FATAL: " . $message]);
    }

    /**
     * @return mixed
     */
    public function getCode()
    {
        return $this->code;
    }

    /**
     * @param int $lineLimit
     *
     * @return array
     */
    public function getLastParagraph($lineLimit = 20)
    {
        $result = [];

        if (!$this->hasOutput()) {
            return $result;
        }

        $lines = $this->getOutput();

        // remove blank lines from the end of the array
        while (!empty($lines) && trim(end($lines)) === '') {
            array_pop($lines);
        }

        // take lines until the next blank line
        $count = 0;
        while (!empty($lines) && trim(end($lines)) !== '' && $count < $lineLimit) {
            $result[] = array_pop($lines);
            $count++;
        }

        return array_reverse($result);
    }

    /**
     * @return bool
     */
    public function hasOutput()
    {
        return !empty($this->output);
    }

    /**
     * @return string[]
     */
    public function getOutput()
    {
        return array_slice($this->output, 0);
    }

    /**
     * @return string|null
     */
    public function getLastLine()
    {
        return end($this->output);
    }

    /**
     * @return int
     */
    public function getStart()
    {
        return $this->start;
    }

    /**
     * @return int
     */
    public function getEnd()
    {
        return $this->end;
    }

    /**
     * @return string
     */
    public function getDurationFormatted()
    {
        return Format::secondsToTimeElapsedString($this->getDuration());
    }

    /**
     * @return int
     */
    public function getDuration()
    {
        return $this->end - $this->start;
    }
}