<?php

namespace App\Helpers;


use Carbon\Carbon;
use InvalidArgumentException;

class LengthFormatter
{
    /**
     * @string length
     */
    private $_length;

    // @param string $length formatted H:i:s.u (can be > 24 hours)
    public function __construct($length)
    {
        $this->_length = $length;
    }

    public function toSeconds() {
        if (!preg_match('/^[0-9]{2}:[0-9]{2}:[0-9]{2}/', $this->_length)) {
            return $this->_length;
        }

        $pieces = explode(':', $this->_length);

        $hours = $minutes = 0;
        if (intval($pieces[0]) !== 0) {
            $hours = intval(ltrim($pieces[0], '0')) * 3600;
        }
        if (intval($pieces[1]) !== 0) {
            $minutes = intval(ltrim($pieces[1], '0')) * 60;
        }

        return $hours + $minutes + floatval($pieces[2]);
    }

    public function format()
    {
        if (!preg_match('/^[0-9]{2}:[0-9]{2}:[0-9]{2}/', $this->_length)) {
            return $this->_length;
        }

        $pieces = explode(':', $this->_length);

        $seconds = round($pieces[2], 1);
        $seconds = number_format($seconds, 1);
        [$seconds, $milliStr] = explode('.', $seconds);

        if (intval($pieces[0]) !== 0) {
            $hours = ltrim($pieces[0], '0');
        }

        $minutes = $pieces[1];
        // length is less than 1 hour
        if (!isset($hours)) {
            if (intval($minutes) !== 0) {
                $minutes = ltrim($minutes, '0');
            }
            // length is less than 1 minute
            else {
                unset($minutes);
            }
        }

        if (isset($hours, $minutes, $seconds)) {
            $time = sprintf('%d:%02d:%02d.%s', $hours, $minutes, $seconds, $milliStr);
        } elseif (isset($minutes, $seconds)) {
            $time = sprintf('%d:%02d.%s', $minutes, $seconds, $milliStr);
        } else {
            $time = sprintf('%d.%s', $seconds, $milliStr);
        }

        return $time;
    }


    public static function generateStringTimeFilled(Carbon $showStartDate, Carbon $showEndDate): string
    {
        $interval = $showEndDate->diff($showStartDate);

        return sprintf(
            "%d years %d mons %d days %d hours %d mins %.1f secs",
            $interval->y,
            $interval->m,
            $interval->d,
            $interval->h,
            $interval->i,
            $interval->s
        );
    }

    public static function contentLengthToSeconds(string $contentLength): float|int
    {

        // Initialize total seconds
        // Use regex to extract hours, minutes, seconds, and milliseconds
        preg_match('/(\d+):(\d+):([\d.]+)/', $contentLength, $matches);

        if (!$matches) {
            throw new InvalidArgumentException("Invalid time format");
        }

        // Extract components
        $hours = (int)$matches[1];
        $minutes = (int)$matches[2];
        $seconds = (float)$matches[3]; // Includes fractional seconds

        // Convert everything to total seconds
        $totalSeconds = ($hours * 3600) + ($minutes * 60) + $seconds;

        return $totalSeconds;
    }
}