<?php

namespace Toalett\Redis\Timeseries\Model;

final class Value
{
    private ?string $timestamp;
    private float $value;

    public function __construct(?string $timestamp, float $value)
    {
        $this->timestamp = $timestamp;
        $this->value = $value;
    }

    public static function recordNow(float $value): Value
    {
        return new self(time(), $value);
    }

    public static function auto(float $value): Value
    {
        return new self(null, $value);
    }

    public function getTimestamp(): string
    {
        return $this->timestamp ?? '*';
    }

    public function getValue(): float
    {
        return $this->value;
    }

    public function __toString(): string
    {
        return sprintf('(' . $this->timestamp . ':' . $this->value . ')');
    }
}