<?php

namespace Blazemedia\Blackhole\Tools;


class DotEnv {

    /**
     * The directory where the .env file can be located.
     *
     * @var string
     */
    protected $path;

    public function __construct(string $path ) {

        if( !file_exists($path) ) {

            throw new \InvalidArgumentException(sprintf('%s does not exist', $path));
        }

        $this->path = $path;
    }

    public function load() :void {

        if (!is_readable($this->path)) {

            throw new \RuntimeException(sprintf('%s file is not readable', $this->path));
        }

        $lines = file($this->path, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);

        foreach ($lines as $line) {

            if (strpos(trim($line), '#') === 0) {
                continue;
            }

            list($name, $value) = explode('=', $line, 2);

            $name  = trim($name);
            $value = trim($value);

            if ( !array_key_exists($name, $_SERVER) && !array_key_exists($name, $_ENV) ) {

                putenv( sprintf('%s=%s', $name, $value) );
                $_ENV[$name] = $value;
                $_SERVER[$name] = $value;
            }
        }
    }
}
