<?php

define("BUILD_PATH", dirname(dirname( __DIR__)) . "/build/");
define("AIRTIME_CONF_TEMP_PATH", "/tmp/airtime.conf.temp");

/**
 * Class Setup
 *
 * Abstract superclass for the setup and installation process
 */
abstract class Setup {

    abstract function __construct($settings);

    abstract function runSetup();

    protected function writeToTemp($section, $properties) {
        if (!file_exists(AIRTIME_CONF_TEMP_PATH)) {
            copy(BUILD_PATH . "airtime.example.conf", AIRTIME_CONF_TEMP_PATH);
        }

        $file = file(AIRTIME_CONF_TEMP_PATH);
        $fileOutput = "";

        $inSection = false;

        foreach($file as $line) {
            if(strpos($line, $section) !== false) {
                $inSection = true;
            } else if (strpos($line, "[") !== false) {
                $inSection = false;
            }

            if ($inSection) {
                $key = trim(@substr($line, 0, strpos($line, "=")));
                $fileOutput .= $key && isset($properties[$key]) ? $key . " = " . $properties[$key] . "\n" : $line;
            } else {
                $fileOutput .= $line;
            }
        }

        file_put_contents(AIRTIME_CONF_TEMP_PATH, $fileOutput);
    }

    /**
     * Generates a random string.
     *
     * @param integer $p_len length of the output string
     * @param string $p_chars characters to use in the output string
     * @return string the generated random string
     */
    protected function generateRandomString($p_len=20, $p_chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789') {
        $string = '';
        for ($i = 0; $i < $p_len; $i++)
        {
            $pos = mt_rand(0, strlen($p_chars)-1);
            $string .= $p_chars{$pos};
        }
        return $string;
    }

}

// Import Setup subclasses

require_once('database-setup.php');
require_once('rabbitmq-setup.php');
require_once('general-setup.php');
require_once('media-setup.php');
require_once('finish-setup.php');

// If airtime.conf exists, we shouldn't be here
if (!file_exists("/etc/airtime/airtime.conf")) {
    if (isset($_GET["obj"]) && $objType = $_GET["obj"]) {
        $obj = new $objType($_POST);
        if ($obj instanceof Setup) {
            echo json_encode($obj->runSetup());
        }
    }
}