<?php
namespace Biukop;

class StorageClass
{
    private $path;

    private $oauth2 = [];
    private $oauth2state = "";
    function __construct() {
        $this->path = dirname(__FILE__) .  "/xero.json";
        // \Carbon_Fields\Carbon_Fields::boot();
        // if( !isset($_SESSION) ){
        // 	$this->init_session();
        // }
    }

    public function read_value() {
        $this->oauth2state =  carbon_get_theme_option("xero_oauth2state");
        $this->oauth2["token"] = carbon_get_theme_option("xero_token");
        $this->oauth2["refresh_token"] = carbon_get_theme_option("xero_refresh_token");
        $this->oauth2["expires"] = carbon_get_theme_option("xero_expires");
        $this->oauth2["tenant_id"] = carbon_get_theme_option("xero_tenant_id");
        $this->oauth2["id_token"] = carbon_get_theme_option("xero_id_token");

        $this->oauth2['expires_human'] = $this->getExpiresHuman($this->oauth2["expires"]);
    }

    public function init_session(){
        // session_start();
    }

    public function getSession() {
        return $this->oauth2;
        // return $_SESSION['oauth2'];
    }

    private function write_json() {
        $serialize = [
            "oauth2state" => $this->getOauth2State(),
            "oauth2" => $this->oauth2,
        ];
        file_put_contents($this->path , json_encode($serialize));
    }

    public function startSession($token, $secret, $expires = null)
    {
        // session_start();
    }

    public function setToken($token, $expires = null, $tenantId, $refreshToken, $idToken)
    {
        // $_SESSION['oauth2'] = [
        //     'token' => $token,
        //     'expires' => $expires,
        //     'tenant_id' => $tenantId,
        //     'refresh_token' => $refreshToken,
        //     'id_token' => $idToken
        // ];

        $this->oauth2 = [
            'token' => $token,
            'expires' => $expires,
            'tenant_id' => $tenantId,
            'refresh_token' => $refreshToken,
            'id_token' => $idToken,
            'expires_human' => $this->getExpiresHuman($expires)
        ];

        carbon_set_theme_option("xero_token", $token);
        carbon_set_theme_option("xero_refresh_token", $refreshToken);
        carbon_set_theme_option("xero_expires", $expires);
        carbon_set_theme_option("xero_tenant_id", $tenantId);
        carbon_set_theme_option("xero_id_token", $idToken);
        carbon_set_theme_option("xero_expires_human", $this->getExpiresHuman($expires));

        $this->write_json();
    }

    public function getOauth2State() {
        $this->oauth2state =  carbon_get_theme_option("xero_oauth2state");
        return $this->oauth2state;
    }

    public function setOauth2State($state) {
        $this->oauth2state = $state;
        carbon_set_theme_option("xero_oauth2state", $state);
        $this->write_json();
    }

    public function tokenExpiresHumanRedable(){
        return $this->oauth2['expires_human'];
    }
    private function getExpiresHuman($time_stamp) {
        $expire = date("Y-m-d H:i:s", $time_stamp);
        $utc_date = \DateTime::createFromFormat(
            "Y-m-d H:i:s",
            $expire,
            new \DateTimeZone('UTC')
        );

        $sydney_date = $utc_date;
        $sydney_date->setTimeZone(new \DateTimeZone('Australia/Sydney'));
        $str = $sydney_date->format("Y-m-d H:i:s");
        return $str;
    }

    public function getToken()
    {
        //If it doesn't exist or is expired, return null
        // if (empty($this->getSession())
        //     || ($_SESSION['oauth2']['expires'] !== null
        //     && $_SESSION['oauth2']['expires'] <= time())
        // ) {
        //     return null;
        // }
        // return $this->getSession();

        if ( $this->oauth2['expires'] !== null && $this->oauth2['expires'] <= time() ) {
            return null;
        }
        return $this->oauth2;
    }

    public function getAccessToken()
    {
        //return $_SESSION['oauth2']['token'];
        return $this->oauth2['token'];
    }

    public function getRefreshToken()
    {
        // return $_SESSION['oauth2']['refresh_token'];
        return $this->oauth2['refresh_token'];
    }

    public function getExpires()
    {
        //return $_SESSION['oauth2']['expires'];
        return $this->oauth2['expires'];
    }

    public function getXeroTenantId()
    {
        //return $_SESSION['oauth2']['tenant_id'];
        return $this->oauth2['tenant_id'];
    }

    public function getIdToken()
    {
        // return $_SESSION['oauth2']['id_token'];
        return $this->oauth2['id_token'];
    }

    public function getHasExpired()
    {
        if (!empty($this->getSession()))
        {
            if(time() > $this->getExpires())
            {
                return true;
            } else {
                return false;
            }
        } else {
            return true;
        }
    }
}
?>