<?php

namespace MGModule\DNSManager2\mgLibs\custom\dns\submodules;

use MGModule\DNSManager2\mgLibs\custom\dns;
use MGModule\DNSManager2\mgLibs\custom\dns\exceptions;
use MGModule\DNSManager2\mgLibs\custom\dns\interfaces;
use MGModule\DNSManager2\mgLibs\custom\dns\interfaces\SubmoduleDNSSecInterface;
use \Exception;

class Cloudflare extends dns\SubmoduleAbstract implements
interfaces\SubmoduleIPInterface, interfaces\SubmoduleTTLInterface, interfaces\SubmoduleImportInterface,SubmoduleDNSSecInterface
{

    protected $hostname    = 'https://api.cloudflare.com/client/v4/';
    public $configFields   = array(
        'email' => array(
            'friendlyName' => 'Email',
            'validators'   => array(
                'required' => 'required',
            )
        ),
        'key'   => array(
            'friendlyName' => 'API Key',
            'type'         => 'password'
        ),
        'token' => [
            'friendlyName' => 'API Token',
            'type'         => 'password'
        ],
        'proxied' =>array (
                'friendlyName'  =>  'Enable Proxy Option For Records',
                'type'=> 'yesno',
                'help' => 'For A, AAAA, CNAME records only',
        ),
    );
    public $availableTypes = ['A', 'AAAA', 'CAA', 'CNAME', 'DS', 'MX', 'NS', 'SRV', 'TXT'];
    protected $zoneid;
    protected $zoneObj;

    public function testConnection()
    {
        $info = $this->get( 'user', array() );

        return $info->result ? true : false;
    }



    public function zoneExists()
    {
        try {
            $zone = $this->getZone( $this->domain );
        } catch (exceptions\DNSSubmoduleException $e) {
            if ( $e->getCode() == dns\SubmoduleExceptionCodes::COMMAND_ERROR )
            {
                return false;
            }

            throw $e;
        }

        return ($zone) ? true : false;
    }

    public function getNameServers($index = false)
    {
        $zone = $this->getZone($this->domain);

        return $zone->name_servers;
    }

    public function getRecords( $recordType = false )
    {
        $out = $this->getAllRecords();

        $return = [];
        foreach( $out as $item )
        {
            $item->name = rtrim($item->name,'.').'.';
            $type       = strtoupper((string)$item->type);
            if( in_array($type, $recordType !== false ? [strtoupper($recordType)] : $this->getAvailableRecordTypes(),true) )
            {
                switch( $type )
                {
                    case 'MX':
                        $record                    = dns\record\Record::tryToCreateFromArray((array)$item);
                        $record->line              = (string)$item->id;
                        $record->rdata->preference = $item->priority;
                        $record->rdata->exchange   = $item->content;

                        $return[] = $record;
                        break;

                    case 'SRV':
                        $record                  = dns\record\Record::tryToCreateFromArray((array)$item);
                        $record->line            = (string)$item->id;
                        $record->rdata->port     = $item->data->port;
                        $record->rdata->weight   = $item->data->weight;
                        $record->rdata->priority = $item->data->priority;
                        $record->rdata->target   = $item->data->target;
                        $record->name            = $item->data->service . '.' . $item->data->proto . '.' . $item->data->name;
                        $record->absoluteName    = false;

                        $return[] = $record;
                        break;
                    case 'DS':
                        $record       = dns\record\Record::tryToCreateFromArray((array)$item);
                        $record->line = (string)$item->id;
                        $rdata        = new dns\record\type\DS();
                        list($rdata->keytag, $rdata->algorithm, $rdata->digesttype, $rdata->digest) = explode("\t", $item->content);
                        $record->rdata = $rdata;
                        $return[]      = $record;
                        break;
                    default:
                        $record       = dns\record\Record::tryToCreateFromArray((array)$item);
                        $record->line = (string)$item->id;
                        $record->rdata->fromString((string)$item->content);

                        $return[] = $record;
                }
            }
        }

        return $return;
    }

    public function processRecodParams( $record )
    {
        $params = $this->proccessMainRecordParams( $record );
        $method = 'process' . $record->type . 'RecordParams';
        $params['proxied'] = $this->isProxyEnabled();
        if ( method_exists( $this, $method ) )
        {
            $this->$method( $record, $params );
        }

        return $params;
    }



    public function proccessMainRecordParams( $record )
    {
        $record->recordName = $record->name;
        return array(
            'zone'     => $this->domain,
            'name'     => $record->nameToAbsolute( $this->domain, false ),
            'ttl'      => (int)$record->ttl,
            'type'     => $record->type,
            'priority' => (int)$record->rdata->priority,
            'content'  => $record->rdata->toString(),
        );
    }

    public function processDSRecordParams( $record, &$params )
    {
        /** @var dns\record\type\DS $rdata */
        $rdata = $record->rdata;
        unset($params['content']);
        $params['data'] = [
            'key_tag'=>(int)$rdata->keytag,
            'algorithm'=>(int)$rdata->algorithm,
            'digest_type'=>(int)$rdata->digesttype,
            'digest'=>$rdata->digest
        ];
    }

    public function processNSRecordParams( $record, &$params )
    {
        $params['proxied']  = false; //cannot be proxied
    }
    
    public function processTXTRecordParams( $record, &$params )
    {
        $params['proxied']  = false; //cannot be proxied
        $params['content']  = trim($params['content'], '"');
    }

    public function processMXRecordParams( $record, &$params )
    {
        $params['content']  = $record->rdata->exchange;
        $params['priority'] = (int)$record->rdata->preference;
        $params['proxied']  = false; //cannot be proxied
    }



    public function processSRVRecordParams( $record, &$params )
    {
        $params['name'] = $record->recordName;
        $elemnts = $this->getSRVElements($record);
        
        $params['data'] = array(
            'name'     => $elemnts->name, // . $chunks[3],
            'priority' => (int)$record->rdata->priority,
            'weight'   => (int)$record->rdata->weight,
            'port'     => (int)$record->rdata->port,
            'target'   => $record->rdata->target,
            'service'  => $elemnts->service,
            'proto'    => $elemnts->proto
        );
        $params['proxied']  = false; //cannot be proxied
    }


    
    private function getSRVElements( $record )
    {
        $chunks           = explode( '.', $record->recordName );
        $elemnts          = new \stdClass();
        $elemnts->service = $chunks[0];
        $elemnts->proto   = $chunks[1];
        unset( $chunks['0'], $chunks[1] );

        $elemnts->name = (empty( $chunks )) ? $this->domain : implode( '.', $chunks );

        return $elemnts;
    }



    public function addRecord( dns\record\Record $record )
    {
        $params = $this->processRecodParams( $record );

        $this->get( $this->getZoneUrl( $this->getZoneID(), array('dns_records') ), $this->setPOSTparams( $params ), 'POST');

        sleep( 10 );
    }



    public function editRecord( dns\record\Record $record )
    {
        $recordid = $record->line;

        $params = $this->processRecodParams( $record );
        $this->get( $this->getZoneUrl( $this->getZoneID(), array('dns_records', $recordid) ), $this->setPOSTparams( $params ), 'PUT' );

        sleep( 20 );
    }



    public function deleteRecord( dns\record\Record $record )
    {
        $this->get( $this->getZoneUrl( $this->getZoneID(), array('dns_records', $record->line) ), array(), 'DELETE' );

        sleep( 10 );
    }



    public function activateZone()
    {
        $this->get( 'zones', $this->setPOSTparams( array('name' => $this->domain, 'jump_start' => false) ), 'POST' );

        //Wait 10 seconds for cloudflare
        sleep( 10 );
    }



    public function terminateZone()
    {
        $this->get( $this->getZoneUrl( $this->getZoneID() ), array(), 'DELETE' );
    }



    public function getZones()
    {
        $out    = $this->getAllZones();
        $return = array();
        foreach ($out as $item) {
            $return[(string) $item->name] = (string) $item->name;
        }

        return $return;
    }



    public function getZone( $zone )
    {
        try {

            if ( !empty( $this->zoneObj[$zone] ) )
            {
                return $this->zoneObj[$zone];
            }

            $out = $this->get( 'zones', $this->setGETParams( array('name' => $zone) ) );

            $this->zoneObj[$zone] = $out->result[0];
        } catch (Exception $ex) {
            
        }

        return $this->zoneObj[$zone];
    }



    public function getZoneID()
    {
        if ( $this->zoneid )
        {
            return $this->zoneid;
        }

        $this->zoneid = $this->getZone( $this->domain )->id;

        return $this->zoneid;
    }



    protected function setGETParams( $params )
    {
        return array('GET' => $params);
    }



    protected function setPOSTparams( $params )
    {
        return array('POST' => $params);
    }



    protected function getZoneUrl( $zoneid, $additional = array() )
    {
        if ( !empty( $additional ) )
        {
            $addurl = '';
            foreach ($additional as $value) {
                $addurl .= '/' . $value;
            }
        }

        return 'zones/' . $zoneid . $addurl;
    }



    public function processURL( $url, $get = array() )
    {
        if ( !empty( $get ) )
        {
            $additional = '?' . http_build_query( $get );
        }

        return $this->hostname . $url . $additional;
    }



    private function get( $function, $params = array(), $type = 'GET', $debug = false )
    {
        $query = $this->processURL( $function, $params['GET'] );

        $curl = curl_init();
        curl_setopt( $curl, CURLOPT_URL, $query );
        curl_setopt( $curl, CURLOPT_SSL_VERIFYPEER, 0 );
        curl_setopt( $curl, CURLOPT_SSL_VERIFYHOST, 0 );
        curl_setopt( $curl, CURLOPT_HEADER, 0 );
        curl_setopt( $curl, CURLOPT_TIMEOUT, 999 );
        curl_setopt( $curl, CURLOPT_RETURNTRANSFER, 1 );

        if ( $type )
        {
            curl_setopt( $curl, CURLOPT_CUSTOMREQUEST, $type );
        }

        if( trim($this->config['token']) )
        {
            $auth = [
                'Authorization: Bearer ' . $this->config['token'],
                'Content-Type: application/json'
            ];
        }
        else
        {
            $auth = [
                'X-Auth-Email: ' . $this->config['email'],
                'X-Auth-Key: ' . $this->config['key'],
                'Content-Type: application/json'
            ];
        }

        curl_setopt( $curl, CURLOPT_HTTPHEADER, $auth );

        $post = (empty( $params['POST'] )) ? array() : $params['POST'];
        curl_setopt( $curl, CURLOPT_POST, 1 );
        curl_setopt( $curl, CURLOPT_POSTFIELDS, json_encode( $post ) );

        $result = curl_exec( $curl );



        if ( $debug )
        {
            echo("<pre>" . print_r( (__LINE__ . ': ' ), true ) . print_r( $query, true ) . "</pre>");
            echo("<pre>" . print_r( (__LINE__ . ': ' ), true ) . print_r( $params, true ) . "</pre>");
            die( "<pre>" . print_r( __FILE__, true ) . print_r( __LINE__, true ) . "</pre><pre>" . print_r( $result, true ) . "</pre>" );
        }

        $out = $this->checkForErrors($curl, $result);

        curl_close( $curl );

        return $out;
    }



    private function checkForErrors( $curl, $result )
    {

        if ( curl_errno( $curl ) )
        {
            throw new exceptions\DNSSubmoduleException( "cURL Error: " . curl_errno( $curl ) . " - " . curl_error( $curl ), dns\SubmoduleExceptionCodes::CONNECTION_PROBLEM );
        }

        if ( !$result )
        {
            throw new exceptions\DNSSubmoduleException( 'Unable to retrieve response', dns\SubmoduleExceptionCodes::CONNECTION_PROBLEM );
        }

        $obj = json_decode( $result );


        if ( empty( $obj ) )
        {
            throw new exceptions\DNSSubmoduleException( 'Unable to parse response', dns\SubmoduleExceptionCodes::INVALID_RESPONSE );
        }


        if ( !$obj->success )
        {
            //$error = (isset( $obj->errors ) && !empty( $obj->errors )) ? (is_array( $obj->errors )) ? $obj->errors[0]->message : $obj->errors->message :
                   // $obj->message;
            if(!empty($obj->error))
            {
                $error = $obj->error;
            }
            elseif(isset( $obj->errors ) && !empty( $obj->errors ))
            {
                if(is_array( $obj->errors ))
                {
                    $error = $obj->errors[0]->message.(is_array($obj->errors[0]->error_chain) ? ': '.$obj->errors[0]->error_chain[0]->message : '');
                }
                else
                {
                    $error = $obj->errors->message;
                }
            }
            else
            {
                $obj->message;
            }

            throw new exceptions\DNSSubmoduleException( $error, dns\SubmoduleExceptionCodes::COMMAND_ERROR );
        }

        return $obj;
    }

    private function isProxyEnabled()
    {
        return $this->config['proxied'] === 'on';
    }


    /**
     * Get sign keys
     */
    public function getSignKeys()
    {
        $dnssec = new dns\dnssec\DnsSec();
        $zoneid = $this->getZoneID();
        $result = json_decode($this->get('zones/' . $zoneid . '/dnssec'));

        foreach ( $result->result as $record )
        {
            $ds = new dns\record\type\DS();
            $ds->setKeytag($record->key_tag);
            $ds->setAlgorithm($record->algorithm);
            $ds->setDigestType($record->digest_type);
            $ds->setDigest($record->digest);
            $dnssec->addDs($ds);

            //CSK
            $dsSplitted = explode(' ', $record->ds);

            $dnskey = new dns\record\type\DNSKEY();
            $dnskey->setFlags($record->flags);
            $dnskey->setProtocol($dsSplitted[2]);
            $dnskey->setAlgorithm($record->algorithm);
            $dnskey->setPublicKey($record->public_key);

            $csk = new dns\dnssec\CSK();
            $csk->setId($dsSplitted[4]);
//			$csk->setBits();
            $csk->setDnsKey($dnskey);
            $csk->setLifetime($dsSplitted[1]);
            $dnssec->addKey($csk);
        }
        return $dnssec;
    }

    /**
     * Sign DNS zone
     */
    public function sign()
    {
        $this->changeStatus(true);
    }

    public function changeStatus( $status = true )
    {
        $status = $status ? 'active' : 'disabled';

        $zoneid = $this->getZoneID();

        $params['POST'] = [
            'status' => $status
        ];

        $this->get('zones/' . $zoneid . '/dnssec', $params, 'PATCH');
    }

    /**
     * Unsign DNS zone
     */
    public function unsign()
    {
        $this->changeStatus(false);
    }

    /**
     * Rectify DNS zone
     */
    public function rectify()
    {
        // TODO: Implement rectify() method.
    }

    /**
     *
     */
    public function isSigned()
    {
        try
        {
            $zoneid   = $this->getZoneID();
            $response = json_decode($this->get('zones/' . $zoneid . '/dnssec'));

            if ( isset($response->result) )
            {
                $status = ($response->result->status == 'active' ? true : false);
            }
            else
            {
                throw new Exception('There was problem with getting response from cloudflare');
            }
            return $status;
        }
        catch (\Exception $e)
        {
            return false;
        }
    }

    private function getAllZones()
    {
        $page = 1;
        $out  = [];
        while( $zones = $this->get('zones', $this->setGETParams(['per_page' => 100, 'page' => $page]))->result )
        {
            $out = array_merge($out, $zones);
            $page++;
        }

        return $out;
    }

    private function getAllRecords()
    {
        $page = 1;
        $out  = [];
        while( $records = $this->get($this->getZoneUrl($this->getZoneID(), ['dns_records']), ['GET' => ['per_page' => 100, 'page' => $page]])->result )
        {
            $out = array_merge($out, $records);
            $page++;
        }

        return $out;
    }
}