<?php
namespace Biukop;

use \XeroPHP\Application\PrivateApplication;
use \XeroPHP\Remote\Exception\RateLimitExceededException; 
use \XeroPHP\Remote\Exception\NotFoundException;

class Xero {
    private $xero;
    private $clientgroup="48646f3d-cf5e-4fea-8c8b-5812bd540e1b";
    private $minimum_sync_interval_in_seconds = 600;
    
    private function default_config(){
        $config = array(
            'oauth' => [
                'callback' => 'http://acaresydney.com.au/',
                'consumer_key' => 'G6AJIRWTH0X3C5SVS3ETZXNFCMDNGG',
                'consumer_secret' => 'LP0PTSBCJLBB4CGYYKOHDXYF2NWXWD',
                'rsa_private_key' => 'file://' . dirname(__FILE__) . '/keys/privatekey.pem',
            ],
        );
        return $config;
    }
    private function office_config(){
        $office_config = [
            'xero'  => [
                // 'payroll_version' =>'1.9',
            ],
            'curl' => [
                CURLOPT_USERAGENT =>'AcareSydneyWebOffice',
            ],
            'oauth' => [
                'callback' => 'http://acaresydney.com.au/',
                'consumer_key' => 'JE4LWKCJ6NHED30RFZWCT7WQYTS8JD',
                'consumer_secret' => 'JXVZAZWKGM7MLUZSVIMK7ZSJE9GNYQ',
                'rsa_private_key' => 'file://' . dirname(__FILE__) . '/keys/privatekey.pem',
            ],
        ];
        return $office_config;
    }
    
    public function __construct(){
       $this->xero = new PrivateApplication($this->office_config());
    }
    
    public function getClients($contact_group_id){
        $xero = $this->xero;
        $cg = $xero->loadByGUID("Accounting\\ContactGroup", $contact_group_id);
        $contacts = $cg->getContacts();
        return $contacts;
    }
    
    public function getContact($id){
        $user = $this->xero->loadByGUID("Accounting\\Contact",$id);
        return $user;
    }
    
    public function getEmployees(){
        $employees = $this->xero->load("PayrollAU\\Employee")
        ->where('EmployeeGroupName="Web-Employee"')
        ->execute();
        return $employees;
    }
    
    public function getEmployee($id){
        $employee = $this->xero->loadByGUID("PayrollAU\\Employee",$id);
        return $employee;
    }
    
    
    
    //
    //sync users to wordpress system
    //does not work for too many users or employees
    public function sync_users($mininterval, $employeeonly, $clientsonly){
        $this->usage();
        $this->minimum_sync_interval_in_seconds = $mininterval;
        $msg="Sync users with minimum interval set to $mininterval  \n";
        $this->logConsole($msg);
        
        try{
            if ($clientsonly){
                $this->sync_clients();
            }else if ($employeeonly){
                $this->sync_employees();
            }else{
                $this->sync_clients();
                $this->sync_employees();
            }
        }catch(RateLimitExceededException $e){
            $msg= "Xero API rate limit exceeded, please try again later, existing sync within 600 seconds will by passed automatically\n";
            $this->logConsole($msg);
        }catch(NotFoundException $e){
            $msg= "Xero API resource not found rate limit exceeded, please try again later, existing sync within 600 seconds will by passed automatically\n";
            $this->logConsole($msg);
        }
        
    }
    private  function sync_clients(){
        $contacts = $this->getClients($this->clientgroup);
        foreach ($contacts as $c){
            $msg = sprintf("SYNC Client name=[%s] {%s} \n",  $c->getName(), $c->getContactID());
            $this->logConsole($msg);
            $this->ensure_contact_exists($c);
        }
    }
    
    private function sync_employees(){
        $employees = $this->getEmployees();
        foreach ( $employees as $e){
            $msg = sprintf("SYNC employee name=[%s %s] {%s} \n",  $e->getFirstName(), $e->getLastName(), $e->getEmployeeID());
            $this->logConsole($msg);
//             if ($e->getEmployeeID() != '3e8c2e62-8e28-4b68-ae98-9ef1d76188c4')
//                 continue;
            $this->ensure_staff_exists($e);
        }
    }
    
    private function ensure_contact_exists($contact){
        $login = $contact->getContactID();
        $user = get_user_by('login', $login);
        if ($user === false){
            $xero_contact = $this->getContact($login);
            $args = $this->xero_contact_profile($xero_contact);
            $id = wp_insert_user($args);
            $user = get_user_by('ID', $id);
            update_user_meta($user->ID, 'address', $args['address']);
            update_user_meta($user->ID, 'account', $args['account']);
        }else{//update user
            if ($this->is_too_close_to_sync($user)){
                return;
            }
            $xero_contact = $this->getContact($login);
            $args = $this->xero_contact_profile($xero_contact);
            $args['ID'] = $user->ID;
            unset($args['user_pass']); //we don't change password
            wp_update_user($args);
            update_user_meta($user->ID, 'address', $args['address']);
            update_user_meta($user->ID, 'account', $args['account']);
        }
        $this->mark_updated($user->ID);
    }
    
    private function xero_contact_profile($c){
        $args = [
            'user_login' => $username = $c->getContactID(),
            'user_pass' => md5(uniqid(rand() + time(), true)),
            'display_name' =>$c->getName(),
            'user_email' => $c->getEmailAddress(),
            'first_name' => $c->getFirstName(),
            'last_name' => $c->getLastName(),
            'nickname' => $c->getName(),
            'account' => $c->getAccountNumber(),
            'address'=> $this->get_post_address($c),
            'role' => 'client',
        ];
        return $args;
    }
    
    private function get_post_address($client){
        $result = "";
        $addr = $this->get_client_address_by_type($client, 'POBOX');
        
        if ( $addr != false){
            if ($addr->getAddressLine1() != ""){
                $result .= $addr->getAddressLine1() . ";";
            }
            if ($addr->getAddressLine2() != ""){
                $result .= $addr->getAddressLine2() . ";";
            }
            if ($addr->getAddressLine3() != ""){
                $result .= $addr->getAddressLine3() . ";";
            }
            if ($addr->getAddressLine4() != ""){
                $result .= $addr->getAddressLine4() . ";";
            }
            if ($addr->getCity() != ""){
                $result .= $addr->getCity() . ";";
            }
            if ($addr->getPostalCode() != ""){
                $result .= $addr->getPostalCode() . ";";
            }
        }
        echo "result for client is " . $result . "\n";
        return $result;
    }
    
    private function get_client_address_by_type($client, $t){
        $addr = false;
        foreach( $client->getAddresses() as $a){
            if( $a->getAddressType() == $t){
                $addr = $a;
                break;
            }
        }
        return $addr;
    }
    
    private function ensure_staff_exists($employee)
    {
        $login = $employee->getEmployeeID();
        $user = get_user_by('login', $login);
        if ($user === false){
            echo "add new \n";
            $xero_employee = $this->getEmployee($login);
            $args = $this->xero_employee_profile($xero_employee);
            $id = wp_insert_user($args);
            $user = get_user_by('ID', $id);
            update_user_meta($user->ID, 'mobile', $args['mobile']);
            update_user_meta($user->ID, 'address', $args['address']);
        }else{
            if ($this->is_too_close_to_sync($user)){
                return;
            }
            $xero_employee = $this->getEmployee($login);
            $args = $this->xero_employee_profile($xero_employee);
            $args['ID'] = $user->ID;
            unset($args['user_pass']);
            wp_update_user($args);
            update_user_meta($user->ID, 'mobile', $args['mobile']);
            update_user_meta($user->ID, 'address', $args['address']);
        }
        $this->mark_updated($user->ID);
    }
    
    private function xero_employee_profile($e){
        $args = [
            'user_login' => $username = $e->getEmployeeID(),
            'user_pass' => md5(uniqid(rand() + time(), true)),
            'display_name' =>$e->getFirstName() . " " . $e->getLastName(),
            'user_email' => $e->getEmail(),
            'first_name' => $e->getFirstName(),
            'last_name' => $e->getLastName(),
            'nickname' => $e->getFirstName(),
            'mobile' => $e->getMobile(),
            'address'=> $this->get_employee_address($e),
            'role' => 'staff',
        ];
        return $args;
    }
    
    private function get_employee_address($e){
//         "HomeAddress": {
//         "AddressLine1": "16 Quist Avenue",
//         "City": "Lurnea",
//         "Region": "NSW",
//         "PostalCode": "2170",
//         "Country": "AUSTRALIA"
//         },
        $addr = "";
        $home = $e->getHomeAddress();
        $addr .= $home->getAddressLine1() .",";
        $addr .= $home->getAddressLine2() .",";
        $addr .= $home->getCity() . ",";
        $addr .= $home->getRegion() . " ";
        $addr .= $home->getCountry() ." ";
        $addr .= $home->getPostalCode();
        return $addr;
    }
    
    private function mark_updated($userid){
        update_user_meta($userid, 'lastsync', time());
    }
    
    private function get_last_sync($userid){
        $lastsync = get_user_meta($userid, 'lastsync', true);
        return (int)($lastsync);
    }
    
    private function is_too_close_to_sync($user){
        $userid = $user->ID;
        $lastsync = $this->get_last_sync($user->ID);
        $now = time();
        $diff = $now - (int) $lastsync;
        if ($diff < $this->minimum_sync_interval_in_seconds){
            $msg = sprintf("\tSKIP userid(%d),login=%s,display_name=%s,(lastsync=%d secs ago, mininterval=%d) \n", 
                $user->ID, $user->user_login, $user->display_name, $diff, $this->minimum_sync_interval_in_seconds);
            $this->logConsole($msg);
            return true;
        }
        return false;
    }
    
    private function logConsole($str){
        //if is commandline
        if ( defined( 'WP_CLI' ) && WP_CLI ) {
            echo $str;
        }
    }  
    
    private function usage(){
        $msg = "_____________________________________________\n";
        $msg .= "run this command at public_html/, where wp-config.php exist \n"; 
        $msg .= "wp sync_users --mininterval=6000 \n";
        $msg .= "6000 means those users synced within 6000 seconds will be bypassed \n";
        $msg .= "to sync everything \n";
        $msg .= "wp sync_users --mininterval=0 [--clientsonly] [--employeeonly]\n";
        $msg .= "but it may hit XERO rate limit, 60call/sec, 5000/day \n";
        $msg .= "---------------------------------------------\n";
        $this->logConsole($msg);
    }
    
    /* sync payitems to wp options */
    public function init_wp(){
        $this->sync_payitem();
    }
    
    private function sync_payitem(){
        if ($this->too_close_to_sync_payitem()){
            return;
        }
        $payitems = $this->xero->load('PayrollAU\\PayItem')->execute();
        $payitem_options = array();
        foreach ($payitems[0]->getEarningsRates() as $e){
//             "EarningsRateID": "34e17d08-237a-4ae2-8115-375d1ff8a9ed",
//             "Name": "Overtime Hours (exempt from super)",
//             "EarningsType": "OVERTIMEEARNINGS",
//             "RateType": "MULTIPLE",
//             "AccountCode": "477",
//             "Multiplier": 1.5,
//             "IsExemptFromTax": true,
//             "IsExemptFromSuper": true,
//             "AccrueLeave": false,
//             "IsReportableAsW1": true,
//             "UpdatedDateUTC": "2019-03-16T13:18:19+00:00",
//             "CurrentRecord": false
            if ($e->getCurrentRecord() == "true"){
                $payitem_options[]= array(
                    'EarningsRateID' => $e->getEarningsRateID(),
                    'Name'=> $e->getName(),
                    'EarningsType'=> $e->getEarningstype(),
                    'RatePerUnit' => $e->getRatePerUnit(),
                    'RateType' => $e->getRateType(),
                    'AccountCode' => $e->getAccountCode(),
                    "Multiplier"=> $e->getMultiplier(),
                    "IsExemptFromTax" => $e->getIsExemptFromTax(),
                    "IsExemptFromSuper"=> $e->getIsExemptFromSuper(),
                    "AccrueLeave" => $e->getAccrueLeave(),
                );
            }
        }
        update_option('bts_payitem_earnings_rate', $payitem_options);
        update_option('bts_payitem_last_sync', time());
    }
    
    private function too_close_to_sync_payitem(){
        $lastsync = get_option('bts_payitem_last_sync', 0);
        $now = time();
        $diff = $now - (int) $lastsync;
        return $diff < $this->minimum_sync_interval_in_seconds; //default 10 minutes
    }
    
}