<?php
class Op_Themial_Printer{
    
    
    public $_filesystem;
    public function __construct()
    {
       
        if(!class_exists('WP_Filesystem_Direct'))
        {
            require_once(ABSPATH . 'wp-admin/includes/class-wp-filesystem-base.php');
            require_once(ABSPATH . 'wp-admin/includes/class-wp-filesystem-direct.php');
        }
        $this->_filesystem = new WP_Filesystem_Direct(false);
        add_action( 'init',  array($this,'registerScripts'));
    }
   

    public function init(){
         add_filter('op_addon_setting',array($this,'op_addon_setting'),10,1);
       
         add_filter('op_get_login_cashdrawer_data',array($this,'op_get_login_cashdrawer_data'),10,1);
         add_filter('openpos_pos_footer_js',array($this,'pos_footer'),20,1);
         //add_action( 'op_pos_page_after', array($this,'custom_op_prnt_op_pos_page_after') );

         add_action( 'wp_ajax_nopriv_op_print_get_receipt', array($this,'get_receipt') );
         add_action( 'wp_ajax_op_print_get_receipt', array($this,'get_receipt') );

        //  add_action( 'op_pos_page_after', function(){
        //     echo '<div id="op-print-preview" style="display: block;
        //     position: absolute;
        //     top: -1000000px;
        //     height: fit-content;
        //     width: fit-content;"></div>';
        //  });


    }

    public function registerScripts(){
        global $OPENPOS_SETTING;
        global $op_in_pos_screen;
        if($op_in_pos_screen)
        {
            $printinterface =  $OPENPOS_SETTING->get_option('op_themal_printer_interface','openpos_addon');
            if(!$printinterface)
            {
                $printinterface = 'usb';
            }
            //wp_enqueue_script('openpos.op_printer.html2canvas', 'https://html2canvas.hertzen.com/dist/html2canvas.min.js',array('jquery'));
            //wp_enqueue_script('openpos.op_printer.js',  OPENPOS_T_OP_PRINTER_URL.'/assets/js/printer.js',array('jquery','openpos.op_printer.html2canvas'),time());
            wp_enqueue_script('openpos.op_printer.js',  OPENPOS_T_OP_PRINTER_URL.'/assets/js/printer.js',array('jquery'),time());
            wp_add_inline_script('openpos.op_printer.js',"
                        var op_printer_server_url = '".admin_url('admin-ajax.php')."';
                        var print_type = '".$printinterface."';
            ",'before');
            
        }
    }

    function op_addon_setting($addition_general_setting){
        global $OPENPOS_SETTING;
        $addition_general_setting[] =     array(
            'name'    => 'op_themal_printer_interface',
            'label'   => __( 'Thermal Printer Interface', 'openpos' ),
            'desc'    => 'Thermal Printer Interface. It depend your printer connection',
            'type'    => 'select',
            'default' => 'usb',
            'options' => array(
                'usb' => __( 'USB', 'openpos' ),
                'ble' => __( 'Bluethooth', 'openpos' ),
            )
        );
        return $addition_general_setting;
    }

    function op_get_login_cashdrawer_data($session_response_data){
    
        $session_response_data['setting']['pos_event_print'] = 'yes';
       // $session_response_data['setting']['trigger_cashdrawer'] = 'yes';
        $session_response_data['setting']['pos_kitchent_event_print'] = 'yes';
        return $session_response_data;
    
    }
    
    function pos_footer($handles){
        $handles[] = 'openpos.op_printer.js';
        return $handles;
    }
    
    function custom_op_prnt_op_pos_page_after(){
        ?>
        
        
        <iframe id="vid-oprinter" src="<?php echo OPENPOS_T_OP_PRINTER_URL; ?>/printer/index.php" style="display:none;"></iframe>

        <?php
    }

    //register form
    function op_register_form_end($default,$warehouses,$cashiers){
        
    }

    function op_register_save_after($id,$params,$op_register){
        
    }

    function byteStr2byteArray($s) {
        return array_slice(unpack("C*", "\0".$s), 1);
    }

    function get_receipt(){
        $result = array(
            'status' => 0,
            'message' => 'Unknown',
            'data' => ''
        );
        $session = isset($_REQUEST['session']) ? $_REQUEST['session'] : '';
        $source = isset($_REQUEST['source']) ? $_REQUEST['source'] : '';
        $source_type = isset($_REQUEST['source_type']) ? $_REQUEST['source_type'] : '';
        $print_type = isset($_REQUEST['print_type']) ? $_REQUEST['print_type'] : 'usb';
        
        $order = isset($_REQUEST['print_data']) ? json_decode(stripslashes($_REQUEST['print_data']),true): array();
       
        
        
        $print_details =  array(
            'max_char' => 32,
            'print_id' => 1,
        );

        $max_char = isset($print_details['max_char']) ? $print_details['max_char'] : 0;

        if($print_type == 'ble')
        {
            $receipt_data = array();
            $print_content = array();
            if($source_type != 'kitchen')
            {
                $receipt_data = $this->generatePrintContent($max_char,$order,$source_type,$source,true);
            }else{
                $receipt_data = $this->generateKitchenPrintContent($max_char,$order,$source_type,$source,true);
            }
            foreach($receipt_data as $c)
            {
                $print_content[] = $this->byteStr2byteArray($c);
            }
            
        }else{
            if($source_type != 'kitchen')
            {
                $print_content = $this->generatePrintContent($max_char,$order,$source_type,$source);
            }else{
                $print_content = $this->generateKitchenPrintContent($max_char,$order,$source_type,$source);
            }
        }
        

        

        $result['status'] = 1;
        $result['data'] = $print_content;

        
        echo json_encode($result);exit;
    }

    function custom_op_printnode_print(){
        global $op_woo;
        global $OPENPOS_SETTING;
        global $op_session;
        global $op_bizzswoop_printer;
        $session = isset($_REQUEST['session']) ? $_REQUEST['session'] : '';
        $source = isset($_REQUEST['source']) ? $_REQUEST['source'] : '';
        $source_type = isset($_REQUEST['source_type']) ? $_REQUEST['source_type'] : '';
        
        $order_html = stripslashes($_REQUEST['html']);
        $order = json_decode(stripslashes($_REQUEST['order']),true);
        
        $print_id = 0;
        $session_data = $op_session->data($session);

        $locations =  $op_woo->getListRestaurantArea();
        $openpos_type = $OPENPOS_SETTING->get_option('openpos_type','openpos_pos');
        if($openpos_type != 'restaurant')
        {
            $locations = array();
        }
        
        if( !empty($session_data))
        {
            $register_id = isset($session_data['login_cashdrawer_id']) ? $session_data['login_cashdrawer_id'] : 0;
            if($register_id)
            {
                $is_takeaway = isset($order['is_takeaway']) ? 1*$order['is_takeaway'] : 0;
               
                $register_locations = get_post_meta($register_id,'_op_register_printnode',true);

                $kitchen_items = array();
                $order_items = isset($order['items']) ? $order['items'] : array();

                foreach($locations as $code => $location)
                {
                    $print_id = isset($register_locations[$code]) ? $register_locations[$code] : 0;
                    if($print_id)
                    {
                        foreach($order_items as $item)
                        {
                            if(isset($item['product_id']) && $item['product_id'])
                            {
                                $a_key = '_op_'.$code;
                                $product_id = $item['product_id'];
                                $parent_id = wp_get_post_parent_id($product_id);
                                if($parent_id)
                                {
                                    $_op_value = get_post_meta($parent_id,$a_key,true);
                                }else{
                                    $_op_value = get_post_meta($item['product_id'],$a_key,true);
                                }
                                
                                $default_value = 'no';
                                if($_op_value )
                                {
                                    if( $_op_value == 'no')
                                    {
                                        $default_value = 'no';
                                    }
                                    if( $_op_value == 'yes')
                                    {
                                        $default_value = 'yes';
                                    }
                                }
                                if($default_value == 'yes')
                                {
                                    if(!isset($kitchen_items[$code]))
                                    {
                                        $kitchen_items[$code] = array(
                                            'print_id' => $print_id,
                                            'items' => array() 
                                        );
                                    }
                                    $kitchen_items[$code]['items'][] = $item;
                                }
                            }
                        }
                    }
                }
                
                
                if($source_type != 'kitchen')
                {
                    $print_id = isset($register_locations['_default']) ? $register_locations['_default'] : 0;
                    if($print_id)
                    {
                        $print_details = $this->getPrinterDetails($print_id);
                        $max_char = isset($print_details['max_char']) ? $print_details['max_char'] : 0;
                        $print_content = $this->generateBase64Content($max_char,$order,$source_type,$source);
                        $job_id = $this->print( $print_id, $print_content );
                    }
                    
                    if(!$is_takeaway)
                    {
                        
                        $kitchen_items = array();
                    }
                }

                

                foreach($kitchen_items as $kitchen)
                {
                    $print_id = isset($kitchen['print_id']) ? $kitchen['print_id'] : 0;
                    if($print_id)
                    {
                        $print_details = $this->getPrinterDetails($print_id);
                        $max_char = isset($print_details['max_char']) ? $print_details['max_char'] : 0;
                        $tmp = $order;
                        $tmp['items'] = $kitchen['items'];
                        if(!isset($tmp['order_number_format']))
                        {
                            $tmp['order_number_format'] = isset($tmp['label']) ? $tmp['label'] : '';
                        }
                        if(!$tmp['order_number_format'])
                        {
                            $tmp['order_number_format'] = isset($tmp['desk']) ? $tmp['desk']['name'].'-'.$tmp['desk']['type'] : 'Unknown';
                        }
                        $print_content = $this->generateBase64KitchenContent($max_char,$tmp,$source_type,$source);
                       
                        $job_id = $this->print( $print_id, $print_content );
                    }
                }
                
            }
            
        }
        exit;
    }
    public function getPrinterDetails($printer_id){
        $result = array(
            'max_char' => 32,
            'print_id' => $printer_id,
        );
        return apply_filters('op_printnode_print',$result);
    }

   
    public function generateKitchenPrintContent($max_char,$order,$source_type,$source,$return_array = false){
        $ESC = "\e";
        $GS = chr(29);
        $InitializePrinter = "@";
        $nl="\n"; //Single new line
        $dnl=$nl.$nl; //Double new line
        $BoldOn = $ESC . "E" . "1";
        $BoldOff = $ESC . "E" . "0";
        $DoubleOn = $GS . "!" . "16";  // 2x sized text (double-high + double-wide)
        $DoubleOff = $GS . "!" . "0";
        $jLeft = $ESC."a"."0";//allign Left
        $jCenter=$ESC."a"."1";//allign Center
        $jRight=$ESC."a"."2";//allign Right
        
        $order_number = isset($order['label']) ? $order['label'] :  $order['order_number_format'];

        $cmd = $ESC.$InitializePrinter.$jCenter.$BoldOn.$order_number.$BoldOff.$nl;
        $cmd.= $dnl;
        foreach($order['items'] as $item)
        {
            $qty = $item['qty'];
            $name = $item['name'];
            
            $columns = array();
            $columns[] = $qty." x ";
            $columns[] = $name;
            $line_text = '';
            if($max_char)
            {
                $line_text = $this->get_column_separated_data($columns,$max_char);
            }

            if(!$line_text)
            {
                $line_text =  implode(' ',$columns);
            }
            
            $cmd.=  $line_text;
            $cmd.= $nl;
            if(isset($item['sub_name']) && $item['sub_name'])
            {
                $substr = str_replace('</span>','</span>, ',$item['sub_name']);
                $substr = strip_tags($substr);
                $substr = trim($substr);
                $substr = trim($substr,',');
                if(strlen($substr) > 0)
                {
                    $cmd.=  $substr;
                    $cmd.= $nl;
                }
                
            }
        }
        $cmd.= $nl;
        $cmd.=$jCenter."*******".__('Thank you','openpos-woocommerce-printnode')."*******".$nl;
        $cmd.= $dnl;
        $cmd.=$ESC;
        return apply_filters('op_thermal_printer_kitchen_receipt_content',$cmd,$order);
        
    }
    public function generatePrintContent($max_char,$order,$source_type,$source,$return_array = false){
        
        $ESC = "\e";
        $GS = chr(29);
        $InitializePrinter = "@";
        $nl="\n"; //Single new line
        
        
        $dnl=$nl.$nl; //Double new line
        $BoldOn = $ESC . "E" . "1";
        $BoldOff = $ESC . "E" . "0";
        $DoubleOn = $GS . "!" . "16";  // 2x sized text (double-high + double-wide)
        $DoubleOff = $GS . "!" . "0";
        $jLeft = $ESC."a"."0";//allign Left
        $jCenter=$ESC."a"."1";//allign Center
        $jRight=$ESC."a"."2";//allign Right
        $cutPaper =  $ESC . "V" . "1";

        $receipt_array_data = array();
        
        if($source_type != 'kitchen')
        {
            $order_number = $order['order_number_format'];
            $receipt_array_data[]  = $ESC.$InitializePrinter.$jCenter.$BoldOn.$order_number.$BoldOff.$nl;
            $receipt_array_data[] = $dnl;

           

            $customer = isset($order['customer'])  ? $order['customer'] : array();
            $register = isset($order['register'])  ? $order['register'] : array();
            
            $customer_name = '';
            $staff_name = isset($order['sale_person_name']) ? $order['sale_person_name'] : '';
            if(!$staff_name)
            {
                $staff_name = __('Staff','openpos-woocommerce-printnode');
            }
            
            $register_name = isset($register['name']) ? $register['name'] : '';
            if(isset($customer['name']) && $customer['name'])
            {
                $customer_name = $customer['name'];
            }
            if(!$customer_name && isset($customer['email']) && $customer['email'])
            {
                $customer_name = $customer['email'];
            }
            if(!$customer_name && isset($customer['phone']) && $customer['phone'])
            {
                $customer_name = $customer['phone'];
            }
            if(!$customer_name)
            {
                $customer_name = __('Guest','openpos-woocommerce-printnode');
            }

            $receipt_array_data[] = sprintf(__('Customer: %s','openpos-woocommerce-printnode'),$customer_name).$nl;
            $receipt_array_data[] = sprintf(__('Staff: %s','openpos-woocommerce-printnode'),$staff_name).$nl;


            if($register_name)
            {
                $receipt_array_data[] = sprintf(__('Register: %s','openpos-woocommerce-printnode'),$register_name).$nl;
            }
            
           
            $receipt_array_data[] = $nl;
            foreach($order['items'] as $item)
            {
                $qty = $item['qty'];
                $name = $item['name'];
                $total_incl_tax_currency_formatted = $item['total_incl_tax_currency_formatted'];
                $columns = array();
                $columns[] = $qty." x ".$name;
                $columns[] = $total_incl_tax_currency_formatted;
                $line_text = '';
                if($max_char)
                {
                    $line_text = $this->get_column_separated_data($columns,$max_char);
                }

                if(!$line_text)
                {
                    $line_text =  implode(' ',$columns);
                }
                
                $receipt_array_data[] =  $line_text.$nl;
                

                if(isset($item['sub_name']) && $item['sub_name'])
                {
                    $substr = str_replace('</span>','</span>, ',$item['sub_name']);
                    $substr = strip_tags($substr);
                    $substr = trim($substr);
                    $substr = trim($substr,',');
                    if(strlen($substr) > 0)
                    {
                        $receipt_array_data[] =  $substr. $nl;
                    }
                }
            }
            $receipt_array_data[] = $nl;
            
            $subtotal = $order['sub_total_currency_formatted'];
            $discount = $order['discount_final_amount_currency_formatted'];
            $total_shipping = $order['shipping_cost_currency_formatted'];
            $total_tax = $order['tax_amount_currency_formatted'];
            $grand_total = $order['grand_total_currency_formatted'];
            $receipt_array_data[] =$jLeft.__('SubTotal','openpos-woocommerce-printnode').":".$jRight." ".$subtotal.$nl;

            $receipt_array_data[] =$jLeft.__('Discount','openpos-woocommerce-printnode').":".$jRight." ".$discount.$nl;
            if($order['shipping_cost'] > 0)
            {
                $receipt_array_data[] =$jLeft.__('Shipping','openpos-woocommerce-printnode').":".$jRight." ".$total_shipping.$nl;
            }
            
            $receipt_array_data[] =$jLeft.__('TAX','openpos-woocommerce-printnode').":".$jRight." ".$total_tax.$nl;
            $receipt_array_data[] =$jLeft.__('Grand Total','openpos-woocommerce-printnode').":".$jRight." ".$grand_total.$nl;

            $receipt_array_data[] =$jCenter."-----".__('Payment','openpos-woocommerce-printnode')."-----".$nl;
            foreach($order['payment_method'] as $method)
            {
                $receipt_array_data[] =$jLeft.$method['name'].":".$jRight." ".$method['paid_currency_formatted'].$nl;
                if($method['code'] == 'cash' && $method['return'] > 0)
                {
                    $cmd.=$jLeft.__('Return','openpos-woocommerce-printnode').":".$jRight." ".$method['return_currency_formatted'].$nl;
                }
            }
            $receipt_array_data[] = $nl;
            $receipt_array_data[] =$jCenter."*******".__('Thank you','openpos-woocommerce-printnode')."*******".$nl;
            $receipt_array_data[] = $dnl;
            $receipt_array_data[] =$ESC;
        }else{
            $cmd=$ESC.$InitializePrinter."#112".$nl;
            $cmd.=$BoldOn."My Bold text".$BoldOff." no more bold".$nl;
            $cmd.="Regular allign".$nl;
            $cmd.=$jLeft."Left allign".$nl;
            $cmd.=$jCenter."Center allign".$nl;
            $cmd.=$jRight."Right allign".$nl;
            $cmd.=$jLeft."VAT:".$jRight."45 $".$nl;
            $cmd.=$ESC;
        }
        $receipt_array_data[] = $cutPaper;
        if($return_array)
        {
            return apply_filters('op_thermal_printer_receipt_content',$receipt_array_data,$order,$return_array);
        }else{
            return apply_filters('op_thermal_printer_receipt_content',implode('',$receipt_array_data),$order,$return_array);
        }
        
    }
    function get_column_separated_data($columns, $max_chars)
	{
		$total_columns = count($columns);
		if ($total_columns == 0) return "";
		if ($total_columns == 1) return $columns[0];
		if ($total_columns == 2)
		{
			$total_characters = strlen($columns[0])+strlen($columns[1]);
            $total_whitespace = $max_chars - $total_characters;
			if ($total_whitespace < 0) return "";
			return $columns[0].str_repeat(" ", $total_whitespace).$columns[1];
		}
		$total_characters = 0;
		foreach ($columns as $column)
		{
			$total_characters += strlen($column);
		}
        $total_whitespace = $max_chars - $total_characters;
        
		if ($total_whitespace < 0) return "";
		$total_spaces = $total_columns-1;
		$space_width = floor($total_whitespace / $total_spaces);
		$result = $columns[0].str_repeat(" ", $space_width);
		for ($i = 1; $i < ($total_columns-1); $i++)
		{
			$result .= $columns[$i].str_repeat(" ", $space_width);
		}
		$result .= $columns[$total_columns-1];
		
		return $result;
	}
}