////
//// Copyright (c) Ricoh Corporation. All rights reserved
////
//// File Name:
////
////     rcUsbBidi.js
////
//// Abstract:
////
////    Ricoh USBMON Javascript extension file for v4 printer class drivers.
////

//// Get the requested Schema(s)
////
//// @param  scriptContext - Script context object which allows access to IPrinterScriptablePropertyBag for printer driver and queue properties
//// @param  printerStream - Allows the script to Write/Read data from the attached USB device
//// @param  schemaRequests - Contains all the requested Query Keys.
//// @param  printerBidiSchemaResponses - Object the script will use to store all responses to query keys
////
//// @return Integer value - currently only JavaScript exceptions are expected for failures
////
//// The script can use the schemaRequests object to iterate through the Query Keys requested by the user. Based on the query keys
//// the script should use the printerStream object to communicate with the USB print device and determine the values of one or more Bidi 
//// Schema elements. For each Bidi Schema element the new value can be returned to the caller by using functions of the printerBidiSchemaResponses
//// object.
////
//// The scriptContext object provides access to the Driver and Queue prorperty bags associated with the current device. These property bags support read-only access.
//// 


/*jslint unparam: true, sloppy: true, vars: true, white: true, plusplus: true, maxerr: 50, indent: 4 */

function getSchemas(scriptContext, printerStream, schemaRequests, printerBidiSchemaResponses) {

    var retVal   =   0;
    var index    =   0;

    for (index = 0; index < schemaRequests.length; index++) {
        var key = schemaRequests[index];

        if (key === "Configuration") {

            var queryDuplexStr    =   "@PJL INQUIRE DUPLEX\r\n";
            var queryColorStr     =   "@PJL INQUIRE DATAMODE\r\n";
            var queryStapleStr    =   "@PJL INQUIRE STAPLE\r\n";
            var queryPunchStr     =   "@PJL INQUIRE PUNCH\r\n";
            var unknownStr        =   "\"?\"\r\n";
            var i                 =   0;

            ////Build "<Esc>%-12345X@PJL\r\n@PJL INQUIRE DUPLEX\r\n@PJL INQUIRE DATAMODE\r\n@PJL INQUIRE STAPLE\r\n@PJL INQUIRE PUNCH\r\n<Esc>%-12345X";
            ////header: <Esc>%-12345X@PJL\r\n
            var writeData     =       [0x1B, 0x25, 0x2D, 0x31, 0x32, 0x33, 0x34, 0x35, 0x58, 0x40, 0x50, 0x4A, 0x4C, 0x0D, 0x0A];
            var queryStr      =       queryDuplexStr + queryColorStr + queryStapleStr + queryPunchStr;
            for (i = 0; i < queryStr.length; i++) {
                writeData.push(queryStr.charCodeAt(i));
            }
            ////tail: <Esc>%-12345X
            writeData         =       writeData.concat(0x1B, 0x25, 0x2D, 0x31, 0x32, 0x33, 0x34, 0x35, 0x58);

            ////Write data to Device
            var bytesWritten  =       printerStream.write(writeData);
            var duplexInstalled       =   true;
            var colorSupported        =   true;
            var punchSupported        =   true;
            var stapleSupported       =   true;          

         if (bytesWritten === writeData.length) {             
            
            ////Read from Device
             var readBuffer     =   printerStream.read(1024);
             var bytesRead      =   readBuffer.length;
             var readString     =   "";

             for (i = 0; (bytesRead > 0) && (i < bytesRead); i++) {
                     readString += String.fromCharCode(readBuffer.shift());
                 }                 

            ////Detect supported features
             if (readString.length > 0) {                 
                     if (readString.indexOf(queryDuplexStr + unknownStr, 0) >= 0) {
                         duplexInstalled = false;
                         }

                     if (readString.indexOf(queryColorStr + unknownStr, 0) >= 0) {
                         colorSupported = false;
                         }

                     if (readString.indexOf(queryPunchStr + unknownStr, 0) >= 0) {
                         punchSupported = false;
                         }

                     if (readString.indexOf(queryStapleStr + unknownStr, 0) >= 0) {
                         stapleSupported = false;
                         }
             }
         }

         printerBidiSchemaResponses.addBool("\\Printer.Configuration.DuplexSupport:Installed",  duplexInstalled);         
         printerBidiSchemaResponses.addBool("\\Printer.Configuration.ColorSupport:Installed",   colorSupported);
         printerBidiSchemaResponses.addBool("\\Printer.Finishing.PunchingSupport:Installed",    punchSupported);
         printerBidiSchemaResponses.addBool("\\Printer.Finishing.StaplingSupport:Installed",    stapleSupported);

      }  
   }
   return retVal;
}