//
// Copyright (c) Eastman Kodak Company. All rights reserved.
//
// Purpose:
//
//    USB Bidi JavaScript Extension File for Kodak AiO OPL Devices.
//


function sendCommand(strQuery, printerStream) {

    var strRead = "";

    var bufWrite = [];

    var i = 0;
    for (i = 0; i < strQuery.length; i++) {
        bufWrite.push(strQuery.charCodeAt(i));
    }
    bufWrite = bufWrite.concat(0x3F);   // add ?

    var nBytesWritten = printerStream.write(bufWrite);

    if (nBytesWritten === bufWrite.length) {

        var bufRead = printerStream.read(4097);
        var nBytesRead = bufRead.length;

        for (i = 0; (nBytesRead > 0) && (i < nBytesRead); i++) {
            strRead += String.fromCharCode(bufRead.shift());
        }
    }

    return strRead;
}

function setSchemaResponse(strRead, printerBidiSchemaResponses) {

    if (strRead.length > 0) {

        var strResponseDuplexInstalled = "DeviceSettings.System.Configuration.DuplexerInstalled=YES";
        var strResponseDuplexNotInstalled = "DeviceSettings.System.Configuration.DuplexerInstalled=NO";
        var strResponseInputTray1PositionControlInstalled = "DeviceCapabilities.MechConfig.InputTray1PositionControl=Auto";
        var strResponseInputTray2PositionControlInstalled = "DeviceCapabilities.MechConfig.InputTray2PositionControl=Auto";
        var strResponseInputTray3PositionControlInstalled = "DeviceCapabilities.MechConfig.InputTray3PositionControl=Auto";
        var strResponseInputTray1PlainPaperCapacityInstalled = "DeviceCapabilities.MechConfig.InputTray1PlainPaperCapacity=40";
        var strResponseInputTray2PlainPaperCapacityInstalled = "DeviceCapabilities.MechConfig.InputTray2PlainPaperCapacity=40";
        var strResponseInputTray3PlainPaperCapacityInstalled = "DeviceCapabilities.MechConfig.InputTray3PlainPaperCapacity=40";

        if (strRead.indexOf(strResponseDuplexInstalled, 0) >= 0) {
            printerBidiSchemaResponses.addBool("\\Printer.Configuration.DuplexUnit:Installed", true);
        } else if (strRead.indexOf(strResponseDuplexNotInstalled, 0) >= 0) {
            printerBidiSchemaResponses.addBool("\\Printer.Configuration.DuplexUnit:Installed", false);
        }

        var bPhotoTrayInstalled = false;
        if (strRead.indexOf(strResponseInputTray2PositionControlInstalled, 0) >= 0) {

            bPhotoTrayInstalled = true;
            printerBidiSchemaResponses.addBool("\\Printer.Configuration.PhotoTray:Installed", true);
        } else if (strRead.indexOf(strResponseInputTray3PositionControlInstalled, 0) >= 0) {

            bPhotoTrayInstalled = true;
            printerBidiSchemaResponses.addBool("\\Printer.Configuration.PhotoTray:Installed", true);
        } else if (strRead.indexOf(strResponseInputTray1PositionControlInstalled, 0) >= 0) {

            bPhotoTrayInstalled = true;
            printerBidiSchemaResponses.addBool("\\Printer.Configuration.PhotoTray:Installed", true);
        }

        if (bPhotoTrayInstalled === false) {

            if (strRead.indexOf(strResponseInputTray2PlainPaperCapacityInstalled, 0) >= 0) {

                bPhotoTrayInstalled = true;
                printerBidiSchemaResponses.addBool("\\Printer.Configuration.PhotoTray:Installed", true);
            } else if (strRead.indexOf(strResponseInputTray3PlainPaperCapacityInstalled, 0) >= 0) {

                bPhotoTrayInstalled = true;
                printerBidiSchemaResponses.addBool("\\Printer.Configuration.PhotoTray:Installed", true);
            } else if (strRead.indexOf(strResponseInputTray1PlainPaperCapacityInstalled, 0) >= 0) {

                bPhotoTrayInstalled = true;
                printerBidiSchemaResponses.addBool("\\Printer.Configuration.PhotoTray:Installed", true);
            }
        }

        if (bPhotoTrayInstalled === false) {
            printerBidiSchemaResponses.addBool("\\Printer.Configuration.PhotoTray:Installed", false);
        }
    }
}


/// Get the requested Schema(s)
///
/// @param  driverProperties - Placeholder: IPrinterScriptablePropertyBag for printer driver 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
///
/// 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. Once all query keys have been processed and all values added to the printerBidiSchemaResponses object the script can return
///
function getSchemas(driverProperties, printerStream, schemaRequests, printerBidiSchemaResponses) {

    var nReturnValue = 0;

    if (printerStream === null ||
	        schemaRequests === null ||
	        printerBidiSchemaResponses === null) {
        return nReturnValue;
    }

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

        var strKey = schemaRequests[index];

        if (strKey === "Configuration") {

            var strQueryDuplex = "DeviceSettings.System.Configuration.DuplexerInstalled";
            var strQueryMechConfig = "DeviceCapabilities.MechConfig";

            var strRead = sendCommand(strQueryDuplex, printerStream);
            setSchemaResponse(strRead, printerBidiSchemaResponses);
            strRead = "";
            strRead = sendCommand(strQueryMechConfig, printerStream);
            setSchemaResponse(strRead, printerBidiSchemaResponses);
        }
    }

    return nReturnValue;
}

///
/// Set a requested Bidi Schema Value in the device
///
/// @param driverProperties - Placeholder: IPrinterScriptablePropertyBag for printer driver properties
/// @param printerStream - Allows the script to Write/Read data from the attached USB device
/// @param printerBidiSchemaElement - Contains all the data associated with the Bidi Schema Value to set
///
/// The script can interpret the incoming Bidi Schema value to either set data in the device or perform an action on the device.
///
function setSchema(driverProperties, printerStream, printerBidiSchemaElement) {
    var nReturnValue = 0;

    return nReturnValue;
}

///
/// Retrieve unsolicited Bidi Schema value updates from the USB device during printing
///
/// @param printerStream - Allows the script to Write/Read data from the attached USB device
/// @param printerBidiSchemaResponses - Object the script will use to store all responses to query keys
///
/// This function is only called when a job is printing.
///
function getStatus(driverProperties, printerStream, printerBidiSchemaResponses) {
    var nReturnValue = 0;

    return nReturnValue;
}