/// <reference path="v4PrintDriver-Intellisense.js" />

function getSchemas(
    scriptContext,
    printerStream,
    schemaRequests,
    printerBidiSchemaResponses) {
    try {
        scriptContext.Log(
            "getSchemas called. Count=" +
            schemaRequests.length
        );

        for (var i = 0; i < schemaRequests.length; i++) {
            var schema = schemaRequests[i];

            scriptContext.Log(
                "QueryKey=" +
                schema.QueryKey
            );

            switch (schema.QueryKey) {
                case "USB_FirmwareVersion":

                    printerBidiSchemaResponses.AddStringValue(
                        "\\Printer.DeviceInfo.FirmwareVersion",
                        "1.0.0"
                    );

                    scriptContext.Log(
                        "Returned FirmwareVersion=1.0.0"
                    );

                    break;

                case "USB_DeviceState":
                case "USB_StateReason":

                    try {
                        var cmd =
                            "@PJL INFO STATUS\r\n";

                        scriptContext.Log(
                            "Sending PJL status request"
                        );

                        printerStream.Write(
                            cmd,
                            cmd.length
                        );

                        var buffer =
                            new Uint8Array(512);

                        var bytesRead =
                            printerStream.Read(
                                buffer,
                                buffer.length
                            );

                        scriptContext.Log(
                            "BytesRead=" +
                            bytesRead
                        );

                        var deviceState =
                            "Unknown";

                        var stateReason =
                            "None";

                        if (bytesRead > 0) {
                            var response = "";

                            for (var j = 0;
                                j < bytesRead;
                                j++) {
                                response +=
                                    String.fromCharCode(
                                        buffer[j]
                                    );
                            }

                            scriptContext.Log(
                                "PJL Response=" +
                                response
                            );

                            var upper =
                                response.toUpperCase();

                            if (
                                upper.indexOf("READY") >= 0
                            ) {
                                deviceState =
                                    "Ready";
                            }
                            else if (
                                upper.indexOf("PRINT") >= 0
                            ) {
                                deviceState =
                                    "Printing";
                            }
                            else if (
                                upper.indexOf("PAPER") >= 0
                            ) {
                                deviceState =
                                    "Error";

                                stateReason =
                                    "Out Of Paper";
                            }
                            else if (
                                upper.indexOf("JAM") >= 0
                            ) {
                                deviceState =
                                    "Error";

                                stateReason =
                                    "Paper Jam";
                            }
                            else if (
                                upper.indexOf("ERROR") >= 0
                            ) {
                                deviceState =
                                    "Error";

                                stateReason =
                                    "Printer Error";
                            }
                        }
                        else {
                            stateReason =
                                "No Response";
                        }

                        printerBidiSchemaResponses
                            .AddStringValue(
                                "\\Printer.Status.DeviceState",
                                deviceState
                            );

                        printerBidiSchemaResponses
                            .AddStringValue(
                                "\\Printer.Status.StateReason",
                                stateReason
                            );

                        scriptContext.Log(
                            "DeviceState=" +
                            deviceState +
                            ", StateReason=" +
                            stateReason
                        );
                    }
                    catch (innerEx) {
                        scriptContext.LogError(
                            "Status query failed: " +
                            innerEx.message
                        );
                    }

                    break;
            }
        }

        return 0;
    }
    catch (e) {
        scriptContext.LogError(
            "getSchemas failed: " +
            e.message
        );

        return 1;
    }
}


function setSchema(
    scriptContext,
    printerStream,
    printerBidiSchemaElement) {
    try {
        scriptContext.Log(
            "setSchema called"
        );

        return 0;
    }
    catch (e) {
        scriptContext.LogError(
            "setSchema failed: " +
            e.message
        );

        return 1;
    }
}


function getStatus(
    scriptContext,
    printerStream,
    printerBidiSchemaResponses) {
    try {
        scriptContext.Log(
            "getStatus called"
        );

        var buffer =
            new Uint8Array(256);

        var bytesRead =
            printerStream.Read(
                buffer,
                buffer.length
            );

        if (bytesRead <= 0) {
            return 0;
        }

        scriptContext.Log(
            "Status bytes received=" +
            bytesRead
        );

        var deviceState =
            "Unknown";

        var stateReason =
            "None";

        switch (buffer[0]) {
            case 0x18:

                deviceState =
                    "Ready";

                break;

            case 0x01:

                deviceState =
                    "Printing";

                break;

            case 0x02:

                deviceState =
                    "Error";

                stateReason =
                    "Paper Jam";

                break;

            case 0x03:

                deviceState =
                    "Error";

                stateReason =
                    "Out Of Paper";

                break;

            default:

                stateReason =
                    "Unknown Status";

                break;
        }

        printerBidiSchemaResponses
            .AddStringValue(
                "\\Printer.Status.DeviceState",
                deviceState
            );

        printerBidiSchemaResponses
            .AddStringValue(
                "\\Printer.Status.StateReason",
                stateReason
            );

        scriptContext.Log(
            "Status update: " +
            deviceState +
            ", " +
            stateReason
        );

        return 0;
    }
    catch (e) {
        scriptContext.LogError(
            "getStatus failed: " +
            e.message
        );

        return 0;
    }
}


function requestStatus(
    scriptContext,
    printerStream,
    printerBidiSchemaResponses) {
    try {
        scriptContext.Log(
            "requestStatus called"
        );

        return 2;
    }
    catch (e) {
        scriptContext.LogError(
            "requestStatus failed: " +
            e.message
        );

        return 2;
    }
}


var PrinterBidiSchemaElementType =
{
    PrinterBidiSchemaElementType_Null: 0,
    PrinterBidiSchemaElementType_Int: 1,
    PrinterBidiSchemaElementType_Float: 2,
    PrinterBidiSchemaElementType_Bool: 3,
    PrinterBidiSchemaElementType_String: 4,
    PrinterBidiSchemaElementType_Text: 5,
    PrinterBidiSchemaElementType_Enum: 6,
    PrinterBidiSchemaElementType_Blob: 7
};