package main

/*
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "extensionCallback.h"
*/
import "C" // This is required to import the C code

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"log"
	"os"
	"reflect"
	"strings"
	"time"
	"unsafe"

	influxdb2 "github.com/influxdata/influxdb-client-go/v2"
	"github.com/jackc/pgx/v4"
	"github.com/jackc/pgx/v4/pgxpool"
)

// declare list of functions available for call
var AVAILABLE_FUNCTIONS = map[string]interface{}{
	"loadSettings":         loadSettings,
	"connectToInflux":      connectToInflux,
	"writeToInflux":        writeToInflux,
	"connectToTimescale":   connectToTimescale,
	"initTimescale":        initTimescale,
	"writeToTimescale":     writeToTimescale,
	"deinitialize":         deinitialize,
	"getDir":               getDir,
	"sanitizeLineProtocol": sanitizeLineProtocol,
}

var EXTENSION_VERSION string = "0.0.1"
var extensionCallbackFnc C.extensionCallback
var influxConnectionSettings influxSettings
var a3Settings arma3Settings
var timescaleConnectionSettings timescaleSettings
var timescaleDbPool *pgxpool.Pool

// InfluxDB variables
var DB_CLIENT influxdb2.Client

// file paths
var ADDON_FOLDER string = "./@RangerMetrics"
var LOG_FILE string = ADDON_FOLDER + "/rangermetrics.log"
var SETTINGS_FILE string = ADDON_FOLDER + "/settings.json"

// var BACKUP_FILE_PATH string = ADDON_FOLDER + "/local_backup.log.gzip"
// var BACKUP_WRITER *gzip.Writer

// configure log output
func init() {
	log.SetFlags(log.LstdFlags | log.Lshortfile)
	// log to file
	f, err := os.OpenFile(LOG_FILE, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
	if err != nil {
		log.Fatalf("error opening file: %v", err)
	}
	// log to console as well
	log.SetOutput(io.MultiWriter(f, os.Stdout))
}

// func RVExtensionContext(output *C.char, argc *C.int) {

// }

type influxSettings struct {
	Host  string `json:"host"`
	Token string `json:"token"`
	Org   string `json:"org"`
}

type timescaleSettings struct {
	ConnectionUrl string `json:"connectionUrl"`
}

type arma3Settings struct {
	RefreshRateMs int `json:"refreshRateMs"`
}

type settingsJson struct {
	Influx    influxSettings    `json:"influxdb"`
	Arma3     arma3Settings     `json:"arma3"`
	Timescale timescaleSettings `json:"timescaledb"`
}

func connectToInflux() {
	if influxConnectionSettings.Host == "" {
		logLine("connectToInflux", `["influxConnectionSettings.Host is empty", "ERROR"]`)
		// logLine("connectToInflux", `["Creating backup file", "INFO"]`)
		// file, err := os.Open(BACKUP_FILE_PATH)
		// if err != nil {
		// 	log.Fatal(err)
		// 	logLine("connectToInflux", `["Error opening backup file", "ERROR"]`)
		// }
		// BACKUP_WRITER = gzip.NewWriter(file)
		// if err != nil {
		// 	log.Fatal(err)
		// 	logLine("connectToInflux", `["Error creating gzip writer", "ERROR"]`)
		// }
		// return "Error connecting to Influx. Using local backup"
	}

	DB_CLIENT = influxdb2.NewClientWithOptions(influxConnectionSettings.Host, influxConnectionSettings.Token, influxdb2.DefaultOptions().SetBatchSize(500).SetFlushInterval(2000))

	logLine("connectToInflux", `["DB_CLIENT created", "INFO"]`)
}

//////////////////////////////////
// TIMESCALE
//////////////////////////////////

func connectToTimescale() {
	functionName := "connectToTimescale"
	var err error

	// urlExample := "postgres://username:password@localhost:5432/database_name"
	// logLine("connectToTimescale", fmt.Sprintf(`["timescaleConnectionSettings.ConnectionUrl: %s", "INFO"]`, timescaleConnectionSettings.ConnectionUrl))
	conn, err := pgx.Connect(context.Background(), timescaleConnectionSettings.ConnectionUrl)

	if err != nil {
		logLine(
			functionName,
			fmt.Sprintf(`["Unable to connect to Timescale DB: %v", "ERROR"]`, err.Error()),
		)
		// return fmt.Sprintf(`["Error connecting to timescale DB: %v\n"]`, err.Error())
	}

	conn.Exec(context.Background(), "CREATE DATABASE rangermetrics;")
	logLine("connectToTimescale", `["Connected to Timescale successfully", "INFO"]`)
}

func initTimescale() {
	// create a table
	// CREATE TABLE IF NOT EXISTS rangermetrics (time timestamp, line text);
	timescaleDbPool.Exec(context.Background(), "CREATE DATABASE rangermetrics;")

	// create entities table
	timescaleDbPool.Exec(context.Background(), `CREATE TABLE "public.Missions" (
		"id" serial NOT NULL UNIQUE,
		"world_name" VARCHAR(255) NOT NULL,
		"briefing_name" VARCHAR(255) NOT NULL,
		"mission_name" VARCHAR(255) NOT NULL,
		"mission_author" VARCHAR(255) NOT NULL,
		"server_name" VARCHAR(255) NOT NULL,
		"server_mods" TEXT,
		"ace_medical" BOOLEAN NOT NULL,
		"radio_tfar" BOOLEAN NOT NULL,
		"radio_acre" BOOLEAN NOT NULL,
		"start_game" DATETIME NOT NULL,
		"start_utc" DATETIME NOT NULL,
		"frame_count" FLOAT NOT NULL,
		"capture_delay_s" FLOAT NOT NULL,
		"addon_ver_major" integer NOT NULL,
		"addon_ver_minor" integer NOT NULL,
		"addon_ver_patch" integer NOT NULL,
		"extension_ver_major" integer NOT NULL,
		"extension_ver_minor" integer NOT NULL,
		"extension_ver_patch" integer NOT NULL,
		"tags" VARCHAR(255) NOT NULL,
		CONSTRAINT "Missions_pk" PRIMARY KEY ("id")
	) WITH (
		OIDS=FALSE
	);



	CREATE TABLE "public.Worlds" (
		"world_name" VARCHAR(255) NOT NULL,
		"display_name" VARCHAR(255) NOT NULL,
		"world_size_m" integer NOT NULL,
		CONSTRAINT "Worlds_pk" PRIMARY KEY ("world_name")
	) WITH (
		OIDS=FALSE
	);



	CREATE TABLE "public.Units" (
		"mission_id" integer NOT NULL,
		"unit_id" integer NOT NULL,
		"frame" integer NOT NULL,
		"steamid64" varchar(100),
		"steam_name" VARCHAR(255) NOT NULL,
		"a3_profile_name" VARCHAR(255) NOT NULL,
		"is_human" BOOLEAN NOT NULL,
		"is_afk" BOOLEAN NOT NULL,
		"is_alive" BOOLEAN NOT NULL,
		"unit_type" VARCHAR(255) NOT NULL,
		"role_description" VARCHAR(255),
		"side" integer NOT NULL,
		"group_id" varchar(100) NOT NULL,
		"name" VARCHAR(255),
		"position" VARCHAR(255) NOT NULL,
		"direction" FLOAT NOT NULL,
		"anim_state" varchar(100),
		"stance" VARCHAR(255),
		"traits" VARCHAR(255),
		"damage" FLOAT NOT NULL,
		"is_speaking" integer NOT NULL,
		CONSTRAINT "Units_pk" PRIMARY KEY ("mission_id","unit_id","frame")
	) WITH (
		OIDS=FALSE
	);



	CREATE TABLE "public.Vehicles" (
		"mission_id" integer NOT NULL,
		"frame" integer NOT NULL,
		"vehicle_id" integer NOT NULL,
		"object_type" VARCHAR(255),
		"weapons" varchar(3000),
		"customization" varchar(1000),
		"position" VARCHAR(255) NOT NULL,
		"direction" FLOAT NOT NULL,
		"vector_dir" varchar(70) NOT NULL,
		"vector_up" varchar(70) NOT NULL,
		"is_alive" BOOLEAN NOT NULL,
		"damage" FLOAT NOT NULL,
		CONSTRAINT "Vehicles_pk" PRIMARY KEY ("mission_id","frame","vehicle_id")
	) WITH (
		OIDS=FALSE
	);



	CREATE TABLE "public.Markers" (
		"mission_id" integer NOT NULL,
		"frame" integer NOT NULL,
		"marker_name" VARCHAR(255) NOT NULL,
		"data" VARCHAR(255) NOT NULL,
		CONSTRAINT "Markers_pk" PRIMARY KEY ("mission_id","frame","marker_name")
	) WITH (
		OIDS=FALSE
	);



	CREATE TABLE "public.Chat" (
		"id" serial NOT NULL,
		"mission_id" integer NOT NULL,
		"sender_id" integer NOT NULL,
		"frame" integer NOT NULL,
		"timestamp_utc" TIMESTAMP NOT NULL,
		"content" VARCHAR(255) NOT NULL,
		"channel" integer NOT NULL,
		CONSTRAINT "Chat_pk" PRIMARY KEY ("id")
	) WITH (
		OIDS=FALSE
	);



	CREATE TABLE "public.UniqueUsers" (
		"steamid64" varchar(100) NOT NULL,
		CONSTRAINT "UniqueUsers_pk" PRIMARY KEY ("steamid64")
	) WITH (
		OIDS=FALSE
	);



	CREATE TABLE "public.Environment" (
		"mission_id" integer NOT NULL,
		"frame" integer NOT NULL,
		"date_game" DATETIME NOT NULL,
		"date_utc" DATETIME NOT NULL,
		"overcast" FLOAT NOT NULL,
		"rain" FLOAT NOT NULL,
		"humidity" FLOAT NOT NULL,
		"fog_value" FLOAT NOT NULL,
		"fog_decay" FLOAT NOT NULL,
		"fog_base" FLOAT NOT NULL,
		"wind_vector" VARCHAR(255) NOT NULL,
		"gusts" FLOAT NOT NULL,
		"waves" FLOAT NOT NULL,
		CONSTRAINT "Environment_pk" PRIMARY KEY ("mission_id","frame")
	) WITH (
		OIDS=FALSE
	);



	CREATE TABLE "public.StaticObjects" (
		"mission_id" integer NOT NULL,
		"frame" integer NOT NULL,
		"building_id" integer NOT NULL,
		"position" integer NOT NULL,
		"direction" FLOAT NOT NULL,
		"vector_dir" varchar(70) NOT NULL,
		"vector_up" varchar(70) NOT NULL,
		"object_type" VARCHAR(255) NOT NULL,
		"classname" VARCHAR(255) NOT NULL,
		"simple_object_data" varchar(1500) NOT NULL,
		CONSTRAINT "StaticObjects_pk" PRIMARY KEY ("mission_id","frame","building_id")
	) WITH (
		OIDS=FALSE
	);



	CREATE TABLE "public.Campaigns" (
		"id" serial NOT NULL,
		"name" VARCHAR(255) NOT NULL,
		"description" TEXT NOT NULL,
		"image" bytea NOT NULL,
		CONSTRAINT "Campaigns_pk" PRIMARY KEY ("id")
	) WITH (
		OIDS=FALSE
	);



	CREATE TABLE "public.Missions_In_Campaigns" (
		"mission" integer NOT NULL,
		"campaign" integer NOT NULL,
		CONSTRAINT "Missions_In_Campaigns_pk" PRIMARY KEY ("mission","campaign")
	) WITH (
		OIDS=FALSE
	);



	ALTER TABLE "Missions" ADD CONSTRAINT "Missions_fk0" FOREIGN KEY ("world_name") REFERENCES "Worlds"("world_name");


	ALTER TABLE "Units" ADD CONSTRAINT "Units_fk0" FOREIGN KEY ("mission_id") REFERENCES "Missions"("id");
	ALTER TABLE "Units" ADD CONSTRAINT "Units_fk1" FOREIGN KEY ("steamid64") REFERENCES "UniqueUsers"("steamid64");

	ALTER TABLE "Vehicles" ADD CONSTRAINT "Vehicles_fk0" FOREIGN KEY ("mission_id") REFERENCES "Missions"("id");

	ALTER TABLE "Markers" ADD CONSTRAINT "Markers_fk0" FOREIGN KEY ("mission_id") REFERENCES "Missions"("id");

	ALTER TABLE "Chat" ADD CONSTRAINT "Chat_fk0" FOREIGN KEY ("mission_id") REFERENCES "Missions"("id");
	ALTER TABLE "Chat" ADD CONSTRAINT "Chat_fk1" FOREIGN KEY ("sender_id") REFERENCES "Units"("unit_id");


	ALTER TABLE "Environment" ADD CONSTRAINT "Environment_fk0" FOREIGN KEY ("mission_id") REFERENCES "Missions"("id");

	ALTER TABLE "StaticObjects" ADD CONSTRAINT "StaticObjects_fk0" FOREIGN KEY ("mission_id") REFERENCES "Missions"("id");


	ALTER TABLE "Missions_In_Campaigns" ADD CONSTRAINT "Missions_In_Campaigns_fk0" FOREIGN KEY ("mission") REFERENCES "Missions"("id");
	ALTER TABLE "Missions_In_Campaigns" ADD CONSTRAINT "Missions_In_Campaigns_fk1" FOREIGN KEY ("campaign") REFERENCES "Campaigns"("id");
`)

}

func writeToTimescale(table string, line string) {
	// logLine("writeToTimescale", fmt.Sprintf(`["line: %s", "INFO"]`, line))
	functionName := "writeToTimescale"
	_, err := timescaleDbPool.Exec(context.Background(), "INSERT INTO %1 (time, line) VALUES (NOW(), $2);", table, line)
	if err != nil {
		logLine(functionName, fmt.Sprintf(`["Error writing to timescale: %v", "ERROR"]`, err.Error()))
	}
}

func deinitialize() {
	logLine("deinitialize", `["deinitialize called", "INFO"]`)
	DB_CLIENT.Close()
	timescaleDbPool.Close()
}

// sanitize line protocol for influx
func sanitizeLineProtocol(line string) string {
	// replace all spaces with underscores
	// line = strings.ReplaceAll(line, ` `, `\ `)
	// replace all commas with underscores
	// line = strings.ReplaceAll(line, `,`, `\,`)
	// replace all equals with underscores
	// line = strings.ReplaceAll(line, "=", "_")
	// replace all quotes with underscores
	// line = strings.ReplaceAll(line, "\"", "_")

	return line
}

func getDir() string {
	dir, err := os.Getwd()
	if err != nil {
		log.Fatal(err)
	}
	return dir
}

func loadSettings() (dir string, result string, influxHost string, timescaleUrl string) {
	functionName := "loadSettings"
	logLine(functionName, fmt.Sprintf(`["ADDON_FOLDER: %s", "INFO"]`, ADDON_FOLDER))
	logLine(functionName, fmt.Sprintf(`["LOG_FILE: %s", "INFO"]`, LOG_FILE))
	logLine(functionName, fmt.Sprintf(`["SETTINGS_FILE: %s", "INFO"]`, SETTINGS_FILE))

	// print the current working directory
	var file *os.File
	var err error
	// read settings from file
	// settings.json should be in the same directory as the .dll
	// see if the file exists
	if _, err = os.Stat(SETTINGS_FILE); os.IsNotExist(err) {
		// file does not exist
		log.Println("settings.json does not exist")
		// create the file
		file, err = os.Create(SETTINGS_FILE)
		if err != nil {
			log.Fatal(err)
		}
		defer file.Close()
		// write the default settings to the file
		ifSet := influxSettings{
			Host:  "http://localhost:8086",
			Token: "my-token",
			Org:   "my-org",
		}
		a3Set := arma3Settings{
			RefreshRateMs: 1000,
		}
		tsSettings := timescaleSettings{
			ConnectionUrl: "postgres://username:password@localhost:5432/database_name",
		}
		defaultSettings := map[string]interface{}{
			"influxdb":  ifSet,
			"arma3":     a3Set,
			"timescale": tsSettings,
		}
		encoder := json.NewEncoder(file)
		err = encoder.Encode(defaultSettings)
		if err != nil {
			log.Fatal(err)
		}
		result = `["settings.json created - please modify!", "WARN"]`
		influxHost = ifSet.Host
		timescaleUrl = tsSettings.ConnectionUrl
		return dir, result, influxHost, timescaleUrl
	} else {
		// file exists
		log.Println("settings.json exists")
		// read the file
		file, err = os.Open(SETTINGS_FILE)
		if err != nil {
			log.Fatal(err)
		}
		defer file.Close()
		decoder := json.NewDecoder(file)
		var settings settingsJson
		err = decoder.Decode(&settings)
		if err != nil {
			log.Fatal(err)
		}
		// set the settings
		influxConnectionSettings = settings.Influx
		a3Settings = settings.Arma3
		timescaleConnectionSettings = settings.Timescale

		// set the result
		result = `["settings.json loaded", "INFO"]`
		influxHost = influxConnectionSettings.Host
		timescaleUrl = timescaleConnectionSettings.ConnectionUrl
	}

	return dir, result, influxHost, timescaleUrl
}

func runExtensionCallback(name *C.char, function *C.char, data *C.char) C.int {
	return C.runExtensionCallback(extensionCallbackFnc, name, function, data)
}

//export goRVExtensionVersion
func goRVExtensionVersion(output *C.char, outputsize C.size_t) {
	result := C.CString(EXTENSION_VERSION)
	defer C.free(unsafe.Pointer(result))
	var size = C.strlen(result) + 1
	if size > outputsize {
		size = outputsize
	}
	C.memmove(unsafe.Pointer(output), unsafe.Pointer(result), size)
}

//export goRVExtensionArgs
func goRVExtensionArgs(output *C.char, outputsize C.size_t, input *C.char, argv **C.char, argc C.int) {
	var offset = unsafe.Sizeof(uintptr(0))
	var out []string
	for index := C.int(0); index < argc; index++ {
		out = append(out, C.GoString(*argv))
		argv = (**C.char)(unsafe.Pointer(uintptr(unsafe.Pointer(argv)) + offset))
	}

	var temp string
	temp = fmt.Sprintf("Function: %s nb params: %d params: %s!", C.GoString(input), argc, out)

	if C.GoString(input) == "sendToInflux" {
		// start a goroutine to send the data to influx
		// param string is argv[0] which is the data to send to influx
		go writeToInflux(&out)
		temp = fmt.Sprintf("Function: %s nb params: %d", C.GoString(input), argc)
	}

	// Return a result to Arma
	result := C.CString(temp)
	defer C.free(unsafe.Pointer(result))
	var size = C.strlen(result) + 1
	if size > outputsize {
		size = outputsize
	}

	C.memmove(unsafe.Pointer(output), unsafe.Pointer(result), size)
}

func callBackExample() {
	name := C.CString("arma")
	defer C.free(unsafe.Pointer(name))
	function := C.CString("funcToExecute")
	defer C.free(unsafe.Pointer(function))
	// Make a callback to Arma
	for i := 0; i < 3; i++ {
		time.Sleep(2 * time.Second)
		param := C.CString(fmt.Sprintf("Loop: %d", i))
		defer C.free(unsafe.Pointer(param))
		runExtensionCallback(name, function, param)
	}
}

func getUnixTimeNano() int64 {
	// get the current unix timestamp in nanoseconds
	return time.Now().UnixNano()
}

func trimQuotes(s string) string {
	// trim the start and end quotes from a string
	return strings.Trim(s, `"`)
}

func fixEscapeQuotes(s string) string {
	// fix the escape quotes in a string
	return strings.Replace(s, `""`, `"`, -1)
}

func writeToInflux(a3DataRaw *[]string) string {

	// convert to string array
	a3Data := *a3DataRaw

	logLine("writeToInflux", fmt.Sprintf(`["Received %d params", "DEBUG"]`, len(a3Data)))

	MIN_PARAMS_COUNT := 1

	var logData string
	functionName := "writeToInflux"

	if len(a3Data) < MIN_PARAMS_COUNT {
		logData = fmt.Sprintf(`["Not all parameters present (got %d, expected at least %d)", "ERROR"]`, len(a3Data), MIN_PARAMS_COUNT)
		logLine(functionName, logData)
		return logData
	}

	// use custom bucket or default
	var bucket string = fixEscapeQuotes(trimQuotes(string(a3Data[0])))

	// Get non-blocking write client
	WRITE_API := DB_CLIENT.WriteAPI(influxConnectionSettings.Org, bucket)

	if WRITE_API == nil {
		logData = `["Error creating write API", "ERROR"]`
		logLine(functionName, logData)
		return logData
	}

	// Get errors channel
	errorsCh := WRITE_API.Errors()
	go func() {
		for writeErr := range errorsCh {
			logData = fmt.Sprintf(`["Error parsing line protocol: %s", "ERROR"]`, strings.Replace(writeErr.Error(), `"`, `'`, -1))
			logLine(functionName, logData)
		}
	}()

	// now we have our write client, we'll go through the rest of the receive array items in line protocol format and write them to influx
	for i := 1; i < len(a3Data); i++ {
		var p string = fixEscapeQuotes(trimQuotes(string(a3Data[i])))

		// write the line to influx
		WRITE_API.WriteRecord(p)

		// TODO: Add backup writer
		// // append backup line to file if BACKUP_WRITER is set
		// //
		// if BACKUP_WRITER != nil {
		// 	_, err = BACKUP_WRITER.Write([]byte(p + "\n"))
		// }

	}

	// schedule cleanup
	WRITE_API.Flush()
	logData = fmt.Sprintf(`["Wrote %d lines to influx", "INFO"]`, len(a3Data)-1)
	logLine(functionName, logData)

	return "Success"
}

func logLine(functionName string, data string) {
	statusName := C.CString("RangerMetrics")
	defer C.free(unsafe.Pointer(statusName))
	statusFunction := C.CString(functionName)
	defer C.free(unsafe.Pointer(statusFunction))
	statusParam := C.CString(data)
	defer C.free(unsafe.Pointer(statusParam))
	runExtensionCallback(statusName, statusFunction, statusParam)

	log.Println(data)
}

//export goRVExtension
func goRVExtension(output *C.char, outputsize C.size_t, input *C.char) {

	var temp string

	// check if input is in AVAILABLE_FUNCTIONS
	// if not, return error
	// if yes, continue
	if _, ok := AVAILABLE_FUNCTIONS[C.GoString(input)]; !ok {
		temp = fmt.Sprintf("Function: %s not found!", C.GoString(input))
	} else {
		// call the function by name
		reflect.ValueOf(AVAILABLE_FUNCTIONS[C.GoString(input)]).Call([]reflect.Value{})
	}

	// switch C.GoString(input) {
	// case "version":
	// 	logLine("goRVExtension", fmt.Sprintf(`["Input: %s",  "INFO"]`, C.GoString(input)))
	// 	temp = EXTENSION_VERSION
	// case "getDir":
	// 	logLine("goRVExtension", fmt.Sprintf(`["Input: %s",  "INFO"]`, C.GoString(input)))
	// 	temp = getDir()
	// case "loadSettings":
	// 	logLine("goRVExtension", fmt.Sprintf(`["Input: %s",  "INFO"]`, C.GoString(input)))
	// 	cwd, result, influxHost, timescaleUrl := loadSettings()
	// 	log.Println("CWD:", cwd)
	// 	log.Println("RESULT:", result)
	// 	log.Println("INFLUX HOST:", influxHost)
	// 	log.Println("TIMESCALE URL:", timescaleUrl)
	// 	if result != "" {
	// 		logLine("goRVExtension", result)
	// 		temp = fmt.Sprintf(
	// 			`["%s", "%s", "%s", "%d"]`,
	// 			EXTENSION_VERSION,
	// 			influxConnectionSettings.Host,
	// 			influxConnectionSettings.Org,
	// 			a3Settings.RefreshRateMs,
	// 		)
	// 	}
	// case "connectToInflux":
	// 	// logLine("goRVExtension", fmt.Sprintf(`["Input: %s",  "INFO"]`, C.GoString(input)))
	// 	go connectToInflux()
	// 	temp = `["Connecting to InfluxDB", "INFO"]`
	// case "connectToTimescale":
	// 	// logLine("goRVExtension", fmt.Sprintf(`["Input: %s",  "INFO"]`, C.GoString(input)))
	// 	go connectToTimescale()
	// 	temp = `["Connecting to TimescaleDB", "INFO"]`
	// case "getUnixTimeNano":
	// 	temp = fmt.Sprintf(`["%d", "INFO"]`, getUnixTimeNano())
	// case "deinitialize":
	// 	logLine("goRVExtension", fmt.Sprintf(`["Input: %s",  "INFO"]`, C.GoString(input)))
	// 	deinitialize()
	// 	temp = `["Deinitializing", "INFO"]`
	// default:
	// 	temp = fmt.Sprintf(`["Unknown command: %s", "ERROR"]`, C.GoString(input))
	// }

	result := C.CString(temp)
	defer C.free(unsafe.Pointer(result))
	var size = C.strlen(result) + 1
	if size > outputsize {
		size = outputsize
	}

	C.memmove(unsafe.Pointer(output), unsafe.Pointer(result), size)
	// return
}

//export goRVExtensionRegisterCallback
func goRVExtensionRegisterCallback(fnc C.extensionCallback) {
	extensionCallbackFnc = fnc
}

func main() {}