package smart

/*
	DISK SMART Service Listener
	Original author: alanyeung
	Rewritten by tobychui in Oct 2020 for system arch upgrade

	This module is not the core part of aroz online system.
	If you want to remove disk smart handler (e.g. running in VM?)
	remove the corrisponding code in disk.go
*/

import (
	"encoding/json"
	"log"
	"net/http"
	//"os/exec"
	"runtime"
	"errors"
	"time"
)

// SMART was used for storing all Devices data
type SMART struct {
	Port       string       `json:"Port"`
	DriveSmart *DeviceSMART `json:"SMART"`
}

type SMARTListener struct{
	SystemSmartExecutable string
	LastScanTime int64
	SMARTInformation []**SMART
	ReadingInProgress bool
}

// DiskSmartInit Desktop script initiation
func NewSmartListener() (*SMARTListener, error){
	SystemSmartExecutable := getBinary()

	log.Println("Starting SMART mointoring")

	if (SystemSmartExecutable == "") {
		return &SMARTListener{}, errors.New("Not supported platform")
	}

	if !(fileExists(SystemSmartExecutable)) {
		return &SMARTListener{}, errors.New("Smartctl not found")
	}

	devicesList := scanAvailableDevices(SystemSmartExecutable)
	devicesSMART := readSMARTDevices(SystemSmartExecutable,devicesList)

	return &SMARTListener{
		SystemSmartExecutable: SystemSmartExecutable,
		LastScanTime: time.Now().Unix(),
		SMARTInformation: devicesSMART,
	},nil
}

func scanAvailableDevices(SystemSmartExecutable string) *DevicesList{
	rawInfo := execCommand(SystemSmartExecutable, "--scan", "--json=c")
	Devices := new(DevicesList)
	json.Unmarshal([]byte(rawInfo), &Devices)
	return Devices
}

func readSMARTDevices(SystemSmartExecutable string, devicesList *DevicesList) []**SMART{
	SMARTInfo := []**SMART{}
	for _, device := range devicesList.Devices {
		rawInfo := execCommand(SystemSmartExecutable, "-i", device.Name, "-a", "--json=c")
		deviceSMART := new(SMART)
		json.Unmarshal([]byte(rawInfo), &deviceSMART)
		SMARTInfo = append(SMARTInfo, &deviceSMART)
	}
	return SMARTInfo
}

func getBinary() string{
	if runtime.GOOS == "windows" {
		return "./system/disk/smart/win/smartctl.exe"
	} else if runtime.GOOS == "linux" {
		if runtime.GOARCH == "arm" {
			return "./system/disk/smart/linux/smartctl_armv6"
		}
		if runtime.GOARCH == "arm64" {
			return "./system/disk/smart/linux/smartctl_armv6"
		}
		if runtime.GOARCH == "386" {
			return "./system/disk/smart/linux/smartctl_i386"
		}
		if runtime.GOARCH == "amd64" {
			return "./system/disk/smart/linux/smartctl_i386"
		}
	}
	return ""
}


func (s *SMARTListener)CheckDiskTable(w http.ResponseWriter, r *http.Request) {
	sendJSONResponse(w, string(""))
}

func (s *SMARTListener)CheckDiskTestStatus(w http.ResponseWriter, r *http.Request) {
	sendJSONResponse(w, string(""))
}

func (s *SMARTListener)GetSMART(w http.ResponseWriter, r *http.Request) {
	sendJSONResponse(w, string(""))
}