package main

import (
	"fmt"

	nut "github.com/robbiet480/go.nut"
	"github.com/spf13/viper"
)

var upsClient nut.Client
var ups nut.UPS
var upsVars map[string]nut.Variable

func init() {
	viper.SetDefault("UpsHost", "localhost")
	viper.SetDefault("UpsName", "ups")
	viper.SetDefault("UpsUsername", "")
	viper.SetDefault("UpsPassword", "")
}

func UpsConnect() {
	var username, password string
	var connectErr, authenticationError error
	var u nut.UPS

	upsClient, connectErr = nut.Connect(viper.GetString("UpsHost"))
	if connectErr != nil {
		fmt.Print(connectErr)
		return
	}

	if username = viper.GetString("UpsUsername"); username == "" {
		return
	}
	if password = viper.GetString("UpsPassword"); password == "" {
		return
	}

	_, authenticationError = upsClient.Authenticate(username, password)
	if authenticationError != nil {
		fmt.Print(authenticationError)
		return
	}

	upsList, listErr := upsClient.GetUPSList()
	if listErr != nil {
		fmt.Print(listErr)
		return
	}

	for _, u = range upsList {
		if u.Name == viper.GetString("UpsName") {
			ups = u
			fmt.Print("UPS connected")
			UpsReadVars()
		}
	}
}

func UpsReadVars() {
	upsVars = map[string]nut.Variable{}
	for _, v := range ups.Variables {
		upsVars[v.Name] = v
	}
}

func UpsReconfigure() {
	ups = nut.UPS{}
	upsClient = nut.Client{}
	fmt.Print("UPS disconnected")
	go UpsConnect()
}