package main

import (
	"flag"
	"log"
	"os"

	"gopkg.in/ini.v1"
)

// ParseArgs is not yet implemented
func ParseArgs() error {
	return nil
}

// GetConfig fetch config from ini file
func GetConfig(configfile string, weatherconfig *WeatherConfig) error {
	flag.Usage = Usage

	config, err := ini.Load(configfile)
	HandleFatalError(err)

	var wc WeatherConfig

	owmSection := config.Section("owm")
	wc.OwmURL = owmSection.Key("url").String()
	wc.OwmAppID = owmSection.Key("appid").String()
	wc.OwmCities = owmSection.Key("cities").Strings(",")
	wc.OwmMeasurements = owmSection.Key("measurements").Strings(",")
	wc.OwmTable = owmSection.Key("table").String()

	influxdbSection := config.Section("influxdb")
	wc.InfluxHost = influxdbSection.Key("hostname").String()
	wc.InfluxPort, err = influxdbSection.Key("port").Int()
	HandleError(err)
	wc.InfluxUser = influxdbSection.Key("username").String()
	wc.InfluxPass = influxdbSection.Key("password").String()
	wc.InfluxDB = influxdbSection.Key("database").String()

	*weatherconfig = wc

	return err
}

// HandleError handles errors to return err
func HandleError(err error) error {
	if err != nil {
		return err
	}
	return nil
}

// HandleFatalError fatal errors
func HandleFatalError(err error) {
	if err != nil {
		log.Fatal(err)
		os.Exit(2)
	}
}

// Usage displays possible arguments
func Usage() {
	flag.PrintDefaults()
	os.Exit(1)
}