package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"log"
	"os"
	"strings"

	"github.com/briandowns/openweathermap"
)

var apiKey = "91dbd7a9a3ab3f06b9d944d42d76faf8"
var zipCode = 30310
var units = "C"

func init() {
	//flag.StringVar(&apiKey, "api", "", "API key for openweathermap.com")
	flag.IntVar(&zipCode, "zip", 30310, "zip code for weather location")
}

type output struct {
	Text    string `json:"text"`
	Alt     string `json:"alt"`
	Tooltip string `json:"tooltip"`
}

func main() {
	flag.Parse()

	c, err := openweathermap.NewCurrent(units, "en", apiKey)
	if err != nil {
		log.Fatal("failed to create current weather service:", err)
	}
	if err := c.CurrentByZip(zipCode, "us"); err != nil {
		log.Fatal("failed to get local weather:", err)
	}

	today := c.Weather[0]
	// fmt.Printf("%s %.0f°C %d%%", today.Description, c.Main.Temp, c.Main.Humidity)

	json.NewEncoder(os.Stdout).Encode(&output{
		Text:    fmt.Sprintf("%0.f°C %d%% %s", c.Main.Temp, c.Main.Humidity, weatherIcon(today.Description)),
		Alt:     fmt.Sprintf("%s %.0f°C %d%% %s", today.Description, c.Main.Temp, c.Main.Humidity, weatherIcon(today.Description)),
		Tooltip: fmt.Sprintf("%s %.0f°C %d%% %s\r%.0f°/%.0f°", today.Description, c.Main.Temp, c.Main.Humidity, weatherIcon(today.Description), c.Main.TempMax, c.Main.TempMin),
	})
}

func containsOf(ref string, cmp ...string) bool {
	for _, x := range cmp {
		if strings.Contains(ref, x) {
			return true
		}
	}
	return false
}

func weatherIcon(desc string) string {
	d := strings.ToLower(desc)
	switch {
	case containsOf(d, "clear", "sunny"):
		return ""
	case containsOf(d, "partly cloudy", "clouds"):
		return ""
	case containsOf(d, "cloudy"):
		return ""
	case containsOf(d, "overcast"):
		return ""
	case containsOf(d, "mist", "fog", "haze"):
		return ""
	case containsOf(d, "patchy rain", "drizzle", "light rain"):
		return ""
	case containsOf(d, "thunder"):
		return ""
	case containsOf(d, "freezing", "sleet", "hail", "ice"):
		return ""
	case containsOf(d, "rain"):
		return ""
	case containsOf(d, "blizzard", "heavy snow"):
		return ""
	case containsOf(d, "snow"):
		return ""
	default:
		return ""
	}
}