package cmd

import (
	"encoding/json"
	"fmt"
	"os"
	"time"

	"git.sr.ht/~timharek/yr-go/cmd/flags"
	"git.sr.ht/~timharek/yr-go/internal/nominatim"
	"git.sr.ht/~timharek/yr-go/yr"
	"github.com/pkg/browser"
	"github.com/spf13/cobra"
)

var nowCmd = &cobra.Command{
	Use:     "now <location>",
	Aliases: []string{"current", "n"},
	Short:   "Get current forecasted weather",
	Args:    cobra.MaximumNArgs(1),
	Run:     now,
}

func init() {
	rootCmd.AddCommand(nowCmd)
}

func now(cmd *cobra.Command, args []string) {
	isJson, err := cmd.Flags().GetBool(flags.JSON)
	cobra.CheckErr(err)
	isUTC, err := cmd.Flags().GetBool(flags.UTC)
	cobra.CheckErr(err)
	isWeb, err := cmd.Flags().GetBool(flags.WEB)
	cobra.CheckErr(err)
	lon, _ := cmd.Flags().GetFloat64(flags.LON)
	lat, _ := cmd.Flags().GetFloat64(flags.LAT)

	c, err := yr.New()
	cobra.CheckErr(err)

	if len(args) == 0 && (lon == 0 || lat == 0) {
		fmt.Fprintln(os.Stderr, "No location or coordinates provided.")
		os.Exit(1)
	}
	f := &yr.ForecastResult{}
	if len(args) == 0 {
		f, err = c.NowCoords(&nominatim.Coordinates{Longitude: lon, Latitude: lat}, nil)
		cobra.CheckErr(err)

	} else {
		location := args[0]
		f, err = c.Now(location)
		cobra.CheckErr(err)

	}

	if isWeb {
		url := fmt.Sprintf("https://www.yr.no/en/forecast/hourly-table/%.4f,%.4f/?i=0", f.Coordinates.Latitude, f.Coordinates.Longitude)
		err := browser.OpenURL(url)
		if err != nil {
			cobra.CheckErr(err)
		}
		os.Exit(0)
	}

	n := f.Forecast[0]

	if isJson {
		j, err := json.MarshalIndent(f, "", "  ")
		cobra.CheckErr(err)
		fmt.Printf("%s", j)
		return
	}

	itemTime := n.Time.Local()
	if isUTC {
		itemTime = n.Time
	}
	fmt.Printf(
		`%s now:
	%s
	Temperature: %.1f °C
	Rain: %.1f mm
	Wind: %.1f m/s from %s
`,
		n.Location,
		itemTime.Format(time.DateTime),
		n.Temperature,
		n.Percipitation,
		n.Wind.Speed,
		n.Wind.DirectionToString(),
	)
}