package cmd

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

	"git.sr.ht/~timharek/yr/pkg/nominatim"
	"git.sr.ht/~timharek/yr/yr"
	"github.com/pkg/browser"
	"github.com/spf13/cobra"
)

func forecastHelper(args []string) *yr.ForecastResult {
	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.ForecastCoords(&nominatim.Coordinates{Longitude: lon, Latitude: lat}, nil)
		cobra.CheckErr(err)
	} else {
		location := args[0]
		f, err = c.Forecast(location)
		cobra.CheckErr(err)
	}

	if isDebug {
		if !isUTC {
			f.Expires = f.Expires.Local()
			f.LastModified = f.LastModified.Local()
		}
		fmt.Printf("Expires: %v\n", f.Expires)
		fmt.Printf("LastModified: %v\n", f.LastModified)
		fmt.Printf("Default cache-dir: %v\n", os.TempDir())
	}

	return f
}

// Opens u in browser with added coordinates and exits
func openBrowser(u string, f *yr.ForecastResult) {
	url := u
	if f != nil {
		url = fmt.Sprintf(u, f.Coordinates.Latitude, f.Coordinates.Longitude)
	}
	err := browser.OpenURL(url)
	cobra.CheckErr(err)
	os.Exit(0)
}

// Returns forecast in pretty printed JSON and exits
func outputJson(v any) {
	j, err := json.MarshalIndent(v, "", "  ")
	cobra.CheckErr(err)
	fmt.Printf("%s\n", j)
	os.Exit(0)
}