package cmd

import (
	"fmt"
	"os/exec"
	"runtime"

	"github.com/spf13/cobra"
)

var logsCmd = &cobra.Command{
	Use:   "logs",
	Short: "Open the Dozzle log viewer in the browser",
	RunE: func(cmd *cobra.Command, args []string) error {
		cfg, _, _, err := setup()
		if err != nil {
			return err
		}

		// Derive logs URL from Portainer URL (same base domain)
		// e.g. https://portainer.home.jens.pub → https://logs.home.jens.pub
		logsURL := deriveLogsURL(cfg.Portainer.URL)
		fmt.Printf("Opening %s\n", logsURL)
		return openBrowser(logsURL)
	},
}

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

func deriveLogsURL(portainerURL string) string {
	// Replace "portainer." prefix with "logs."
	return fmt.Sprintf("https://logs.%s", domainFromURL(portainerURL))
}

func domainFromURL(u string) string {
	// Strip scheme and find domain after first dot
	u = stripScheme(u)
	for i, c := range u {
		if c == '.' {
			return u[i+1:]
		}
	}
	return u
}

func stripScheme(u string) string {
	for _, prefix := range []string{"https://", "http://"} {
		if len(u) > len(prefix) && u[:len(prefix)] == prefix {
			return u[len(prefix):]
		}
	}
	return u
}

func openBrowser(url string) error {
	var cmd *exec.Cmd
	switch runtime.GOOS {
	case "darwin":
		cmd = exec.Command("open", url)
	case "linux":
		cmd = exec.Command("xdg-open", url)
	default:
		return fmt.Errorf("unsupported platform: %s", runtime.GOOS)
	}
	return cmd.Start()
}