package cmd

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

	"github.com/spf13/cobra"
)

var logsCmd = &cobra.Command{
	Use:   "logs [container]",
	Short: "Open Dozzle in the browser, optionally deep-linking to a container",
	Args:  cobra.MaximumNArgs(1),
	RunE: func(cmd *cobra.Command, args []string) error {
		cfg, client, _, err := setup()
		if err != nil {
			return err
		}

		logsBase := deriveLogsURL(cfg.Portainer.URL)

		if len(args) == 0 {
			fmt.Printf("Opening %s\n", logsBase)
			return openBrowser(logsBase)
		}

		containerName := args[0]
		id, err := client.FindContainer(containerName)
		if err != nil {
			return err
		}

		// Dozzle uses a short ID (first 12 chars)
		shortID := id
		if len(shortID) > 12 {
			shortID = shortID[:12]
		}

		url := logsBase + "/container/" + shortID
		fmt.Printf("Opening %s\n", url)
		return openBrowser(url)
	},
}

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

func deriveLogsURL(portainerURL string) string {
	domain := stripScheme(portainerURL)
	// Replace "portainer." prefix with "logs."
	if idx := strings.Index(domain, "."); idx != -1 {
		return "https://logs." + domain[idx+1:]
	}
	return "https://logs." + domain
}

func stripScheme(u string) string {
	for _, prefix := range []string{"https://", "http://"} {
		if strings.HasPrefix(u, 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()
}