package main

import (
	"fmt"

	"github.com/bdw/deploy/internal/ssh"
	"github.com/bdw/deploy/internal/state"
	"github.com/spf13/cobra"
)

var logsCmd = &cobra.Command{
	Use:   "logs <app>",
	Short: "View logs for a deployment",
	Args:  cobra.ExactArgs(1),
	RunE:  runLogs,
}

func init() {
	logsCmd.Flags().BoolP("follow", "f", false, "Follow logs")
	logsCmd.Flags().IntP("lines", "n", 50, "Number of lines to show")
}

func runLogs(cmd *cobra.Command, args []string) error {
	name := args[0]
	follow, _ := cmd.Flags().GetBool("follow")
	lines, _ := cmd.Flags().GetInt("lines")

	st, err := state.Load()
	if err != nil {
		return fmt.Errorf("error loading state: %w", err)
	}

	host := hostFlag
	if host == "" {
		host = st.GetDefaultHost()
	}

	if host == "" {
		return fmt.Errorf("--host is required")
	}

	app, err := st.GetApp(host, name)
	if err != nil {
		return err
	}

	if app.Type != "app" {
		return fmt.Errorf("logs are only available for apps, not static sites")
	}

	client, err := ssh.Connect(host)
	if err != nil {
		return fmt.Errorf("error connecting to VPS: %w", err)
	}
	defer client.Close()

	journalCmd := fmt.Sprintf("journalctl -u %s -n %d", name, lines)
	if follow {
		journalCmd += " -f"
	}

	if follow {
		if err := client.RunStream(journalCmd); err != nil {
			return fmt.Errorf("error fetching logs: %w", err)
		}
	} else {
		output, err := client.Run(journalCmd)
		if err != nil {
			return fmt.Errorf("error fetching logs: %w", err)
		}
		fmt.Print(output)
	}

	return nil
}