package env

import (
	"fmt"

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

var unsetCmd = &cobra.Command{
	Use:   "unset <app> KEY...",
	Short: "Unset environment variable(s)",
	Long:  "Remove one or more environment variables from an app.",
	Args:  cobra.MinimumNArgs(2),
	RunE:  runUnset,
}

func runUnset(cmd *cobra.Command, args []string) error {
	name := args[0]
	if err := state.ValidateName(name); err != nil {
		return err
	}
	keys := args[1:]

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

	host, _ := cmd.Flags().GetString("host")
	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("env is only available for apps, not static sites")
	}

	if app.Env == nil {
		return fmt.Errorf("no environment variables set")
	}

	changed := false
	for _, key := range keys {
		if _, exists := app.Env[key]; exists {
			delete(app.Env, key)
			changed = true
			fmt.Printf("Unset %s\n", key)
		} else {
			fmt.Printf("Warning: %s not found\n", key)
		}
	}

	if !changed {
		return nil
	}

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

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

	fmt.Println("-> Updating environment file on VPS...")
	envFilePath := fmt.Sprintf("/etc/ship/env/%s.env", name)
	envContent := ""
	for k, v := range app.Env {
		envContent += fmt.Sprintf("%s=%s\n", k, v)
	}
	if err := client.WriteSudoFile(envFilePath, envContent); err != nil {
		return fmt.Errorf("error updating env file: %w", err)
	}

	fmt.Println("-> Restarting service...")
	if _, err := client.RunSudo(fmt.Sprintf("systemctl restart %s", name)); err != nil {
		return fmt.Errorf("error restarting service: %w", err)
	}

	fmt.Println("Environment variables updated successfully")
	return nil
}