package cmd

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

	"github.com/lerko/nib/internal/db"
	"github.com/lerko/nib/internal/display"
	"github.com/spf13/cobra"
)

var editCmd = &cobra.Command{
	Use:   "edit <id>",
	Short: "edit entity body in $EDITOR",
	Args:  cobra.ExactArgs(1),
	RunE:  runEdit,
}

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

func runEdit(_ *cobra.Command, args []string) error {
	store, err := openStore()
	if err != nil {
		return err
	}
	defer store.Close()

	id, err := store.Resolve(args[0])
	if err != nil {
		return fmt.Errorf("not_found — no entity with id %s", args[0])
	}

	e, err := store.Get(id)
	if err != nil {
		return err
	}

	tmpfile, err := os.CreateTemp("", "nib-*.md")
	if err != nil {
		return err
	}
	defer os.Remove(tmpfile.Name())

	if _, err := tmpfile.WriteString(e.Body); err != nil {
		tmpfile.Close()
		return err
	}
	tmpfile.Close()

	editor := os.Getenv("EDITOR")
	if editor == "" {
		editor = "vi"
	}

	cmd := exec.Command(editor, tmpfile.Name())
	cmd.Stdin = os.Stdin
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err := cmd.Run(); err != nil {
		return fmt.Errorf("editor: %w", err)
	}

	newBody, err := os.ReadFile(tmpfile.Name())
	if err != nil {
		return err
	}

	body := string(newBody)
	if body == e.Body {
		fmt.Println("(no changes)")
		return nil
	}

	if err := store.Update(id, &db.EntityUpdate{Body: &body}); err != nil {
		return err
	}

	fmt.Printf("updated %s\n", display.FormatID(id))
	return nil
}