package cmd

import (
	"fmt"
	"os"
	"strings"

	"github.com/spf13/cobra"
)

// renameCmd represents the rename command
var renameCmd = &cobra.Command{
	Use:   "rename",
	Short: "Rename files in bulk based on specified patterns",
	Long: `Rename files in bulk based on specified patterns. 
    Example usage: dttt rename --pattern "prefix_###.jpg" --start 1 --directory ./images`,
	Run: func(cmd *cobra.Command, args []string) {
		// Handle command logic here
		directory, _ := cmd.Flags().GetString("directory")
		pattern, _ := cmd.Flags().GetString("pattern")
		start, _ := cmd.Flags().GetInt("start")

		// Check if required flags are provided
		if directory == "" || pattern == "" {
			cmd.Help()
			return
		}

		// Implement the renaming logic
		renameFiles(directory, pattern, start)
	},
}

func init() {
	rootCmd.AddCommand(renameCmd)

	// Define flags and configuration settings for the command
	renameCmd.Flags().StringP("directory", "d", ".", "Directory containing the files to rename")
	renameCmd.Flags().StringP("pattern", "p", "", "Pattern for renaming files. Use '###' as a placeholder for numeric sequence.")
	renameCmd.Flags().IntP("start", "s", 1, "Start index for numeric sequence in the renaming pattern")
}

// Function to rename files in bulk based on the specified pattern
func renameFiles(directory, pattern string, start int) {
	// List files in the specified directory
	files, err := os.ReadDir(directory)
	if err != nil {
		fmt.Println("Error:", err)
		return
	}

	// Iterate through each file in the directory
	for i, file := range files {
		// Generate the new filename based on the pattern
		newName := strings.Replace(pattern, "###", fmt.Sprintf("%d", start+i), 1)

		// Rename the file
		err := os.Rename(file.Name(), newName)
		if err != nil {
			fmt.Println("Error renaming file:", err)
			continue
		}
		fmt.Printf("Renamed %s to %s\n", file.Name(), newName)
	}
}