package samba

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

/*

	Samba Share Warpper

	Note that this module only provide exposing of local disk / storage.
	This module do not handle providing the virtualized interface for samba

*/

type SambaConfigEditor struct {
	SambaConfigPath string
}

// AppendSambaShareConfig appends the Samba share configuration to smb.conf
func (s *SambaConfigEditor) AppendSambaShareConfig(config string) error {
	file, err := os.OpenFile("/etc/samba/smb.conf", os.O_APPEND|os.O_WRONLY, 0644)
	if err != nil {
		return err
	}
	defer file.Close()

	if _, err := file.WriteString(config); err != nil {
		return err
	}

	return nil
}

// RemoveSambaShareConfig removes the Samba share configuration from smb.conf
func (s *SambaConfigEditor) RemoveSambaShareConfig(shareName string) error {
	// Open the smb.conf file for reading
	file, err := os.Open("/etc/samba/smb.conf")
	if err != nil {
		return err
	}
	defer file.Close()

	// Create a temporary file to store modified smb.conf
	tmpFile, err := os.CreateTemp("", "smb.conf.*.tmp")
	if err != nil {
		return err
	}
	defer tmpFile.Close()

	// Create a scanner to read the smb.conf file line by line
	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		line := scanner.Text()

		// Check if the line contains the share name
		if strings.HasPrefix(line, "["+shareName+"]") {
			// Skip the lines until the next section
			for scanner.Scan() {
				if strings.HasPrefix(scanner.Text(), "[") {
					break
				}
			}
			continue // Skip writing the share configuration to the temporary file
		}

		// Write the line to the temporary file
		_, err := fmt.Fprintln(tmpFile, line)
		if err != nil {
			return err
		}
	}

	// Check for scanner errors
	if err := scanner.Err(); err != nil {
		return err
	}

	// Close the original smb.conf file
	if err := file.Close(); err != nil {
		return err
	}

	// Close the temporary file
	if err := tmpFile.Close(); err != nil {
		return err
	}

	// Replace the original smb.conf file with the temporary file
	if err := os.Rename(tmpFile.Name(), "/etc/samba/smb.conf"); err != nil {
		return err
	}

	return nil
}