package raid

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

// Get the next avaible RAID array name
func GetNextAvailableMDDevice() (string, error) {
	for i := 0; i < 100; i++ {
		mdDevice := fmt.Sprintf("/dev/md%d", i)
		if _, err := os.Stat(mdDevice); os.IsNotExist(err) {
			return mdDevice, nil
		}
	}

	return "", fmt.Errorf("no available /dev/mdX devices found")
}

func DeviceIsMounted(devicePath string) (bool, error) {
	// Open the mountinfo file
	file, err := os.Open("/proc/mounts")
	if err != nil {
		return false, fmt.Errorf("error opening /proc/mounts: %v", err)
	}
	defer file.Close()

	// Scan the mountinfo file line by line
	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		line := scanner.Text()
		fields := strings.Fields(line)
		if len(fields) >= 2 && fields[0] == devicePath {
			// Device is mounted
			return true, nil
		}
	}

	// Device is not mounted
	return false, nil
}