package service

import (
	"crypto/rand"
	"encoding/json"
	"math/big"
	"strings"
	"unicode"
)

func IsNumeric(str string) bool {
	for _, char := range str {
		if !unicode.IsDigit(char) {
			return false
		}
	}
	return true
}

func MakeSlug(s string) string {
	// Convert to lowercase
	s = strings.ToLower(s)

	// Replace spaces with hyphens
	s = strings.ReplaceAll(s, " ", "-")

	// Remove non-alphanumeric characters
	return strings.Map(func(r rune) rune {
		if unicode.IsLetter(r) || unicode.IsDigit(r) || r == '-' {
			return r
		}
		return -1
	}, s)
}

func GenerateNumericCode(codeLength int) (string, error) {
	const digits = "0123456789"
	result := make([]byte, codeLength)

	for i := 0; i < codeLength; i++ {
		num, err := rand.Int(rand.Reader, big.NewInt(int64(len(digits))))
		if err != nil {
			return "", err
		}
		result[i] = digits[num.Int64()]
	}

	return string(result), nil
}

func StructToMap(obj interface{}) (map[string]interface{}, error) {
	var result map[string]interface{}
	jsonData, err := json.Marshal(obj)
	if err != nil {
		return nil, err
	}

	err = json.Unmarshal(jsonData, &result)
	if err != nil {
		return nil, err
	}

	return result, nil
}