package cassandra

import (
	"reflect"
	"unicode"
)

// 判斷字串是否存在於 slice 中
func contains(list []string, target string) bool {
	for _, item := range list {
		if item == target {
			return true
		}
	}
	return false
}

// toSnakeCase 將 CamelCase 字串轉換為 snake_case
func toSnakeCase(s string) string {
	var result []rune
	for i, r := range s {
		if unicode.IsUpper(r) {
			if i > 0 {
				result = append(result, '_')
			}
			result = append(result, unicode.ToLower(r))
		} else {
			result = append(result, r)
		}
	}
	return string(result)
}

// 判斷欄位是否為零值或 nil
func isZero(v reflect.Value) bool {
	switch v.Kind() {
	case reflect.Ptr, reflect.Interface, reflect.Map, reflect.Slice:
		return v.IsNil()
	default:
		return reflect.DeepEqual(v.Interface(), reflect.Zero(v.Type()).Interface())
	}
}