package validation

import "fmt"

func GetUpdatedValue[T any](def T, new *T) T {
	if new != nil {
		return *new
	}
	return def
}

func DeduplicateArray[T comparable](arr []T) []T {
	occurred := make(map[T]bool)
	result := []T{}

	for _, value := range arr {
		if !occurred[value] {
			occurred[value] = true
			result = append(result, value)
		}
	}

	return result
}

func NormalizeInClosedInterval(updated **int32, current int32, min int32, max int32) error {
	if updated == nil || *updated == nil {
		return nil
	}

	if **updated == current {
		*updated = nil
		return nil
	}

	if **updated < min || **updated > max {
		return fmt.Errorf("update must be in range: %d <= update <= %d", min, max)
	}

	return nil
}