package digitalocean

import (
	"crypto/sha1"
	"encoding/hex"
	"hash/crc32"

	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
)

func HashString(s string) string {
	hash := sha1.Sum([]byte(s))
	return hex.EncodeToString(hash[:])
}

func HashStringStateFunc() schema.SchemaStateFunc {
	return func(v interface{}) string {
		switch v.(type) {
		case string:
			return HashString(v.(string))
		default:
			return ""
		}
	}
}

// hashcode.String in the terraform-plugin-sdk was made internal to the SDK in v2.
// Embed the implementation here to allow same hash function to continue to be used
// by the code in this provider that used it for hash computation.
func SDKHashString(s string) int {
	v := int(crc32.ChecksumIEEE([]byte(s)))
	if v >= 0 {
		return v
	}
	if -v >= 0 {
		return -v
	}
	// v == MinInt
	return 0
}