package constant

import "strings"

const (
	DefaultDNSTTL = 600
)

type DomainStrategy = uint8

const (
	DomainStrategyAsIS DomainStrategy = iota
	DomainStrategyPreferIPv4
	DomainStrategyPreferIPv6
	DomainStrategyIPv4Only
	DomainStrategyIPv6Only
)

const (
	DNSTypeLegacy      = "legacy"
	DNSTypeLegacyRcode = "legacy_rcode"
	DNSTypeUDP         = "udp"
	DNSTypeTCP         = "tcp"
	DNSTypeTLS         = "tls"
	DNSTypeHTTPS       = "https"
	DNSTypeQUIC        = "quic"
	DNSTypeHTTP3       = "h3"
	DNSTypeLocal       = "local"
	DNSTypeHosts       = "hosts"
	DNSTypeFakeIP      = "fakeip"
	DNSTypeDHCP        = "dhcp"
	DNSTypeTailscale   = "tailscale"
)

const (
	DNSProviderAliDNS       = "alidns"
	DNSProviderCloudflare   = "cloudflare"
	DNSProviderACMEDNS      = "acmedns"
	DNSProviderTencentCloud = "tencentcloud"
	DNSProviderDNSPod       = "dnspod"
)

func NormalizeACMEDNSProvider(provider string) string {
	switch strings.ToLower(strings.TrimSpace(provider)) {
	case "", DNSProviderAliDNS, DNSProviderCloudflare, DNSProviderACMEDNS:
		return strings.ToLower(strings.TrimSpace(provider))
	case "aliyun":
		return DNSProviderAliDNS
	case "cf":
		return DNSProviderCloudflare
	case "acme-dns":
		return DNSProviderACMEDNS
	case "tencent", "tencentcloud", "dnspod-tencentcloud", "qcloud":
		return DNSProviderTencentCloud
	case "dnspod":
		return DNSProviderDNSPod
	default:
		return strings.ToLower(strings.TrimSpace(provider))
	}
}