package checknameavailabilitydisasterrecoveryconfigs

import (
	"encoding/json"
	"fmt"
	"strings"
)

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See NOTICE.txt in the project root for license information.

type UnavailableReason string

const (
	UnavailableReasonInvalidName                           UnavailableReason = "InvalidName"
	UnavailableReasonNameInLockdown                        UnavailableReason = "NameInLockdown"
	UnavailableReasonNameInUse                             UnavailableReason = "NameInUse"
	UnavailableReasonNone                                  UnavailableReason = "None"
	UnavailableReasonSubscriptionIsDisabled                UnavailableReason = "SubscriptionIsDisabled"
	UnavailableReasonTooManyNamespaceInCurrentSubscription UnavailableReason = "TooManyNamespaceInCurrentSubscription"
)

func PossibleValuesForUnavailableReason() []string {
	return []string{
		string(UnavailableReasonInvalidName),
		string(UnavailableReasonNameInLockdown),
		string(UnavailableReasonNameInUse),
		string(UnavailableReasonNone),
		string(UnavailableReasonSubscriptionIsDisabled),
		string(UnavailableReasonTooManyNamespaceInCurrentSubscription),
	}
}

func (s *UnavailableReason) UnmarshalJSON(bytes []byte) error {
	var decoded string
	if err := json.Unmarshal(bytes, &decoded); err != nil {
		return fmt.Errorf("unmarshaling: %+v", err)
	}
	out, err := parseUnavailableReason(decoded)
	if err != nil {
		return fmt.Errorf("parsing %q: %+v", decoded, err)
	}
	*s = *out
	return nil
}

func parseUnavailableReason(input string) (*UnavailableReason, error) {
	vals := map[string]UnavailableReason{
		"invalidname":                           UnavailableReasonInvalidName,
		"nameinlockdown":                        UnavailableReasonNameInLockdown,
		"nameinuse":                             UnavailableReasonNameInUse,
		"none":                                  UnavailableReasonNone,
		"subscriptionisdisabled":                UnavailableReasonSubscriptionIsDisabled,
		"toomanynamespaceincurrentsubscription": UnavailableReasonTooManyNamespaceInCurrentSubscription,
	}
	if v, ok := vals[strings.ToLower(input)]; ok {
		return &v, nil
	}

	// otherwise presume it's an undefined value and best-effort it
	out := UnavailableReason(input)
	return &out, nil
}
