package schemas

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 Format string

const (
	FormatDeltaOnePointZero                Format = "Delta/1.0"
	FormatJsonSchemaDraftNegativeZeroSeven Format = "JsonSchema/draft-07"
)

func PossibleValuesForFormat() []string {
	return []string{
		string(FormatDeltaOnePointZero),
		string(FormatJsonSchemaDraftNegativeZeroSeven),
	}
}

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

func parseFormat(input string) (*Format, error) {
	vals := map[string]Format{
		"delta/1.0":           FormatDeltaOnePointZero,
		"jsonschema/draft-07": FormatJsonSchemaDraftNegativeZeroSeven,
	}
	if v, ok := vals[strings.ToLower(input)]; ok {
		return &v, nil
	}

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

type ProvisioningState string

const (
	ProvisioningStateAccepted  ProvisioningState = "Accepted"
	ProvisioningStateCanceled  ProvisioningState = "Canceled"
	ProvisioningStateDeleting  ProvisioningState = "Deleting"
	ProvisioningStateFailed    ProvisioningState = "Failed"
	ProvisioningStateSucceeded ProvisioningState = "Succeeded"
)

func PossibleValuesForProvisioningState() []string {
	return []string{
		string(ProvisioningStateAccepted),
		string(ProvisioningStateCanceled),
		string(ProvisioningStateDeleting),
		string(ProvisioningStateFailed),
		string(ProvisioningStateSucceeded),
	}
}

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

func parseProvisioningState(input string) (*ProvisioningState, error) {
	vals := map[string]ProvisioningState{
		"accepted":  ProvisioningStateAccepted,
		"canceled":  ProvisioningStateCanceled,
		"deleting":  ProvisioningStateDeleting,
		"failed":    ProvisioningStateFailed,
		"succeeded": ProvisioningStateSucceeded,
	}
	if v, ok := vals[strings.ToLower(input)]; ok {
		return &v, nil
	}

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

type SchemaType string

const (
	SchemaTypeMessageSchema SchemaType = "MessageSchema"
)

func PossibleValuesForSchemaType() []string {
	return []string{
		string(SchemaTypeMessageSchema),
	}
}

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

func parseSchemaType(input string) (*SchemaType, error) {
	vals := map[string]SchemaType{
		"messageschema": SchemaTypeMessageSchema,
	}
	if v, ok := vals[strings.ToLower(input)]; ok {
		return &v, nil
	}

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