// Copyright 2017 Google Inc. All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to writing, software distributed
// under the License is distributed on a "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied.
//
// See the License for the specific language governing permissions and
// limitations under the License.

// Added as a .go file to avoid embedding issues of the template.

package main

import "text/template"

var generatedTmpl = template.Must(template.New("generated").Parse(`
// Code generated by "jsonenums {{.Command}}"; DO NOT EDIT.

package {{.PackageName}}

import (
	"encoding/json"
	"fmt"
)

{{range $typename, $values := .TypesAndValues}}

var (
	_{{$typename}}NameToValue map[string]{{$typename}}
	_{{$typename}}ValueToName map[{{$typename}}]string
)

func init() {
	_{{$typename}}NameToValue = map[string]{{$typename}} {
		{{range $values}}{{.}}.String(): {{.}},
		{{end}}
	}

	_{{$typename}}ValueToName = map[{{$typename}}]string {
		{{range $values}}{{.}}: {{.}}.String(),
		{{end}}
	}
}

// MarshalJSON implements json.Marshaler
func (r {{$typename}}) MarshalJSON() ([]byte, error) {
	if s, ok := interface{}(r).(fmt.Stringer); ok {
		return json.Marshal(s.String())
	}

	s, ok := _{{$typename}}ValueToName[r]
	if !ok {
		return nil, fmt.Errorf("invalid {{$typename}}: %d", r)
	}
	return json.Marshal(s)
}

// UnmarshalJSON implements json.Unmarshaler
func (r *{{$typename}}) UnmarshalJSON(data []byte) error {
	var s string
	if err := json.Unmarshal(data, &s); err != nil {
		return fmt.Errorf("{{$typename}} should be a string, got %s", data)
	}

	v, ok := _{{$typename}}NameToValue[s]
	if !ok {
		return fmt.Errorf("invalid value: %s", s)
	}

	*r = v
	return nil
}

{{end}}
`))