// Copyright 2018 The Hugo Authors. 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 in writing, software
// distributed under the License is distributed on an "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.

package hugo

import (
	"fmt"
	"html/template"
)

const (
	EnvironmentDevelopment = "development"
	EnvironmentProduction  = "production"
)

var (
	// commitHash contains the current Git revision. Use make to build to make
	// sure this gets set.
	commitHash string

	// buildDate contains the date of the current build.
	buildDate string
)

// Info contains information about the current Hugo environment
type Info struct {
	CommitHash string
	BuildDate  string

	// The build environment.
	// Defaults are "production" (hugo) and "development" (hugo server).
	// This can also be set by the user.
	// It can be any string, but it will be all lower case.
	Environment string
}

// Version returns the current version as a comparable version string.
func (i Info) Version() VersionString {
	return CurrentVersion.Version()
}

// Generator a Hugo meta generator HTML tag.
func (i Info) Generator() template.HTML {
	return template.HTML(fmt.Sprintf(`<meta name="generator" content="Hugo %s" />`, CurrentVersion.String()))
}

func (i Info) IsProduction() bool {
	return i.Environment == EnvironmentProduction
}

// NewInfo creates a new Hugo Info object.
func NewInfo(environment string) Info {
	if environment == "" {
		environment = EnvironmentProduction
	}
	return Info{
		CommitHash:  commitHash,
		BuildDate:   buildDate,
		Environment: environment,
	}
}