// Copyright 2015 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 commands

import (
	"runtime"
	"strings"

	"github.com/gohugoio/hugo/helpers"
	"github.com/gohugoio/hugo/hugolib"
	"github.com/gohugoio/hugo/resource/tocss/scss"
	"github.com/spf13/cobra"
	jww "github.com/spf13/jwalterweatherman"
)

var _ cmder = (*versionCmd)(nil)

type versionCmd struct {
	*baseCmd
}

func newVersionCmd() *versionCmd {
	return &versionCmd{
		newBaseCmd(&cobra.Command{
			Use:   "version",
			Short: "Print the version number of Hugo",
			Long:  `All software has versions. This is Hugo's.`,
			RunE: func(cmd *cobra.Command, args []string) error {
				printHugoVersion()
				return nil
			},
		}),
	}
}

func printHugoVersion() {
	program := "Hugo Static Site Generator"

	version := "v" + helpers.CurrentHugoVersion.String()
	if hugolib.CommitHash != "" {
		version += "-" + strings.ToUpper(hugolib.CommitHash)
	}
	if scss.Supports() {
		version += "/extended"
	}

	osArch := runtime.GOOS + "/" + runtime.GOARCH

	var buildDate string
	if hugolib.BuildDate != "" {
		buildDate = hugolib.BuildDate
	} else {
		buildDate = "unknown"
	}

	jww.FEEDBACK.Println(program, version, osArch, "BuildDate:", buildDate)
}