// Copyright © 2016 Asteris, LLC
//
// 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 cmd

import (
	"errors"

	log "github.com/Sirupsen/logrus"
	"github.com/asteris-llc/converge/load"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"golang.org/x/net/context"
)

// validateCmd represents the validate command
var validateCmd = &cobra.Command{
	Use:   "validate",
	Short: "validate that the syntax of a module file is valid",
	PreRunE: func(cmd *cobra.Command, args []string) error {
		if len(args) == 0 {
			return errors.New("Need at least one module filename as argument, got 0")
		}
		return nil
	},
	Run: func(cmd *cobra.Command, args []string) {
		// set up execution context
		ctx, cancel := context.WithCancel(context.Background())
		GracefulExit(cancel)

		verifyModules := viper.GetBool("verify-modules")
		if !verifyModules {
			log.WithField("component", "client").Warn("skipping module verification")
		}

		for _, fname := range args {
			flog := log.WithField("file", fname)

			_, err := load.Load(ctx, fname, verifyModules)
			if err != nil {
				flog.WithError(err).Fatal("could not parse file")
			}

			flog.Info("module valid")
		}
	},
}

func init() {
	validateCmd.Flags().Bool("verify-modules", false, "verify module signatures")
	RootCmd.AddCommand(validateCmd)
}
