// Copyright 2016-2018, Pulumi Corporation.  All rights reserved.

package cmd

import (
	"errors"

	"github.com/spf13/cobra"

	"github.com/pulumi/pulumi/pkg/util/cmdutil"
)

func newPreviewCmd() *cobra.Command {
	var debug bool
	var stack string

	// Flags for engine.UpdateOptions.
	var analyzers []string
	var color colorFlag
	var diffDisplay bool
	var parallel int
	var showConfig bool
	var showReplacementSteps bool
	var showSames bool

	var cmd = &cobra.Command{
		Use:        "preview",
		Aliases:    []string{"pre"},
		SuggestFor: []string{"build", "plan"},
		Short:      "Deprecated.  Use 'pulumi update --preview' instead",
		Long:       "Deprecated.  Use 'pulumi update --preview' instead",
		Args:       cmdutil.NoArgs,
		Run: cmdutil.RunFunc(func(cmd *cobra.Command, args []string) error {
			return errors.New(
				"`pulumi preview` is deprecated; `pulumi update` now perform previews by default")
		}),
	}

	cmd.PersistentFlags().BoolVarP(
		&debug, "debug", "d", false,
		"Print detailed debugging output during resource operations")
	cmd.PersistentFlags().StringVarP(
		&stack, "stack", "s", "",
		"Choose a stack other than the currently selected one")

	// Flags for engine.UpdateOptions.
	cmd.PersistentFlags().StringSliceVar(
		&analyzers, "analyzer", []string{},
		"Run one or more analyzers as part of this update")
	cmd.PersistentFlags().VarP(
		&color, "color", "c", "Colorize output. Choices are: always, never, raw, auto")
	cmd.PersistentFlags().BoolVar(
		&diffDisplay, "diff", false,
		"Display operation as a rich diff showing the overall change")
	cmd.PersistentFlags().IntVarP(
		&parallel, "parallel", "p", 0,
		"Allow P resource operations to run in parallel at once (<=1 for no parallelism)")
	cmd.PersistentFlags().BoolVar(
		&showConfig, "show-config", false,
		"Show configuration keys and variables")
	cmd.PersistentFlags().BoolVar(
		&showReplacementSteps, "show-replacement-steps", false,
		"Show detailed resource replacement creates and deletes instead of a single step")
	cmd.PersistentFlags().BoolVar(
		&showSames, "show-sames", false,
		"Show resources that needn't be updated because they haven't changed, alongside those that do")

	return cmd
}