package command

import (
	"strings"

	"github.com/hashicorp/nomad/api/contexts"
	"github.com/mitchellh/cli"
	"github.com/posener/complete"
)

type VarCommand struct {
	Meta
}

func (f *VarCommand) Help() string {
	helpText := `
Usage: nomad var <subcommand> [options] [args]

  This command groups subcommands for interacting with variables. Variables
  allow operators to provide credentials and otherwise sensitive material to
  Nomad jobs at runtime via the template stanza or directly through
  the Nomad API and CLI.

  Users can create new variables; list, inspect, and delete existing
  variables, and more. For a full guide on variables see:
  https://www.nomadproject.io/guides/vars.html

  Create a variable specification file:

      $ nomad var init

  Upsert a variable:

      $ nomad var put <path>

  Examine a variable:

      $ nomad var get <path>

  List existing variables:

      $ nomad var list <prefix>

  Please see the individual subcommand help for detailed usage information.
`

	return strings.TrimSpace(helpText)
}

func (f *VarCommand) Synopsis() string {
	return "Interact with variables"
}

func (f *VarCommand) Name() string { return "var" }

func (f *VarCommand) Run(args []string) int {
	return cli.RunResultHelp
}

// VariablePathPredictor returns a var predictor
func VariablePathPredictor(factory ApiClientFactory) complete.Predictor {
	return complete.PredictFunc(func(a complete.Args) []string {
		client, err := factory()
		if err != nil {
			return nil
		}

		resp, _, err := client.Search().PrefixSearch(a.Last, contexts.Variables, nil)
		if err != nil {
			return []string{}
		}
		return resp.Matches[contexts.Variables]
	})
}