package command

import (
	"fmt"
	"strings"

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

type VolumeStatusCommand struct {
	Meta
	length   int
	short    bool
	verbose  bool
	json     bool
	template string
}

func (c *VolumeStatusCommand) Help() string {
	helpText := `
Usage: nomad volume status [options] <id>

  Display status information about a CSI volume. If no volume id is given, a
  list of all volumes will be displayed.

  When ACLs are enabled, this command requires a token with the
  'csi-read-volume' and 'csi-list-volumes' capability for the volume's
  namespace.

General Options:

  ` + generalOptionsUsage(usageOptsDefault) + `

Status Options:

  -type <type>
    List only volumes of type <type>.

  -short
    Display short output. Used only when a single volume is being
    queried, and drops verbose information about allocations.

  -verbose
    Display full allocation information.

  -json
    Output the allocation in its JSON format.

  -t
    Format and display allocation using a Go template.
`
	return strings.TrimSpace(helpText)
}

func (c *VolumeStatusCommand) Synopsis() string {
	return "Display status information about a volume"
}

func (c *VolumeStatusCommand) AutocompleteFlags() complete.Flags {
	return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
		complete.Flags{
			"-type":    predictVolumeType,
			"-short":   complete.PredictNothing,
			"-verbose": complete.PredictNothing,
			"-json":    complete.PredictNothing,
			"-t":       complete.PredictAnything,
		})
}

func (c *VolumeStatusCommand) AutocompleteArgs() complete.Predictor {
	return complete.PredictFunc(func(a complete.Args) []string {
		client, err := c.Meta.Client()
		if err != nil {
			return nil
		}

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

func (c *VolumeStatusCommand) Name() string { return "volume status" }

func (c *VolumeStatusCommand) Run(args []string) int {
	var typeArg string

	flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
	flags.Usage = func() { c.Ui.Output(c.Help()) }
	flags.StringVar(&typeArg, "type", "", "")
	flags.BoolVar(&c.short, "short", false, "")
	flags.BoolVar(&c.verbose, "verbose", false, "")
	flags.BoolVar(&c.json, "json", false, "")
	flags.StringVar(&c.template, "t", "", "")

	if err := flags.Parse(args); err != nil {
		c.Ui.Error(fmt.Sprintf("Error parsing arguments %s", err))
		return 1
	}

	// Check that we either got no arguments or exactly one
	args = flags.Args()
	if len(args) > 1 {
		c.Ui.Error("This command takes either no arguments or one: <id>")
		c.Ui.Error(commandErrorText(c))
		return 1
	}

	// Truncate the id unless full length is requested
	c.length = shortId
	if c.verbose {
		c.length = fullId
	}

	// Get the HTTP client
	client, err := c.Meta.Client()
	if err != nil {
		c.Ui.Error(fmt.Sprintf("Error initializing client: %s", err))
		return 1
	}

	id := ""
	if len(args) == 1 {
		id = args[0]
	}

	code := c.csiStatus(client, id)
	if code != 0 {
		return code
	}

	// Extend this section with other volume implementations

	return 0
}