package command

import (
	"fmt"
	"strings"

	"github.com/posener/complete"
)

type ACLTokenUpdateCommand struct {
	Meta
}

func (c *ACLTokenUpdateCommand) Help() string {
	helpText := `
Usage: nomad acl token update <token_accessor_id>

  Update is used to update an existing ACL token. Requires a management token.

General Options:

  ` + generalOptionsUsage() + `

Update Options:

  -name=""
    Sets the human readable name for the ACL token.

  -type="client"
    Sets the type of token. Must be one of "client" (default), or "management".

  -global=false
    Toggles the global mode of the token. Global tokens are replicated to all regions.

  -policy=""
    Specifies a policy to associate with the token. Can be specified multiple times,
    but only with client type tokens.
`

	return strings.TrimSpace(helpText)
}

func (c *ACLTokenUpdateCommand) AutocompleteFlags() complete.Flags {
	return mergeAutocompleteFlags(c.Meta.AutocompleteFlags(FlagSetClient),
		complete.Flags{
			"name":   complete.PredictAnything,
			"type":   complete.PredictAnything,
			"global": complete.PredictNothing,
			"policy": complete.PredictAnything,
		})
}

func (c *ACLTokenUpdateCommand) AutocompleteArgs() complete.Predictor {
	return complete.PredictNothing
}

func (c *ACLTokenUpdateCommand) Synopsis() string {
	return "Update an existing ACL token"
}

func (*ACLTokenUpdateCommand) Name() string { return "acl token update" }

func (c *ACLTokenUpdateCommand) Run(args []string) int {
	var name, tokenType string
	var global bool
	var policies []string
	flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
	flags.Usage = func() { c.Ui.Output(c.Help()) }
	flags.StringVar(&name, "name", "", "")
	flags.StringVar(&tokenType, "type", "client", "")
	flags.BoolVar(&global, "global", false, "")
	flags.Var((funcVar)(func(s string) error {
		policies = append(policies, s)
		return nil
	}), "policy", "")
	if err := flags.Parse(args); err != nil {
		return 1
	}

	// Check that we got exactly one argument
	args = flags.Args()
	if l := len(args); l != 1 {
		c.Ui.Error("This command takes one argument: <token_accessor_id>")
		c.Ui.Error(commandErrorText(c))
		return 1
	}

	tokenAccessorID := args[0]

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

	// Get the specified token
	token, _, err := client.ACLTokens().Info(tokenAccessorID, nil)
	if err != nil {
		c.Ui.Error(fmt.Sprintf("Error fetching token: %s", err))
		return 1
	}

	// Create the updated token
	if name != "" {
		token.Name = name
	}

	if tokenType != "" {
		token.Type = tokenType
	}

	// This will default to false if the user does not specify it
	if global != token.Global {
		token.Global = global
	}

	if len(policies) != 0 {
		token.Policies = policies
	}

	// Update the token
	updatedToken, _, err := client.ACLTokens().Update(token, nil)
	if err != nil {
		c.Ui.Error(fmt.Sprintf("Error updating token: %s", err))
		return 1
	}

	// Format the output
	c.Ui.Output(formatKVACLToken(updatedToken))
	return 0
}